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how much hp gain will a set of aftermarket headers effect my car that already has a high flow cat back system? Also, how much more hp do you think I have over stock?
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1999 y87 a4, american thunder cat-back, 3.42 gears, headers, grey racing stripes, billet grill, 17inch c5 rims -
10 tops -
depends on your other mods, if you only have high flow cat and catback id say around 10\'99 SSM Camaro V6 M5<br />(mod list on cardomain site; too long to list here)<br /> <a href=\"http://www.cardomain.com/id/v6cam99\" target=\"_blank\">http://www.cardomain.com/id/v6cam99</a>Comment
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well in our cars we have 200 hp, but we lose 15% of that by the time that it gets to our tires.WAWA-A-HOLIC
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Ours cars come stock with like 160-170 HP. Supposebly 180 RWHP or 200 or what ever but that is in maybe perfect conditions on a brand new car with a little stretching the truth.
It depends on other mods. I dont think they add much at all, maybe 5. Makes it sound alot better though.2001 V6 Camaro - VTEC Badged, Abbott Racing Heads Sticker, and Loud A$$ Exhaust<br /><br /><b>BUILT NOT BOUGHT</b><br /><br />14.0 @ 96.44 MPH (Street Tires, Before Tranny)<br /><br /> <a href=\"http://members.cardomain.com/6pakcamaro54\" target=\"_blank\">http://members.cardomain.com/6pakcamaro54</a>Comment
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well, after year 99, they introduced tubular exhaust manifold instead of log manifolds...gains are minimal then...correct me if im wrong there.Slick - US Military - overseas. <br />\'01 Pewter Firebird \'Vert<br />SLP CAI, MSD coils/cables, Whisper lid, Pacesetter Headers, Borla 3\", Catco 3\" cat, K&N filter, Intense Racing PCM, Lakewood LCAs,180 TBI--> BMR PHR, ZT LSD, Motive 3.42s, FFF TurboComment
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okay...but with tubular manifolds, the f-bodies are still rated 200hp like before, why then?99\' Camaro M5 3.23 LSD<br />-SLP CAI,K&N,Whisper Lid,!MAF Screen<br />-2\'5 Flowmaster Catback <br />-BMR STB<br />-Kumho 712 supra 245/50/16<br /> <a href=\"http://www.camaroV6.fr\" target=\"_blank\">http://www.camaroV6.fr</a>Comment
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Makes life easier on GM. Costs money to change numbers. Probably not enough gain to warrant changing it. Just my .02Jessica :)<br />Kansas: There\'s no place like home...99 Firebird Blown/6lbs, Eaton w/3.42\'s CI headers Z28 Exaust<br />CAI, #36 injectors Intense PCMComment
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They should've just roudned it to 205Comment
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gains depend on the rest of the system. 10 rwhp on a bolt-on's car is prolly expected, more if you have internal mods.2001 Arctic White Firebird<br />More mods than I\'m allowed to list!Comment
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cool thanks1999 y87 a4, american thunder cat-back, 3.42 gears, headers, grey racing stripes, billet grill, 17inch c5 rimsComment
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CAM IT! (makes headers better-s)It\'s a beautiful life<br /><a href=\"http://www.cardomain.com/ride/2035163\" target=\"_blank\">http://www.cardomain.com/ride/2035163</a>Comment
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I have seen many 3.8 specs stating either 200 hp or 205 hp. My guess has always been that the ones with the tubular manifolds produce 205. So i have always stated to people that my engine comes stock with 205hp. Its probibly a combo of the stright tb and tube mans that give it that extra 5 who knows but if you search the net you see what i mean about the 205hp specs.Comment
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Im surprised no one has dyno'd this. I unfortunately have done more than just headers so it would not be an accurate number.
BTW, I think we lose more than 15% at the wheels or were not at 200 to start. Ive seen people with intake and exhaust mods dyno at 160.01 Camaro A4 ConvertibleComment
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Or me, dyno at like 154. Damn TC drive train loss lol.Originally posted by South Tampa V6:
Im surprised no one has dyno'd this. I unfortunately have done more than just headers so it would not be an accurate number.
BTW, I think we lose more than 15% at the wheels or were not at 200 to start. Ive seen people with intake and exhaust mods dyno at 160.-1999 Camaro Coupe 3800 Series II V6 A4 - SOLD<br />-1998 Pontiac Grand Prix GTP coupeComment
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