Aussieveedubbers · Tech Talk

Exhaust Question

https://forums.aussieveedubbers.com/threads/25759/exhaust-question

57 Chook Shed ·

Does anyone know if an out of balance exhaust (ie on half of the engine less restricted tan the other) can make the engine run like a bag of shit.
I was messing with my Ute today and converted the stock single tail pipe muffler to a twin large bore tail pipe home made jobby. The new pipe that I welded in is a lot louder than the original.
I take it the single tail pipe mufflers have different internals than the twin (beetle type)??
It`s kind of like it won`t rev up properly and is poping and farting.
Think I better weld the hole up hey??!!

barls ·

definately sound like an exaust leak but then again could just be the engine needs to be tuned to the exhaust

Alex Holzl ·

check the bolts and gaskets are good off the head and there are no gaps in the exhaust apart for the outlets of couse...

57 Chook Shed ·

The thing is, it ran fine before I cut another hole in the stock muffler (it had a pressing where the outlet on the twin tail pipe muffler is).
All I was wondering was why has it made it run like crap??
I have not touched any of the flanges etc and there are no leaks.
Cheers.
Graham.

barls ·

most likely a lack of back pressure

boof2332 ·

Back pressure would be my guess as well as a leak.

VW engines rely on back pressure, without it they do run like crap and have heaps less torque....

Matt