Which throttle body should I switch to, 75mm or 85mm?

Mike Puckett

SCCoA Member
I'm getting ready to do a throttle body and cold air intake upgrade and I'm not sure which one will work the best. Is the 85mm too big for my mods? Or just right? Check my member page for my mod list since it"s too long to list here. Now that I've run a 12.71 I'm looking for a couple of more tenths and want to settle in around the 12.5 mark. Whichever one I go with I'll have my 'chip' retuned to match. It looks like all the suppliers are out of the 75mm's for right now but will it produce any significant difference over my current 70mm? Has anyone done a comparison of the 2 performance wise?
 
I would upgrade the intake manifold and plenum first.
before doing another throttle body upgrade.
:)

Randy
 
Last edited:
That's upgraded already Randy. I've got the MP intake, S-model blower, the IC tubes are extrude honed, I'm making a better double IC. I'd like to do a lower intake as well but I'm not sure what's available.
 
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