Carb Spacer

Monte Howard · 07-29-2013, 09:14 PM

Who makes a good 1" - 2" carb open plenum spacer? I am working on friends bracket car, don't know a lot about the motor. He bought this back halved s-10 and motor as a package. I do know its a 377 sbc .570 ish flat tappet cam. 270-280 @.50, aluminum heads that have no name on them. Nice open plenum Edelbrock intake, Holley 4150.
Not looking for any top secrets. Just want to buy a good carb spacer that works.
Thanks Monte.

mr305 · 07-29-2013, 09:29 PM

Hvh makes a nice 4 hole I use a lot on dirt modified engines seems to average anywhere from 6-9 hp on the Dyno
Aaron Disinger

Jeff Lee · 07-29-2013, 09:40 PM

Comp Cams makes a really nice one with vibration dampener built in. Great part, makes power, not cheap!

pmrphil · 07-29-2013, 09:49 PM

X2 on the HVH spacer - they make a killer piece, 4 hole transitioning into an open, my own preference is the 2" one, we have seen 31hp on the dyno on one occasion with only the addition of the 2" spacer - might have been a bit too small of a plenum added to the change, but 31 is still 31.

Mike Taylor 3601 · 07-30-2013, 08:15 AM

Spacers are a trial and era part,I 've seen cases where they make 25,loses 25 ,or does nothing,it just depends on combo and how close plenum size is to what engine wants.
Mike Taylor 3601

Michael Beard · 07-30-2013, 09:10 AM

x3 on the HVH Super Sucker.

rallye bob · 08-01-2013, 05:09 AM

x4 on the HVH Super Sucker.
I picked up 8 hp over a 1" open with a 1" HVH....

1320racer · 08-01-2013, 10:45 AM

If it's a "super sucker type spacer aka blended spacer you want, the phenolic version available from Canton is a better piece than the plastic from hvh...

https://www.cantonracingproducts.com...CER-BLENDED-1/

That said, I have never seen any improvement on the time slip from any spacer on any car I've owned or tuned in the over 20 years I've been racing however I have used 1/2" phenolic or wood to isolate the carb from manifold heat.

Further, many bracket cars are running a manifold with too much plenum volume for optimum performance and the addition of a spacer just makes it worse.

07-29-2013, 09:14 PM	#1
Monte Howard Member Join Date: Nov 2002 Location: Potomac,IL Posts: 277 Likes: 1 Liked 60 Times in 21 Posts	Carb Spacer Who makes a good 1" - 2" carb open plenum spacer? I am working on friends bracket car, don't know a lot about the motor. He bought this back halved s-10 and motor as a package. I do know its a 377 sbc .570 ish flat tappet cam. 270-280 @.50, aluminum heads that have no name on them. Nice open plenum Edelbrock intake, Holley 4150. Not looking for any top secrets. Just want to buy a good carb spacer that works. Thanks Monte. __________________ Monte Howard 3209 STK, 3208 SS

07-29-2013, 09:29 PM	#2
mr305 Member Join Date: May 2007 Location: Monticello Posts: 160 Likes: 0 Liked 2 Times in 1 Post	Re: Carb Spacer Hvh makes a nice 4 hole I use a lot on dirt modified engines seems to average anywhere from 6-9 hp on the Dyno Aaron Disinger

07-29-2013, 09:40 PM	#3
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Carb Spacer Comp Cams makes a really nice one with vibration dampener built in. Great part, makes power, not cheap! __________________ Jeff Lee 7494 D/S '70 AMX

07-29-2013, 09:49 PM	#4
pmrphil Member Join Date: Aug 2010 Location: CT Posts: 454 Likes: 1,772 Liked 345 Times in 149 Posts	Re: Carb Spacer X2 on the HVH spacer - they make a killer piece, 4 hole transitioning into an open, my own preference is the 2" one, we have seen 31hp on the dyno on one occasion with only the addition of the 2" spacer - might have been a bit too small of a plenum added to the change, but 31 is still 31. __________________ Phil Molski PMR Performance S/C 1623

07-30-2013, 08:15 AM	#5
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,361 Likes: 333 Liked 279 Times in 96 Posts	Re: Carb Spacer Spacers are a trial and era part,I 've seen cases where they make 25,loses 25 ,or does nothing,it just depends on combo and how close plenum size is to what engine wants. Mike Taylor 3601

07-30-2013, 09:10 AM	#6
Michael Beard VIP Member Join Date: Sep 2002 Location: Columbus, OH Posts: 4,060 Likes: 0 Liked 13 Times in 9 Posts	Re: Carb Spacer x3 on the HVH Super Sucker. __________________ Michael Beard - NHRA/IHRA 3216 S/SS

08-01-2013, 05:09 AM	#7
rallye bob Member Join Date: Sep 2006 Location: Genoa, Illinois Posts: 488 Likes: 9 Liked 6 Times in 4 Posts	Re: Carb Spacer x4 on the HVH Super Sucker. I picked up 8 hp over a 1" open with a 1" HVH....

08-01-2013, 10:45 AM	#8
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 2,628 Likes: 160 Liked 759 Times in 379 Posts	Re: Carb Spacer If it's a "super sucker type spacer aka blended spacer you want, the phenolic version available from Canton is a better piece than the plastic from hvh... https://www.cantonracingproducts.com...CER-BLENDED-1/ That said, I have never seen any improvement on the time slip from any spacer on any car I've owned or tuned in the over 20 years I've been racing however I have used 1/2" phenolic or wood to isolate the carb from manifold heat. Further, many bracket cars are running a manifold with too much plenum volume for optimum performance and the addition of a spacer just makes it worse. Last edited by 1320racer; 08-01-2013 at 11:30 AM.