The Cal-look Lounge

Thinking about the typical hot rodded VW of today, what with 84mm cranks, aluminum cases, 4" pistons, 48mm+ valves... things sure have come a long long way from the Okrasa kits for the 36hp, the 88mm "big" ( ;D) bores, and the introduction of the dual port VW cylinder head. One might think, "If it doesn't have 200+ hp, and run deep into the 12's thru the traps, it must be a big dud and NO fun.", which is a shame.
With a light car like the Type 1 VW, a good time can be had, truly, with much less firepower. I've always thought the stock 1600 would make a great base from which to augment, not in huge jumps of displacement, but rather in moderate tuning efforts, trying as damn hard as I could, to utilize as much of the original VW-unit as possible, yet update its power delivery, and sharpen its character. A goal of 125hp should make for a lively car. Figure a zero to sixty mph in the mid sixes, and a 1/4-mile of 14-15 secs. Above all.... reatining a very Germanic character.
When I was younger, I did build something along these lines, and it sure was fun. Compared to the single port 1500, and later the stock cammed 1641, it was light years ahead in power and response. Honestly, it probably made no more than 90hp, but its powerband, sound and lively personality is what made it so much fun. Sure, now that I'm older, it's easier to follow that old adage "there's no replacement for displacement", but I still think there is something very admirable and jewelike about the Volkswagen when, for the most part, is left alone. A nice 87 or 88 bore engine, with a pair of small IDFs or even Solex 40PII's, stock valved dual port heads with smoothed and softened port contours, increased cam timing (think 120 Engle), and a nice tuned header, the ubiquitous 009 or 010, and a step up in compression. Nothing that hasn't been done before really, but rarely seen in these days of "over the top" scary motors. The tuned, smaller cc engine, while it may not spit diffs out and eat axles for lunch, still has its own certain charm.
While some might say "why bother, you can build a 1914 for a little more money", that's not the point. For a fun ride, my point is, you don't NEED 1900+cc...  really, thinking of it, 150+hp in a 1900lb car is really bordering on a bit insane and a little ridiculous. But yeah, lots of fun.
Comments?

I agree Jim.  My first was a pretty much stock 1600 with an Engle 100 cam.  It had some good stuff like a new engine case and counterweighted crank.  It was fully balanced, but had the original 1300 single port intake manifold and stock carb.  009 for ignition.  It would rev to 6000 in first and second (floating the valves for sure), but it was a lot of fun.  I had it full flowed with an Oberg filter.  I could cruise at 75mph all day and never overheat it, even in Phoenix summer heat.  It had plenty of torque for a small motor and would pull many domestic cars on steep up-hills at speed.  The heads were stock.  When I went to rebuild the heads I took them to Dean Lowry.  I had floated the valves so bad that he couldn't even reuse the retainers, neve rmind the springs.  He had to throw away one head, it was so beat up.  He gave me a core and did the rebuild for very little money.  ....sure had fun with that motor.  After I upgraded to a bigger engine that became a loaner and about 4 or 5 other people got to use it for many more miles.

this is a great topic.ive always felt its all to easy to pick of the shelf parts without much thought and come up with a torquey monster.a 2276 can be built with every cam that a manufacturer makes and still be quick.its a different story at the smaller 87/88 x 69 motors.a cam in this size is much more critical to gain good driveability.the same goes for the heads.flowing standard valve sizes for optimum hp is an art but doable.it would be good for people to cut there teeth on these mouse motors not only for the talk down the pub but also to show what differences between carbs cams heads etc.personal acchievement is the reward for trying new things.you may surprise yourself ;) perhaps put down on this thread your smaller built motors for reference to others ;)

Bare bones is how I got my start... it was all I could afford.  After driving stock 36hp and 40hp cars for a few years, the move to 1600cc with an Engle 110 cam, flycut single port heads, lightened flywheel, S&S headers and Zenith two barrel carb was a real eye opener.

