I'll post the dynos on my T-66 setup as soon as I get them. I pick the car up Friday. The picture below is a T-66, but it's David Marvel's (Marvelspeed). He used it as a template for my manifold while waiting for mine to come in from Turbonetics. I got the dual ceramic ballbearing with water injection...all polished (they all come polished now) with ceramic coating on the exhaust side.

I'm running the Haltech E6K, custom fuel rail with 1600cc secondaries, Aggressive steet port (Don Marvel's secret recipe) and a Supra fuel pump. Don speculates easy 600 RWHP at around 20psi. Not that I plan on running that much boost. We'll see what the dyno says.

No idea what spool-up will be, but given the dual ceramic bbs. I'd venture to say pretty quick. Once again, we'll see.

In the mean time, here's a shot of the engine =from a couple weeks ago.

https://www.rx7club.com/forum/attach...postid=1822589

What are the specs on both of the T66s? Q trim? AR? Divided? Thank you for your time, Carl Byck

Now, having seen Yogis dyno, it is almost identical to other T66Qtrim 1.00 dynos I have seen, Three in all, all 500rwhp. Very nice, I will be trying this next. For now my "indestructible" 97 Supra TT is having some problems, hopefully it's the turbos, and I'll "have to" go single........Carl

My T-66 is P-Trim with .96 AR. It's open, not divided.

Three of us went out to play
 

...a few nights ago. Freddie runs parallel w/ E6K (313 RWHP), Art is a T-04S and remapped ECU, and I w/ T66 P-trim w/ PFC (402 RWHP). Freddie destroyed Art and I off the line and jumps out fast to a bit of a lead. The T66 is explosive up high. I don't think the T66 is the way to go for anything but the track.

Three of us went out to play
 

...a few nights ago. Freddie runs parallel w/ E6K (313 RWHP), Art is a T-04S and remapped ECU, and I w/ T66 P-trim w/ PFC (402 RWHP). Freddie destroyed Art and I off the line and jumps out fast to a bit of a lead. The T66 is explosive up high. I don't think the T66 is the way to good for anything but the track.

mark57, What size ar? Is your motor ported? What manifold? Divided mani, and turbo? Upgraded ignition? I assume the TO4S was something like a .70 cold side, with a 1.15 hot? Has Art dynoed his? Thanks, Carl Byck

I'l be dynoing a .70 divided T-66 on a stock port next week just for shits and giggles

I got the turbo, manifold, Racegate from South Florida Performance. I never received a compressor map w/ it and I don't know the a/r.....I know I suck at the moment, but I've tried to get the information and they aren't being too cooperative ....
Manifold / hot-side housing not divided, stock port, JE RotaryPac firing a pair of Crane LX90 coils, NGK 10.5 plugs.

I'm supposed to pick up the car tomorrow! I still have to break her in for another 700 miles...So it will be a few weeks 'til I really feel the power. It looks so freaking good though. I'll post pics Monday night (assuming my mechanic gets done with it so I can take it home and wash it)

Well, I am buying a turbonetics .81 Q trim T66, can't pass on a great deal deal, Probably end up switching to a 1.00ar divided, but we will see. Car is still getting the widebody conversion, between the 335s out back, and the T66 I should be able to break my axles in a hurry:)

T66 .81 Q trim dyno, this is going on my Supra first, then when I finish the body on the & look out :)http://www.supraforums.com/attachmen...postid=1084857

i have the garrett T66 on my car with a 1.32 p trim rear and it makes positive manafold pressure at 2000rpm in 5th gear, ready to boost away hard at about 3000,

i have a lot of wastegate creep that is making it boost slow as well, once i get the electronic controller on there it will be much better

Piano,
You cannot use the T#'s or compressor wheel description to determine if one lags more than the other. If you are concerned about lag, then you need to pay attention to the turbine area to radius ratio. The smaller the number, the less lag you should see.

A T66 turbo is a very nice one. You could pay an extra $300 or so to get a bigger turbine housing that's divided. It'll provide more top end power, but at the cost of lag. I don't see lag being an issue on any single unless it's a huge turbine housing/turbo.

As Carl mentioned in a previous postt, check the other components of the car. The turbo is nice, but the EMS and fuel set-up are more important because you can easily blow up the new motor if it's not tuned right. That's probably why there is a new motor in the car right now.

Carl,
Where have you seen a GT35/40 with a divided T4 flange? I'd be interested in a turbine housing as such since I had to customize my exhaust manifold for the typical T3 turbine that comes on the Garrett GT30's turbine housings.

T66 with 0.70 turbine housing sounds like the beginning of a great auto-x configuration.

J

umm isnt the greddy t78 a hybrid mitsubishi turbo with a tdo7 compressor and a tdo8 turbine?

The 35/40 with a T4 is a custom setup that I have been talking with Carl about getting. It'll be ~$300 to get a custom machined T4 housing to mate with a 35/40 CHRA. The options were 1.0, 1.15 and 1.32 divided.

-Chris

I thought I'd let you field that one chris. As you now know, I have gone 666 on you:) For 800.00 I could not pass it up w/4000 miles, polished etc. I just sent the car into the body shop to finish up the widebody. Talk to you soon, Carl

Yeah, I saw that ;) That's totally cool. Seems like an awesome turbo, just maybe not what I want for a vehicle which is, realistically, street only. Funny thing is, all the searching and hunting and pecking, and we may both end up with "regular run of the mill" turbonetics turbos. HA ha!

Glad to see you made a decision. I'd be curious to see the dyno graphs that you have along with the pertinent specs of those T66's, who knows. Maybe that compressor with a smaller divided housing and I'll get the spool I want!

-Chris

I think that the .81 q trim will spool like crazy, I just don't know if I'll want to take it off the Supra, something about the ability to generate 750rwhp, and 650ftlbs of torque at 4500rpm may prove addictive, OH WELL, I'll just have to try :) http://www.supraforums.com/attachme...&postid=1084857