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Old 08-20-2010, 05:56 PM
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What springs and weights should I run

I need real hot rodder advice I bought a used hei after mine cavved.. I have a 355sbc, vortec heads stock, crane cam 216 / 216 .454/.454 max 5500 rpm sweet spot 2500-3000 th400 tranny with 3200 stall (stals less with my setup bout 2500 or less ) ford 9 " 4:10 gears spooler by strange no power brakes or steering. I noticed the distributor I have has the lighteset springs I have ever seen and lightweights What would you mild street racers use in a setup like mine I have timing at 12 before tdc 600 vfm Edelbroxk (man I love my new carb) Any advice would be great.. I was going to put the stock weights from a 305 camaro with the lighter springs to start and see what happpens,,, ALSO if anyone thinks I should run ported vacuum I need advice there too THANX
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Old 08-20-2010, 06:15 PM
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springs

I've noticed the aftermarket kits have lighter weights and the light springs probably are a reasonable match; maybe a bit quick.

It would be quicker and good this thread, to put a timing light on it, and a remote tach or someone inside. Record the deg advance at every RPM until it's maxed out. Then post the results. That gets us in on it!!
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Old 08-20-2010, 07:26 PM
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Quote:
Originally Posted by ghomer
I need real hot rodder advice I bought a used hei after mine cavved.. I have a 355sbc, vortec heads stock, crane cam 216 / 216 .454/.454 max 5500 rpm sweet spot 2500-3000 th400 tranny with 3200 stall (stals less with my setup bout 2500 or less ) ford 9 " 4:10 gears spooler by strange no power brakes or steering. I noticed the distributor I have has the lighteset springs I have ever seen and lightweights What would you mild street racers use in a setup like mine I have timing at 12 before tdc 600 vfm Edelbroxk (man I love my new carb) Any advice would be great.. I was going to put the stock weights from a 305 camaro with the lighter springs to start and see what happpens,,, ALSO if anyone thinks I should run ported vacuum I need advice there too THANX
I have not had good results using the aftermarket weights and cam. If it were me, I would replace the weights w/an OEM set of weights and cam. Be sure to orientate the cam and weights correctly- you can install them "upside down" if you're not careful. The wear marks on the original weights from a Chevy HEI will show you how they go, the cam should be orientated so that it opens the weights as they should be.

Then w/the original weights in the distributor, install a set of medium springs and see what the results are. The HEI distributor is able to provide a lot of mechanical advance, but it's the weights that say just how much of this potential advance is actually available. Different weights/cams provide differing amounts of advance.

You can make a temporary timing tape to let you see how much total mechanical timing you have available, w/o needing a dial back timing light, and to set the total timing, etc..
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