Interesting link...

[Chuck Leeper]

BorgWarner MatchBot

 

[John Wilde]

Thanks Chuck!

 

[TurboDave]

Those EFR turbos are, technologically speaking, way ahead of their time. The features are amazing! I'd have one on my car today, but for the fact they use a 4 bolt flange, and the turbine housing outlet uses a v-band clamp. A little too much fabricaction for my budget, especially since I'm no longer racing.

Built in wastegate, and a swing valve that is 70% the size of the turbine exducer!! Talk about rock solid boost control. Wastgate solenoid right on the turbo; Blow off valve built in: Speed sensor option:

Having a Borg Warner turbo design engineer in the family doesn't hurt either!!

 

[bison]

Look at those maps. The islands are tall and farily wide. Id suspect the precision cea wheels are right there with these BW ones. Not much happens below 3:1 pressure ratio though. The 83S75 would be interesting on a small ci lc2 engine with 6500rpm capability and 35psi. Easy to see why we are chasing the hot side with the 3 bolt deisgn with these newer compressor wheels.

 

[ZNix]

Look at those maps. The islands are tall and farily wide. Id suspect the precision cea wheels are right there with these BW ones. Not much happens below 3:1 pressure ratio though. The 83S75 would be interesting on a small ci lc2 engine with 6500rpm capability and 35psi. Easy to see why we are chasing the hot side with the 3 bolt deisgn with these newer compressor wheels.

What kind of power is that turbo supporting? What kind of cam would you need to run 6500 RPM? Just curious.

Thanks
Zack

 

[JT'sV6]

I wish precision had compressor maps. Another good site is Squirrel Performance

 

[bison]

What kind of power is that turbo supporting? What kind of cam would you need to run 6500 RPM? Just curious.

Thanks
Zack

It will support about 800hp. A solid roller with around 230* intake duration.