Jet size starting point

View previous topic View next topic Go down

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.
avatar
mudtrucker

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

View user profile

Back to top Go down

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 : 401
Join date : 2015-12-31

View user profile

Back to top Go down

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 : 3047
Join date : 2013-09-04

View user profile

Back to top Go down

Re: Jet size starting point

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

Thanks guys!
avatar
mudtrucker

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

View user profile

Back to top Go down

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 : 4797
Join date : 2008-12-02
Location : Roseville, Michigan

View user profile http://www.rmcompetition.com

Back to top Go down

Re: Jet size starting point

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

Oops, I was thinking 1050.

BBFTorino

Posts : 401
Join date : 2015-12-31

View user profile

Back to top Go down

Re: Jet size starting point

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

What fuel are you planning to run?
avatar
FORDMUD

Posts : 285
Join date : 2009-02-09
Location : Meridian MS

View user profile

Back to top Go down

View previous topic View next topic Back to top


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