PorscheDoc

Just installed a lindsey 3" exhaust (no cat) with magnaflow muffler on a freinds 88 951. The car had a stock exhaust with a gutted cat. Tomorrow evening we are going to throw it on the dyno and see what kind of gains we get. IIRC our baseline is 209hp at the rear wheels, but I will have to check tomorrow for sure.

Anyone want to make a guess as to what we will gain? I wish he would not have had a gutted cat, and a fully stock setup, but I guess we will go with what we got. 10, 15, 20hp?

RK951

Since its a pure guess I'll go with 9hp.

Ski

12

fast951

This is not the best way to look at the gain. Overlay both dyno charts, HP & TQ then compare. Peak numbers are useless.

IPSC

Not even going to hazard a quess but I am going to be curious as hell to know, that is for sure.

IPSC

jimbo1111

Can you make it clear what you installed on his car. Just the cat back or a 3" cat bypass and cat back. If it's just a cat back I don't think you will see much gain if any. With the "3 inch cat bypass you might see gains in the 20rwhp range depending on how collapsed the pipe has become over time.

PorscheDoc

3" full exhaust.

And john is right, we will overlay the baseline and post curves and see what they look like.

PorscheDoc

I would guess that looking at the curves we will see power come on quicker, and the gains will probably not be all that significant..

ivai

I agree Doc, I think you will see the power come on a little more quickly.

danny951

since it's just a guess, i'll say 17hp

black944 turbo

Let us know how this go.

Bri Bro

Same at 3K, + 20HP at redline.

aeronautica86

1,000,000 horsepower!

PorscheDoc

That was actually my secret guess I was keeping to myself....damn.

Chris White

3hp.....but I will tell you at what RPM after I see the charts....!