Thought you'd have some good feedback here, Mark, thank you.
While 48IDAs and magnetos and the related "required kit" are cool, they are in no way "mandatory" for a cool, fun hot rod VW. I've always openly dug the off the wall stuff, even if it wasn't super fast. I've always been more tilted towards the "sports car" side of things than the out and out drag car stuff, myself, and though they're ungodly slow, there is still something very cool about a stock Volkswagen. Sort of in a grandfather clock sort of way. I think, instead of revamping the entire deal with a pile of aftermarket stuff, an engine that uses alot of oem, or genuine, original stuff, and is only enhanced, and makes 125hp or so, would be very impressive. Like 67worshipper mentioned, you can't really go "wrong" building a 2276 with some Engle cam and CNC this and MSD that... but try it with the classic 88 x 69, and you've got to think before you start screwing stuff together.

I think 87 or 88 x 69, 8.5:1, stock heads wiith reworked ports, .450" x 252' @ .050", dual 2bbl Solexes with orig Knecht filters, big tube heater, all stock genuine cooling tin, 4-into-1 header, etc. Simple and strong.

Kinda what I'm doing with my 62 bug, Nothing radical but have fun with it.The older I get, The less spare time I have for working on something all the time. I'm just building something I can get out on the road and enjoy it.

Cool topic, Jim. I would build something like this: 1600 or 1641, SP heads, kadrons, stock cam or webcam 73??, 8.5-9.0 CR, stock appearing exhaust, german engine tin. But I would like to have this in a beck speedster. Silver or Strato silver with red interior. Someday....

Hey Jim, cool topic. The 1500 SP motor with dual kads, 010. exhaust & 1.25 rockers was a lot of fun to drive. Tons of low end troque where you need it on the street and it ran great with stock gears.

--louis

I ran a similar combo as Louis mentioned above, without the rockers.  Ran good for what it was. 

Then I "stepped up" to my 92x69 stocker.  I liked to call it a stocker because it was a late DP with VW cam, heads, VW ratio rockers, and 92s...kinda odd but I got it that way and just used it to get inside a VW engine myself.  Did the bearings, had the heads rebuilt, and transferred the Kads, 019, 1.5" merged with heat and dual muffs.  Big improvement over stock but nowhere near what you've got in mind Jim.  I would have loved a cam and bit more compression, but ran it as I got it.  Kept me almost entertained.

Here's one for ya... remember, I was just a 16 year old kid  ::)

Turn the wayback machine to 1973 or so... my first "HOT" engine  ;D: Started with a T3 1500S and with the assistance of a very handy neighbor we installed an H4 Howard cam (I think), HAND lightened the pistons & connecting rods, lightened and drilled the 6V 200mm flywheel, added an EMPI oil pump / filter, honed the cylinders, hand ported the SP heads, lapped the valves, added some used dual valve springs, milled the heads for high compression, ran a Holley 2bbl "Bugspray" with an EMPI intake manifold, S&S header complete with LOUD glasspack, 010 distributor, power pulley. I think the only new parts were rings, gasket set and a flywheel seal. That motor was such a blast to drive... it revved quick like a motorcycle, the thing loped at idle like a drag car (in part to the rich running Holley) and really ran quite respectable... um... until it dropped an exhaust valve... oh well, I got several months of HARD TEENAGE USE out of the thing.

I know the old 1500 was a junkyard engine, but it was a good learning experience using mostly VW parts.

~DR.

