ORIGINAL: modaddict

Wow, I really got a lesson the last week on the internal workings of the twin screws.

Long story short, Upon comparison - I really liked the design of the KB lower manifold and thought it was superior to the Whipple's so on my 3.4 HO build, I used the KB lower manifold, intercooler, and crossover from my 2.6 HO kit and fabbed it to work with the whipple. This set-up was also done on John Sawyers car.

When John's car got on the dyno it made great power but it really was about 50 hp under what we think it should have been. Dragged our asses for about a week thinking of every scenario why this was happening and after adam talking at length with whipple, it turns out the issue is the whipple actually has a different flow pattern from the way the rotors turn than the KB. This difference actually took away from the whipple performance with the KB other parts.

I really thought/think the KB was superior in this area (lower manifold, intercooler, & crossover) and still think it is but I suppose a lot more goes into these kits than I suspected and there's a lot more to it considering the rotors, how the spin, and overall how it pushes psi.

The moral of the story is in the case of the whipple and KB, it seems they are not completely compatible with one another. Yes, it will work, but not to the best ability of the blower.

On my car, I was looking at losing a whopping 100 rwhp with the mix match set-up.

So I think it is safe to say that the kits are best suited for their own components and mixing and matching isn't too smart.

Well, whipple gave me a killer deal to get the lower manifold, resevior, crossover, and some other stuff so the car will be in tip top shape for Irwindale this thursday. I should actually have some baseline dyno numbers tomorrow.

The other good news is now instead of a KB 'upgrade' kit for sale, I'll have a complete 2.6 HO KB with a lot of goodies for sale so that is cool for me. (and someone else...lol)

Anyway, just thought some of you might find it interesting like I did.

CK

ORIGINAL: Boostaddict

. That's why the fastest twin screw cars are running Whipple's instead of other brand blowers.

You chose wisely young grasshopper! LOL


Speak to you soon. Jared

ORIGINAL: blueherd02gt

There's a guy on another forum saying the same thing about Saleen blowers...

ORIGINAL: Boostaddict

Anyone can say what they feel but to back it up with facts is another thing. Here's the facts.. The fastest twin screw GT500 (Evolution Performance), 03/04 Cobra (JR Lewis), Lightning (Dantes Modular Performance) all run 3.4L Whipple's. Until that changes there's really no other way to look at it.

Jared