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SD 309 pump with 383 stroker

Moderator: ATM

SD 309 pump with 383 stroker

Postby FalcSprnt » Mon Sep 12, 2011 9:24 pm

Ron or whomever can chime in on this, what is the best impeller to put in an SD-309 with a Chevy carbd vortec 383 stroker? i beleive it has the "A" impeller in it right now... Thanks!
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Re: SD 309 pump with 383 stroker

Postby ATM » Mon Sep 12, 2011 9:32 pm

Do you know where the engine makes peak torque?
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Re: SD 309 pump with 383 stroker

Postby FalcSprnt » Tue Oct 04, 2011 10:24 pm

not sure ron... jetco put a 9.5 in it a couple years ago when the motor was a 5.7... its a vortec carbed 383
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Re: SD 309 pump with 383 stroker

Postby ATM » Thu Oct 06, 2011 10:19 pm

FalcSprnt wrote:not sure ron... jetco put a 9.5 in it a couple years ago when the motor was a 5.7... its a vortec carbed 383


Does it have a 9-1/2 or an "A" and what RPM does it turn?

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Re: SD 309 pump with 383 stroker

Postby Pittcustomcobra » Wed Jun 12, 2019 11:43 am

I have the same set up and I’ve been looking for the best combo aswell.
So far everyone I’ve spoke with says AA and run a 350.
I’m assuming your fighting cavitation out of the hole?
I was told to run an inducer by a sprint boat guy and I was told to run a AT-312 by another guy.
I run a AA .
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Re: SD 309 pump with 383 stroker

Postby ATM » Thu Jun 13, 2019 8:08 pm

I would run a 9-1/2, it should turn about 4200.

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Re: SD 309 pump with 383 stroker

Postby Pittcustomcobra » Fri Jun 14, 2019 11:36 am

Ok thanks Ron !
Stainless or aluminum affect performance?
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