diesel and tune pipes
03-31-2007, 04:57 PM
#1
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diesel and tune pipes
Today i did the runing in of my new irvine 40d and tryed on a mvvs mini pipe to my surprise performance deteriorated i could not set it and it did not get any power inpovement what so ever how hard i tryed.
laurence
laurence
03-31-2007, 06:32 PM
#2
RE: diesel and tune pipes
mine does better on a regular MVVS muffler at least 500-better than stock irvine got it from Dar its the short one do not know model number martin
03-31-2007, 09:17 PM
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RE: diesel and tune pipes
Your result is not really surprising-diesels and tuned pipes are not normally a workable combination-except in the 'stunt' type use where the pipe is holding the revs down to a certain band. The conventional 'tuned pipe' as used in speed does not work very well if at all-for several reasons-one of which is theexhaust timing which needs to be up around 170 degrees compared with 150-155 degrees for a std engine. Secondly if the revs jump the needle has to be readjusted significantly to 'keep it on the pipe' and thirdly-if the revs do jump-then your compression setting will be way off optimum! it may be possible to get a diesel running with a pipe on the bench-with a lot of fiddling-I doubt whether it would be possible to do so in a model without having the ability to adjust both needle and compression in flight.
Otherwise you simply have a device that is a flash looking silencer............
'ffkiwi'
Otherwise you simply have a device that is a flash looking silencer............
'ffkiwi'