 

In the late 70's when I worked at FAT we did several 901 5 speed conversions. 80 hp and a Porsche gearbox was a memorable combination, something VW should have done.
Nowdays, maybe a 100hp, better brakes and a little chassis upgrade just to keep up with traffic would do the job.  :)

I like fast, scary, reliable cars. Is that okay also ?

the one/jim   awesome thread/topic as usual..

i like this,   this is also one of the reasons for the planned engine of mine (88x74)    i know and been told too many times, it would cost the same to do a 90.5x76 ( lol sure.. how many 1955s are out there? alot )   

and as everyone mentioned, thats easy and parts can be had left n right, 

for reasons i was never around in the 60s 70s and even 80s lol

i am doing the 88x74 , 

Sarge, im sure jim, and many others already fell and scratched their knees on the pavement at one point
i do wana fall and scratch my knees too..  so i can "feel" the fun,  the fun in going thru parts, making things work.. or making them not work LOL  i seriously think thats what makes the hobby unique  ,   the "wanting" to experience it,

come to think of it , Jim!  the 1979 brazil issue beetle (mine) needs rebuilding,  now im thinking
a sporty 88x69  should do?  aside from the 88x74  hehe

Or more correctly; Sure. But this thread is for us US people that prefer not-so-fast, mildly inimidating, very reliable cars

 ;)

crap im  not in the u.s  :(


 ;D

i have an 88x74 thread  :D


i have the following cams handy

engle w110 , engle w120 (i have a w100 but then again.. i myt use it as a display LOL)

yes sir fred/mark/fred LOL i am most def building the 88x74  for sure (just completing sum small parts)

i have a feeling though, that the 88x69 motor im doing will get built first,
for my other beetle, 79' fat brazilian haha

In my ragtop I have a 76x88 engine, 1849cc with Kadron 40s aftermarket cam can´t remember which one right now. But is a really nice engine. It was built in the 80s but seized so I fixed it. I think it is a Claudes buggies crank.

/Johan

cool beans!!

i have 2 sets of kadrons, prepped and set by Art thraen

one will go to the 88x74
 the other will go to the 88x69

hehehehe

keep us updated on your build up with plenty of pics please ;)

I hope Russel will chime in on this one, but it struck me that when he came to EBI1 (many moons ago now  :P) he had a whole truck full of cars, so he could have picked the Randy Gates car, the chop top (ex Keiths), or a racecar if he would have liked to. but he opted to drive around to his hotel and cruisenight in Arnies 67 with a 1641, dual dells, w110,... engine and i had to ask him why not a different car and he said that this was the most fun car he had driven in a while. i think fun is indeed key in this topic.

OK,

I told you about my "junkyard" motor... about a year or so later (around '74-75) I built this: 69X88 stock crank, aluminum flywheel, Howard H2 or H4 camshaft, dual port heads (ported by me), stock valves, dual valve springs, heads milled for high compression, power pulley, 1 5/8" merge header, 010, and the crowning glory... Berg Special 42's.

In my stock bodied, stock geared '64 Sunroof, with that motor I was able to beat the school rich kid's 1969 Z-28 Camaro in a drag race... felt pretty good, back then VW's were the the butt of many jokes.

Lastly, around '77-78 my '59 Ghia was powered by the same motor as above with exception of replacing the 88's with 90's, milling the first fin off the heads, changing to an Engle 120, and 48 IDA's... that stock bodied Ghia, on race gas with close ratio transmission ran a best of 14.16 at about 95 mph in the quarter... I was happy with that!


~DR.
   

anyone got pics of arnies motor? this thread is great and its stirred alot of people :D dave that was a quick ghia then for sure :o

Finaly an engine thread for me :D

Love to read about all the nice engine combinations everybody have in there cars, beacuse it´s one of the main recipes for a callooker.

But theres no fonds for any enginebuild right now with three kids in school. The Stock 1600dp will have to give me the fun ride for the buck.
Always wanted a "callokoker" since i was about 12, but it took me 28 years before it happened. A powerfull engine would sit right on i the back, but as one gets older there´s more to life so there will probably never be the "big cc, always wanted engine" after all.

