The Cal-look Lounge

hey. i bought a 2332 motor with a fk10 cam in. it is for a bus and i like the original look. my thoughts was to put on a single carburator and modify original airfilter and tin and i want heat in the car.

any one run a single 48ida with that wild cam or do i have to step down on the cam.

or do i have to run 2.

 :-\ :-\ :-\

The engine will run but it will idle terribly, get awful mileage, and make a lot less power.

Just try it and tune it.
Then you know if it wil work.
Seen a lot single carb engines in autocros
Some ran like shit others verry smooth
Its al about the rigth tunning.

Gr henri.

I know its not 100% comparable but I run a single throttle body in middle on my turbo engine with more cam than that and off boost it cruises around fine, getting a single carb tuned right will be more difficult but a big single barrel should be able to work with a plenum under it, is it worth the effort though?

cheers Richie

I've run a small Solex on a smaller cc engine with a bigger cam than that..........and it was HUGE fun!  :D Spits and snarls and lumps and farts, then for about 2000rpm all hell broke loose, hahaha!

A single 2BBL makes a big difference to both idle and driveability over a single, makes it almost nice, an engine that big could use a plenum like Ritchie said I rekn too, but the choice of carb to make tuning nice and easy and forgiving probably won't have a "W" at the start of the name (can I say H0ll3y without getting excommunicated?).

Centremounts with a decent cam don't have to be terrible at everything if you set it up right.

It will run very hot

A high vacuum at idle will make the engine easier to tune for idle.
Mileage might be lower but at a bare minimum.
Lott less power? O Yes!

RhoadsVW writes:
It will run very hot.

Please give me a good reason why, because that sounds just like a guess.

OOps, I read again and I miss that it was a single 48.  Was thinking a smaller carb. 

i want it to be as original and oldschool as possible. most likely to fit in a bus or my 71 carbrio. i was thinking single 48 idf or single ida.

know fat performance has used single cap on there dune engine might worth asking greg.

You will do best with single 45 Dellorto, heated manifold and vaccuum dizzy

I don't see how a single two barrel is either original or old school?
In a bus application it will require a very short air filter, not good.
Comparing your engine to a Fat off road race engine is totally apples to oranges. Massively different application and they have class rules to adhere to.
The sensible choice would be a pair of 48 IDF's, but if we were sensible we would all be driving a Honda :D

Not as big engine, but some ideas to get from this maybe.


http://www.youtube.com/watch?v=Stjxa_6bszI

 ::)

I remember tuning a WW Stromberg (small 2-BBL) on a VW in the late 70s here in Oz, and how many pics do you see of Bugsprays and Zenith carbs from "back in the day"?
That's old-school enough for me, we still even had B&W TV out here!  :D

My favourite carbs for this type of application are Holley 7448/4412, WW Stromberg, Carter BBD (as long as the piston chambers aren't stuffed), but my all-time favourite is the Bendix-Stromberg single barrel.
All of these carbs have excellent transition ccts that can supply heaps, cruise on mains economically, and have a power valve cct which means very simple part-throttle tuning. These carbs are all designed to happily run a big engine through small diameter long manifold runners with great throttle response and cruise manners, while pushing big un-aero lumps of cast iron (sound familiar?). Put a stock OEM 70s-type air cleaner assembly on it, complete with snorkel, and it would definitely have "stock looking" appearance to anyone but a VW person.

I'll warn you though, you won't get any street cred whatsoever at the next get-together, no matter how nicely it drives.........
 ;)

PS: the cam will suit torquey highway cruising perfectly with stock rockers.

Sure a Zenith, etc is "old school", but that doesn't mean all single two barrel carbs are. IDF/DRLA are far too new, and a single IDA was not a common sight.
I still say a 2.3L single carb with that large of a cam will not have good manners, will net bad mileage, and will leave a lot of power on the table compared to a set of duals. If you're ok with that, do it.

How about gutting a stock carb and using it as a throttle body? Or even one step further, hide a turbo in the big oil bath air cleaner and blow through a single in the stock location?

I have a single IDA manifold if you want to go that route Peter :)  All old school looking and chromed ;)

cheers Richie

A lot less cam and less compression, it will be possible.

