SLORYDER Posted March 23, 2010 Report Share Posted March 23, 2010 Has anyone filed their piston crown to increase trans. or exh. duration and if so how much metal can you safely remove. Seems like a mm or so could be had but then again I'm a complete noob when it comes to pistons... I'm thinking more along the lines of the trasfer duration right now.... Quote Link to comment Share on other sites More sharing options...
SLORYDER Posted March 23, 2010 Author Report Share Posted March 23, 2010 Now that I think about it that would kinda jack up your squish clearance if it were do-able, but it would probably more than compensate with the increased top end if you had the right pipes and exhaust durations... Quote Link to comment Share on other sites More sharing options...
blowit Posted March 23, 2010 Report Share Posted March 23, 2010 Now that I think about it that would kinda jack up your squish clearance if it were do-able, but it would probably more than compensate with the increased top end if you had the right pipes and exhaust durations... We usually only recommend it to do some testing for final port durations. Use older pistons and file them until you find the sweet spot you want to be in, then replace with new pistons and port accordingly. Mull Engineering Quote Link to comment Share on other sites More sharing options...
SLORYDER Posted March 23, 2010 Author Report Share Posted March 23, 2010 We usually only recommend it to do some testing for final port durations. Use older pistons and file them until you find the sweet spot you want to be in, then replace with new pistons and port accordingly. Mull Engineering Would you recommend I try opening the secondary a couple degrees sooner for later? I am going for a good top end pull and would like to keep some range Thanks Quote Link to comment Share on other sites More sharing options...
blowit Posted March 25, 2010 Report Share Posted March 25, 2010 Would you recommend I try opening the secondary a couple degrees sooner for later? I am going for a good top end pull and would like to keep some range Thanks I am not sure what your engine setup is but I would recommend just doing one thing at a time and testing. Doing everything at once will leave you scratching your head if you screw up. Document your results and you will figure out what helps and what doesn't. Mull Engineering Quote Link to comment Share on other sites More sharing options...
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