what is a tbi spacer? whats does it do? will having one increase hp and tq?

 

What is a TBI spacer and does it add power?

A TBI spacer is just what it sounds like. It is a piece of plastic, wood, phonelic resin, or aluminum that bolts in between the TBI unit and intake manifold. It helps increase the intake manifold plenum size and is supposed to add power. It also acts as a thermal insulator between the TBI unit and intake manifold. Resin and plastic materials will be more effective than aluminum and will not conduct as much heat into the TBI unit. Whether they add power or not has yet to be dyno proven but I did not feel anything when I installed one on my car. The only purpose I bought one was to raise my drop based air cleaner off of my distributor. A TBI spacer usually requires a little tweaking of the throttle brackets and TV cables (for auto cars only) to keep it from pulling the throttle open. They are expensive and not worth the hassle for little to no power increase as well as a potentially difficult mod for a first time modder.

 

yup, he pretty much nailed it. no noticeable difference installing one. Just like underdrive pulleys, or relocating the IAT away from the motor....