18.5 HP difference Uncorked through the Headers. Is this normal?
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Instructor
Joined: Sep 2000
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From: Chatsworth, Ca. 91311
18.5 HP difference Uncorked through the Headers. Is this normal?
When Dynoing my car there is a 18.5 RWHP difference when running through the full exhaust. First is this normal and have others seen this variance. My exhaust today consist of RKS Long Tubes, factory cats (No Precats), and the flowmaster kit. This combo yields 391.5 RWHP.
With the car running straight through the headers, it makes 410 RWHP. Both runs where done 10 minutes apart with identical tuning.
If this is normal I wont bother changing anything out, otherwise what should I expect by changing over to the random tech cats, and Borla Stingers or GHL's. And should I go with 2 3/4" or 3" pipes from the headers back?
[Modified by shaheen, 10:39 AM 11/23/2003]
With the car running straight through the headers, it makes 410 RWHP. Both runs where done 10 minutes apart with identical tuning.
If this is normal I wont bother changing anything out, otherwise what should I expect by changing over to the random tech cats, and Borla Stingers or GHL's. And should I go with 2 3/4" or 3" pipes from the headers back?
[Modified by shaheen, 10:39 AM 11/23/2003]
Team Owner
Joined: Apr 2001
Posts: 36,453
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From: Overwhelmed as one would be, placed in my position.... DFW, TX
St. Jude Donor '05
Re: 18.5 HP difference Uncorked through the Headers. Is this normal? (shaheen)
I think Lou at LGM reported only a few HP loss difference between the Random-Tech CMM cats versus the straight pipes... I would think the stock cats are your biggest bottleneck now... Call LGM and ask about the Random's.
Safety Car
Joined: May 2000
Posts: 4,827
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From: Albuquerque NM
Re: 18.5 HP difference Uncorked through the Headers. Is this normal? (shaheen)
Sounds about right, I made 425 open headers, then 413 with factory cats, x pipe, and Corsas behind the long tube headers.
Le Mans Master
Joined: Jan 2003
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From: Tyler TX
Re: 18.5 HP difference Uncorked through the Headers. Is this normal? (Umrswimr)
I think Lou at LGM reported only a few HP loss difference between the Random-Tech CMM cats versus the straight pipes... I would think the stock cats are your biggest bottleneck now... Call LGM and ask about the Random's.