Thats why this thread fits in my budget. Get the best out of the stocker and still having fun driving my "callooker" :)

My very first self built motor was a bit of a mutt. I was 17 years old, and had done as much as pull a motor on my own, so the thought of seeing the inner workings of my car's motor was like meeting God or something. Anyway, the parts began to pile up under my bed for a 1914, but the pile stopped when my pizza job showed its shortcomings, financially, so it got backed down to an 87 x 69, yet it was "turned up to 11." Months earlier I was driving a 1641 dual port, stock as stock can be, except for single 36DRLA and 009 and an S&S Header. Time and time again, other VW guys would blow my doors off. I got tired of being the momma's boy, so started collecting stuff in secret. At the same time, I began to get fascinated by small displacement old Porsche race stuff... still haven't got rid of that sickness.
Anyway, aftter months of learning about pinning main bearings, valvetrain geometry, cam gear to oil pump clearance...etc, my motor was in my car:
87mm cast Cimas
.040" align bored/thrust cut AE case
Rimco c/w 69mm crank
stock rods
12lb "black oxide" flywheel (Buggy House sold them way back, not sure where they got them, but they looked cool)
Engle VZ25 .470" x 288
out of the box 041 heads, flycut (not sure how much), 9:1
CB filter pump
Bugpack super sucker oil pickup
009
36 DRLA in the middle
S&S header

It idled horribly, @ 1500rpm. It was gargly and dim-witted under 4000rpm, but after that it would snap to attention and just sing. The 36mm carb always seemed like overkill on the previous engine, but now it gasped and growled and barked on this motor (later it was replaced with dual 36DRLAs). The exhaust note was super harsh and strident, once the thing cleared its throat... my neighbor hated me. I had this old VHS of a guy going around Riverside in an old 904 4 cam, and you could hear him pussy footing it thru the turns, but then lay into it once on the straights, and that Porsche would howl, and I think watching that video made my VW motor so much more fun... the Porsche sounded cranky and flat under its powerband, much like my car. But once it all came together, it would just shoot to 7000.
I drove this thing everywhere, for a few years. With the dual 36's, it behaved. It would idle @ 1000, and the power came on more progressively, and revved higher too. Once it sprouted the dual carbs, it was a car that could win the ocassional dumb ass street race in Pleasanton. My favorite "kill" was a stepside Chevy pickup w/ a 350 overbore, Performer manifold and Flowmasters. The guy couldn't believe it and all his ridiculing in high school about driving a VW developed into a friendship.
I can't say it was the fastest, or the most reliable, but it did things so differently than all the big motors that's been in my car since 1990, and really it was a ton of fun. I guess it showed me the door to bigger and better (?) things.
I built a similar setup for my ex's Super Beetle about 10 years ago, but despite being older and wiser, it came out a bit of a dud. I think it needed more cam.

My first engine in my´61 was a 1600 dualport with kadrons, 009 and 4-1 header and single quiet pack, not bad on old 4.37:1 box. My current engine in my 181 is a 1500 singleport with kadrons on steel manifolds, 010 distributor and Bugpack header with single muffler, also very nice, cool engine for driving around town. Won´t beat many cars, but can give them first surprise on traffic lights.

My intentions were to build 1835 engine on a singleport 1600 industrial case, with thickwals, massaged singleport heads, with 1.4 rockers and sime mild cam, bumped up compression to 8.5:1, lightened flywheel, Kadrons with old style air cleaners and berg linkage, 019 distributor and some vintage exhaust, but was talked to my 2276 engine kitchenbuild instead:-)

hey bugsy your still having fun though! you could do changes as and when funds allow.could still be smiles per miles with a bit of thought ;)

Yep!

That was the intention. Would be fun to get one thing after another just to get the feeling of what every litle change would do.

Like the change from 1300 to "big bore" 1600 with a header did. ;D

the stock 13-15-1600's are so "under-tuned"... I think that's why they make such a startling jump in power with a little love. Still cheap to do if you're resourceful. I know hot rodding the 36hp can be fun, but they break, and are so expensive now. You can spend thousands of dollars and end up with a 37hp.

Yep,

Just built a DP 1776, Engle 100, single Zenith, 009, header, your basic "budget motor" for my Son's Baja and it runs great!

