internal mag timing



internal mag timing

Postby chaparral2f » August 27th, 2014, 6:30 pm

Grumpy, I'm sending my magneto off to Joe Hunt to have it tuned up and set up for my engine and I need to know ho much initial advance to have put in it.
Here is what I have: 355 small block (.030 bore) .00 deck flat top pistons.
High output Corvette heads pocket ported and the chamber are polished and sized to 58cc. The valves are stock (1.94"/1.50") The compression ratio
is 11.3 .
The cam specs are, duration 254*/254*. Lift @.050" .488"/.488" Lobe separation 114*
The magneto puts out about 6 amps, but I don't know how much initial advance to have put into it. Any advice will be greatly appreciated.
Thanks
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Re: internal mag timing

Postby 87vette81big » August 27th, 2014, 10:47 pm

It really depends upon if your using pump gas or Race gas for Fuel.
Your cam is pretty radical for the street.
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Re: internal mag timing

Postby grumpyvette » August 28th, 2014, 8:12 am

Id strongly suggest you discuss that with the tech guys on the phone, who are doing your rebuild, concerning your particular combo,and ask for suggestions, but Ive generally use a vertex with a built in 12 degree advance curve


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Re: internal mag timing

Postby chaparral2f » August 28th, 2014, 12:03 pm

Thanks Grumpy, That info was just what I needed. I'll be shipping the mag this afternoon. The old adage, "When all else fails read the directions" should add, "and when that doesn't help ask Grumpy" !
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Re: internal mag timing

Postby grumpyvette » August 28th, 2014, 5:31 pm

I'm always more than happy to help when and where I can.
after all the whole reason I started the site was to help out newer guys so they could avoid all the miss information and mistakes I had to wade thru in learning this hobby's skills, and help guys avoid spending a ton of cash learning things the hard way, about what works and whats a darn waste of money and time!
RELATED INFO
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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