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Backfires at 4K RPM...why?

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Old Aug 20, 2006 | 08:23 PM
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Kevinsino
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From: Panama City, FL
Backfires at 4K RPM...why?
Hey guys, I have a N/A vert and I was 'opening it up' on the hwy and while I got up to 4,000 RPM, the car would backfire as I changed gears....why does that happen?

By the way, I have no cats if that means anything...

Thanks!!!!

--Kev
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Old Aug 20, 2006 | 09:58 PM
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Bump.....
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Old Aug 20, 2006 | 10:12 PM
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someone told me about this..I forgot but that does sound ******* retarded.
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Old Aug 20, 2006 | 10:15 PM
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having no cats can allow the car to backfire and shoot flames, but i always thought it was at much higher RPMs
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Old Aug 20, 2006 | 10:20 PM
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no i have gutted my cats and then the car would backfire so i got a striaght pipe welded instead of the cat then it stopped what was happening is that it makes like a gas chamber and its so hot it backfires kinda hard to explain
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Old Aug 21, 2006 | 04:35 PM
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Ah, thanks for the info. I appreciate it.
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Old Aug 21, 2006 | 05:59 PM
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Originally Posted by jl1rx7
I guess you guys havent owned rotaries before. The rotary runs pig rich, by default, so high rpms, when you drop the throttle, all of that fuel mix goes out your tailpipes and then you have backfire, or flames out the tailpipes. especially if you run straight pipes. it is the rotary "pop". its nothing to worry to much about, unless you are running standalone, high boost, etc. otherwise its just a way to keep people from tailgating you!

this is from another post
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Old Aug 21, 2006 | 06:00 PM
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yeah I would go with what Wild said. I had the same thing happen to me on one of my old N/A's
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Old Aug 21, 2006 | 06:43 PM
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OK..I just wanted to make sure i wasn't going to blow up or anything......
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