~DR.

whats the chances of getting 80/90 hp for say a 1000 pounds or equivalent in dollars? stock rods n crank all balanced with the clutch.possibly twin carbs,home ported heads,a mild cam of choice,bolt together rocker shafts,and a few odds n ends ;D

Deano's 1700 comes to mind, from the blue '67....   Dean, what was it like to drive, when compared to the typical 2276 today?

Yep, that's me. If I only could follow my own advise! :D I do believe it is the smart thing to do, though. Why build a 1776 when a 1915 costs the same? When I built/drove my 1776 T3 engine, one of the first thoughts in my mind was, "I wonder how a 1915 would have been?" ::) That's why AssHull's car is being built with a 1915, it's by far the best bang for the buck. And a torquer 1915 (Engle 100, Kadrons) is being built for my dads bug. Every engine combination rolling around in my brain though is far from the norm... A slip in 1679cc for the GTV (I'll do a full rebuild, you guys win :P), an 1835cc or ideally a 1968cc for my '67 long term project, a "clone" of my old 1600 that ran 14's, (THAT was a fun & simple engine!) and many more. I really seem to gravitate towards the sub 2 liter motors that are willing to rev a little. And that have odd ball vintage parts :)

Oh, YES! Those are some very cool components for a small engine... especially the Berg 42 carbs. LOVE those. Too bad they're a pain to deal with in a full bodied sedan, unless you have the doors installed. Hicken, are you reading this?

 ;D

will do!! most def!

i do have to buy a digicam though asap (making it obvious every penny goes to the car hahahha)

1st - 1679cc kadron motor
2nd- 1800cc Kadron motor

thats the plan, and in order hehe

My very first motor was a 1500cc that was built FOR me, just getting into VW's. Jack A. at Yankee Beetle Workshop in Montebello had built it for me back in 74'-75' not sure. Motor had SP heads, Zenith carb, 010 dis., I believe it also had a cam, not sure of grind, and stock header/muffler with a  ZOOM TUBE. This motor started it all for me..... ;D

My motor in my car right now is a 2303cc W/E120 cam, Jeff Deham 42X37 heads running IDA's.

My motor in the works is another 2303cc W/86C cam, with Fred Simpson (Performance Tech) heads, 46X36. Still waiting for them. :-[ IDA's, A1 Muffler, MSD Ign. My thing is never build a motor the same, always try to go bigger or with more power than the one before. So far I have done that.  :) It's all fun.......... ;D Technolgy has changed so much through the years.

Drove Russ Welch's car late last week, just on a slow, short jaunt across San Gabriel area. This car is really, exactly, what a hotrod should be. Nothing beyond a bad tempered motor that wants no part of doing anything except kicking ass and staying on the high side of 5000 revs, a noisy cabin, a hard ride and that's it. Don't kid yourself. even the most hard core VW guy wouldn't/couldn't drive it everyday, it would rip you to shreds. But to jump in when the time's right, let the oil come up to temp, rumble and cough over to the bad side of town... and let it off its leash. That's precisely what a full-on real Cal Look car is supposed to do and that's it.

Jim

I'm looking at building one of the mileage motors like in HotVWs. Just need the forged 85.5. Stockish heads diy fluff and buff 110 cam 010 dizzy. 40 Dells, what ever big header I can score. Currently running the Dells on a 1600.

Who ended up with his car anyways? Just curious.....

This thread makes me so proud of my little 1641 SP. Some very slight head work, what I believe is an Engle 100 cam, 1.25 rockers, balanced crank, 1 3/8inch header, Kadrons, and a 009 distributor gets my full bodied and interior'd '67 into the mid 18's at 6000 feet altitude, but is still good enough for a fun/slightly snotty daily driver. She'll hold 75 on the highway with a .82 bus 4th gear too, not too shabby for a motor my dad initially put together 24 years ago!

