[Question] A or AA Impeller?
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A or AA Impeller?

  1. #1
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    Default A or AA Impeller?

    I have a '78 Glastron/Carlson CV23 with a '70 Ford 429/Berk JE that stuck a valve, broke and bent pushrods, spit up a couple of lifters and lost oil pressure. Rebuild plan includes 460 crank, H-Beam rods, flat top pistons, Lunati 276/284 Voodoo cam, Stealth CJ intake. I just sent a check out for a set of Scott Johnson worked D3 heads; 2.25"/1.76" valves, ported to CJ specs, bowls blended and polished, 7/16" studs and guide plates. Looking to make 450-475hp.
    The JE will be rebuilt over Winter as well; as far as I know it currently has an A impeller.
    Would the bump in power warrant going with an AA impeller? She's used as a pleasure lake boat; some tubing and skiing, and overnighting.
    Thanks!
    1978 Glastron/Carlson CV23; 429, Berk jet.

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  3. #2
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    Default 429 Ford

    Quote Originally Posted by 86NovaII View Post
    I have a '78 Glastron/Carlson CV23 with a '70 Ford 429/Berk JE that stuck a valve, broke and bent pushrods, spit up a couple of lifters and lost oil pressure. Rebuild plan includes 460 crank, H-Beam rods, flat top pistons, Lunati 276/284 Voodoo cam, Stealth CJ intake. I just sent a check out for a set of Scott Johnson worked D3 heads; 2.25"/1.76" valves, ported to CJ specs, bowls blended and polished, 7/16" studs and guide plates. Looking to make 450-475hp.
    The JE will be rebuilt over Winter as well; as far as I know it currently has an A impeller.
    Would the bump in power warrant going with an AA impeller? She's used as a pleasure lake boat; some tubing and skiing, and overnighting.
    Thanks!
    What kind of power are you hoping to make with your engine with all of these mods and at what rpm?

  4. #3
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    I'd like to be around 450-475hp; I don't really want to run over ~5300rpm.
    1978 Glastron/Carlson CV23; 429, Berk jet.

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    Default 429 Ford

    With the old engine what could you turn the A impeller for rpm's?

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    The 429 was turning it ~4200rpm. Engine wasn't well taken care of by the PO. I was hoping it would get me through one season, and it made to Labor Day. Failure issue was with cyl #3. Compression in cyl #1 and #4 was 180psi, cyl #2 had 165psi, so there may have been a head gasket issue there already. All bare cylinders look to be in great shape, very little ridge if any.

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    Quote Originally Posted by 86NovaII View Post
    The 429 was turning it ~4200rpm. Engine wasn't well taken care of by the PO. I was hoping it would get me through one season, and it made to Labor Day. Failure issue was with cyl #3. Compression in cyl #1 and #4 was 180psi, cyl #2 had 165psi, so there may have been a head gasket issue there already. All bare cylinders look to be in great shape, very little ridge if any.
    By going to a Double A you would have dropped the engine rpm's to around 4000. I think I would find out what impeller you have in your current pump, run the new engine and make a selection then.

  9. #7
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    Thanks Greg!
    I'm almost positive it's the original A impeller. PO had her for 27yrs and said he never did anything with the pump, doubtful the original owner rebuilt it in the first few years off the showroom floor.
    Since it'll be rebuilt before the engine goes back in, I'll go with an A impeller, I can always go to an AA later if I need to drop the RPM a bit.
    Last edited by 86NovaII; 10-01-2013 at 07:16 PM.

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