how much gain for removing cats?

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Jun 24, 2003 | 01:14 PM

BOOSTEDTA

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Launching!

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From: Greenville, SC

how much gain for removing cats?

ok, seeing that i can't really spend much $$ right now for something like headers, would it be worth my while to get rid of my cats? i've got a pretty good muffler shop that will do it for me. guess i would just need 2 O2 simms. would i get any measurable gain from doing this? looking for any cheap effective mods i can! i've got a pulley on the way, and i'm trying to get a TB from Bauer but they're out of stock right now...

Jun 24, 2003 | 01:24 PM

BlackEcho

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From: Houston, TX

Re: how much gain for removing cats?

i am not sure if you will see any major hp gains but i do believe it improves the throttle response. I even heard somewhere it gave someone about .05 better 1/4 times. Dont quote me on that though.

Jun 24, 2003 | 02:55 PM

highgear

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From: Helendale, Ca (SilverLakes)

Re: how much gain for removing cats?

Removing the Cats gets you about 3-5HP max.
Not worth it IMHO.

Jun 24, 2003 | 03:45 PM

2000Z28M6

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From: C.C., TX

Re: how much gain for removing cats?

Quote from Install University Tech
Mathematical Models

Each pair of catalytic converters restrict about eight (8) rear wheel horsepower on stock LS1’s. David Vizard’s research shows that 2.2 cfm of flow at 20.4” of H2O will support 1 horsepower. 2.2 cfm is the optimum flow through the exhaust system and reflects open pipe flow. Removing the stock catalytic converters on the LS1 usually results in a gain of 8 rear wheel horsepower. Assuming that the average LS1 puts 300 horse power to the ground, that is a 2.67% increase in power.