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Re: SVO: XR racing, and downpipes...

I dont know what others are saying, but I never said that a 3" DP would
not help a modded exhaust...Did I?  The question was...if you could change
ONE thing, the cat back or the headpipe, what would help.  Im saying that
with a stock cat back AND cat, your not gonna get alot more flow....next..

On Tue, 25 Nov 1997, Ric Gillis wrote:

> Ok, I've been quiet so far.
> Here is my *opinion* with some *facts* (arguable) to back it up.
> I had run quite a few tests with a G-Tech, always set at a car weight of
> 3100#, always used 2nd gear to run the test and my best ever HP reading was
> 197HP, the car is an XR with a few mods but most importantly a Borla
> downpipe(2 1/2"), stock cat and Borla dual exhaust.  I bolted on a MP 3"
> downpipe and ran my first and only recorded run with just the pipe change
> and got 203HP.
> Seat-of-pants, it did feel different, the boost *seemed* to hit at lower
> RPMs.
> Ok to be fair the tests were done on different days so weather may have been
> a factor, but it was not colder out for sure the day of the 203 run, and I
> had never gotten better than 197HP ever (yes I did run it more than once
> before), and now got a 203. AND the car felt better so *in my opinion* with
> *my combination* the 3" MP downpipe was an improvement.  I can't say what
> the difference between a stock down pipe and a 3" but theory aside I noticed
> a difference going from a mandrel Borla to the MP 3".
> Ric-


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