This is a great thread! You guys got me thinking......I have a pile of parts in my garage waiting for an engine like this. I just accumulated them, got the parts for not much money when I had not much money to spare.....Bug spray carb with offenhauser manifold, 009 distributor, used 90.5 pistons and cyls, stock standard / standard 69mm vw crank, berg 1 3/8 header  with single quiet pack, set of rebuilt stock vw rods, set of new vw dual port heads with 3 angle valve job, achiever pulley, new set of stock plug wires, blue coil, uncut vw dual relief case...ect   Before I built my 2110 I was going to build just a mild motor so I searched high and low for good cheap parts. Then I gave up and just saved for the NICE stuff and built the 2110....Now if I just have to find some damn TIME to put it together and find a cheap decent car to put the engine in.....

That sounds like a fun little motor, but should be really nice with a pair of 36 Dells. It's basically the 1776 version of my old 1584, which was great fun!

Sounds like THE plan! Oh, but stick a cam in it, ESPECIALLY when running a centremount, and even more so with the Holley.
Something with about 250* - 260* @ .050" will make it lump and snort at idle, use straight cuts too, then add a heap of compression.

It won't idle well, it'll be anti-social and cough and fart in traffic, and have bugger-all under 3000. Putting 2 nicely tuned Webers on it will make it quite nice and civil, but where's the fun in that?  ;D
Get the revs past 4000 with your foot in, and like Jim said it will snarl and sing it's way past 6000 ready for the next gear.
Repeat.
Repeat.


My special order cam for my economy motor is beautiful and smooth, really efficient, excellent on fuel.........and about as boring as batshit.
I'm going to get the nice people at Schneider Cams to make me another one just like the recipe above.
 8)

I bought my first car at 20 years old... a 1971 1300 DP semi auto. Drove it around for a while untill the dutch guys from keversite.nl did a track day. From then on I hated the semi auto en felt the need for more power. Money was no where to be found being a student and the first european bugin was coming fast. I tore down the 1300 to make it a bit faster only to be told that the rebuilding parts alone where out of my reach.
Luckaly I had a 1200 1970's engine laying around and I read this article in a french magazine about putting some 1300 DP heads on it.
I had the heads from the 1300 rebuilt and bored for around 8,5 CR and put them on the 1200, adapted the tinware to the doghouse kind and got it running a 009 and a set of 36DRLA carbs I bought for a case of beer and rebuild myself.
That engine was a lot of fun.
And because the DP look of it and the way I drove it nobody believed it was a 1192 cc engine.

Later I put a turbo on that same engine and drove A 15,25 in a stripped full steel bug.

On day I will build me that engine again, but then with all tricks I have learned since and probably in type 3 discuise for my fastback

Hmm, well, 20 years ago a hopped up 90-100 hp 1600 was reasonably fast and an ok fun factor today I feel that if a beetle should be really fun it needs to be in the 130 - 170 hp range.
That said I still do a lot of stocker plus and sub 130 hp engines. In fact that´s most of what I do. And I can easily find the fun factor with these engines too. Everything at the right time.
But it is ALWAYS fun to come with an underdog of an engine and surprise the big cc guys on the turn pike or on the freeway  ;D

T

I just stumbled upon this old topic, got me thinkering...  It seems that almost every "basic build" starts with a 1600 or 1641 base.  Look at the Swedish 1600 challenge that's going on right now, great stuff! 
Now, some of the engines built right there are next level stuff but to shift it back to the basic "sweet 16" or in Europe "sweet 18"  :) engine: why does almost every build start with the 1600 base?

Is it because the 1300 DP isn't that common in the States?  The cost of a 1600 cilinder/piston kit is the same as a 1300 or 1500 kit?  Does that lousy 300cc really make the big difference in drivability? Or will the 300cc's be more forgiving if the balance of the whole engine isn't "right"?  Or the old bigger is better kinda way of thinking, there is no replacement for displacement?

