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Old 02-13-2002, 03:55 AM   #1
Skyman
I need 110mph Trap Speed!
 
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Join Date: Feb 1999
Location: So, CA
Posts: 4,315
Default Cat Hpipe VS Stock VS OffRoad

Well when I changed my car from the stock Hpipe to the offroad I got HUGE Gains. It was one of the very last mods I did, so I figured the stock Hpipe was kinda clogged and thats why it made such a huge difference.

Well I just put on a MAC Hi-Flow Cat H-pipe and my car is wayyy quieter! Which is alright, but I lost tons of power.

I DONT GET IT!??!

Everyone had me convinced I would loose maybe maybe 5hp.

It definatly lost about 30-40 hp on the butt dyno. It doesnt feel alot faster than when I had the stock catalytic H pipe on.

It used to just annihilate the tires going into 2nd gear for 30-40 feet, now it just spins em for about 5-10feet.

Is there any explanation for this?

HELP, I need more HP. Im going to have to do something drastic, the car is not what it used to be.

Skyler
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2001 BMW M3 6spd
12.79@108

RIP
----
1993 Notch w/ 98 4V 4.6 Fasttt...

-1989 Saleen Mustang #406-
12.32@109

-1999 Black Cobra Coupe-
JBA Shorties, Bassani Cat-X, Magnaflow 3", Pulleys, 85mm Pro-M, Ported Intake, Soild Rear w/ 4.30s, Tubular Front End, X2C arms, 13lb batt, few others.
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