throttle body spacers
Thread Starter
Heel & Toe
Joined: Sep 2016
Posts: 19
Likes: 0
From: La Crescenta CA
throttle body spacers
Is the throttle body spacer worth anything. They claim some slight increase of HP and mild gas milage increase. I know somebody has asked this already but I maybe didn't go back far enough
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
1. The air path was "wet" (had fuel droplets in it) and had to make a directional change under the throttle plates. A carb spacer could help with this.
2. The plenum volume of a carb'ed intake is pretty tiny and many times, a carb spacer could increase that a meaningful amount.
No, a TB spacer on a MPFI engine isn't going to do squat. The plenum already has a large volume (space) inside it, and the air path is dry. Adding ~3/4" space between the TB and plenum mouth of the plenum is going to add a very small percentage of volume (meaningless) to the plenum area. Those things are wallet-lightening devices.
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Last edited by Tom400CFI; Oct 27, 2016 at 06:20 PM.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
The spacer is 3/4" to 1" thick and fits between the TB and the plenum. For our cars, it does perform one thing...it lightens your wallet so the car weight is less therefore you can go faster.
The spacer and air foil do not accomplish anything. Save your money and spend it on a good tune up.
The spacer and air foil do not accomplish anything. Save your money and spend it on a good tune up.
