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Discussion Starter #1
Winter project looks to be getting together a normally aspirated tall deck BBC. I am looking for 750 to 800 hp normally aspirated on pump gas. Most of the well known engine builders have something in there stable that fits the bill. Any feedback on Boostpower vs. Pfauff vs. GT vs. Dyno Flow? Any feedback or input would be appreciated.
 

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Maybe I'm a complete idiot, because something just doesn't add up in my head. 800 HP in an 8 cylinder engine is doable, it's a mere 100HP per cylinder. The problem I'm seeing is the "pump gas" part of the equation. Pump gas, as in 93 doesn't seem fitting for the compression ratio required to get 800 HP with or without juice. I guess it could get those numbers on a dyno, but how long will it last? :)hand
 

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I'm famous !
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You could do it with custom made pistons resembling a foldgers can and a stroke like a oil well

Maybe I'm a complete idiot, because something just doesn't add up in my head. 800 HP in an 8 cylinder engine is doable, it's a mere 100HP per cylinder. The problem I'm seeing is the "pump gas" part of the equation. Pump gas, as in 93 doesn't seem fitting for the compression ratio required to get 800 HP with or without juice. I guess it could get those numbers on a dyno, but how long will it last? :)hand
 

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steelcomp was here
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800hp on pump gas is very doable, and with good reliability. You just have to have cubic inches and good parts. Not an inexpensive goal, but definitely doable.
Dynoflow...good prices on parts, but heaard too many bad things about their assemblies.
Don't know about Boostpower. I've heard of them, just don't know anything.
GT...is this GT Performance? Lots of "GT"s out there
Pfaff...well, you're not going to go wrong with them.

Have you decided on a tall deck for a reason?
 

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Just to school myself a little, I figured I'd do some run of the mill comparisons. Big cubes you say? I'd say Chevy does a nice little crate motor, so...

572" 620HP 9.6:1cr 92 octane $13,200

572" 720HP 12:1cr "race fuel required" $13,900
 

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I run a 555ci Chevrolet built by DNE Motorsports. Puts out 802hp at 6500rpm. Oh and it runs on 91 pump gas,compression is 10.52-1. Pm if you have any questions about the motor.
 

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Anything is possible if you get out the prybar and open up your wallet 800 HP on pump gas is very easy to accomplish with the right combination and I have that combo in my stable along with quite a few others PM me and I can give you some info and we ship all over the country off the dyno & on your doorstep BTW 800 HP with less than 550 cubes:)devil
 

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Dirty White Boy
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I have a 598 n/a motor that runs on 93 no problem. It dynoed at 795 @ 5700 on Steve Schmidt's drag race dyno in Indy. It was built by Bill Schumaker in Greenwood, In. He has a bunch of these out and are dead reliable.
cost was over 30k maybe WELL over I try not to remember those things:D

Schumaker Performance
 

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Discussion Starter #13
Thanks for the input. I am not afraid to spend money if the stuff stays together. This is a project for a 22 Stoker that will get a fair amount of lake use. I have a whacker that I run around at 80 plus all day long with, and I want to be able to do that at 100. I have heard great things about Pfauff and GT performance, as I use to follow ski racing. I like cubic inches over forced induction for saving the drive. Most of the larger builders seem to stop at around 598 inches. What are the down sides to going up to say 632? Thanks.
Tommy
 

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steelcomp was here
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Thanks for the input. I am not afraid to spend money if the stuff stays together. This is a project for a 22 Stoker that will get a fair amount of lake use. I have a whacker that I run around at 80 plus all day long with, and I want to be able to do that at 100. I have heard great things about Pfauff and GT performance, as I use to follow ski racing. I like cubic inches over forced induction for saving the drive. Most of the larger builders seem to stop at around 598 inches. What are the down sides to going up to say 632? Thanks.
Tommy
Cost, weight, and it's not necessary.
 

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"BOUGHT NOT BUILT"
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Thanks for the input. I am not afraid to spend money if the stuff stays together. This is a project for a 22 Stoker that will get a fair amount of lake use. I have a whacker that I run around at 80 plus all day long with, and I want to be able to do that at 100. I have heard great things about Pfauff and GT performance, as I use to follow ski racing. I like cubic inches over forced induction for saving the drive. Most of the larger builders seem to stop at around 598 inches. What are the down sides to going up to say 632? Thanks.
Tommy
I ran a 572/ 580/ and a 598 in my 3 force boats all pump gas
all one dominator, good idle, and ran hard,
the 598 made 826hp
 

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Discussion Starter #18
Yes an I/O. Its not that I want to go 100. I want to go 110 plus. I just want to be able to go 100 all day long.
Tommy

Whats everyones take on aluminum blocks. What are the down sides?
 

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Great thread...so lets talk $$$.
Will most 800 hp pump gas N/A engines be in the $30K range? :)st
Or can thay get down to the GM crate 572 cost.
And if not, what's a real number for some good strong parts/package combos inside and out?
 

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"BOUGHT NOT BUILT"
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Great thread...so lets talk $$$.
Will most 800 hp pump gas N/A engines be in the $30K range? :)st
Or can thay get down to the GM crate 572 cost.
And if not, what's a real number for some good strong parts/package combos inside and out?
I think it's about half thatnot dressed out , headers,pumps alt and pulleys
 
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