Quote:
Originally Posted by DJW32
Jody,
Which roots blower would you buy if you had to buy one right now?
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Quote:
Originally Posted by irishlsxer
X2?? More specifically for my personal desires, which roots on the market makes the most reliable boost right now? I love my kb suv. Its uber responsive and BEASTLY. Are the cooling issues to deal with based on like say a gigantic Kenne bell really any less of a problem than turbos?
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I really haven't done all the research yet, as I'm no where near that point. The factory GM ZR1 blower, Harrop, Magnacharger, Whipple, KB are all good blowers and have their own advantages and disadvantages. I'll probably just call Stielow and let him decide for me.
Heat management with turbos is a completely different thing. Turbos are very efficient, they'll make more power per boost level than any of the blowers with the right turbo(s). Air temps look good too comparatively, but managing the exhaust heat of the headers/manifolds and turbo housings requires a lot of work and thought. My Chevelle would get hot at idle with the stock hood and inner fenderwells. The air under the hood could not get out and would just get hotter and hotter, actually raising the engine temp. Removing the inner fenderwells or cracking the hood open and the engine wouldn't break 190 even in 100+ temps and a/c on at idle for 30 minutes. So it was not a radiator/fan issue, it was directly because of the turbos. And I had the headers coated, the downpipes wrapped, and bags on the turbo exhaust housings.
Under power things get even worse. These things can be addressed, but mainly because you mentioned autocross specifically it made me lean towards a regular blower. Instant torque will be better and easier to modulate on a tight course in my opinion.