Undersize impellers
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Undersize impellers

  1. #1
    One part at a time... JohnnyNitrous's Avatar
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    Default Undersize impellers

    How far under can you go before the impeller needs replacing? Also, I can't get a bronze shouldered wear ring in the undersize I need, should I go with stainless shouldered or the ultimate wear ring?

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  3. #2
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    I don't like going farther than .025 Max. But people do it all the time. The S/S or ultimate will work fine. How far do you need to go? Jim

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    One part at a time... JohnnyNitrous's Avatar
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    Mine is 0.030 under.

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    I have a bunch of .030 and .040 over ultimate rings been on my parts shelf for years. If you want to use that impeller I'll give you a good deal on a .030 over. PM me.. Jim www.performancejet.com

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    LP-25.com Infomaniac's Avatar
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    Check PM's man

    Quote Originally Posted by Performance Jet View Post
    I have a bunch of .030 and .040 over ultimate rings been on my parts shelf for years. If you want to use that impeller I'll give you a good deal on a .030 over. PM me.. Jim www.performancejet.com

  8. #6
    mo balls than $cents$ IMPATIENT 1's Avatar
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    once i get to .40, its time for a fresh impellor. go with the ultimate wearring love em!

    Dare to be different, if it turns out great you can claim you planned it that way.

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  9. #7
    B1 Racing cs19's Avatar
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    Quote Originally Posted by JohnnyNitrous View Post
    How far under can you go before the impeller needs replacing? Also, I can't get a bronze shouldered wear ring in the undersize I need, should I go with stainless shouldered or the ultimate wear ring?
    If there is a wear ring available that fits the impeller correctly you should be able to run it. Obviously the impeller will be thinner than it was at STD. at .030-.040 under but life goes on and it should not be a problem for a stainless, if its aluminum just get a new one cause its on its last leg anyways.

    It doesnt seem to bother some of these yahoos who go and cut .025 off a $1000 impeller just to make it fit in an $80 wear ring.

    Just like a crankshaft or any other parts, having them being correct size (STD.) is ideal for alot of reasons.
    B1Racing.net

  10. #8
    One part at a time... JohnnyNitrous's Avatar
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    It is a stainless "B" and is prepped by MPD so I would kinda like to use it. I mistakenly ordered a standard bronze from [email protected] without measuring it first. I sent it back and hes gonna take care of it. Thanks for the replies.

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