There are several ways to match the carb to the engine. Size, cam,
intended use, intake and wallet.
I have a 1990 5.0L with roller cam (stock) and added roller rockers
(which add some lift).
I believe the best way is to call the manufacturer, in my case Holley,
and ask for a match, based on the above, and then, and most important to
really make the carb work, find someone who knows what they are doing
and have the car dyno tuned.
You need to change jets, timing, spark gap to your car, or you are not
realizing the true potential of the engine. Just using a formula and
installing the carb is not the answer.
I am using the above engine, an F4B, and a Holley Double Pumper 650 cfm.
It is smooth over the entire range, and only stumbles at 1000 rpm or
less when I mash the throttle, as the double pumpers adds the the
secondary gas as opposed to the vac secondary carb.
So is this carb, ie the 650 too big, absolutely not.
Larry
On 6/21/10 9:54 PM, Tod Brown wrote:
> It's a long story, but I have been running a Holley 1850 on my tweaked
> 260 and have been thinking of changing it since the prevailing opinion
> is that it is too much carb for the 260. One of the other carbs I have
> seen that seems like it might work is the Edelbrock 1403/1404 which is
> rated at 500 cfm. Anybody have any experience or thoughts on this?
>
> Tod
> B3820022384LRXFE
> _________________________________________
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