I currently have a T66 with a .96 a/r. It pulls great on top but doesnt make full boost till 5k. i was thinking of going with a .81 a/r but im concerned with it being too small. are there any safe ways to help spool quicker?
The car: 89 turbo 2
Mods relevant to question: Ported motor(3mm seals, etc), Haltech E6K, 550cc/1600cc injectors,HKS Manifold,wastegate,Greddy FMIC, AVC-R
Currently running 15psi.

 

just outta curiosity, what kind of power are you making along with times run? if u dont mind.

 

There is something else going on that is causing lag.

I have a 1.22 housing on a Q trim blade and I have full boost by 5000rpm.

What size exhaust do you have? Is the cat blocked? How many resonators do you have?

Is the car tuned 100%?

.81 is far far too small for a rotor. YOu should have a 1.0 at minimum.

 

Hmmm... I'm in the same situation .

My set up:
street-ported 13BT(89-91)
Turbonetics T-70 w/P-trim and .81 A/R
HkS manifold(ported)
HKS wastegate (40mm) dumping into 4" downpipe.

Originally the T-70 was mated to a .96 A/R housing but full boost was coming in only at 5krpm.....therefore I decided to swap it with .81 A/R and full boost was in @ 4.5krpm.

I just got the car dynoed this past Sat.
40 runs in total !!!!

Boost was 24-25psi .
Best: 504.8 RWH
some others:
497.5RWH, 371.8RWT
493.2RWH, 373.5RWT
495.3RWH, 366.9RWT

all peak horsepower came in between 7300 and 7500rpm.
peak torque came in about 6200-6300rpm but was flat from 5300 all the way till 7200rpm.

All this came in with mixed results vs my old turbo, a TE-63 from Precision turbo.
My TE-63 P-trim and .96 A/R was ahead throughout the rpm from 40hp in the 5krpm range down to 15+ hp at 6.5krpm then power was equal.
I figured the T-70 would be ahead !!!

I'm slappin the TE-63 back on the motor and going back on the dyno.

Later,
John D
10.80 @ 130mph
88 10th Ann Ed T-II

 

Hey John!
The T-70 is only going to produce more power if your motor can handle the extra air flow! Judging by the results at 24 psi you have something restricting you from making more power.
At minimum you're missing around 20 to 30 rwhp at that boost level! If you make the same power with the TE-63 then you'll know for sure that you have a bottle neck somewhere in your setup!

crispeed
87TII
9.20@150mph
T-72@35psi
2600lbs

 

Hi Chris,
That's what I'm thinking....

Block is 89-91 Turbo II *but* intakes are 87-88 Turbo II simply port-matched to the gasket.
Is there a restriction on the turbo II intakes at certain HP levels that you're aware of ???

The werd thing is that the boost gauge dances mad between 4.5-5.5 'til it stabilizes.....as if there's and intake leak.
I'll take a look at it today before swapping turbos.

Thanks,
And Congrats on those awesome times.

John D

 

I'm presuming here that you don't have a divided manifold/exhaust housing on the T66 setup...

is that a turbonetics turbo?
their Ceramic BB option and the divided housing/manifold setup would decrease spool up time by a good margin... might be worth checking out...

http://www.turbonetics.com just in case you didn't know the site

 

http://www.turboneticsinc.com/

 

.81 is not a size avail for divded housings.. .81 in my opinion is too small.. if youre going to go that small you might as well make the compressor smaller, and put on a bigger back housing

 

anyone know what i would have to do to get a t66 in an fd? what parts and mostly where do i get them since this doesn't aready come in a kit. this was the first single turbo i was interested in befor the t04s offered by xs engineering and i am very interested in the power output of the t66 at 15lbs. i know of a gentleman by the name of fury with a t70 from turbonectics that gets tuned at t and r. would anyone know if his application would be similar to that of the t66?


thanx luigi

 

Set up is the same. For further Details on Fury's setup contact Tony or Romeo at 718 725-0175