Hi my car is currently at at a tuners having a fair bit of work done just had omex fitted and while mapping they said the piper cam i have at the moment is causing issues at 5,500 rpm that it is bouncing to much and is causing something similar to a misfire and advise i have a newnham cam put on to solve this has anyone had these problems before how good are these newnham cams the car is a erst cheers jay

 

They are the ONLY cam that seem to last in a cvh nowadays buddy. Sounds like your tuner is offering good advice

 

the piper and kent cams are renowned for being to soft and especially when used with to strong a spring,it sound like he needs to change valve springs more than the cam itself but id go with what hes saying as the newman cams are grond from blank cold iron and are much stronger but essential for the right springs so id suggest a cam kit from newman...


cheers danny

 

it is true its down to the new valve springs, old style piper cams had double springs and the new ones have singles and i find above 18/19psi you will get valve bounce which will feel like a top end misfire when mine done it i fitted duplex race springs and heavy duty lifters and had 240bhp .... but the piper cams wear out pretty quick at those figures so an upgrade is needed...

i've heard alot of the guys with newman cams and solid lifters and double valve springs say they are great and get some realy high figures with them.

 

Cheers for the advice i have now ordered the cam kit hopefully this will be the end of my issues

 

as above ^ newmans the way to go ! i had a piper 285t2 camshaft and was getting valve bounce at around the same rev's put some kent springs in and was all good. that was a few years back.