Fuel Efficient Cam Regrinds : General Info

[TestDrive]

Originally Posted by metromizer

Trying to figure out what blank to start from, how far to advance or retard the cam timing is way premature, my advice is to find an expert and give him your business.

Thanks for the post. At this point I'm mostly thinking about the possibility of inexpensively experimenting with timing adjustments to the OEM cam. I'll still be looking into cam regrinding, but it's a low priority.

Think I've heard of Elgin before and believe they're well thought of in performance/racing circles. If I don't hear back from Delta pretty soon, Elgin will probably be next on my list of people to contact.

[dcb]

Originally Posted by Daox

...Even camshaft timing changes requires an aftermarket or custom pulley...

Perhaps generally, but not in all cases, if you know how much you want to advance it. I.E. a Metro cam gear comes off fairly simply and you just have to drill a hole in the right spot to advance it.

There is room to drill many such holes with slightly different offsets relative to a tooth, so just leave the belt cover off while you experiment.

[Daox]

I don't disagree that you could do that. But, I think ideally you use a milling machine with a rotary table to get the timing exact enough. Did you have another idea?

[dcb]

Not sure what you mean by "exact enough". I did mine with an easy cheezy drill press (the kind that hold your drill) after some careful figuring. It works very well and didn't cost a dime.

[Daox]

By exact enough, I'm thinking +/- 1°.

How did you hold the cam pulley in the vise? And, how did you locate the drill hole?