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-   -   Carb Spacers (http://www.hotrodders.com/forum/carb-spacers-120781.html)

400smb_s10 07-24-2007 12:54 PM

Carb Spacers
 
I was told that carb spacers make bottem end torque is this true? And if so would it be worth spend money on one and bolting it on?


Thanks

Ed

richard stewart 3rd 07-24-2007 12:58 PM

Hi Ed,
Yes & Yes
rich

techinspector1 07-24-2007 01:29 PM

If you're using a dual-plane (180 degree) manifold, then a 4-hole spacer may help the fuel/air mixture make the turn into the manifold runners a little better, rather than smashing into the floor of the manifold as it exits the carb bores and creating turbulence. You may see this improvement on the dyno, but I doubt that you'll feel it in the seat of your pants. You will however, add volume to the manifold with a 4-hole spacer, or any spacer for that matter. Generally speaking, the more volume in the manifold, the more power the motor will make up higher and the less it will make down low.

With a 180 manifold and an open spacer, you will effectively change your manifold from a 180 to a 360 degree design and kill off bottom end torque because now, each and every cylinder "sees" the entire manifold volume rather than just half of it like with a segregated 4-hole spacer, so low-rpm cylinder filling will suffer along with low-rpm torque. It's a trade-off. You'll make more power on the high end (assuming you have enough cam to make power up high), less on the low end.

My best advice: Leave it alone and save your money for something more important, like a set of gears or converter.

BIGSKY 07-24-2007 01:31 PM

I installed a Moroso "plastic" 4 hole spacer on my SBC because I was getting heat sink into my Edelbrock. I don't know if it makes more torque because I changed exhaust at the same time, but it did solve the heat sink problem.

techinspector1 07-24-2007 02:06 PM

Quote:

Originally Posted by BIGSKY
I installed a Moroso "plastic" 4 hole spacer on my SBC because I was getting heat sink into my Edelbrock. I don't know if it makes more torque because I changed exhaust at the same time, but it did solve the heat sink problem.

Good point BIGSKY. The most efficient spacer I've seen to prevent heat transferred to the carb is one made from wood and sealed with "bar finish" epoxy.

400smb_s10 07-24-2007 02:27 PM

thank for the replys I was wondering if it works and if it was worth it but apparently not :)

thanks
Ed

BIGSKY 07-24-2007 03:27 PM

Quote:

Originally Posted by techinspector1
Good point BIGSKY. The most efficient spacer I've seen to prevent heat transferred to the carb is one made from wood and sealed with "bar finish" epoxy.

WOOD?! Near fuel and spark? That scares me!

techinspector1 07-24-2007 04:01 PM

Naaahhh, works well. :D

1BAD80 07-24-2007 07:35 PM

Taken for the Knowledge Base,
http://www.hotrodders.com/kb/browselinks.php?c=172

Tuning with carb spacers, :sweat:
http://www.nhra.com/dragster/1999/is...echnology.html

DeathRattle 07-24-2007 08:31 PM

Quote:

Originally Posted by BIGSKY
WOOD?! Near fuel and spark? That scares me!

They are okay. Got one with about 7k miles on it no problems.
Best thing about em is they cost less than the billet aluminum, and probably do more for slowing/stopping heat transfer as already mentioned.

75sprintguy 07-24-2007 08:31 PM

a 4 hole phenolic spacer worked well for my set up my holley was bogging off the line so i put on the 1 inch spacer i felt instant throttle response i didnt have before and no more bog id say dont knock it till you try it :thumbup:

Chevrolet4x4s 07-24-2007 08:55 PM

car craft has a write up on them in the september 07 book had some real good results one added like 20 some hp
Shane

302 Z28 07-25-2007 05:44 AM

They work, in addition to isolating them from engine heat they also help speed up the air/fuel mixture a little.

Vince

Steve karch 07-25-2007 06:02 AM

My 406 made 10 hp and 10 lbft more with a Super Sucker tapered style 4 hole on a Vic Jr intake on the dyno. Defintely works and I'd recommend it.

400smb_s10 07-25-2007 07:30 AM

Well I would have to say 10 hp is 10 hp and it will bring me closer to the allmighty 200 hp from a stock 350 lol

Thanks again for all the replys and information on the spacers its much appreciated

Thanks

Ed


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