 Look at the alfa romeo 105 series nord engines, the base model: a 1300 engine.  Also a 60's, 70's design.  It produces 90hp, makes plenty RPM, great sound.  If you can create that package in a beetle which is a much lighter car then the alfa then you got yourself a sweet vintage balanced ride, no? 
Okay, I'm talking about a car that can do everything, working heater, great mileage, long runs, short runs, a quick fun shopping run, fun ride on sunday, not too loud, not too harsh, family car that "hauls ass" with NO compromises on a budget  Not your white knuckle 2276 only good for straights kinda ride...

My guess would be that the 1300 doesn't allow as much room for unshrouding the valves, even if they're small ones to really get it to breathe, as well as how the basic design of the VW engine is so heavily biased towards reliability and efficiency. I've had similar thoughts about those old Alfas with the little 1300cc motors just screaming away, while the VW 1300 was a tractor motor by comparison. I suppose with enough work you could probably get one to run almost as well as a hotrod 1600, but for the same reason we always wonder how it would run if it was a 1915 instead of a 1776, you'll probably find yourself wondering how it would have run if you'd sprung for the bigger P&Ls too. Ah, the curse of the modular engines...

Although I have a 2276 in my '68, I couldn't bring myself to part with the 1584cc VEGE recon motor that it replaced. I bought the VEGE in about 1997 and it's been pampered. I think it'll be the perfect base for a small 'fun' motor. One day. Nothing too major - I want to stick with 1584cc for nothing other than stubbornness, but as per some of the previous posts just add some 'get up and go'.
My thoughts were a hike in compression (happy to run on 98 octane fuel), balancing, lightening, something like a w120 cam, 2x DRLA36, carbs, a bit of head work, 009 dizzy and 1.5" exhaust. Shouldn't break the bank as I've got the base motor and carbs already, but but if I mate it all to a stock 1200 box it'll be plenry for some sub 75mph fun. I keep buying bits for this and I did have a 1200 g/box, then keep parting with them as the '68 always needs 'something'. My mrs suggested I should sell the 2276 to fund the build of the 1584!!!   :o

Correct! The 1300 dual-port was never offered on any new engine in the USA! The 1300 was only installed in the Type 1 (Beetle, Ghia) for the 1966 model year, and that was the single-port head with 33 x 30 mm valves. For '67 Type 1, VW went to the 1500 single-port engine with the 35 x 32 mm valves, 1600 single-port for '70 and 1600 dual-port for '71 with the 35 x 32 mm valves. Those were the standard equipment engines. Unlike most European countries, the USA only received the most powerful of any engine choice. 

Hers a good combo
1776
Eurorace H Grind
40 dells
Standard heads and valve size
Standard ratio rockers
12.5 fly
009
GT gear box

Great thread.. Making me reminisce about my younger days of adding parts as the money came.

But,
Um,
a 1641 or 1679 with a fly-cut, home port job and a W120 isn't going to be making 125hp.
More like 75..  :P
 

How these kinds of motors come about in my world is the "heater box motor".
Once you're running stock heater boxes, big valves and stroker cranks go out the window.
All kinds of things become just a waste..
Building a motor around stock heater boxes becomes a fun challenge.
Gives me a chance to use the old German parts we have around.

But,
It's hard to go back,
Once you get used to a big built motor.

Find myself with my foot through the boards trying to talk it into giving more.
"come on Betsy, give me some more here, sweetheart, I need around this truck"..
 :D

A 120 cam needs a cc of at least 1835

My 1776cc disagrees with you  ;D

 ;D Lot's of options to work with heater boxes these days.  You have the "cheap" "big" heater boxes which are 35mm, should be enough for a "hot 1600" with 100HP and CSP even have bigger different tubing size heater boxes to work with their exhaust range if you really want to go with a stroker crank and 44 valves.

But, I follow you in some sort of way: it's gonna be hard to push a 1600 with a flycut and some home ported heads to a healthy 125HP.  But it's certainly doable.  What's the trick?