HOME FORUM RULES CONTACT
     
   
   

Go Back   CLASS RACER FORUM > Class Racer Forums > Stock and Super Stock Tech

Reply
 
Thread Tools Display Modes
Old 06-18-2012, 03:54 PM   #1
Harry 6674
Senior Member
 
Join Date: Dec 2006
Posts: 589
Likes: 0
Liked 0 Times in 0 Posts
Default Re: Holley float level sight plug holes

They are supposed to be different heights. At least thats they way Holley makes them.
I believe the secondary is higher than the primary.
Harry 6674 is offline   Reply With Quote
Old 06-19-2012, 02:17 AM   #2
bill dedman
VIP Member
 
Join Date: Feb 2002
Location: Conway, AR
Posts: 1,739
Likes: 0
Liked 6 Times in 4 Posts
Default Re: Holley float level sight plug holes

Thanks for that bit of information! I learn SOMETHING new, every day...
__________________
Bill
bill dedman is offline   Reply With Quote
Old 06-19-2012, 01:12 PM   #3
Ed Wright
Veteran Member
 
Ed Wright's Avatar
 
Join Date: Mar 2005
Location: Sand Springs, OK
Posts: 8,132
Likes: 896
Liked 390 Times in 170 Posts
Default Re: Holley float level sight plug holes

Quote:
Originally Posted by Harry 6674 View Post
They are supposed to be different heights. At least thats they way Holley makes them.
I believe the secondary is higher than the primary.
I always use a 7/16" drill bit as a gauge for the primary (front) and 3/8" for the secondaries.
__________________
Ed Wright 4156 SS/JA
Ed Wright is offline   Reply With Quote
Old 06-20-2012, 02:18 AM   #4
bill dedman
VIP Member
 
Join Date: Feb 2002
Location: Conway, AR
Posts: 1,739
Likes: 0
Liked 6 Times in 4 Posts
Default Re: Holley float level sight plug holes

Thanks, Ed; I am sure that's good advice! I'll follow it!!!
__________________
Bill
bill dedman is offline   Reply With Quote
Old 06-20-2012, 09:25 AM   #5
BlueOval Ralph
Banned
 
Join Date: Feb 2008
Posts: 852
Likes: 0
Liked 0 Times in 0 Posts
Default Re: Holley float level sight plug holes

If its a square carb like a 750 same pri & sec vent and throttle blade size I make everything same float levels air bleeds and jets same
BlueOval Ralph is offline   Reply With Quote
Old 06-22-2012, 03:50 AM   #6
bill dedman
VIP Member
 
Join Date: Feb 2002
Location: Conway, AR
Posts: 1,739
Likes: 0
Liked 6 Times in 4 Posts
Default Re: Holley float level sight plug holes

Ralph; it IS a 750... double-pumper with 4-corner idle jets. Going on a high-boost, turbocharged slant 6....

Thanks for the advice!!!


Bill
__________________
Bill
bill dedman is offline   Reply With Quote
Old 06-22-2012, 10:13 AM   #7
BlueOval Ralph
Banned
 
Join Date: Feb 2008
Posts: 852
Likes: 0
Liked 0 Times in 0 Posts
Default Re: Holley float level sight plug holes

A good starting point with no Power valve is
Mj 77 or 78
HS bleed .026
Idle bleed .067 or .070
Idle feed rest in metering block .036 to .039
Set idle so blades are just below transfer slot.
At least .070 holes in throttle blades
BlueOval Ralph is offline   Reply With Quote
Old 06-22-2012, 03:24 PM   #8
bill dedman
VIP Member
 
Join Date: Feb 2002
Location: Conway, AR
Posts: 1,739
Likes: 0
Liked 6 Times in 4 Posts
Default Re: Holley float level sight plug holes

Quote:
Originally Posted by BlueOval Ralph View Post
A good starting point with no Power valve is
Mj 77 or 78
HS bleed .026
Idle bleed .067 or .070
Idle feed rest in metering block .036 to .039
Set idle so blades are just below transfer slot.
At least .070 holes in throttle blades
Thanks Ralph.

This carb has a boost-referenced power valve that will be operational.

The cams for these turbocharged engines have very little duration (210/210-degrees @ .050"-lift,) and are ground with 115-degrees of lobe separation, so they idle like a stocker.

I guess turbo engines don't much like overlap...

I don't think that I'll need any holes in my throttle butterflies, will I???

Thanks for any information!!!
__________________
Bill
bill dedman is offline   Reply With Quote
Old 06-22-2012, 10:39 AM   #9
Harry 6674
Senior Member
 
Join Date: Dec 2006
Posts: 589
Likes: 0
Liked 0 Times in 0 Posts
Default Re: Holley float level sight plug holes

Quote:
Originally Posted by bill dedman View Post
Ralph; it IS a 750... double-pumper with 4-corner idle jets. Going on a high-boost, turbocharged slant 6....

Thanks for the advice!!!


Bill
Are you doing the Hanger 18 mods to the carb?
Harry 6674 is offline   Reply With Quote
Old 06-22-2012, 03:16 PM   #10
bill dedman
VIP Member
 
Join Date: Feb 2002
Location: Conway, AR
Posts: 1,739
Likes: 0
Liked 6 Times in 4 Posts
Default Re: Holley float level sight plug holes

Harry,

I had a friend of mine who has a successful turbocharged 225 slant six in a '70 Dart (11-flat at 122 mph running into a 15-mph headwind, at 3,300-pounds,) modify this carb for me for blow-thru, and I am not aware of what he did, beyond building a bracket that was needed, for some reason, to locate a boost-referenced power valve. The primary float had to be relieved, somewhat, to clear that bracket.

I am sorry I don't know more to tell you. I am not familar with the "Hangar 18" mods, whatever they might be. Can you enlighten me please?

Thanks for your interest!
__________________
Bill

Last edited by bill dedman; 06-22-2012 at 03:19 PM.
bill dedman 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


All times are GMT -4. The time now is 06:26 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.