Everyone is quick to bag the terracharger or M90 eaton setups on Lexus V8's, but how many people have driven one or experienced other positive displacement superchargers compared to the M90/ terracharger on the 1UZFE?
I'm very happy with mine. The improvement in power has been fantastic, and I don't think you can get more bang for your buck than the M90/ terracharger setup.
M112 is yet to be proven on the Lexus V8, although it should be better in the higher RPM or boost situations. To get the advantage of the M112 may require lowering the compression ratio (and spending a lot more money) to get the percieved advantages over a M90.
Also, The M112 would be running at a lower speed to get the same boost as a M90. . Eaton Blowers have an RPM range where thay are efficient. We may find that the M112 setups at lower to mid boost levels, are running the supercharger too slow to be in their efficiency range at lower engine RPM's. We could end up with no boost at low RPM, bugger-all in the Mid RPM and most of the boost at High RPM, in which case a turbo may have been a better option.
The best thing about my M90 is the boost comes on very early and is all in the 'usable' RPM range (unlike a turbo where you have lag down low untill boost comes on).
It is yet to be proven that the M112 will supply boost in the usable RPM range for engines that are standard compression ratio and running the applicable boost levels.
Conclusions-
Don't rite off the Terracharger/ M90 superchager setups, as they work extremely well, especially on stock engines.
M112 is yet to be proven. Should work well on higher boost, higher RPM applications. May require engine to be decompressed to get advantages. May sacrafice lower RPM boost and drivability.
