Originally Posted by meddle

When he bought them out, he should have called it reacharound motorworks.

Originally Posted by LUPE

Nothing fishy about it, you give them your twin turbo car and $2,200 and then pick up your single turbo car. They build everything in house.

So how much is the kit if you dont want them to install it??

Originally Posted by dhahlen

His name is Robert Paulsen....

Originally Posted by LUPE

what in the ****

Originally Posted by EFINI_RX-7_RZ

Ok, from the creator of the AF61R himself, here are the specs (he posted them on 2 other threads, should have posted them on this thread, too):



Now, this is going to be SO MUCH MORE constructive than what has been done up to this point on this thread: people, analize the specs on this turbo, you WILL find that, indeed, it is a quite smart piece of hardware. Both turbine and compressor are larger than GT35R's, but not by much, in fact, it fits nicely between the GT35R and the GT40R size-wise. But the smartest thing about it lies in the fact that it uses a "small "Q" trim turbine". Remember the teachings from Mazda and Hitachi about best turbines for rotaries: the easier flowing the turbine is, the higher the volumetric eficiency achieved, and the straighter the blades on the turbine (nearest to perpendicular to flow), the easier it is to spool up. This is because rotary turbine logic is somewhat opposite piston turbine logic: instead of a smaller, more restrictive turbine helping fast spool up as on piston engines, a larger, more open turbine actually achieves faster spool on a rotary engine, while helping flow at the top end at the same time . The explanation for this lies on the nature of the rotary engine: its flow speed is much slower than on piston engines at the same given speed (at least 2/3 as slow), this given the fact that air moves at 2/3 the crank speed on a rotary, compared to a similar piston engine (rotary needs 3 turns on the crank to complete the 4 "Otto" strokes, pistons need 2, so don´t think of your 13B as a 4 cyl. 2.6 piston engine running running at the same speed, but rather think of it as a 6 cyl. 3.9 piston engine running at 2/3 the RPM of your 13B), but the pulse, or "impact", as Mazda calls it, is much stronger since the ports are fully open much faster than on a poppet valve piston engine. Thus, slow flow speed, high flow volumes need the least back pressure to flow out easily: that is one of the smart things about using a "Q" trim turbine: less back pressure, which equals higher power at high RPMs. The other smart thing about the "Q" trim is that its blades are straighter, more perpendicular to flow, the same way the '97 up 280hp FDs have straighter blades than the early FDs, this makes the best use of the strong exhaust pulse or "impact" forces, thus the fast spool up. Plus, it already has a divided housing. Now, after saying all this, I must add that I can't find a turbine nor a compressor with these specs on any of my catalogs, not from Garrett, not from Precision, not from Turbonetics, in fact, this is the first time I have ever heard of a "small" Q trim turbine being mentioned by anybody. Either Ron has really dug down and into the depths of the Garrett parts bin or Garrett has really made custom turbines and compressors for Ron. Also Ron, would you care to provide us with the A/R of the compressor housing, also? He fails to mention it, but from the E-Bay photos you can also see that the compressor housing he uses has got an anti-surge mouth, too.

NOW, let us all analyze all these points and provide CONSTRUCTIVE discussion to this thread, which basically is all about confirming or refuting, in one way or another, even without the grace of a dyno sheet (which somehow even up to this point nobody seems to be able to get a hold of), that this turbo really is a great new option available to us all and that Ron at DaVinci really did assamble with Garrett the ultimate turbo for rotary engines. Let the COSTRUCTIVE discussion begin!