Mud-club

Vehicle & Technical => Discovery => Topic started by: mentalmoshio sophs V8i on September 21, 2008, 13:35:22

Title: popping sound on unleaded when changeing gear
Post by: mentalmoshio sophs V8i on September 21, 2008, 13:35:22

http://www.youtube.com/watch?v=dacJQGzaC6c

ever since ive fitted my straight through pipe a popping sound happens when u change gear on unleaded more so than lpg .

seeing this bother me dont think mines flames

cause i park by a plastic wind break at work any ideas or just normal

Title: Re: popping sound on unleaded when changeing gear
Post by: Disco_Stu on September 21, 2008, 16:59:26

Pinking is my guess dave. Its been a while since I worked on petrols but as you lift off and the engine goes into the overrun cycle, pinking (caused by pre-ignition) can occour. It's usually a sign that the ignition timing has been advanced too much, try retarding it a bit and see what happens.

Stu.

P.S - the embedded clip isn't working for me...

Title: Re: popping sound on unleaded when changeing gear
Post by: Range Rover Blues on September 21, 2008, 17:26:56

Probably just unburned fuel in the exhaust, you notice far more now because the exhaust isn't catching any of it.

Like a rally car ;)

Title: Re: popping sound on unleaded when changeing gear
Post by: lee celtic on September 21, 2008, 18:09:52

I'd say it's just unburnt fuel from the over run poping in the exhaust , we used to get some good flames from vance and hince performance pipes on the bikes looks cool at night :cool: