FormulaZR

iTrader: (7)

I'm going to run an Edelbrock Super Vic EFI and FAST 4150 TB on my 383 LS1. I have a 1" spacer laying around - does a spacer to much/anything power wise with an EFI setup?

RobsZ28

iTrader: (3)

I have a Super Victor and 4150 throttle body on my car with a 1" spacing and a nitrous plate. I was told to run as must of a spacer as I have room for. I was told adding the spacer increase plenum volume, which will increase performance. I have no tests without the spacer to see if it changes the performance.

FormulaZR

iTrader: (7)

Makes sense. I may just try both ways and see if there's a change/gain.

red_00z28

iTrader: (14)

FWIW I run a 1" spacer on my super Vic/4150 TB setup.

FormulaZR

iTrader: (7)

Any gains or notice anything different?

red_00z28

iTrader: (14)

Cant say for sure. I ran the spacer from the beginning. I actually used it to prevent from having to drill and tap a spot on the intake for the brake booster vacuum line. The spacer i bought has a 3/8" NPT hole tapped into it. I ran the brake booster to that and the PCV to the large NPT fitting on the fast 4150.

FormulaZR

iTrader: (7)

Gotcha! I won't have as many vacuum lines on mine...