Carb spacers.......thumbs up or down?
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
Carb spacers.......thumbs up or down?
I'm sure that all of us have seen the carb spacers advertised in the catalogs especially Summit and Jegs. They boast of horse power gains and I was wondering if anyone has had any luck with them. I was looking at the 1/2" or the 1" spacer made by Horton for a holley 4150, have to watch the hood clearance. And which one would you get for that carb?, the open style or the one with the four holes to be used with the Winters aluminum high rise manifold :flag
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Carb spacers.......thumbs up or down? (73jst4fun)
It really depends on the motor. I have read tests where spacer worked well and others where the eng actual lost power. Only one way to find out, dyno with and without but that costs $.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Carb spacers.......thumbs up or down? (73jst4fun)
I use a 1/2 inch spacer on my setup... and it helps performance because of added ram effect.... Well - a 1/2 inch spacer isn't all that big.. Unfortuately - that was the biggest spacer that I could use in order to clear the hood...
Team Owner
Joined: Jun 2001
Posts: 43,136
Likes: 155
From: Thomson Georgia
Re: Carb spacers.......thumbs up or down? (GrandSportC3)
Mine works great......It also cools the gas down and acts kinda like a mini tunnel ram......I also needed it for my Demon Carb to clear the vacum ports . :cheers:
Le Mans Master
Joined: Apr 2000
Posts: 5,202
Likes: 10
From: cincinnati ohio
St. Jude Donor '09
Re: Carb spacers.......thumbs up or down? (73jst4fun)
I use a 1" 4 hole spacer on a dual plane to get my carb up to the airbox. Can't prove it, but it feels like it picked up some grunt, and I know it improved throttle response. :smash:
[Modified by yellow 72, 6:27 PM 7/1/2003]
[Modified by yellow 72, 6:27 PM 7/1/2003]
Le Mans Master
Joined: Feb 1999
Posts: 6,807
Likes: 0
From: Hoosier
Cruise-In III Veteran
Re: Carb spacers.......thumbs up or down? (yellow 72)
I use a 1" 4 hole spacer on a dual plane to get my carb up to the airbox. Can't prove it, but it feels like it picked up some grunt, and I know it improved throttle response. :smash:
[Modified by yellow 72, 6:27 PM 7/1/2003]
[Modified by yellow 72, 6:27 PM 7/1/2003]
I found the quality a bit poor though. I had to file both surfaces flat because ..they weren't. Also had to drill two of the bolt holes oversize so it would fit the studs.
Generally speaking, the open spacers may help high rpm's and the 4 hole spacers may help the lower rpm's.
[Modified by biltogo, 6:23 PM 7/1/2003]
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
