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Forums->Hot Heads Tech Talk->750 cfm carb ?

oldboy
750 cfm carb ?


Hello,
I have been enjoying my 392 powered 46 Plymouth for years. Motor is .060 over, 10.5:1 , mild Howards cam., making 405 cu.in. Changed gearing awhile back from 3.0:1 to 3.55:1. Woke it up even more from a stand still.
Currently running a750 cfm Edelbrock carb, with a bypass regulator.
Using Autolite 65 ‘s
Feels like throttle responce is crisp, but tends to foul out the plugs.
Is this too much carburetor for this motor?
Adjusted the settings per Edelbrock recommendations.
Thanks
Russ
  user offline
on: Sun 05 of Aug, 2018 [19:36 UTC] reads: 549

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oldboy
user offline
Re: 750 cfm carb ?
on: Tue 07 of Aug, 2018 [11:49 UTC] score: 0.00
> Hello,
Well im thinking definitely not blowbuy. Doesnt use a drop of oil, probably not 6000 miles on it since a rebuild.
Perhaps a rejet might be a wise choice.
Thanks for advice

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George
user offline
Re: Re: 750 cfm carb ?
on: Tue 07 of Aug, 2018 [22:08 UTC] score: 0.00
> Perhaps a rejet might be a wise choice.
> Thanks for advice

That might help. technically it's trying to be a band aide on the problem if the carb is too big.

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Jack
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Re: 750 cfm carb ?
on: Mon 06 of Aug, 2018 [15:37 UTC] score: 0.00
I agree that 750 is to big.
But fouling plugs could be to big of jets. Or oil blowby.

author message
George
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Re: 750 cfm carb ?
on: Mon 06 of Aug, 2018 [03:44 UTC] score: 0.00
The usual formulas says 650 is right.


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