Blower or rebuild block?

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Blower or rebuild block?

Post  XF-66 on June 18th 2014, 1:28 am

Have a new NA D1VE short block with 10:1 dished Forged Icon pistons. Pistons sit .008 in the hole. SCJ heads with rocker girdles, SS rockers, bowls blended flowing 370 @ .600, 533ci 4.3 forged crank internally balanced, 6.8 H-beam rods. Studs throughout, HV oil pump and 10qt. custom built pan.
I was going to run a tunnel ram which I have, but have been bitten by the huffer bug! Planning on a 8-71.
This is going in a small light 1/4 mile v-drive boat, plenty of cool water for cooling and block was built with marine clearances. Thinking of running E85 for the huffer. Current ring gap would be an issue right? What about crank snout length? New cam of course, or should I keep the tunnel and start from scratch again with a new build?

I started wrenching for a team with 6-71 on a 454 BBC in the Lucas oil Dragboat series. I know, I know! Seeing the adjustability and tweaking the power with the blower seems to be a real asset in bracket boat drag racing. We either turn it up or down depending on conditions at the track. Would like to do this too with my boat, back it off for the river, crank it up to make some passes in river racer class.

Solid 700hp would be great for now. Then stepping up to a better block as time progresses.

Can this be done with what I have to work with this assembly?

Thanks

Art

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Re: Blower or rebuild block?

Post  dfree383 on June 18th 2014, 2:28 am

You don't need no stinking blower for 700 hp !
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Re: Blower or rebuild block?

Post  XF-66 on June 18th 2014, 9:16 am

I know, I figured 700 would be a good starting point. Then it would grow from there.

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Re: Blower or rebuild block?

Post  4thHorseman on June 18th 2014, 11:33 am

I'm running a 6-71 on a 523ci SCJ headed combo at 10:1 in a '32.  15% OD and seeing 5psi on premium pump gas.  Now I'm at mile high altitude here in Albuquerque which allows me to get away with a  little more compression and robs me of a psi or 2, but If you are only looking to run a few psi especially on e-85 I'd think you'd be fine.

I'm using a stock length forged crank, with a BDS manifold and an 8" drive snout to line everything up... get out past dizzy and timing cover.  Your 8-71 combo may be a little different idk.

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Re: Blower or rebuild block?

Post  XF-66 on June 18th 2014, 10:10 pm

Thanks for sharing your build 4thHorseman. Think I'm going to need a different set of heads to pull this off to work. Something with a larger combustion chamber than I have now. Need to do some more research for now. Thanks.

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