The Ford Torino Page Homepage
Forum Home Forum Home > Model Specific Forum > General Automotive Technical Discussion
  New Posts New Posts RSS Feed - Carb Spacers and heat shields.
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Carb Spacers and heat shields.

 Post Reply Post Reply
Author
Message
72FordGTS View Drop Down
Admin Group
Admin Group
Avatar
GTS.org Admin

Joined: 06-September-2005
Location: Ontario, Canada
Status: Offline
Points: 5199
Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Topic: Carb Spacers and heat shields.
    Posted: 08-July-2020 at 2:27PM
If have heat soak issues with my Torino if I let it sit for about 30 minutes after shutting it off when hot. I believe the fuel is boiling over. I was thinking of trying out a 1/2" wood or phenolic spacer to help reduce the heat soak of the carb. I know Holley also makes a heat shield, which shields the fuel bowls. I would think the heat shield would be more effective but it isn't the most attractive add-on.

Anyone use either or to help reduce carb hear soak? Any opinions?
Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin
Back to Top
californiajohnny View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 05-October-2013
Location: winlock, wa
Status: Offline
Points: 14408
Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 08-July-2020 at 3:01PM
1/2" solid plastic phenolic spacer... i have them on 3 of my cars... no issues!Wink

1/2" Ported Phenolic Carburetor Spacer 4bbl Fits Holley SB Chevy Ford SBC BBC BB
JOHN
74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION
Back to Top
72FordGTS View Drop Down
Admin Group
Admin Group
Avatar
GTS.org Admin

Joined: 06-September-2005
Location: Ontario, Canada
Status: Offline
Points: 5199
Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Posted: 09-July-2020 at 2:17AM
Thanks John, that's exactly the style I was thinking of running.  What brand and part number is that?  
Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin
Back to Top
72FordGTS View Drop Down
Admin Group
Admin Group
Avatar
GTS.org Admin

Joined: 06-September-2005
Location: Ontario, Canada
Status: Offline
Points: 5199
Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Posted: 10-July-2020 at 4:06AM
I contacted Edelbrock, and they recommended running a 8725 spacer with my 2171 intake.  It's a divided spacer not a 4 hole. I was thinking a 4 hole would work best, but do you guys think a divided dual plane type spacer would work fine?  I am more interested in heat isolation than any performance gains.  But I don't want to lose anything either.

The 2171 intake has a really small mounting surface so requires a carburetor plate.  The Edelbrock tech said the 8725 is the best sized spacer for the intake and I can then drop the carb plate.  He said I could run a the Edelbrock 4 hole spacer, but I'd need to run the carb plate and the spacer. Seems like too much potential for vacuum leaks to me. 

Any thoughts?

My Intake

The stock setup is to use a 2732 carb plate




This is the spacer Edelbrock recommends




Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin
Back to Top
californiajohnny View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 05-October-2013
Location: winlock, wa
Status: Offline
Points: 14408
Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 10-July-2020 at 2:15PM
JOHN
74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION
Back to Top
Rockatansky View Drop Down
Senior Member
Senior Member


Joined: 30-July-2010
Location: On The Road
Status: Offline
Points: 5770
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 10-July-2020 at 3:04PM
how much hood clearance do you have to the filter housing?

think about if you want to maintain the divided plenum or take advantage of some cfm sharing between the 2 sides.
most 2 plane intakes have a notch cut out of the plenum divider, it seems to improve performance significantly.

this is the traditional divider notch




this is the Airgap with it's enhanced notch that is surely a reason the intake performs as it does,
with no user complaints of diminished low end


you could use a short open spacer to create a similar sharing capability, or remove the center strip of the split spacer.
just don't leave anything that could break off, cut it near the edges so what's left is strong enough to support itself Wink
72 GT Ute
   
Back to Top
72FordGTS View Drop Down
Admin Group
Admin Group
Avatar
GTS.org Admin

Joined: 06-September-2005
Location: Ontario, Canada
Status: Offline
Points: 5199
Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Posted: 11-July-2020 at 12:37AM
Thanks guys. Rock, good info. I will have to check my hood clearance. It's too bad there aren't more options for a 400 intake.
Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin
Back to Top
californiajohnny View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 05-October-2013
Location: winlock, wa
Status: Offline
Points: 14408
Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 11-July-2020 at 7:02AM
you could accomplish the same thing by cutting 1/2 way in the bottom of the divided spacerWink since it's plastic you could use an end cut style router bit in a router to cut a notch to give it balance between each planeWink
JOHN
74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION
Back to Top
Rockatansky View Drop Down
Senior Member
Senior Member


Joined: 30-July-2010
Location: On The Road
Status: Offline
Points: 5770
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 11-July-2020 at 7:24AM
nothing a hacksaw blade and a file can't handle Shocked
72 GT Ute
   
Back to Top
californiajohnny View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 05-October-2013
Location: winlock, wa
Status: Offline
Points: 14408
Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 11-July-2020 at 8:10AM
power tools, son, that's where it's at WinkLOL a router is like a hand held milling machine for softer materials Big smile
JOHN
74 GRAN TORINO S&H CLONE
74 VETTE CUSTOM
90 S10 BLAZER 4X4 LIFTED
77 CELICA CUSTOM
75 V8 MONZA SUPERCHARGED
79 COURIER VERT. SLAMMED
75 VEGA V6 5 SPD
70 CHEV C10 P/U
68 MUSTANG FB CONVERSION
Back to Top
72FordGTS View Drop Down
Admin Group
Admin Group
Avatar
GTS.org Admin

Joined: 06-September-2005
Location: Ontario, Canada
Status: Offline
Points: 5199
Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Posted: 13-July-2020 at 1:31PM
Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin
Back to Top
Rockatansky View Drop Down
Senior Member
Senior Member


Joined: 30-July-2010
Location: On The Road
Status: Offline
Points: 5770
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 13-July-2020 at 3:25PM
pretty sure i put George onto the origin of the plenum notch, the first time i saw a Holley 3bbl i knew why it's there. darn thing won't open without the notch! from there i think it was just a lucky accident that it was discovered to improve all around performance with any carb on the manifold. smoother idle and improved TQ through the midrange all the way to an increased redline. the modification got attached to Holman-Moody at some point, they described the mod as being a full 1" deep cut into the divider, that's quite a bit and more than i'd recommend for a driver. i think that huge H-M cut is why George goes conservative on the notch, i wouldn't doubt there's some downside in the low end with the race cut. George has been known to advocate for an intact divider wall whenever possible, i'm not sure what his current feelings about it are today?

and Panteradoug, i enjoy his 1 man arguments for sure

the cool part is if you mod the spacer it's minimal to reverse it
72 GT Ute
   
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.05
Copyright ©2001-2022 Web Wiz Ltd.

This page was generated in 0.063 seconds.