Re: [Amc-list] Weber Carbs for the 258

[Todd Tomason <jayscore@xxxxxxxxxxxxx>]

Thanks Frank.  That's good to know.  Now that you mention it, I think they 
were trying to use the bigger Holley.  

Todd

On Wednesday 07 May 2008 07:47, Frank Swygert wrote:
> Definitely NOT "too much carb"!! They were probably talking about the much
> more common and comparatively cheap (about half the price new or used!) 600
> cfm Holley. The only people who have successfully run a 600 cfm vacuum
> secondary carb are racers (usually mud or sand racers) who run the engine
> in the higher rpm range a lot. 500 cfm is considered the max for a 258.
>
> I'm running a 390 it the 258 could definitely use a little MORE carb. The
> big killer I believe is the very conservative stock cam though. After my
> experience with this Holley 390 (vacuum secondary, but blocked to force
> coming in at about 1/3 throttle opening) and Clifford intake I'd start with
> a 450 cfm carb. The only used ones I found were made for a choke coil in
> the intake on V-8s though, and I didn't want a manual choke. No electric or
> carb mounted conversion for those carbs, so the only option would have been
> manual. I know how to use a manual choke, just prefer electric. If I had to
> do it over a gain, however, I'd just use a manual choke.
>
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