Holley float adjustment??

May 15, 2018, 09:06 AM

If using a electric fuel pump can u set the floats correctly just using the pump or should the car be running to get it right???Also using screw in jet extensions with a Holley plastic notched float, hear the slip on plastic extensions are a better deal whats your opinion.

May 15, 2018, 05:24 PM

Ron Gusack

I set them by taking the bowl off, turning it upside down and setting the toe of the float to 7/16". Some set the primary to 7/16 and the secondary to 3/8. I like the metal jet extensions that are oval shaped at the open end.

May 15, 2018, 05:26 PM

johnracer

Engine should be running to adjust floats correctly.

I've used both styles of jet extensions and actual extended jets without and noticeable performance changes. Use what you have and you'll be fine.

May 15, 2018, 05:28 PM

1320racer

May 15, 2018, 09:20 PM

JCDRAGS

Ed, what is wrong?????

May 16, 2018, 01:12 PM

Ron Gusack

quote:
Originally posted by JCDRAGS:
Ed, what is wrong?????

Using the site plug hole is not a very good way to set floats mainly because the holes are in different locations on the bowls. The other issue is that setting the level to the bottom of the hole is usually too low for a drag car. Just use a drill bit to measure and turn the float upside down. You'll be good.

Here's a pic of the extensions that I like best.

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This message has been edited. Last edited by: Ron Gusack,

May 16, 2018, 02:47 PM

Ed. Still a prick after all these years. LOL

May 16, 2018, 03:04 PM

1320racer

Wes. Still a clueless nobody after all these years. LOL

May 16, 2018, 03:07 PM

Hell ED, everybody's somebody. Have a nice day.

May 17, 2018, 10:59 PM

JCDRAGS

Ron Gusack, wo what your saying is use a 3/8 drill bit for the front primary bowl and a 7/16 bit to set the secondary bowl. will that get u the correct height or will you still have to adjust it.

May 17, 2018, 11:08 PM

JCDRAGS

Ron Gusack you have a PM.

May 18, 2018, 04:50 AM

1320racer

Do the following...

1. take the carb bowls off, invert them and set the floats so that a 7/16" drill bit laying on the roof of the bowl just touches the hanging float.

2. set your fuel psi to 6.5 psi and do NOT use a liquid fill gauge.

3. go race

May 18, 2018, 05:44 PM

I.P. Dailey

Edwad, the Internet Idiot know it all Spitting

This message has been edited. Last edited by: I.P. Dailey,

May 18, 2018, 08:29 PM

JCDRAGS

1320 Racer , Ed, are both fuel bowls set up with a 7/16" drill bit or is the front primary 3/8". Been told so many ways, fuel is in middle of sight plug now, when i shut if off and open sight plugs it will slosh over bowl threads when i shake the car.

May 18, 2018, 09:02 PM

1320racer

both bowls. we haven't set the float level using the sight glass since 1991...

May 18, 2018, 10:33 PM

irf3

I set mine at .590

May 19, 2018, 02:47 PM

JCDRAGS

quote:
posted May 15, 2018 05:26 PM Hide Post
Engine should be running to adjust floats correctly. True or not true!!

I've used both styles of jet extensions and actual extended jets without and noticeable performance changes. Use what you have and you'll be fine.

May 20, 2018, 09:15 AM

jmarkaudio

quote:
Originally posted by JCDRAGS:
quote:
posted May 15, 2018 05:26 PM Hide Post
Engine should be running to adjust floats correctly. True or not true!!

I've used both styles of jet extensions and actual extended jets without and noticeable performance changes. Use what you have and you'll be fine.

That doesn't hold for all cases, I've run into threaded extensions that were smaller than the jet being used. And they wondered why it wouldn't get rich enough...

For Holley jets the best are the Holley 122-5002, a tube that the jets slip into. If you have access to a lathe you can make some with thin wall brass tube, 11/32 x .014 wall.

Mark Whitener
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