I meant T3.My bad.Yes it will cost more for GT35R but it might be a good choice for those that want to run very high boost pressure efficiently.




Tim

 

Garrett is wrong.I know for a fact that we have 650 at the wheels with that turbo.

 

With a T66 at 15 PSI you will see 550 RWHP. The GT35R require the exact same boost pressure based on its flow chart...

 

Garretts wrong about their own turbo? OK fair enough, it still flows less then a T66.

 

Um just checked and max efficiency on a GT35R is 78%. Max efficiency on a T66 is 76%. Oh and at 55 lb/min of air the max efficiency of the GT35R no matter what boost pressure is 76%. So how exactly is this more efficient. Both units are in the 76% band. Assuming they weren't the largest gap in efficiency at that boost pressure and mass air flow is 2%. Guess what that nets you, ZERO.

 

The T66 and for that matter the GT35R are MORE efficient that high yes... The T66 is still in the 72% efficiency band at 6 PSI. I just wouldn't run it that low...

 

Im glad for this thread.. (learning).. from what i've been told, if i want high horse power numbers, then i need to go twin turbo cause single doesnt push enough air, etc..... But are you guys saying that i can still get in the high HP range on a single turbo kit (600hp) (providing a engine build of course...)?

 

In qiute a few instances, yes. They underate some of their turbos. I think Turbonetics does too:^) I have heard of some cars with a T66 and alot of boost making close to 800 at the wheels.I havent seen it firsthand though.


Tim

 

With the right single turbo, 600 WHP is a no brainer.Many people use a single over twins to produce insane amounts of power on Supras,Mustangs,Buicks,etc...........

 

You can easly make 600+ with the t66 turbo with the TN kit, myself am planning for 650whp at 18psi on my custom stage two kit. Bryan @ turbonetics supplied the Turbo ( sent him my t-60 and they machined it out and put the t66 wheel in) and My sponser along with myself put togeither the other parts but no fuel return.

650whp With 116 octane race map
550whp 94 octane street map

Here is my current setup


Utec EMS
T66 turbo
RC 750cc Injectors
Tial 44mm high pressure wg
Orignal FMIC which can support over 650whp
orignal TN piping and hardware / Custom WG relocation
Wiesco Pistons 8:8.1 pistons
Crower Rods
ARP head/ main stud kit
Cometic head gasket
Exedy Stage 2 clutch
Greddy evo 2 exhaust
Crawford Headers
Crawford plenum
UR pulleys

 

well I have only a built bottom end. No cams or anything else. I am going to do the T66 modification to my 60-1 after making this thread.

My Mods:
-a 8.8 to 1 compression short block:
-Wiseco Pistons .020 over
-Eagle Rods
-ARP Rod Bolts
-Block oil passages cleaned
-Block redecked
-Block Bored and Honed using a Torque Plate
-Crank balanced
-Crank journals polished
-New Rod and Main bearings
-UTEC
-aam Fuel return system
-rc 550cc injectors
-jic full titanium catback

If I do the t66 mod to my 60-1, what hp do you guys think my car will be able to reach???

 

700 HP is easily within reach at roughly 25 PSI of boost on the T66.

 

So you were able to use the T66 with the current TN kit piping?
I am really interested in hearing more.

 

So I want to make sure that I have this right.

I can send in my current turbo from the stage one kit and for about $450 they can do the upgrade to the T66 in about a week. Also, all the current piping and wastegate will work?

 

How is the spool, and powerband characteristics with the T66?

 

This info makes the Turbonetics kit look much more attractive than i previously thought........ Good info guys...keep it coming...

 

How do you guys deal with the heat issue of the turbo being in the engine bay? Is it as big a issue as others make it out to be?

 

Just wrap the hot pipes. It makes a huge difference. I had mine coated and wrapped over the winter and it is night and day to what it was like before. Its a non-issue.

 

The turbine section remains the same. You will need a larger wastegate to make bigger numbers as the Evolution is flow limited at about 500 WHP. You'll need a Newgen or twin Evolutions to make it work but aside from that the piping doesn't need to change..

 

Yes all of the current piping from the stage 1 kit remains, only changes are turbo and wastegate everything else works perfectly fine.