What Carb Spacer to go with ?

[Doc Voodoo]

Ok there are a number of diffrent carb spacers. What is the best applications for each one ? There is the one with 4 holes , one with a big hole and one split down the middle.

Oh and they can be ethier 1 inch or 2inches tall

 

[dodgestang]

Ok there are a number of diffrent carb spacers. What is the best applications for each one ? There is the one with 4 holes , one with a big hole and one split down the middle.

Oh and they can be ethier 1 inch or 2inches tall

4 hole: All gain is in the low end grunt, good for a phenolic spacer
split down the middle: good for a small increase in low end torque, possible gain in upper RPMS (depending on the intake), good for a phenolic spacer
open desing: good for increase in upper end RPM and good for a phenolic spacer.


The spacers increase plemun volume and allow the air fule mixture more time to atomize (I think thats the word) before hitting the runners. Its always a good idea to run a spacer simple because it helps isolate the carb from the heat of the motor.

As for which one is best for the motor (design and size) that is actually best found out on the dyno and what your performance needs are.

If you don't want to spend money on a dyno T&T you can try these Rules of thumb that I just made:

If you have stock 4 hole intake....just get a 4 hole spacer... 1 inch will be fine

If you have an open plenum intake, drive the car without a spacer...where does it feel like it is lacking...off the line or top end..if it feel sluggish off the line get a 2 hole spacer....if it feels like it doesn't have enough top end get an open design....neither will add much to the seat of the pants dynometer, but the open will give you a few more RPMS while the 2 chamber will give you a few more ft/lbs

It also helps to know what intake you have....and I personally don't see a need for anything 2 inch spacers unless you are building a strip car at which point you would already know this stuff )

 

[Doc Voodoo]

Ok I have the C9OX intake with No carb spacer right now . The Car pulls through all the gears and does not let up untill I let off the GAS. I have not put the new 3rd member in yet so this is with the open rear and 3:55 gears. Not sure how it will feel with the Trac lock and the 3:25 we just put together.

With the 3:55 once I get it into 4th unless I come to a stop there is little need to down shift unless I am going up a hill. For the most part I never even let the clutch out in secound I just shif it from 1st to 3rd and then 4th