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-   -   Carb Jetting ? (https://classracer.com/classforum/showthread.php?t=32968)

cal 04-21-2011 10:12 PM

Carb Jetting ?
 
OK I need some opinions,or what you are running for carb jets.

Motor is a 468, 13 to 1 compression, 714/714 Lift roller, BB 2 Plus heads, Team G intake, Quick fuel 1050 carb.

I changed the plugs tonight and they were a little whitish, I have 92 square in it now.

I guess I'll need to go to 94 square or higher?

any comment will be apperciated.

Cal
HR 177X

cad 04-21-2011 11:33 PM

Re: Carb Jetting ?
 
http://www.dragstuff.com/techarticle...ark-plugs.html

Keith 944 04-22-2011 09:15 AM

Re: Carb Jetting ?
 
is that a 1050 dominator style or a 4150? i have both, i use a little more jet in the dom. 92 sq. 86sq in the 4150. every engine is slightly diff. but you seem very close....

Dave Steltz 04-22-2011 11:31 AM

Re: Carb Jetting ?
 
When I ran a Dominator, seemed like the 92 range was good for most smaller BBC's like yours...Maybe invest in an EGT so you can see a little closer, but you should be very close...

63corvette 04-22-2011 04:09 PM

Re: Carb Jetting ?
 
Another important part of jetting is what the adjusted altitude you are running at is and what squirter you use.
You can run a leaner jet and use a bigger squirter to keep it from stumbling at the starting line but you may still be lean on the big end.
Consider more than jet size alone.
My 2 Cents
Rick Cates

wayne sipos 04-22-2011 07:17 PM

Re: Carb Jetting ?
 
you could try a smaller hi speed air bleed

Ron Finney 04-22-2011 09:09 PM

Re: Carb Jetting ?
 
I had almost the exact same combo except mine was 461 cube....I ran 94 square and have even had 96 in the back in better air....

Good luck!

cal 04-22-2011 09:48 PM

Re: Carb Jetting ?
 
Thanks Guys

I Put in a fresh set of plugs tonight, and I guess I'll fatten it up a little tomorrow and see what happens. :)

Cal
HR 177X

jmarkaudio 04-24-2011 10:07 PM

Re: Carb Jetting ?
 
Jet it for best MPH, that will be the most HP. You can go down one jet size from there and gain a little consistency. Jet requirements can vary depending on the ability of the engine to burn the fuel used, and different fuels can require different jets. The Dragstuff plug article is a good one to learn plug reading.


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