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-   -   Porpoising Seavette (http://www.classicseacraft.com/community/showthread.php?t=20227)

McGillicuddy 05-03-2009 12:38 AM

Re: Porpoising Seavette
 
Whoopsie, I missed the part about the bravo being a 4 blade...

Fr. Frank 05-04-2009 06:27 AM

Re: Porpoising Seavette
 
Steve, I don't think a Paxton blower on a high compression motor will work well. My brother had an underdriven Paxton on his '76 Mustang II Cobra. It worked well enough until he had his heads milled and rebuilt the valve train and installed new dome pistons to obtain an 11.25:1 compression ratio. (At that time Paxton reccomended a max comp ratio on the stock Ford 302 of 9.5:1)
His crankcase pressure was so high at high revs he would blow immense quantities of oil out of the breather, and somehow he eventually hydraulic'd the motor with oil blow-by , and had it come apart completely. It even blew the oil pan loose on the bottom.

PipeDreamsMarine 05-04-2009 09:31 AM

Re: Porpoising Seavette
 
Steve.. Have you tried a 4" drive extender, to set the drive back 4". My old Wellcraft Nova did the same thing and the drive extender solved the problem for me.

lost2a6 05-06-2009 09:05 AM

Re: Porpoising Seavette
 
Quote:

Steve.. Have you tried a 4" drive extender, to set the drive back 4". My old Wellcraft Nova did the same thing and the drive extender solved the problem for me.

I don't know if they make one for the TRS drive, I would love to try one if one is available.

Frank, I know about the compression. I could probably get away with a little boost however ideally I would need to cut the compression back to around 8.5:1 for it to work right. That will probably never happen but it doesn’t hurt to talk about it. :D


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