Cvh Valve timing/ cam query

[Mick L]

Does anybody know if people have advanced the cam timing on cvh engines in relatively standard form?

Our engine is a 1600 bored out to 1800 and has a Vernier pulley fitted which is advanced full it seems.

I thought it must have a uprated camshaft fitted. 

Upon inspection of under the rocker it had green dot valve springs which I thought were standard strength?

Furthermore to add to the the mystery upon removing the dizzy there was no markings visible at all. So is it a standard cam fitted with a Vernier pulley? Or do standard ford cams have markings in the dizzy end anyway? I always thought aftermarket cams were stamped too so I'm a bit lost.

Thanks

Mick

[Jim Hearne]

I’m not aware of a reason to use a vernier pulley on a standard cam on a CVH but people do funny things.

I think all the Piper and Kent cams i’ve had have had the model number stamped in the dizzy end.

I think the Ford cams do have a Ford logo and a part number cast into the cam.

 

To be sure if it’s a standard cam you will have to start measure the lift etc

 

If in doubt either put a standard pulley on it for the moment.

 

Jim

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[Mick L]

Yes, I was starting to suspect I need to measure lift. It has no marking on the dizzy end so could be aftermarket as I too thought standard cams were stamped.

It has numerous idiotic repairs and mod to the inlet/ vacuum system too which is why they most likely have the ignition timing maxed advance and cam timing max on the Vernier too.

Feel like Ive bought a car from a 90s max power reader haha.

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From: quantu...@googlegroups.com <quantu...@googlegroups.com> on behalf of Jim Hearne <j...@quantums.info>
Sent: 27 April 2023 08:11
To: quantu...@googlegroups.com <quantu...@googlegroups.com>
Subject: Re: [Quantum Owners] Cvh Valve timing/ cam query

 

To view this discussion on the web visit https://groups.google.com/d/msgid/quantumowners/5C51F4954A374842AB8F0C457DBEB911%40JimQuad.

[listsub3]

Re Camshaft etc. : A agree with Jim's comments that all the performance cam suppliers usually mark the end of their cams and I don't recall seeing any marking on end of OEM cams. Maybe a regrind cam?
 
With regards vernier pulley it's not unknown for them to move (especially the cheap alloy ones) - could it have just slid round to end of adjustment range? If it is an alloy pulley worth checking the size of teeth - the cheapo ones tend to wear badly. As Jim suggested probably best to replace with standard for now.
 
 Re valve springs - no idea tbh - all the aftermarket springs seem to have various colour paint marks!
 
 John