A dear friend of mine is parting his car out and is giving me first dibs on things. I was going the Borg Warner route (still may) but this has come up and the turbo is near brand new (just dyno session)

gt37r as he says "aka t4/t67".
Dual ball bearing, divided housing.

The turbo has a t4 .81ar on it but i could source a larger housing. How would spool be, HP limits on rotary ect(every engine is different. Yes i know ones limit is far different than one others). Im looking for general ideas and/or very similar turbos that someone is running and there setup/ dyno graph/fuel.

THanks! Price of turbo is $500.00

I searched. Got alot of info about the general/common to4 series, and a few t67's.

His car with this turbo makes a little over 780hp @ 34 psi i believe.

 

Buy it!!!!!!!!! Awesome turbo for tht price

 

Any more opinions?

 

yea, give it to me

 

190 Looks and zero ideal opinions. Im thnking im going to pull the trigger and buy it. ANyone know were to locate a bigger exh. housing?

 

Info is very vague. GT37 is something totally different than old style T4 units. Turbine is slightly bigger than GT35R and compressors range from 76mm(normally found on 30R) to 88mm, which according to map has peak flow about the same as ordinary GT35R 82mm wheel.

As always, measuring wheels can shed some light on what it is. If he calls it T4/T67, it could be pretty ordinary 67mm compressor with P-trim turbine. In that case it could push over 600 HP...

 

Thats the problem. Info is so vague at this point. I bought it so now i will measure the wheels and such. I got the paper work with it when it was bought new and says nothing about it lol. He made 660 and 780 HWHP (Honda wheel horsepower) on it, ran out of fuel. Was going to put 4 more inectors in but... It was also 10.5 compression engine. Turbo was begging for more. Plan was to max it out. Im thinking it should make at least 550 RWHP around the 25psi range.

 

Be interesting to see the performance and spool characteristics. Good luck !

 

Opinions... Opinions??

 

Don't know nothing about that turbo, but I have a barely used 1.0 P trim hotside, in case you are interested.

BTW - Lucky you getting that for $500!!!

 

depending on the dyno and the tuner, you will see between 400-550hp. with those wheels sizes it is a very close match to a true t67 with a ptrim turbine wheel.

 

i agree w rxspeed7...

you have the ubiquitous (well, it is) PT67, GT500, TO4z... i may have missed a few.

there is a Garrett comp map for the wheel.

73 pounds at 29.4 psi.... 730 piston 560 rotary rw
68 pounds at 20 psi 520 rotary
60 at 15 460 if you can push it that hard at around one bar/probably not...

the hotside is probably a P trim which works fine. do find yourself a larger hotside housing.

looks like a good deal if it is in excellent condition.

howard

 

My car with a true t67 made 400rwhp on a mustang dyno at 22psi. I do have the e-cover comp housing though so there went a few hp. But on a dynajet the car made 525hp. Thats why I always ask what dyno cars are using in reguards to hp figures. They are like comparing apples to oranges. Some tuners tune in 3rd and some tune in 4th. All these things have a big part in dyno numbers.

Another thing to keep in mind is a dyno is a tool, not a bragging right. They are designed to properly load(not dynajets) the drivetrain to simulate real world driving so that a vehicle can be tested and tuned properly and\or diagnosed for problems.

 

The car this was on, made 420hp on pump (dynapack) and 412hp (mustang dyno) made consistent 10.70-90 passes @130mph, stock trans ect.. I may trade the turbo for a BW s366 straight up. Idk, yet. Im wondering how spool would be with a 1.0 or a little smaller (what im looking for). I was in the market for BW but i hate how Hard they hit and a bit laggy for my taste. The dyno is a bragging right to the person thats getting there car tuned if there not the tuner. I hate when people babble on about there dyno queens. Logans (defined autoworks) will be tunning my car, and it will be on the same dyno this turbo has always been tuned on, if i keep it that is.

 

If the price is right, possibly. It's divided correct?

 

If i run this turbo it will for sure be maxed out without a doubt, begging for mercy.

 

Trade you for a s360? Those numbers seem very true to actual whp. Dynapacks are usually very close to mustangs. It's dynajets that give you high numbers. I like to think of dynajets really as a flywheel hp reading.

 

Correct, its divided. Had it on my 13B for a whooping 500 miles or so, and then the RA seals scourged my rotor housings. Replaced the engine with a non ported one, so I went with a .84 hot side.

 

Have you drove your car with the .84? If so hows spool to redline? How much power did you make @ what psi? dyno graph?

 

IMO, spool is not much more faster with the .84, I want to say that it spools about 500rpms faster. I am running a TO4 60-1, and with the .84, spool is almost instantaneous when going from vac to boost in 4th gear and boost holds all the way to redline.

I had the car tuned to wastegate spring, since the shop was taking too long to finish the car. they got 28X RWHP at 9 psi on wastegate spring, on a rich tune (imo)

I don't have a soft copy of the dyno graph, I will look it up and scan it, should have it by Friday.

 

Most people think that tailoring turbine housing A/R ratio is just adjusting turbine flow, but in reality, it changes turbine efficiency curves for any given wheel speed and expansion ratio. Generally, smaller A/R values are more efficient at high expansion ratios and larger volutes are better at low.

Simply said,intention of running high boost doesn´t mean that you have to use large housing. It can be quite opposite. I recall many Crispeed's posts where he states that he found no additional power by running larger than 1.0 hotsides on turbos of similar dimensions as yours, on bridgeported engine so go figure

Or even simplier, turbine housing A/R ratio is rather function of engine displacement and rev range than boost pressure.

 

I dont believe the big housing hype, to an extent. There is actually a few people on here running this same exact housing make very decent power for spirted street driving (low 500's), the boost isnt way up and it carrys a decent powerband to redline. Although the turbos are gt35ish. Im going to give it a try. If things get to be to hot and the boost needs to be cranked hard to make decent numbers then ill do something else.

 

All figured out. Turbo: GT3567HO Its FS