Whipple 2.9 Owners - Upper Pulley Size/Boost Level?

[Streetpwr281]

Installing 2.9 Whipple kit on my 13' GT500. Stock lower pulley. LTs/H-Pipe/JLT Super CAI/72mm L&M TB. What upper pulley sizes make approximately what level of boost?

What do you run for an upper pulley size and what is your peak boost?


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[1 Alibi 2]

May help, may not, 30 looked & no posts.
2.9 on my 11, 3" pulley, 1 3/4" LT's, catted X pipe, Whipple 123mm CAI, FRPP mono, stock lower pulley.
Boost @ 19.4

 

[Streetpwr281]

May help, may not, 30 looked & no posts.
2.9 on my 11, 3" pulley, 1 3/4" LT's, catted X pipe, Whipple 123mm CAI, FRPP mono, stock lower pulley.
Boost @ 19.4

Thanks! I ended up sending a DM to Jim w JDM and he indicated 3.0" upper/stock lower on my 13' w listed mods will produce ~ 18psi. Perfect for my pump gas tuned daily driver. I can reserve adding a IW 10% lower for a future round of mods.


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