spacer

[mikewb]

anybody use a phenolic carb spacer. do they make difference.

[Redneckchevy]

Well iv seen on horsepower tv ...They used a spacer and put it on a dyno and it showed that it added power....So why not...The way it works makes since it lifts your carb up higher and lets for a bigger gulp of air/fuel...

[HAULIN IT]

Mike, In most cases a spacer will help increase torque & horsepower. This is because it gives additional room to straighten the path for the air to go instead of  crashing into the floor of the intake. The non-metallic ones also help keeping a little heat off of the throttle plate. It is a simple install, so I feel it is worth trying it, however don't think you are going to gain 30 HP from this, on one case this may have happened, but that is probably with a  $130 spacer & after ALOT of testing. Gains of a few ft. lbs & hp is more like it. One thing I would advise is if you have an intake with 4 round holes (stock type), I would only use a  4 hole spacer. Have Fun, Lorne     

[werewolfx13]

They do increase power a little bit IF they're matched to your carb/intake like Lorne said..4 hole intake/carb, get a 4 hole spacer. I've got a few 1" spacers for a predator carb, since a spacer is required for good torque with one..

[joesgarage71]

 Using phenolic helps to reduce carb temp, It helps to insulate the carb. If you have a 4 hole intake use a 4 hole spacer, Open intake open spacer, most spacer tests I have seen, the improvement was at the higher RPM using a 1"-2" spacer.
 Be sure to test the clearance between the spacer and throttle blades, don't need to have her stuck open on start up or on your test drive.

[mikewb]

which one better 1" or 2"

[86 chevy silverado]

Horse power gains are at higher RPM and more beneficial on higher horse power/ RPM motors. You may lose some off idle/ low rpm throttle response, and probably not notice any power gain depending on the performance level of your engine. If any try the 1" spacer.