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Where's The Power Gone?

Country Cruzin

By Country Cruzin,
in Forced Induction Performance

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

f**k im gona bash mu cat gutless next tune, its a 100cell metal item tho..

Can you try dropping the exhaust first? I have a Venom 100 cell metal cat and would be interested to know if they do significantly reduce power. I believe they don't but hard evidence would be good! Need the cat for a cert but if they cost 50 -60 hp its days are definitely numbered! So far my RB30/25 is only making 220awkw at 15psi. I have been concentrating on fixing the oil control problem but have nearly sorted that and will concentrate on finding the power ( will be going to 18 -21 psi but should be making nearer 300kw at 15 psi :(

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SargeRX8 Grand Master

SargeRX8

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Can you try dropping the exhaust first? I have a Venom 100 cell metal cat and would be interested to know if they do significantly reduce power. I believe they don't but hard evidence would be good!

This too. My car is down about 50rwkw and we suspected the intake. Ive fixed that up but really hope my cat isn't the issue...

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SargeRX8 Grand Master

SargeRX8

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I have had a lot of catalytic converters drop power these days.

Sarge did we drop the exhaust on ur car when tuning?

What cat is Stao running?

We didn't drop the cat, Wolverine on here runs the same cat and makes the predicted power with his turbo as do a few other members. These 5" body venom cats only have 100 cells in a massive body so should be better than most cats. Send me a PM, I'm ready to bring the car back up to you when you are ready(just need to change my AC belt, its squealing and tearing lol). Stao doesn't run a cat...

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GTR_JOEY Grand Master

GTR_JOEY

Posted
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My car has lost about 85hp at the wheels, thought the motor was getting sad, but got the leak down test an compression test done both came back fine. tune still seemed good just missing power (from 385 back to bout 300)

wondering if anyone had any ideas wot it could be? thank in advance :thanks:

Was both results on the same dyno?

alot of happy dynos out there haha

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KiwiRS4T Grand Master

KiwiRS4T

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was a 3inch high flow metal cat... dont know shit bout them, yer think it was pretty clogged

How long had it been installed and clogged with what? Getting worried about mine now.

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Dajae Community Regular

Dajae

Posted
Posted

Does anyone else picture a furry little cat clinging onto the bottm of the car for dear-life? Lol.

I used to have a nismo cat. Made 252rwkw. Dropped it and put in a de-cat pipe.. Made ~262rwkw. Silly mistake.. Should have kept it on. The power gain barely (if at all) justifies the legal issues.

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  • 3 months later...
040122 Collaborator

040122

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Posted

Hey I got a stock 32 gtst with a 3inch cat back exhaust and a hollowed cat, it feels more gutless than a stock 32 should does anyone know if an empty cat on a stock car drops performance

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SiR_RB Grand Master

SiR_RB

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I Had a 3" metalcat, tuned with it...then gutted it, ran it on the Dyno and we could add more timing without it knocking

Have since added big mofo front pipes and 3.5" decat - 3.5" cat back

Dead cats are good cats :)

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