Heat spacer or Carb spacer

[Twinibeam66]

Question i have a 416 build with a RPM intake real close to getting it running, i have a 4 hole super sucker are most of you running a open spacer of any kind under it or are you just using a heat gasket on the intake and then the 4 hole ?  What works best ??

Great forum

Thanks Everybody !!

[GerryP]

Yes, no, maybe, I'll have to check.  And that's he truth.  Spacers are very, very engine dependent.  Of all the varieties, one in particular may really wake up one engine and be a real turd for another similar engine.  I have a variety of spacers for this very reason.  Pay no attention to marketing.  Your engine can't read and is going to do whatever it's going to do regardless of marketing ads.

[Twinibeam66]

Ok thanks for the reply GerryP  i have NO experience with a super sucker so was just wanting to see what had worked for everybody else.

[Falcon67]

I usually run a 4 hole on everything as a default.  The 1" Moroso part is my go-to.  I use it to help reduce heat transfer to the carb.  Other than that, you won't know one way or the other (4 hole vs open) without a dyno or controlled drags trip runs.  I use an aluminum "super sucker" type on the dragster.  It runs alcohol, so heat isn't much of an issue.  It's blue and I like the look of it - there's your science. 

[Twinibeam66]

Thanks Falcon67 i like the way you put that   haha

[chris401]

Question i have a 416 build with a RPM intake real close to getting it running, i have a 4 hole super sucker are most of you running a open spacer of any kind under it or are you just using a heat gasket on the intake and then the 4 hole ?  What works best ??

Great forum

Thanks Everybody !!

I have seen fuel mileage gains stacking the carb over 2".

[Falcon67]

I'll add that I run a 2" 4 hole on the Falcon.  Power? Heat? Testing?  Nah - because with a 1" the scoop is down in the hole of the hood and just looks weird.   

[Ctcobra]

For what its worth, my 428CJ with out of the box Edelbrock heads and RPM intake gained 12 HP on a chassis dyno with a 1" Jomar Powercone spacer.

[machoneman]

For what its worth, my 428CJ with out of the box Edelbrock heads and RPM intake gained 12 HP on a chassis dyno with a 1" Jomar Powercone spacer.

Simply due to straightening out the air/fuel flow I can see why a spacer, the taller the better, may increase hp/torque...but just a tad. As we all know from Jay's extensive intake manifold and spacer tests and as noted above, without dyno or track testing it;s damned hard to pin down actual gains.

Yet, I did finally get the nerve up to cut up my OEM steel hood on my '70 Mach 1 late this Fall, add a 1" spacer and a Boss 429 type scoop and get in some limited driving. Seat-of-the pants told me I did pickup some real power although how much is unknown. Was it the much cooler air admitted from the scoop? Or the 1" 4-hole spacer on a plane intake? Ram air effect at speed? Don't know and don't care as it is faster! 

[Falcon67]

I ran a test in the way-back between a regular 14" air cleaner under a tear drop vs sealing same air cleaner to the hood using a pan and foam.  The change from just the vent and under hood air to sealed air from just the scoop was worth .3 in the 1/8 mile and nearly 2 MPH.  The car was running the equivalent of low 12s at that time.

[Joe-JDC]

Here is an actual dyno test with three spacers.  Joe-JDC


http://www.eatonbalancing.com/2012/09/29/carburetor-spacer-testing/         

[Twinibeam66]

Wow Ctcobra 12 HP thats good i will check that spacer out, also Joe-JDC good article , thanks for the replys. Im thinking i am going to try a 1/2 inch open spacer or one that matches the RPM intake with the 1 inch super sucker on top and start there and see what happens     Great forum appreciate all the help everybody

Twinibeam66 

[Falcon67]

I'm going to go order a 2" sucker now LOL.  Nice article, great test.

[Joe-JDC]

I make my own, and actually have dyno tested them against that red one in Ted's dyno test, and beat it by 1 hp every time.  Joe-JDC

Here are just a few of the ones we have tried on different combinations.

[Joe-JDC]

I make my own, and actually have dyno tested them against that red one in Ted's dyno test, and beat it by 1 hp every time.  Joe-JDC

Here are just a few of the ones we have tried on different combinations.