i know this stuff is only a rough estimate at absolute best case scenario but kinda fun anyway. even if the power numbers are off if this shows what these turbos are capable of in terms of power curve it would be pretty impressive granted i was screwing around and went off the basis of a 3.8 stroker built block but shows it should be roughly 2000 rpm flat torque curve from 4-6k rpms. i know one of the evos had 700 ft lbs of torque at 5k rpms in the next size down so in 3.8 should be impressive heck even a 3.5. granted i havnt seen these turbos in person so i have know idea if there is room to put them in any of the convential places that current turbo kits use.

http://www.turbodriven.com//performa...6_wrsin=92044&

 

Bump up. I was just looking at these today because I saw them in a magazine. The Mag said that the BOV and wastegate are built into the turbo but I think that was wrong because I haven't seen one with a BOV.

I am a long way from FI(if ever ) but I am interested to see if anybody is running these and how well they work versus other turbos

 

dont think anyone is running them since they wont fit on any kit currently withou major mods. full race lists they are working on a kit for our cars though and they dont have a traditional blow off valve its really a recirculation valve which does the same thing in a different way and every single one has this feature. some dont have wastegates, i was more interested in the titanium exhuast wheels but precision is working on there own so ill just use those when they come out hopefully they arnt too expensive.

 

I have heard they are a bust and all of the twin scrolls have been recalled. The shop I deal with has had some on order since they were announced and still haven't got them Full Race/Borg warner have been pretty quiet about the issues though. I could be wrong but I have heard that from a couple different sources

 

not sure, while they are new to the public i dont think they are actually that new. If you look at the solstice gxp that turbo looks just like a efr even has integrated recirculation valve and wastegate. ive heard they are made by BW too but i cant confirm as i havnt had my hands on one. but like i said im just going to wait for precision to release there titanium wheels and ill have fun with the ball bearing 6765 till then

 

You are correct. They are having some kind of problem with their casting or something and had to get all of them recalled for defects. Full race has had my friend waiting for months for one of these turbos.

 

Any word on when they'll be shipping out the fixed ones?

I'm sure Sasha would custom fab something if someone wanted to run this setup

 

i discussed it with him and he wasnt sure if it would fit they are supposedly quite a bit bigger

 

if they are making good power on an engine half our size then they will be choked like crazy on our engines due to flow so you can't really compare the numbers from a small engine to a larger displacement engine.

same way a 6262 can put down 800hp on an evo but you'll be just barely breaking into the 500's on our engine due to the flow of the larger displacement engine.

which turbo size are you looking at on the chart?

 

when i did it? i was looking at the biggest one they make with the biggest a/r lol i was looking for options other then the 6765 that im getting from sasha with mayby a bit quicker spool. just too much hassel for the efr decided if i want quicker spool after the kits installed ill just buy a 1.32 a/r divided housing and add a quick spool valve.

 

I heard the housings were cracking.

 

interesting, i wonder if just going with cast housing might have been better i also wonder how this will effect there contract to supply all of indy cars with turbos in 2012 i would have thought those teams would already have there turbos

 

I have had a few PM's regarding these turbos, and how they would work with the mid mount kit. One thing that jumped at me was the turbine specs; this being on the largest turbo they (BW) makes (9180 with a 1000hp rating):

Turbine Specifications
■Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
■Turbine Wheel OD: 80mm
■Stainless Steel Investment cast Housing
The EFR 9180 is available in (2) different turbine housing configurations:
■0.83 A/R T3 undivided (Internal WG)
■1.05 A/R T4 twinscroll (external WG)
■Turbine outlet: GT-Vband (aka small 3" vband) ~92mm OD for all EFR turbos


It seems that these are geared towards the 4 cylinder engines, as the turbine options are small and limited. The fitment would also be an issue do to physical size, and space limitations. IMO these are just not worth it with the VQ, possibly a TT set up, but not a good ST option.

 

another reason to go with the precision turbo =P i just hope when they release the titanium turbine wheels its not to expensive to put in. i bet that with all the coating/wrapping im doing and a divided housing with qsv would be some ridiculous spool haha

 

well hopefully you can post some numbers. no one has made any great #s on that kit yet. potential is there, the proper builds are not.

 

That's the thing; I don't think the 6765 has been maxed out on a proper build. The best power so far was made at Dynosty on the heart breaker with a 6765. This was just a simple short block build (stock intake manifold, no spacer, stock DE cams, .81 a/r T4, pump gas) it made 512whp. Not sure what that would translate in to DJ…and to be honest I don’t really care.

There are other things that I have in mind for a ST kit, and the TT kit, but it is hard to keep the R&D going not having even one kit out there maxed out. Many people ask about expansion but again, nobody is maxing out what is already out there.

I think it boils down to the VQ itself, and people not trusting it with anything over 550whp. It is a shame to see, but it is what it is.

 

ill have the proper build it just wont get started until april next year when i get back from deployment, ill have a week work as we clean everything and get it back in order then a month of leave to start working on everything. so far the plans are to do things the right way lol fuel system, intake, exhuast, engine, turbo, engine managemen, a little meth lol. parts alone are going to end up costing me i think it was 22k what i figured.

oh yah sasha i wont be trying to max it right away but my initial buld is aiming for 700 at the rear lol. and ill have several maps. pump, pump and meth, pump/xylene and meth, if things go well with those three ill make a q16 map as well i think the .96 A/R, straight pipe exhuast, headers, tomei cams, and kinetix intake are going to be major. ill prob start a thread about mid march and have the wife email me pics of everything sitting at home at that time and post a detailed thread of what all is going down. ive got quite a bit to buy still.

 

sounds like a win cant wait to see this coming together

 

that ti wheel isn't going to do anything for spool time. i doubt it moves the spool any at all since the turbine wheel is so light to begin with a change from billet aluminum to titanium wouldn't be that great of a difference.

You're biggest spool advantage would be ceramic BB. Then if you wanted more you could get divided housing with quick spool. Before then i would get a 3" SP exhaust cutout and weld it in 6" from the turbine so there is virtually no backpressure on that turbo. This would only maximize it if you then had the best free flowing headers along with ported heads to get the most out of those exhaust gases.

what are you looking for a spool with this? There are always compromises to be made. More power always shifts the curve to the right so if you are wanting 700 hp then forget spooling at 3k rpms. That being said, i can't remember exactly where i was but 16psi was early 4k rpm range and 3500rpms for 10psi on the 6765 with my highly restrictive exhaust. I have a cutout now so we'll see how that goes.

rich, just finished assembling my engine. Should be in this weekend and if i don't run into any more issues i'll have a high number e85 tune within a month.