Remember that carbies flow both fuel and air in a vapor/mist. I can't see how putting a spacer behind your airflow meter would help. If anything, getting the meter closer to the intake would assist in response. Yes?
"Keep it Real"
"Big D" Dion.
Ford XE Green n Gold 4.1L IL6 Nitrous Assisted. Best time to date: 14.338 @ 98MPH
Mazda 626 Faded Blue 2L IL4 NA Diesel!
They do work on EFI engines. They go between the upper and lower intake manifolds and do two things. Firstly they slow the heat soak to the upper manifold resulting in a cooler intake charge. Secondly they increase the intake length by 1/2" or 1" depending on which one you get, and increases torque. Around 5rwkw increase has been tested on a dyno. Prices are about $175 for the 1/2" or just over $200 for the 1"
Funnily enough, I was just re-reading a Wheels article on the development of the EL GT engine, they used a 13mm phenolic spacer and Rolf Glenk (the engine developer @ Tickford) said it was worth 1kw and 9nm of torque.
Not sure if I would consider it good bfyb at the prices mentioned by EDXR8.
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