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Thread: Redtop on Bluetop?

  1. #1
    Join Date
    Jan 2014
    Location
    North Van
    Posts
    259

    Redtop on Bluetop?

    Hey all,

    Just curious, I'm sitting here twiddling my thumbs trying to decide how to proceed with this... I just picked up a redtop motor (smallport) and currently have a bigport bluetop in my wagon. I'm trying to decide what route to take... fix the (probably but not 100% sure) spun bearing on the redtop, or pull the head off and just install it on my working and operational bluetop block.

    I know I'd lose a bit of compression by going the latter route, but it seems like the quicker easier route.... (because I'm lazy, haha) And who knows, maybe when I pull apart the bottom end of the redtop, I will find something ugly...

    Is there anything I'm not considering here? What route would you recommend?
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  2. #2
    Join Date
    Feb 2011
    Location
    Kumamoto Japan
    Posts
    2,515
    Pull the red top apart and see what it's like. I would take a red top on full red top electronics any day. The big port doesn't have as high compression, but it also doesn't have a knock sensor or oil squirters either, not to mention a better block over all. It's a difference if almost 40hp! Do the extra work, it's worth it.

  3. #3
    Join Date
    Jan 2014
    Location
    North Van
    Posts
    259
    Oh, both would be running dual sidedrafts... so the ECU thing wouldn't be an issue. But yea, you're probably right. I should just pull the redtop apart and see how it looks.
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  4. #4
    Join Date
    Sep 2011
    Location
    Vancouver
    Posts
    241
    40hp?

  5. #5
    Join Date
    Feb 2011
    Location
    Kumamoto Japan
    Posts
    2,515
    Sorry, I was thinking of something else, it's late here... Still it's like 20hp more.

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