rolling road session spoilt, boost tails off at 5000 rpm, CAMS FAILED !

[rstdave]

Originally Posted by Karlos G Valve float is not common really on CVH's, as I mentioned earlier the sprins rate is really high to start with so even if they were a little weak it should still be enough! lol I'm using 20 year old springs as far as I know and have no probs with a rev limit of 7000rpm and thats with a Newmans cam and solid lifters. Standard ford springs are indeed the ones to use over aftermarket ones it seems.....just for reference DO NOT touch Newman's own springs lol....the problems i had with valve bounce at high rpm were indeed down to their springs they told me i had to fit! When i changed them for ford springs we measured the springs poundage, and the newman were 124pound compared to the ford ones at 185pound Car revved happily to 7k afterwards

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[Karlos G]

Originally Posted by OLDSKOOLRYAN

can anyone tell me the exact procedure for fitting a new cam please.
i know i have to fit new tappets at the same time.
i think i have read somewhere that it needs to run in at 2500rpm for twenty mins ??? is this correct
thanks for all your help guys

Correct
Also make sure you use plenty of cam lube when fitting, both on the lobes and lifters, well on everything TBH!!

[rsmark86]

you can get duplex 200lbs double valve springs from burton power for under £80

and newman cam is £124 and the solid lifters are 150