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-   -   Timing advice, again! (http://forums.pelicanparts.com/911-engine-rebuilding-forum/864854-timing-advice-again.html)

Tobyb 05-11-2015 02:34 PM

Timing advice, again!
 
Hi Everyone,
I know Cam Timing is a subject that's been really thoroughly documented. I've been lucky enough to use a lot of the tips I've found on this forum.

I am currently coming to the end of an engine rebuild on a 3.2. It's got 964 cams and I'm setting the overlap to 1.25.

I've been using vice grips to hold the tensioner arms in place which works fine. The only thing I'm not sure about is once I replace the grips with the oil fed tensioner the timing has retarded due to the tensioner being not as strong as the grips. The tensioners are brand new and primed.

Should I expect for the tensioner to become a lot stronger once it has oil pressure or do I compensate by setting the timing with the grips not so aggressively clamped.
In other words will the oil pressure work more as a damper rather than a force assisting the tensioner.

Thanks for reading

stormcrow 05-11-2015 06:23 PM

When I did my rebuild from what I remember I did the cam timing with the tensioners installed.

boyt911sc 05-11-2015 07:32 PM

What type tensioners?
 
Quote:

Originally Posted by stormcrow (Post 8619095)
When I did my rebuild from what I remember I did the cam timing with the tensioners installed.


Steve,

You did not mean using the hydraulic fed tensioners when performing cam timing? Or you used the mechanical (solid) tensioners? Which one? Thanks.

Tony

Tobyb 05-13-2015 01:57 PM

Thanks for the replies, I think I'll just set them near as I can to the tensioner pressure and assume the release valve prevents the tensioners getting much more than just damping from the engines oil pressure.
I'm pretty confident that even with the slight retard it's still inside the tolerance, no doubt there will be some movement as the chains stretch and everything beds in anyway.


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