[Z28usmc]

Originally Posted by LivingCanvas

Z28usmc your also forgetting, a big reason why the kbs and whipples make more power than a ported stock eaton has to do with the fact that they are also much bigger. Your making an unfair comparison

So IOW's you're saying (correct me if I'm wrong here) if there was a 1.7, 2.1, 2.2, 2.8 Eaton it would make just as much power or more?

I would suggest that that math doesn't add up. Do a comparo between the numbers PERCENTAGE wise between the HEaton and the Twin screws. Twin screws still make more HP statistically speaking.

Originally Posted by BLOWNBLUEZ06

I see you have done some homework, however show me a KB powered LSx car making 800rwhp. The Magnuson MP/Eaton TVS product is making the #'s on the LSx engines. I have spent some significant time tuning and logging a 2.8l KB 402 and am not impressed with the #'s all. If efficiency was so high, then tell me why the IAT's are so high. This is even after fixing KB's engineering failure of an IAT setup. With a Magnuson MP112 and spinning the crap out of it, IAT's were 160 degrees at the end of the 1/4 mile. With the KB, they're 250 plus. If you're wondering about my tuning, don't bother. He took it to LMR for a retune because I sent him home to fix some issues and he wanted "the best" They did their best and that car isn't making over 600rwhp. Mustangs may like them, but LSx engines don't. Forget about reading. This is real world. I've seen it many times now and the crappy #'s keep coming from those not too embarrassed to post them.

If you insist on a PD system, TVS is the way to go. Period!

As far as twin screws on LSX's- I fully admist I'm new to the LSX game. I'm far more familiar with modulars. I'm sure as I become more familiar I'll get to know the nuances a lot better and what does and doesn't work.

I will say this though. From what I know regardless of application twin screws flow better, run cooler and are more efficient than roots style blowers. Does that make roots style blowers bad? Of course not- but from all the empirical evidence I've seen first hand and read about Twin screws are the way to go for positive displacement blowers. That's not to say YOUR experience is wrong- maybe you got a bad blower- it happens. I don't know because I wasn't there. But I've personally seen KB's and Whipples make MUCH better numbers percentage wise over the roots blower.

Here is another example. Take the GT500 SuperSnake. There are 3 versions. 1 Heaton, 1 TVS, 1 KB- They each stepped up in HP in that order. Why the results aren't the same with LSX's I couldn't tell you.