Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 12-08-2019, 07:01 PM   #1
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,352
Default 390 Holley vacuum advance hose question

Where does the distributor vacuum advance hose attach on a Holley
390 carburetor? Engine is a 1953 V-8 Ford 239 cu. in, engine.

I ask this question as I am wondering how well a stock Load-o-Matic
distributor converted to dual points will work on this engine using a Holley 390.

The intake is an Offenhauser. Thank you.
19Fordy is offline   Reply With Quote
Old 12-08-2019, 07:16 PM   #2
flatjack9
Senior Member
 
flatjack9's Avatar
 
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 3,512
Default Re: 390 Holley vacuum advance hose question

There is no place on the carb that will give a proper signal for a Loadamatic distributor.
flatjack9 is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 12-08-2019, 08:42 PM   #3
scicala
Senior Member
 
scicala's Avatar
 
Join Date: Jun 2010
Location: Detroit suburb, MI
Posts: 2,642
Default Re: 390 Holley vacuum advance hose question

With any later carb you put on the engine it will have too much spark advance on light loads (steady speed cruising) and basicly no spark advance at all when at wide open throttle.
To work correctly with the Holley carb, you would have to change to an aftermarket or modified distributor with centrifugal advance. The Loadomatic has vacuum advance only.


Sal
scicala is offline   Reply With Quote
Old 12-08-2019, 09:43 PM   #4
Tinker
Senior Member
 
Tinker's Avatar
 
Join Date: May 2010
Location: MN/FL
Posts: 5,099
Default Re: 390 Holley vacuum advance hose question

Yep. Get a bubba (or whomever) chevy conversion.
Tinker is offline   Reply With Quote
Old 12-08-2019, 09:57 PM   #5
19Fordy
Senior Member
 
19Fordy's Avatar
 
Join Date: May 2010
Location: Coral Springs FL
Posts: 7,352
Default Re: 390 Holley vacuum advance hose question

Thank you all for the answers.
19Fordy is offline   Reply With Quote
Old 12-09-2019, 08:04 AM   #6
mfirth
Senior Member
 
Join Date: Aug 2017
Location: ohio
Posts: 340
Default Re: 390 Holley vacuum advance hose question

19Fordy, according to CharlieNY you can run a Y Block, 1 inch bore, 94 type carb which improves performance with the Load o matic dizzy. I'm in the process now of ironong out minor tuning issues, but i can feel the difference. 239 c i, 30 over, Max 1 cam & Offy 400 heads.
mfirth is offline   Reply With Quote
Old 12-09-2019, 08:33 AM   #7
chiefdave
Member
 
chiefdave's Avatar
 
Join Date: Oct 2019
Location: Warsaw, MO
Posts: 34
Default Re: 390 Holley vacuum advance hose question

I'm using the same carb/manifold combo on my '49 and had poor performance issues with the stock distributor. Was lucky enough to find a Mallory flat top at a reasonable price and it solved the problems.
chiefdave is offline   Reply With Quote
Old 12-09-2019, 09:25 AM   #8
Bored&Stroked
Senior Member
 
Bored&Stroked's Avatar
 
Join Date: Jan 2011
Location: Central Ohio
Posts: 2,390
Default Re: 390 Holley vacuum advance hose question

I highly recommend that you get a reworked distributor from Bubba - CharlieNY mght make them as well. What you need is an aftermarket distributor with mechanical advance - some units may also have an additional vacuum advance that is designed to take the standard vacuum signal that comes out of the Holley 390.

While I like the looks and smaller size of the original Mallory flat-top distributors, they are getting harder to find -- many guys just use a modified SBC distributor . . . point and parts are cheap and they run great! Bubba can hook you up . . .
Bored&Stroked is offline   Reply With Quote
Old 12-09-2019, 06:47 PM   #9
Charlie ny
Senior Member
 
Join Date: May 2010
Posts: 2,350
Default Re: 390 Holley vacuum advance hose question

19,
I have a couple sbc/8BA distributors on the shelf and a Mallory flat top dis-
tributor as well ready to go. The Mallory was a sbc unit I converted to 8BA..it also
has a mech tach drive.
Charlie ny
Charlie ny is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 06:59 AM.