Re: Carburetor spacers
[Re: 68dodge]
#2176081
10/16/16 03:22 PM
10/16/16 03:22 PM
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Joined: Aug 2003
Posts: 43,116
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,116
Bend,OR USA
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I've used both open and four hole spacers in both hieghts, try it  let us know how much faster your car goes with each one 
Last edited by Cab_Burge; 10/16/16 03:23 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Carburetor spacers
[Re: 68dodge]
#2176089
10/16/16 03:35 PM
10/16/16 03:35 PM
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Joined: Jan 2003
Posts: 20,745
A collage of whims
topside
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,745
A collage of whims
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I've done it on the dyno, and on that particular engine various combinations make some (8-10HP/TQ) difference.
Tried 1" open, 1" 4-hole, 2" open, 2" 4-hole, swapping around between 1", 2", combining the two 1", etc on a 358" SB drag-race motor.
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Re: Carburetor spacers
[Re: 68dodge]
#2176259
10/16/16 07:20 PM
10/16/16 07:20 PM
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Joined: May 2011
Posts: 625
Oakville, Wa
HOTMOPR
mopar
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mopar
Joined: May 2011
Posts: 625
Oakville, Wa
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both of my buddies picked up 15 hp on the dyno with those fancy 2" tapered spacers. One has the Wilson the other is HVH or something like that. One is BBM and one is SBC.
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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Re: Carburetor spacers
[Re: 68dodge]
#2176349
10/16/16 09:01 PM
10/16/16 09:01 PM
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Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
sgcuda
master
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master
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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Spacers are usually a benefit. When you have too much, all that happens is that nothing new is noticed. Open, four hole, 1 or 2 inch changes can usually be felt seat of the pants.
[image][/image]
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Re: Carburetor spacers
[Re: 68dodge]
#2176352
10/16/16 09:04 PM
10/16/16 09:04 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
master
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master
Joined: May 2004
Posts: 3,210
robin hood country
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My 440 RB picked up .15 and 1.5mph going from a 1" 4 hole spacer to a 2" supersucker, runs were within an hour of each other.
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: Carburetor spacers
[Re: 68dodge]
#2176361
10/16/16 09:11 PM
10/16/16 09:11 PM
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Joined: Oct 2011
Posts: 326
Alberta
Wookie316
enthusiast
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enthusiast
Joined: Oct 2011
Posts: 326
Alberta
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Never tested with or without on the dyno but my results are opposite of what you would expect. With both a 1" open and then a 1" taper 4 hole I lost 2/10ths and 4 MPH. Now we have determined this is due to the lack of space between the carb and the hood of my car. I need to go up, but hood choices that are functional and look good for a 3rd Gen Charger are far and few between.
1971 Plum Crazy Super Bee. 572 World Aluminum block with a Cope 727 & Dana 4.10 out back. 9.88 @ 138 with a 1.35 60 NA. Dialed back to 10.0’s. 4000 lbs with me in it.
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Re: Carburetor spacers
[Re: Wookie316]
#2176865
10/17/16 01:54 PM
10/17/16 01:54 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
master
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master
Joined: May 2004
Posts: 3,210
robin hood country
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Never tested with or without on the dyno but my results are opposite of what you would expect. With both a 1" open and then a 1" taper 4 hole I lost 2/10ths and 4 MPH. Now we have determined this is due to the lack of space between the carb and the hood of my car. I need to go up, but hood choices that are functional and look good for a 3rd Gen Charger are far and few between. When i first put the 1050 dominator on my car with a 2" adaptor it lost 5mph at the top end to my 950 hp, took the hood off and it ran a pb. Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: Carburetor spacers
[Re: 68dodge]
#2176923
10/17/16 02:43 PM
10/17/16 02:43 PM
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Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
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Spacers are so combo specific, you just need to try them and see. If you gave us a rundown of your combo, we may be able to tell what it would most likely improve with.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Carburetor spacers
[Re: lockjaw-express]
#2176940
10/17/16 03:03 PM
10/17/16 03:03 PM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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I wonder how the Wilson merge spacer would help a 4150 throttle body with direct port fuel injection?
Would be interesting to try, but expensive if no returns...
Mark Save your money. Will likely make ZERO difference on a direct port car. Plenum spacers have to do with air speed and atomization on cars with carbs. You don't have that issue. Look at EFI cars of various configurations. Throttle body on top, front, rear, side, etc............It simply doesn't matter
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Fix it and retests it and let us know your results then 
