fourside

Hello,

Can anyone tell me if 300whp is reliable (or at least not a ton LESS reliable than stock) on a good conditioned 951? Thanks! This is a very general question.

eclou

yes. Just stay on top of the maintenance items

badass951

Buy a Vitesse MAF kit and it will be. Air to fuel ratios are so good that I do not see what you would have to worry about other than preventative maintenance as eclou suggested.

buxton

I am fairly new to 951's and would also like to get to or close to 300 rwhp. I bought my car with an Autothority chip set, 3 bar pressure reg., and a boost enhancer set to 15 psi.

What are your opinions for the best way to get there with the best use of my money? What upgrades are the best bang for the buck?

sweanders

For 300 rwhp you should start looking at a better turbo and wastegate, taking any stock turbo there is pushing it outside it's efficiency.

On this forum the search function is really good.

jgporsche

get a 3" exhaust. That will definitely free up some power. that old stock piece of crap is a BIG hindrance. Also like sweanders said, get a better wastegate.

sweanders

A few weeks ago there was dyno proof that showed upgrading to 3" with stock turbo did nothing for power.

streckfu's

+1.

The easiest (read single source) route is to look at the Lindsey 340 kit and Vitesse kits. Provided the maintenance is good, both will reliably break 300hp. You will need a few extra items for the Vitesse kit (injectors, exhaust) but his products are proven.

Search is king.

jgporsche

Me personally, I saw over 40whp. But, i deleted both the cat and muffler. Do you have a link to the chart?

Ski

fourside, call Lindsey, email Vitesse, as this will be very easy to obtain.

Once you make your decision, stick with one vendor(they are both the best for our cars) as it makes tuning and diagnostic work that much easier for you, the end user.

sweanders

Here you go:

https://rennlist.com/forums/showthre...%22+dyno+gains

I remembered wrong, there were some gains, 4 hp to be exact..

testarossa_td

Alright one of these days we need one thread that outlines each step of upgrade.

Dyno for:
just a LBE/Reliaboost
Chips
MAF
Shims on the waste gate
Wastegate upgrade( state size and mfr )
Wastegate dump to atmosphere
Exhaust upgrade(which parts)
gutted cat
downpipe(mfr and size)
catback(mfr and size)
Muffler(mfr and size)

Ok so you get the idea....

Imo000

That's probably because the restriction was not the stock pipe diameter but the cat and the muffler. I think you would hve gained the same hp by just removing the cat & muffler and keeping the rest of the system stock.

I gaind around that much just by replacing the cats with a "test" H-pipe on my superchargerd 928.

ChrisJ951

I have a full Vitesse stage 2 kit with a header and full 3 inch no cat exhaust with a new wastegate, although I haven't put the car on a dyno, my guess is roughly 350 rwhp on 93 octane fuel at 17psi. THe great thing about Vitesse kits is that the power is VERY smooth. 951's have never been an off the line car, but from a roll, there aren't too many cars that can keep up.

jgporsche

That's some interesting info Sweanders. Thanks for the chart.