Not only expected but should be actively encouraged ;)

[Edited by NENO - 8/5/2003 4:54:45 PM]

I recently fitted a Forge vta dump valve to my Classic and have noticed that it sometimes 'pops' or 'farts' between gear changes. Especially between 2nd and 3rd under heavy acceleration. Is this normal???

Normal M8 ;)

My understanding is (and I wait to be corrected) that the MAF senses a certain amount of air going into the engine and the ECU squirts in the right amount of fuel. When the DV dumps some of the air escapes so for a second the engine runs rich and some of the fuel doesn't get burnt, goes through, hits the exhaust and goes pop!

As long as its to be expected. Cheers fellas :)

Well now I know....... :)

Sounds good and makes Old Biddys jump!