more power wanted for aan engine

100turbo c · 30-01-09, 05:31 PM

i want more power out of my s4 , apart from chipping or remapping any othern good options ? cheers

martinjs · 30-01-09, 10:06 PM

How much power do you want?

Isimmo · 30-01-09, 10:21 PM

Quote:

Originally Posted by martinjs

How much power do you want?

That's a good question, the sky's the limit with a 20vT...

A remap and a bigger intercooler will see you knocking on the door of 300 (290ish). But, and this is a big But...

It's got to be spot on healthy first... Anything that resembles a weakness... sensors not working properly, boost leaks (a classic nightmare fault), fuel starvation at full boost etc will all become much bigger issues when upping the boost...

A kkk24k is good for circa 300bhp, anything after that is a turbo change... Conventional wisdom says 350 for standard rods, (achieved with RS2 inlet/exhaust etc) but I've seen 400 running standard bottom ends... Then, after the 'scat' rods and modified pistons rebuild on the bottom end and custom remap it's just a case of modified inlet, exhaust, turbo, intercooler and fuel/mixture control... All the way to the 1000bhp blocks...

Isimmo · 30-01-09, 10:25 PM

Oh, I forgot, also a huge bank account, 20vT's are cheap hp in name only...

Yes, 285bhp can come cheap, but the jump to 315bhp/350bhp is expensive... The next 'expensive' jump is over the 380/400bhp (bottom end) hurdle.

4v6 · 30-01-09, 10:29 PM

Keeping within stock rev limits will go a long way towards keeping it all reliable.

Javed from 034 motorsport ran a 10valver -unopened engine btw, for two years in race trim at outputs of 500bhp ish before he lost a valve head which destroyed the motor.
20valvers got more potential for sure so i dont see 400bhp being beyond std components if detonation is avoided and fuelling and coolngs kept under control.
I certainly hope to see 400 bhp and then some on the 20 vt i have...

30-01-09, 10:06 PM	#2
martinjs Grown up member Classic Audi Club Member Join Date: Oct 2007 Location: Bedfordshire/Yorkshire Posts: 149	How much power do you want? __________________ 1992 UrS4

30-01-09, 10:25 PM	#4
Isimmo Super Moderator Classic Audi Club Member Join Date: Jul 2007 Location: Sissix-by-the-sea Posts: 15,218	Oh, I forgot, also a huge bank account, 20vT's are cheap hp in name only... Yes, 285bhp can come cheap, but the jump to 315bhp/350bhp is expensive... The next 'expensive' jump is over the 380/400bhp (bottom end) hurdle. __________________ 1985 WR quattro, 1985 20vT RallyRep, 1993 MTM ABY S2 Avant. 2010 S3 Sportback.

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30-01-09, 10:29 PM	#5
4v6 Ex Member Classic Audi Club Member Join Date: Dec 2007 Posts: 5,565	Keeping within stock rev limits will go a long way towards keeping it all reliable. Javed from 034 motorsport ran a 10valver -unopened engine btw, for two years in race trim at outputs of 500bhp ish before he lost a valve head which destroyed the motor. 20valvers got more potential for sure so i dont see 400bhp being beyond std components if detonation is avoided and fuelling and coolngs kept under control. I certainly hope to see 400 bhp and then some on the 20 vt i have...