other ways to make the hp?

[Jim Ratto]

It's no secret that the usual recipe for powerful motor means bigger cc's (or cm3 for you guys overseas ), re-worked heads to flow more air, higher CR, longer cam timing, ratio rockers, fat carburetors and big headers. What about going beyond this stuff? What about reducing friction among ring to cylinder wall? Windage losses inside case? Drag on oil pump from thick cold oil? Valve timing errors? Parasitic losses due to fan...etc? Getting valvetrain geometry as close to theoretically perfect to reduce friction? Not over-springing the motor?

I hope this isn't too much of a "gearhead" type of post for the Lounge....because I really enjoy the feel and vibe of talk here, and hope it continues on just as it is.....just wondering what kind of tricks you guys perform on your motors. There's been a few (my new 94 x 78 included) that I did my best to not compromise much on, probably the best was the 2276 that made 213hp at Heads Up....it took about 5 months to get it "just right." Everything from getting cam timing "right on" (what a PITA with a cam that was ground more than a few degrees off) to getting every cylinder deck exactly same, to making separate pushrods for intake and exhaust to keep geometry on, and to completely profiling the interior of the case to reduce windage losses.
what other stuff have you guys done to squeeze more practical power out of them?

[Rune]

Interesting post.. I have so much to learn. Hope you get some good replys on this one..

[Frank LUX]

Keep the Valve Train as light as possible...

Use light Lifters like the Udo becker 60Gr onces....on special VW Style Springs...

Frank

[Martin Greaves]

Sorry got to say it but just put a turbo on it and done with it.

[Cornpanzer]

Sorry got to say it but just put a turbo on it and done with it.

I second this! 

[Jordy/DVK]

 It's not quite about more HP, but have you thought about the length of your inlet manifolds?
 They change the point where you have your peak Nm, because of the pulse charge effect.
 It can be used to move your peak Nm to create a flatter curve for example...

 Also with stiffening your chassis and suspension you will gain some free HP, because of decreased torsion/flex in those parts.

 Also a motormanagement system and injection will give more HP and running rich on lambda=0,85 will give you free HP...

 But I think you metioned most of the tricks in your first post...

[alfie the monster]

Sorry got to say it but just put a turbo on it and done with it.

For a man with as little hair as me, you have an obsession with hair dryers Martin 

[Jon]

There are many smal things that can be done within the engine, but they usualy result in "more" of something.
The easiest way to free up horsepower is to use syntetic oil both in the gearbox and in the engine.

[Roman]

I have learned a lot from JPM during the last year but most of it is unofficial. Exhaust tuning is something that is often forgotten and I know JPM:s own pump gas 1914 made 243 hp and he picked up 10 hp from last years configuraiton just on the exhaust.

[Tobi/DFL]

By chosing an oil pump that is just (!) big enough for the engine´s needs you can have another up to 1-2% gain in horsepower over an oversized oil pump!

[Jon]

I'm going to explore what Jordy is mentioning with adjusting the length of the runner on my "new" engine. At a certain rpm the pulses in the intake "ramsharge"s the cylinder, so you get a "boosted" situation. The lengths are usually designed to "help" the engine in places where the curves dips, but if you like you can have it anywhere you please... if you want it high up in revs you get SUPER short intakes... at least when using IDAs.

[Alan Uyeno]

1)IF more attetion is made to the intake manifolds there is untapped hp there. Entry angles may help a/f charge delivery.

2)Valve jobs are not created equal. Potentially you can have identical cnc heads with 2 different style valve jobs and one set can make more HP than the other.

3)Although not documented there is some hp gains attainable with the Singh's groove.

4)Ceramic coating the exhaust ports may help in the quest to make more HP.

5)Probably the most effective bang for you buck is to buy an a/f wideband meter.

6)Selecting the least amount of octane before you detonate/ping is also a HP maker.

7)I think most importantly crying once and buying the killer port/polish  job. Thats the deal maker or breaker.

[Jordy/DVK]

 Just a weird idea.. but has anyone ever tried to make a run without oil in their gearbox? It's just 412m?

[Martin Greaves]

Sorry got to say it but just put a turbo on it and done with it.

For a man with as little hair as me, you have an obsession with hair dryers Martin 

That because all the fast street cars have turbos on. Now wait for Roman to come on here and tell me i'm wrong.

[ugly duckling]

gold 65 turbo how are ya. you know i have had numerios NA and TURBOS engines that ive biult my self from the heads to the exhast. turboes are i will agree incredibly formes of hp and torqe no doubght. but its still a form of forse feeding wich is fine and dandy. at the curent moment im a NA guy once agian and im glad that i am. becase i feel its a lot more of a chalenge and acomplishment when you do hit that magic #. its good to have a open mind about things. you know i thought i would never go back to NA. but her i am once again and i love it. what im trying to say i guess is do what ever puts a  on you face and have fun doing it.  i hope i dident rob your post there jim. my two bits. UD.

[Roman]

Sorry got to say it but just put a turbo on it and done with it.

For a man with as little hair as me, you have an obsession with hair dryers Martin 

That because all the fast street cars have turbos on. Now wait for Roman to come on here and tell me i'm wrong.

Last year in Norway at SCC the turbo cars were slower than my N/A bug. Including Riche Webbs and the all out race cars!
Hair dryers are for girls!

[Frank LUX]

Sorry got to say it but just put a turbo on it and done with it.

For a man with as little hair as me, you have an obsession with hair dryers Martin 

That because all the fast street cars have turbos on. Now wait for Roman to come on here and tell me i'm wrong.

Last year in Norway at SCC the turbo cars were slower than my N/A bug. Including Riche Webbs and the all out race cars!
Hair dryers are for girls!

Sorry My English Friends...

 

Richie has long Hair, so for me I can understand him using a Hairdryer, but you Boom Boom....

Frank

[christophe]

3)Although not documented there is some hp gains attainable with the Singh's groove.

Excuse me but what's the Singh's groove?

[Jordy/DVK]

3)Although not documented there is some hp gains attainable with the Singh's groove.

Excuse me but what's the Singh's groove?

 >>>> http://forums.bimmerforums.com/forum/showthread.php?t=684016&referrerid=56200
 

[Martin Greaves]

That it i can not take it any more stop picking on me.

I had a bad day took my white 67 to the track to day and broke the gear box.

Any way guys back to this Topic other ways to make the hp.

[christophe]

3)Although not documented there is some hp gains attainable with the Singh's groove.

Excuse me but what's the Singh's groove?

 >>>> http://forums.bimmerforums.com/forum/showthread.php?t=684016&referrerid=56200
 

Ok,thank you