[Question] Loosing an ounce off a piston
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Loosing an ounce off a piston

  1. #1
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    Default Loosing an ounce off a piston

    I have a KB 572 that lost a rod and needed a new piston that got beat up in the process, among a few other things, It has Diamond 4.5 bore 18 deg 13cc dome ect. So I ordered 2 pistons(so I would have a spare) received them and the weight on the spec card said 625 grams. Wow... when I ordered these I told them that I needed as close to 594 grams as possible. They said no guarantee on the weight.
    So the question is How do I loose 31 grams off these pistons?

    Thanks,
    David
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    There are a number of places that can put them on a diet. I will ask my brother who we have used in the past. You may call diamond and ask if they might do it. I know when we order pistons from Venolia they can do custom lightening for not much more.

    Paul
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    Some guy obnoxious001's Avatar
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    Call Larry at Revco in Long Beach on Cherry Ave. and ask him what is possible. Trust me on this one, he is an expert. I live in Parker now, but all of my balancing goes out there to him.
    Last edited by obnoxious001; 06-23-2019 at 10:07 PM.
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    That is who I was thinking of. Call them.

    Paul
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    Thanks Paul and Barry. This is the second time that Revco has been mentioned in a post. I'm going to check them out, my balance guy is so far behind it's been 3 months and I have 2 more for him to do.
    Anyway the piston I spent about 2 hours on my mill today and copied one of the light pistons. Skirts were real thick and the lower pin bosses had a lot more material to remove. I got it trimmed spot on but was out of "extra" when I got the weight.
    Hey Barry, one of those balance jobs is that Banks turbo 496 I talked to you about the cam shaft. I didn't forget, the guy this build is for is sloooooow. He still hasn't torn the fiberglass tanks out of his Campbell.........

    Thanks,
    David
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  8. #6
    steelcomp was here
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    I've never heard of Revco but I have heard Rebco (in KS) ... and they come highly recommended, but I'd check with Diamond first.
    If God is your co-pilot, change seats!
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    Quote Originally Posted by scott foxwell View Post
    I've never heard of Revco but I have heard Rebco (in KS) ... and they come highly recommended, but I'd check with Diamond first.
    That is hilarious. I was thinking of Rebco, but when he said Revco I figured I remembered it wrong. It was Rebco that we have used before.

    Paul
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  10. #8
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by scott foxwell View Post
    I've never heard of Revco but I have heard Rebco (in KS) ... and they come highly recommended, but I'd check with Diamond first.
    Quote Originally Posted by fc-Pilot View Post
    That is hilarious. I was thinking of Rebco, but when he said Revco I figured I remembered it wrong. It was Rebco that we have used before.

    Paul
    For those not in the know, Revco is owned by Larry Revis. I met him in the late 70's when I worked for Gale Banks and he worked for ABS in Southgate. ABS was doing the balancing for the likes of Ed Pink, Keith Black, and numerous other big names. I don't recall when he opened Revco, but he still does extremely nice work. I know he has done balancing for a number of other shops who have balancing equipment, but had a difficult job.
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    steelcomp was here
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    Quote Originally Posted by fc-Pilot View Post
    That is hilarious. I was thinking of Rebco, but when he said Revco I figured I remembered it wrong. It was Rebco that we have used before.

    Paul
    LOL...I was going to correct Barry and tell him he meant Rebco, but then I saw he gave a specific address and figured he knew what he was talking about. He usually does.
    There's a big difference between Rebco and a local shop that does balancing. Not to take anything away form Revco or Barry's recommendation, but I'm pretty sure Rebco machines Bill Miller's pistons and they're some of the best pistons made. One of their specialties is lightening pistons.
    Last edited by scott foxwell; 06-24-2019 at 11:25 AM.
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  12. #10
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by scott foxwell View Post
    LOL...I was going to correct Barry and tell him he meant Rebco, but then I saw he gave a specific address and figured he knew what he was talking about. He usually does.
    There's a big difference between Rebco and a local shop that does balancing. Not to take anything away form Revco or Barry's recommendation, but I'm pretty sure Rebco machines Bill Miller's pistons and they're some of the best pistons made. One of their specialties is lightening pistons.
    I will have to send you some photos of some of Larry's work. He does the OEM balancing on billet crankshafts for Marine Crankshaft, among others.
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