i don't know anything performance wise from experience, but Whipple is literally right up the road from me and they are great guys with hi quality products. All anyone in my area runs (as far as twin screws are concerned) are Whipples. BTW the 2.3 Whipple is more efficient at making power than the 3.4
I think both are good choices for big power. But in order to take advantage of the higher boost that make these blowers shine means running higher octane.
Being from Ohio, I would run E85. There seems to be a lot of locations. :thumbsup: E85 Stations in Ohio
I have seen both 2.8H's and 3.4 Whipples over 800 on E85 running high boost.
please search. more than enough info for you to make a decision right on this site. juiced46 recently even posted results from both those blowers. I think mamouth and crusher.