MY CAR IS TOO SLOW!! - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 06-24-2006, 01:00 AM   #31
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Gutted cat? That'* not doing anything to fight KR. What it will do is get me a $250 reward for turning him in. It'* a Federal Law, regardless of local emissions laws and testing.

Thank you. $$$$

After he pays the fine for the gutted cat, PEM'* would be the next move. In the meantime, I'd take the pulley off or put a 3.5" on it.
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Old 06-24-2006, 01:29 AM   #32
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He won't be able to afford PEMs after you turn him in.
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Old 06-24-2006, 01:34 AM   #33
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I'm actually not turning him in. I'm making a point that there is no gain to be had for him, it'* illegal, and it'* irresponsible.

A good hi-flow cat is $50 bucks or so.
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Old 06-24-2006, 01:42 AM   #34
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I know that high flow cats are cheep, but I don't understand how a high flow cat helps power and no cat doesn't help power any?

I understand how it'* illegal and it'* irresponsible, and I even told him that, but it has to help power.

Reguardless, do you think he should have KR with those mods? I don't think he should, but what do your guys think.
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Old 06-24-2006, 01:45 AM   #35
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No cat does not help whatsoever. You lose alot of backpressure and low end torque. Hi-flow cat is highly recommended. I removed the cat off of my 96 Ciers, I lost alot of low end power.
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Old 06-24-2006, 01:50 AM   #36
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What'* the transition between too much backpressure and not enough? I can feel how his car lost low end and really gained high end.

I don't know, but gutted it will stay. He'* not going to put a cat in.

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Reguardless, do you think he should have KR with those mods? I don't think he should, but what do your guys think.
Any ideas or opinions?
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Old 06-24-2006, 01:57 AM   #37
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He'* not flowing nearly enough to warrant needing a 'track pipe' in place of the cat. Not even close.

And there are MANY L67'* here that had KR with a 3.4" pulley. They either went back to a 3.5" or changed to PEM'* or Headers.

That'* why we usually suggest a 3.5" pulley to start with until other supporting mods are in place.
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Old 06-24-2006, 02:19 AM   #38
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Well, I'll tell his to start saving for some PEMs.
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Old 06-24-2006, 03:27 AM   #39
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Some of us fight 2-4* of KR even with headers with a 3.4....Hopefully it will go away when I put the rockers on.
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Old 06-24-2006, 05:22 PM   #40
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Quote:
NO computer because the LSS isn't popular enough.
DHP does do pcm'* for the LSS. GM tuners also told me that if I wait till fall they will have one too.
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