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Thread: How much HP can I get with logs?

  1. #1
    Senior Member
    Join Date
    Feb 2009
    Posts
    4,169
    The Advantage has a bbf, closed engine with Hardin logs. I kinda like having a cruiser, and I guess that means keeping the TT logs. Question is, I'll be hitting the wall soon, and the logs will be the reason. How much can I expect get out of this setup before headers are mandatory? Lightnings aren't even close to being in the budget, either. :frown:

  2. #2
    LakesOnly
    Obviously never as good as headers, but for what it's worth, I know a guy with a v-drive w/logs, and he comes out of the hole at 8200 rpm, so...
    ....the logs may also be port-able for improved flow characterisitcs...
    LO

  3. #3
    Tom Foolery
    I'm not sure how much it will apply to you, but for what its worth.
    We did and experiment with my bother-in-laws 21 Howard V-drive. We removed his logs and put basset headers on his boat and found no increase in RPM. He has a BBC with 525 HP.

  4. #4
    Senior Member
    Join Date
    Feb 2009
    Posts
    4,169
    Kinda what I was thinking. Very little if any scavenging, but from strictly a flow point of view, I can open them up a little more. I can install 4" tips, too, but I hate to get further away from original. I'll have to find a point of compromise I'm comfortable with.......

  5. #5
    Blown 472
    Been there done that. I have center rise manifolds and was thinking they were restrictive, bought a set of lightnings and they made no diff what so ever. That and the adaptor plates suck.

  6. #6
    schiada96
    put turbo's on the end of the logs

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