Inliners International Forums General Discussion Engines Exhaust question on my 292

Hey guys, I got question. I got a 292 I6 with flowmaster delta flow 40 muffler with 2 inch dual outlets. When my engine gets up to temperature or warmed up it starts to have a poping sound when I come to a stop light and its idling. I don't get why its doing that??? Any ideas??

Thanks,
Matt

Matt,

I have the same muffler (albeit with dual 2.25 inch outlets) and I don't have this problem. What's the rest of your setup? Are you running headers (and if so what type)? What's your induction and timing setup? And is the "popping" sound coming from under the hood (carburetor) or the exhaust?

I haven't had this problem. I have long headers and a 4 barrel on an Offenhauser intake. It could be anything from your timing to a leak somewhere. Once your other parameters are known we can eliminate some possibilities.

-magic mike-

Its basically all stock motor and I think i narrowed it down to the 1bbl carb or my timing mite be just a tad high. Today, I drove it to school and it didn't do it but the exhaust sounds really good. Just when it idles it makes a pop sound sort of like when you have backpressure. So, I think thats what it is now just need to upgrade my carb and i have hedman hedders for it but don't have much time since I redoing my 71 camaro.

It sounds like you probably have an air leak somewhere between the cylinders and the muffler, probably either at the head or between the manifold and the pipes.

Well its a almost new motor only got like 2,000 miles on it

I found i have a tiny exhaust leak around the exhaust manifold where it connects to the pipe and I think i found the problem. Engines runs great.. I'm happy

Thanks,
mATT

I have read many posts about the flowmaster delta flow 40, what's their sound? its really great?, is It connected with a Y Pipe?, Does not affect the Y pipe with the function of the headers?, I have dual exit pipes with 36" glasspacks the sound its good but not to rough, I really appreciate if someone like you have sounds of their ride with the deltaflow 40 muffler, thanks a lot dudes...