JBP VORTEX Header group by????
#258
Senior Member
iTrader: (4)
I'm getting it because i want a little more bottom end power...and it sounds fk'n sick haha
#259
Senior Member
If you are buying it for the sound, that's cool. I personally think it sounds raspy. Usually when a product gains HP, the manufacturer is more than happy to post Dyno graphs. A friend of mine bought one and did a before and after dyno. He lost about 10HP.
#261
Haz l33t wheelz.
Ok, that may be true, but it may be misinformaton, which you don't need to be spreading. My guess is that he got this, and the car wasn't pushing the kind of power to require a 3" exhaust system, and that sir, is why he lost power. Velocity dropped, and not enough air was moving. I can see this being the issue on cars that are not modded enough to warrant a 3" system, but until you get the facts from your "buddy" don't spread slander.
#262
Senior Member
I consider dyno graphs to be factual. He changed out the header ONLY. He was running a 2.5" exhaust. Ask JBP for dyno graphs and see what you get. I went from a GMPP 2.25" exhaust to a Hahn 3" on a stock LSJ tune and I noticed a decent increase in performance, so I'm not sure where you are coming from there. I am still using the stock header and DP for now though.
#263
I never heard of someone losing 10HP with the header or any HP whatsoever. The powerband is shifted down-low with our header. I'll get dyno's of Player_1's car and post them, and everyone can check the torque curve and see how they like it. Right now we've moved the shop, I'll have to dig through boxes to find them and scan them. He's pushing around 260hp.
#264
i'm not trying to start a fight but isn't it funny how is it always "my friend" ... never mentions a name or provides any proof of his own... bumpin, and for all you know he switched out the manifold to the header and didn't get it bolted down right and was having a horrible exhaust leak right at the head... if all your looking at is dyno sheets... there are alot of factors to be played into something like that...
#265
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I consider dyno graphs to be factual. He changed out the header ONLY. He was running a 2.5" exhaust. Ask JBP for dyno graphs and see what you get. I went from a GMPP 2.25" exhaust to a Hahn 3" on a stock LSJ tune and I noticed a decent increase in performance, so I'm not sure where you are coming from there. I am still using the stock header and DP for now though.
have any proof? i doubt it, jsut curious. was it on the same dyno, same day same conditions? Was the dyno numbers repeatable? were his iats okay? i'm sure you just blow me off though cause you seem like a troll.
#266
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#268
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