flip side

[RMinOZ]

Howdy,

Long time reader, first time poster

There is far tooo much SBF, SBC on here to be healthy.

Therefore I post this piece of the "web" for you to Ponder/Augment.

Hope it is enlightening, as such.

MKII Trying to reach the 1000hp target - VWFixx.com Forums



Hi

Sorry for the delay for my vw project. I have very very little time to finish it.
I am busy with customers projects.
Recently i finish a race car with cosworth NA engine. I will tell u about this project so as to see in action the theories that i told u to my previus posts.
The engine is ford cosworth NA 2ltr 16v the stock form (90.8mm x 77mm).
The customer wants the maximum power of this engine no matter the cost.
The car is race car so we must stay until 1999cc engine displacement to stay in the regulations.
So the only way as i told u before is to make it revs very very high. I design the engine configuration and what parts would i use. After when finish the theory that i thought i start gothering the parts and some of them i make it special order.
The result of the project is: 412hp at 11700rpms and 28.1kgr of torque at 9750rpms and revlimit is 12600rpms.
Its world record of an engine below 2000cc NA.

Some specs: 92mm piston with 72mm stroke, custom length aluminum rods, supertech special order pistons,
custom design 4340 billet crank, nicasil sleeves, yellow titanium valves, custom berilium seats, custom billet cams, compression ratio 17,5:1, Haltech e8 managment system. 60mm throtlle bodies, and 90mm exsaust pipe.

I manage to use the wave sound efect perfect. So i had 1.3bar extra pressure at the intake port and 2.4bar at the exsaust port.

Here is the dynoplot and some pics.

[automotivebreath]

RMinOZ,
We talk of the push rod, wedge head V8 because for some of us it's all we
know. Your Cosworth is a different breed, very enlightening. Many of us
would never dream of 11700 RPMs!

Extremely impressive to say the least;

Originally Posted by RMinOZ

"The result of the project is: 412hp at 11700rpms and 28.1kgr of torque
at 9750rpms and revlimit is 12600rpms. Its world record of an engine
below 2000cc NA"

Could you tell me more about the process used to determine intake runner
and exhaust tube length, RPM and harmonic to which they are tuned? I like
what I see of the "flip side"

[rookie]

My only complaint is that it is not in the engine tech section under engine combos.
I think this is an engine everyone needs to take a look at, we can learn a lot if we are willing to appreciate what goes into different combos.

If I wish to be a good engine builder, I had better know what I’m competing against, because if I don’t I want be competing.

My questions and comments fall right in line with automotivebreath.

A 12600rpm redline tach, would have to be the most beautiful tachometer ever made.

On you comment about 1.3 bar intake and 2.4 bar exhaust. Are you actually measuring this wile the engine is at speed and if so could you share how or is this just calculated.