HOLSTEIN Posted August 16, 2005 Report Share Posted August 16, 2005 went to the local muffler shop today and "bubba" told me that there is no real diff between a stock convert and a free flowing? i really dont know much about cats but i say ... i also talked to a friend who questioned the fact about gutting the cat, (no sniffers here in WV) but would that make the check engine light come on? (o2 sensor) i know someone has tried gutting the cat convert, if so give me some feedback.... thanks Link to comment Share on other sites More sharing options...
kaotik1 Posted August 16, 2005 Report Share Posted August 16, 2005 The flow of a stock cat is about the same or better than most aftermarket cats. There are no gains from gutting or removing your cats. There actually might be some mileage loss in doing so, being that cats are to help fuel burn but I dont know. Link to comment Share on other sites More sharing options...
HOLSTEIN Posted August 16, 2005 Author Report Share Posted August 16, 2005 i see what you are saying, i guess that it would just help get the exhaust out faster... old timers used to do it alot but the again that was before all the computers under the hood..... if i am not mistaken someone on the site has "GUTTED CATS" on there sig Link to comment Share on other sites More sharing options...
kaotik1 Posted August 16, 2005 Report Share Posted August 16, 2005 I think it was Mr. P the stealth cat as he called it.. Most of the old timers used carbs, and when you removed cats you would get gains. I know I have an older carbed motor that got about 5 hp from cat removal. Link to comment Share on other sites More sharing options...
SSplaytoy Posted August 16, 2005 Report Share Posted August 16, 2005 The O2 sensor would come on but you could weld a nut in the pipe and put the sensor in it if you did that to your cats. Link to comment Share on other sites More sharing options...
HOLSTEIN Posted August 16, 2005 Author Report Share Posted August 16, 2005 what do you mean, "weld a nut in the pipe and put a sensor on it" where at? in front behind? Link to comment Share on other sites More sharing options...
kaotik1 Posted August 16, 2005 Report Share Posted August 16, 2005 Where the bung is for the 02, you weld a nut and bolt up to eliminate the 02 and then get the 02 sensor trick plug. Link to comment Share on other sites More sharing options...
HOLSTEIN Posted August 16, 2005 Author Report Share Posted August 16, 2005 gotcha where do i get the trick plug $? Link to comment Share on other sites More sharing options...
kaotik1 Posted August 16, 2005 Report Share Posted August 16, 2005 I think summit or jegs. I think they were around 40 or more dollars. Link to comment Share on other sites More sharing options...
oscareltemblo Posted August 16, 2005 Report Share Posted August 16, 2005 I took the converters off a mustang saleen I had and let me tell you there was a big difference not sure the gain but, it was noticeable also very cool rumbling sound btw it wasn't carburated just my 2 cents. Link to comment Share on other sites More sharing options...
zippy Posted August 16, 2005 Report Share Posted August 16, 2005 well, i can say we've done the test on a silverado SS. there was less than a tenth gain in the quarter and this was a supercharged truck. the stock cats flow pretty good and aren't worth messing with. just leave them alone. Link to comment Share on other sites More sharing options...
dcairns Posted August 16, 2005 Report Share Posted August 16, 2005 Don't even think about it Link to comment Share on other sites More sharing options...
oscareltemblo Posted August 16, 2005 Report Share Posted August 16, 2005 I took the converters off a mustang saleen I had and let me tell you there was a big difference not sure the gain but, it was noticeable also very cool rumbling sound btw it wasn't carburated just my 2 cents. <{POST_SNAPBACK}> Also when I installed the flowmaster on my sss it I started it without the muffler got to say that it looks like they're not to restrictive I'll leave mine alone this time .. Link to comment Share on other sites More sharing options...
haynss Posted August 16, 2005 Report Share Posted August 16, 2005 gut them if you got a STS turbo or you might be seeing popcorn coming out of your pipe Link to comment Share on other sites More sharing options...
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