[DeTomaso] Carb question

[Sean Korb]

I think for the most part you might be able to use your 730 Holley, but if
you're going to spin the motor high enough to get 575 HP, you're on the edge
and should go the next size up.

Here's a 100% efficiency chart:

http://www.buicks.net/shop/reference/carb_cfm.htm

There are a lot more charts and converters out there, and they're similar
for the factors they use.  Since you're working at about 150% efficiency
(1.45hp/ci) you can plug in the numbers.  I get 788CFM if you are spinning
to 6700RPM, which I think is a pretty good estimate to pull 570hp.  I think
an 830 puts you right in there.

I hope this helps!
sean

On Fri, Feb 6, 2009 at 3:08 PM, Brent Stewart <bjbstewart at yahoo.com> wrote:

>
> I've recently come into a 392-351C stroker that dyno'd at 570 hp built by
> Bennett Racing. It's complete but doesn't have carb.  I could use the 730
> Holley on my current engine (basically stock 351C with performer intake),
> but i get the feeling that might not be quite enough.  My current thinking
> is a Holley 830 (80509) 4150 HP series with the down-leg booster.  I was
> also briefly considering Dan's Webers, but don't want to cut the deck lid to
> fit them.
>
> I'd certainly appreciate any suggestions you may have as to size and brand
> that would be a good match for this engine.  Here is some additional info
> about the engine if interested:
>
> ======
>
> OEM 351C
> SCAT 3.85 CRANKSHAFT-INTERNAL BALANCED
> SCAT H BEAM RODS
> CUSTOM ROSS PISTONS
> CUSTOM BENNETT HYDRAULIC ROLLER CAM
> FORD MOTORSPORT TIMING CHAIN
> CRANE LINK BAR HYDRAULIC ROLLER LIFTERS
> COMP CAMS PUSHRODS
> HARLAND sharp ROLLER ROCKERS
> CHI 225 ALUMINUM 351C HEADS
> CHI INTAKE
>
> Specs from the build:
>
> Bore: 4.030
> Crank: Scat 3.850 9000 series
> Balance: internal zero
> Cam: 3018F-3039B 112
> Intake Lobe: 242 @ .050 .366LL
> Exhaust Lobe: 250 @ .050 .363 LL
> Lobe separation: 112
> Pistons: Ross
> Rods: Scat 6.00 H beam
> Lifters: Crane link bar hydraulic roller
> Heads: CHI 225 3V
> Pushrods: 7.850 Com cams HD
> Rocker Arms: Harland sharp 4005
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-- 
Sean Korb spkorb at spkorb.org http://www.spkorb.org
'65, '68 Mustangs, '68 Cougar, '78 R100/7, '60 Metro, '59 A35, '71 Pantera
#1382
"The more you drive, the less intelligent you get" --Miller
"Computers are useless.  They can only give you answers." -P. Picasso