Hey everyone ,
I was just wondering.. If I cut my cat. and put a straight pipe on, and put a flowmaster on , how many horses am i looking at gaining ? thanks ..

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1991 Red Camaro RS

 

probably 3 to 5 hp.you probably won't feel it but you will hear it

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1987 irocz red 5.7 A4 t-tops,a/c,roof console,auto inside rear view,p/w,p/l,Ram Air,cat back(dynomax pipes,flo pro muffler,hypertech airfoil

 

Thanks man , one question though, should i put a straight pipe on ? is there anything else i can do to increase horsepower in this area ? thanks ..

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1991 Red Camaro RS
MODS:rebuilt 350, K & N. 10'MTX.

 

I think you will gain more power than that. Prolly closer to 10 or more. If your cat is at all clogged even more. If you ahve a really built motor even more power. It all depends on a stock motr not too much.

 

Lose the whole set-up and get true duals and some full length headers and an X-pipe not a H-pipe a X-pipe, X- pipes are known to give faster flow than h-pipes and dyno tests show the same gains with x-pipes as running full length open headers..



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86 Chevrolet Camaro Iroc Z-28 Fully Loaded With T-Tops
Mods;
Spohn SubFrame Connectors, S&W Race Car Chassis 8 point Roll Cage, 1997 SS Aniversary 3.42 POSI Rear End with 12" Rotors and 4 Piston PBR Calipers, Balanced Drive shaft... Others soon to come...

Best times before any mods done, Complety Stock;15.6 @ 87mph
Waiting for the tracks to open again to see what I got going on Now!

ntimad8.cz28.com

 

 

Thanks fellas for all your insight. J/W have any of you cut your cats? If so what did you put on to replace it ? 10 or more horses sounds bad as$ to me !

 

Check the sig. I work at a parts warehouse, and I put together a "patch" that goes in place of the Cat.

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-Brad C?
355ci '89 Iroc-Z Red, T-tops, power everything, A4,New 10 bolt w/ 3.73's
Trans-Go shift kit Corvette Servo,Accel 8.8mm wires,Flowmaster 80 series ,K&N's, !MAF Screens, Hollowed out airboxes,homemade Subframes. Kieth Black pistons 10.3:1, Comp Cams 270H (.495/.502 218*/224* 110*LSA) & valve springs, SLP 1 3/4" headers, TCI 2400 stall, Dual Roller timing chain, 2 3/4" I-pipe.
Full street trim best run:14.799/mph:93/60': 2.02 (last year) New Times to come.
New times: 14.423 @ 96.11 mph with a 2.08 60' (On stock programming)

Pics of the Iroc

 

I am making duel exhaust for mine? x pipe that will be able to be taken apart so I can remove it if it is stopping me from doing something.