I was thinking of running a 2.7" pulley and 42's and limiting the boost up top as not to run the injectors static. This way the boost will come in sooner and higher then taper off up in the higher rpm range. Just wondering if this will work like it does in theory or, will the pressure differential actually make you loose power down low.Where before you could run more timing and it may make up for less boost. I am also running water meth and may put the dual pass set up back on. Just an Idea. Has anyone done this yet?

 

just get 60's if your going to tune it anyways

 

Had 60's and 2.5" pulley didn't like them.

 

tune time performance(a vendor) in nj, tuned a dudes car for a 2.7 and 42s with full boost, no tapering and claimed to have a little room left over. they posted the charts and all the tuning stuff too. you should contact them if thats what your trying to do. i dont know if that would be harder to do in canada at elevated altitudes though.

 

why didn't you like?

 

Too much heat from the small pulley and the tune was inconsistant. Afr's would move around too much from day to day it would change. Mainly because the 60 are beyond the limit of the pcm and you have to recalibrate the maf and do some voltage multiplier tricks for the ifr rates to work out right. There are probably guys that can tune much better than me and like the 60's This is just my opinion.

 

its not that tough once you nail it down it works pretty nice