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  • internal timing ring

    Its been a long time, but Im getting back to work on the 3.5l camaro project. The crank will be reground and balanced soon, so before I give the go-ahead for the final cut, I would like to ask once more...

    Does anyone sell, or can CNC an internally mounted timing ring to be fit on a 3500 steel crank?

    If not, then I wil have to modify an external TCE ring to fit a rwd style front cover and f-body crank pulley and go ahead with the machining.

    (BTW) It been a while, hows everybody doing?
    Last edited by Driver_10; 04-09-2010, 07:16 AM.
    Took a break from working on the car. Got some better tools, got a better shop, got a better job... Its time to burn metal!

  • #2
    Joseph Upson would be the person to ask about an internal ring. I thought he was planning to have some more made.

    An alternative would be to remove the stock rings, cut off the ring locating lip and add the notches to the 3500 crank before you have it balanced. From the measurements I have taken, a stock 7X CPS would then have a .050 gap. Grinding a little from the CPS mounting pad on the block would bring the gap down and increase the signal strength to the ICM.

    I had considered offer this service but when you factor in shipping, labor to R&R the crank, gasket costs and convenience it made more sense to just make an external bolt-on trigger.
    MinusOne - 3100 - 4T60E
    '79 MGB - LZ9 - T5
    http://www.tcemotorsports.com
    http://www.britishcarconversions.com/lx9-conversion

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    • #3
      The last time I mentioned looking into this I didn't get much of a push from what I recall. I've been working on my own build as of late and just picked up the narrowed connecting rods this morning.

      I would consider looking into having the crank pattern cut into the 3500 crank while having it reground. The problem with that is the assymetric perimeter around the trigger wheel area which will change the crank's balance and possibly call for the addition of heavy metal. My crank came up a little more than a pound lighter after the regrind and in addition to that my pistons and rods are lighter than the stock parts, so cutting the trigger wheel into the crank if you can find someone to do it would offer more benefit to reciprocating and rotational weight reduction.

      If I can spare the cash I'll look into getting another batch cut but I can't do it right away.

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      • #4
        Originally posted by CNCguy View Post
        Joseph Upson would be the person to ask about an internal ring. I thought he was planning to have some more made.

        An alternative would be to remove the stock rings, cut off the ring locating lip and add the notches to the 3500 crank before you have it balanced. From the measurements I have taken, a stock 7X CPS would then have a .050 gap. Grinding a little from the CPS mounting pad on the block would bring the gap down and increase the signal strength to the ICM.

        I had considered offer this service but when you factor in shipping, labor to R&R the crank, gasket costs and convenience it made more sense to just make an external bolt-on trigger.
        How much to do the machining services if the crank is shipped over?
        Took a break from working on the car. Got some better tools, got a better shop, got a better job... Its time to burn metal!

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