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.

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

Re: Carb Spacer
 

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

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.

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

Re: Carb Spacer
 

x3 on the HVH Super Sucker.

Re: Carb Spacer
 

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

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.