/Rolf

If have a 2276cc Engine with Single Carb in my Oval, it works  ;)

Here is the link:

http://jpsaircooled.blogspot.ch/2015/09/jps-single-carburetor-rd-project.html

and the upgrade with 39 PICT-3

http://jpsaircooled.blogspot.ch/2015/09/limbach-l2000-assembly-and-upgrade-jps.html

Have 122hp at 4700rpm and 210Nm at 2600rpm torque


Regards,
Pit

Yeah, 120 hp 200 Nm from a 2275 sgl. carb. (Modified 34 mm Solex) split duration split lift cam, but not even close to the FK10. Idles like a stock engine.

A sgl. 44IDF or 45 Dell could work OK with the right manifold and the right work to the end pieces.
T

are these modifications also possible on a 34PICT5 from a vanagon?
Got a high compression 1.9 in the makings.

is it possible to use a 36/40 solex from a Type 4 dual carb set as a single in the middle? i took a look, you have to modify the linkage, but the rest seems to work with an adapter to the maniflold. it even has a choke and the vacuum port

For a while in the late 1980s, some of the PRA Pro Stock guys tried running a single four-barrel Holley on a fabricated manifold. It worked, but as soon as the big-bore IDAs became commonplace, they all went back to dual carbs.

i rember a plenum with twin 40 dells they claimed made more hp than IDAs

Tunnel rams make more power than stacks, and a larger overall power as well.

Idle like crap, but that's 1/2 the appeal.
 8)

Hallo
Typ 1 engine 94-78 with 39 PICT 3 A1Header and 123 USB Ignition,

2.165 typ 1 and 39 PICT Carb, 40-35,5 Valves, SLR Cam, A1 Header, 123 USB Ignition,

Some things are not for me to understand.

Login , and you can See the Dynotest and Pictures,
Regards,
Peter

This is how my Engine look now:

 I have changed the exhaust from CSP supercomp to CSP Wasp Stage 1, the improvement in torque was about 8-10Nm the Sound of the engine with this exhaust is even more impressive.
The biggest improvemnt was the Change from 37 PICT-3 to 39 PCIT-3, better idle and great throttle response.

On Malec`s engine and mine you can see that this configuration works nice!

BTW: Congratulation Malec for your nice build!

If you don't mind me asking, what diameter venturi are you using with the 37 or 39 throttle plates?
I have a 36.5PICT with a 30mm venturi, so was curious about the balance.

PS: the stack looks great !
 8)

Hi Modnrod,

The venturi on the 37 was 31mm on the 39 no venturi the inside of the carb body was reshaped and is "the venturi" so its approx. 34mm
If you interessed Guido Wensing from Germany made both of them.

Oldtimer Wensing 39 PCIT-3 in Google and you have it.

The Stack is a reshaped 51mm from Jenvey

Cheers Pit

About the same ratio then.
thanks Pit.

i ran a 34 pict 3 with no venturi, so 34mm. on my 2110 with an 86b and 9.3 to one. that would ping at WOT with AFRs in the 12's, i had to retard it to about 24/22 degrees if i recalls to make it okay but would still ping on longer drives :(

Hi Andy,

86b with a single 34-37-39 PICT-3 doesn`t work
I have build several single carb engine and that cam is to much

with AFR in 12`s and Ping? ???

I ran 12.8-13.2  at WOT no ping, I have had a ping but at low rpms because of the to small accerlation pump.

But you can compensate this with the 1-2-3- Tune ;D

You most likely tried to run on 87 octane  ;D

Does the 123 tune also "compensate" for idle and dwell as the older ones do?

yeah i didn't understand it, premium fuel but still had to be careful. think i ended up on about 25 degree WOT (via megasquirt)

now i'm fuel injected TBI's its a total non issue,

it ran and i did some long trips on it, but it wasn't optimal

Cool :)

@Torben

with the 1-2-3 tune I did my own ignition curve.

You can set the Ignition Point on the rpm chart where you want, on my engine was it only critical when I made a WOT pull from 1500rpm up
In the effect of the Little volume in the acceleration pump it only spray in once and than it get lean between approx. 2500-3500 rpm
This was compansate with a ignition curve works perfect

BR
Pit

Bit of a thread jack, but I have a 1776 with an Engle 110 cam, ~9.0:1 comp, and a Solex 30PIC (the old school manual choke like a 28pic). Do you guys think this could work or should I try bumping up to a 34pict or single 36drla?

A stock carb needs a VERY mild cam to work well, the 110 is too much. Dual 36's would be best, but not in tune with this thread ::)

who sells the large throttle plates?