Jet size starting point

Go down

Jet size starting point Empty Jet size starting point

Post  mudtrucker on July 24th 2017, 8:45 pm

Could someone give me a good starting point for jet sizes on a Quick fuel fx-4712 1250cfm on a 557. 14-1 compression, ported A-429's, victor 460 intake and .785 int/.761exh 276/287 @.050. All out mud racing 2 1/8 open headers.
mudtrucker
mudtrucker

Posts : 158
Join date : 2009-11-18
Location : Lancaster,Ohio

Back to top Go down

Jet size starting point Empty Re: Jet size starting point

Post  BBFTorino on July 25th 2017, 12:28 am

Gasoline??...I'd probably start with 88's and go from there. Or call QF tech line and get their recommendation.

BBFTorino

Posts : 787
Join date : 2015-12-31

Back to top Go down

Jet size starting point Empty Re: Jet size starting point

Post  supervel45 on July 25th 2017, 1:07 am

https://www.holley.com/products/fuel_systems/carburetors/quick_fuel/drag_race/qfx_series/parts/FX-4712

Stock is 94 no power valves. Hit SPECS on the link and you can see the factory settings.

supervel45

Posts : 3085
Join date : 2013-09-04

Back to top Go down

Jet size starting point Empty Re: Jet size starting point

Post  mudtrucker on July 25th 2017, 7:06 pm

Thanks guys!
mudtrucker
mudtrucker

Posts : 158
Join date : 2009-11-18
Location : Lancaster,Ohio

Back to top Go down

Jet size starting point Empty Re: Jet size starting point

Post  rmcomprandy on July 25th 2017, 10:11 pm

supervel45 wrote:https://www.holley.com/products/fuel_systems/carburetors/quick_fuel/drag_race/qfx_series/parts/FX-4712

Stock is 94 no power valves. Hit SPECS on the link and you can see the factory settings.

YES ... starting with the jets which came in it, would be a preferred starting place.

rmcomprandy

Posts : 5435
Join date : 2008-12-02
Location : Roseville, Michigan

http://www.rmcompetition.com

Back to top Go down

Jet size starting point Empty Re: Jet size starting point

Post  BBFTorino on July 26th 2017, 12:03 am

Oops, I was thinking 1050.

BBFTorino

Posts : 787
Join date : 2015-12-31

Back to top Go down

Jet size starting point Empty Re: Jet size starting point

Post  FORDMUD on July 28th 2017, 12:17 pm

What fuel are you planning to run?
FORDMUD
FORDMUD

Posts : 290
Join date : 2009-02-09
Location : Meridian MS

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum