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

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27-05-2010, 05:37 PM

#41

rstdave

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Quote:

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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28-05-2010, 02:35 PM

#42

Karlos G

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Quote:

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