Yeah 351 should be around 600 unless its all stroked out then maybe the 700 would work
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From: Dan O'Reilly
Date: Tue, 19 May 2009 12:40:18 -0600
To: <classicmustang@yahoogroups.com>
Subject: Re: [Classic Mustang] Re: Holley vs Edelbrock
730-750 strikes me as over-carbureted for a 351, isn't it? The
recommendations I've been hearing are in the 600cfm range.
At 12:22 PM 5/19/2009, Paul Stephens wrote:
>--- In classicmustang@
> >
> > OK, I have the feeling that asking this is like trying to discuss religion
> > or baseball, but here goes anyway. Looking for the relative merits of a
> > Holley carb vs a comparable Edelbrock. This is for my '71 Mach, 351C
> > motor. I realize that Holleys had a reputation for blowing out power
> > valves, but their literature all seems to indicate they have "power valve
> > blowout protection" to remove this possibility now. The Holley strikes me
> > as easier to hook up to my existing tranny kickdown & throttle cable.
> >
> > I had almost decided on the Holley (model 80457), but am rethinking
> this in
> > light of a trusted Mustang restorer last weekend telling me how little
> > trouble they have with Edelbrock vs Holleys.
> >
> > Your thoughts (sans emotion, please)?
> >
> > ---
> >
> > Dan O'Reilly
> > 1971 Bright Red Mach 1
> > 2002 Black Deluxe Convertible
> > Colorado Springs, CO
> >
>
>Dan,
>The Edelbrock carb is probably more trouble-free just because it is not as
>easily tunable as the Holley. There are a lot of "Holley Experts" that
>swap throttle bodies and cut choke housings and then complain that their
>Holley is junk.
>Both are good carbs right from the box - IF they are properly selected for
>the application. The Holley is more easily tuned for a specific use and
>application but for most cars it is a bolt-on and go carb. For street use
>a carb that is rated in the right CFM rating with a vacuum secondary is
>the best way to go. For the strip a double pumper in a slightly larger
>size will give the top end performance.
>The biggest draw-back for the Edelbrock is the "air valve" secondary
>set-up. It is nothing more than a spring loaded choke plate installed to
>make sure the secondaries pull fuel when they are opened. This one feature
>is a real restriction in a performance application.
>
>In your application a Holley 730 - 780 CFM vacuum secondary 4150 would be
>the ideal carb - depending on use. I am assuming it is primarily a street
>cruiser. Before deciding that poor running is a carb issue work over the
>tune-up first. Most often "carb" issues are just poor tuning. If your
>application is street only and you want good manners then look at the
>Street Dominator series of Holley. They are good carbs for that
>application and are completely plug and play.
---
Dan O'Reilly
1971 Bright Red Mach 1
2002 Black Deluxe Convertible
Colorado Springs, CO
__._,_.___
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