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Old 12-28-2010, 10:11 AM
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DIY crank trigger Distributer?

I'm bound and determined to run a Cam Correct variable timing chain on a sbc.
Generally it's recomended to run a crank trigger ignition with this timing chain that advances or retards the camshaft accourding to rpm. Is there a way to wire a standard HEI or ready to run distributer to work with a crank trigger?

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Old 12-28-2010, 10:42 AM
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If you want to run a crank trigger I'd just go to a dis ignition. Easier, cheaper, better.
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Old 12-28-2010, 12:41 PM
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Quote:
Originally Posted by ap72
If you want to run a crank trigger I'd just go to a dis ignition. Easier, cheaper, better.
Cheaper, Really? Are we talking a used OEM system? I'm not against it, it's just I don't see how since I have several types of standard chevy distributers.
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Old 12-28-2010, 12:58 PM
How fast is fast enough?
 
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Megajolt and a used oem system.
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Old 12-28-2010, 01:23 PM
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Quote:
Originally Posted by upstand2
Is there a way to wire a standard HEI or ready to run distributer to work with a crank trigger?
Yes, there is a way to make this work. Basically you would use the distributor rotor and cap as a rotary switch and trigger the ignition module from sensors on the crank instead of from the star wheel on the distributor shaft. Olds did this in 1977 on the Toronado with a system called MISAR. Despite that, I still agree with others that you should just go with the DIS or equivalent and be done with it.
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Old 12-28-2010, 01:49 PM
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Myself and a friend have tried the Cam Correct stuff....don't waste your time(or money), it doesn't work like the ad copy leads you to believe. I've even hunted down dyno info after we ran it, several guys have dyno'd with it and report it doesn't live up to the makers claims.

Basically comes down to the valvespring pressure through the lifter against the cam lobe keeps the chain tight on the pull side, and is a force far greater than the little spring loaded shoe can manage to exert.

if it actually worked, it would be in widespread use, everyone would know about it, just like thay know about every other speed part or tip that helps make power. The idea has been around in various forms since the 60's(my uncle tried a spring loaded cam gear(for variable timing) on his Sprint car in 1971, didn't work then either. They ended up just bolting it solid and using it like the adjustable gear(for easy cam degreeing. in a modern belt drive timing set.

I've still got a Cam Correct in the bottom of my tool box, make you a heck of a deal on it, pair it with a intake "Tornado" and you'll be so fast you will end up in a different time zone every time you jazz the gas pedal. Don't forget the fuel line magnet to a"align" the fuel molecules
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