Quote:
Originally Posted by mystein
Since you've tested "TONS" of exhaust systems for companies you'd probably say B.S. that my '03 Cobra went from 382 peak rwhp completely stock (as delivered from SVT) @ 1500 miles to 415 peak rwhp @ 2000 miles with only the addition of a Magnaflow Catback and a UPR CAI Kit. 33 rwhp and the temperature on the day of the modded test was higher with higher humidity to boot.
I'll gladly perform the same little comparison with my GXP. I need to get the car to MC Racing in KC for the baseline (with K&N drop-in) and then after I get the Magnaflow on I'll return to MC Racing and have a re-dyno (with atmospheric conditions as close as possible). I have a gut feeling that I'll be seeing quite a bit more than 6 peak rwhp difference between those runs. I'll even make sure that several hundred miles of "learning" miles are acrued on my GXP "after" addition of the Magnaflow Catback to rule-out the possibility of the computer not having had enough time to make its "supposed" adjustments.
The baseline won't happen next weekend but it will probably happen the following one (June 23rd). Then it'll be a bit for me to get rest of my $$$'s together so I can add the Magnaflow exhaust but I'll try to have the re-dyno completed by the middle of July. That's the best I can do but seeing that no-one else has taken the time to make proper comparisons that's all I can do.
This way it's same car...same dyno...same dyno operator...as close to same conditions as I can make it (right down to tire pressure and fuel-type and weight of car).
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You are completely missing the point. You are not assuming that exhausts dont do anything. What does your '03 cobra have to do with any of this? BTW, I was just faxed this from someone who just had their GXP dynoed with the Magnaflow exhaust.
I guess he felt it was pointless trying to explain things to people on the forums.
