Carb spacer for my application?

[79elco]

I'm wondering if I could benefit from a carb spacer, I know a lot of people claim that it helps but I'm wondering if anyone has had experience with anything similar. This is my setup:

388
dart sportman II heads
comp xe274h cam
holley street dominator intake
holley 650dp

I have tried reading around but it hasn't really helped me figure anything out. Can my engine benefit from a spacer? I definitely have room (unless I ditch my cowl hood). What kind of spacer should I run if I get one?? Thanks!

 

[LS6 Tommy]

Spacers aren't a set-in-stone improvement. You need to try different ones on the dyno or at the track so you can keep track of data. Every engine is different & even though some things are constant, different engines respond differently to different spacers. Generally a 4 hole spacer increases low end torque, open spacers increase top end power.

Tommy

 

[79elco]

I figured as much but was hoping someone here was running a similar combination and would have some insight. Unfortunately there is no dyno around here to get the car on..

 

[1720]

Try a Super Sucker style spacer. It helped our combo.

http://www.highvelocityheads.com/ss.htm

 

[PRO 48 Fleetline]

Yep im running an HVH 1" super sucker!
They do pick up the throttle signal quicker and improves velocity in helping these single planes!

By profleetline at 2010-11-01

By profleetline at 2010-11-19

 

[MISFITmalibu63]

Try a Super Sucker style spacer. It helped our combo.

http://www.highvelocityheads.com/ss.htm

i also run a 1" aluminum super sucker. i definately noticed a difference!

 

[racecar77]

I also run a 1" HVH Super Sucker. Picked up 27 HP on the engine dyno versus no spacer. Then tried a 2" and it flattened out. Mine is the phenolic version, didn't know they made an aluminum one.

 

[lurchsmalibu]

Is anyone also experimenting with the stub stack on their application with this spacer? http://www.knfilters.com/Racing/stubstacks.htm