Oh, and just for clarification: The GTM tune was uploaded into the ECU by Jared at UPREV. We just can't get it to read OR start.

Coop

Interesting for sure man..... GL . must be hard to not get too involved

all good things happen on Fridays?, Tuesdays?, in March... Good luck

^^^ He he he!

Well, a bit of good news: The car is now together and running. No test rides yet, it's that early. They just got it finalized later today.

We had issues with (1) intermittant connector, one misconnected connector, and an initialization/immobilizer return for the ECU to UPREV. It's all too confusing to relate, but that's behind us. WHEW! (Many helpful calls with Sam @ GTM, and Rich or Jared @ UPREV who both helped the progress.)

I am hoping Jimmy will put a few miles on it tomorrow, and then he wants me to take it, drive it easily for a few days, and then come back and go over anything needed.

Yes, all good things come to those who wait. I'll report back in a day or so after we know more.

Coop

That kickazz news, i know i'll all be worth it in the end.

Jimmy had driven the car today and was pleased at the performance and shifting, although he didn't press it hard. As we BOTH found out there is little 'press' needed on the pedal to wake it up. :driving:

I arrived at 5pm to find his detailer Mark finishing up a full clean & wax. REALLY sharp, and an extra perk I wasn't expecting.

We settled up to both of our satisfaction, and I took him for a short ride. Well, you've all heard the reports from others, and it was as impressive as I was imagining. I also kept it below 1/2 throttle, but that boost starts building and it has a mind of it's own. Me likes. :tup:

I was VERY anticipatory of how the 5AT transmission would react with the TransGo kit, and any programming that was done via ECU. Before, the OEM box was sluggish and slow. Nice and comfortable, but not crisp. NOW it's crisp. As Sam informed me early on, D would be comfortable, but DS and manual shifts would pop firm. Perfect! This was really gratifying. Highly recommended.

Wouldn't you know it, but my wife caught the flu today and was home needing to go to bed early. I had to abandon my initial plan of a nice long highway ride and simply take it home after a 15 min jaunt. My 8-yr-old needeed a babysitter. :)

I'll put some time in on it this weekend, weather dry.

One disappointment: There is a VERY pronounced drone at 2100-2500 RPM in the cab. Loud. Below and above it's fine, but that's a very popular range for everyday driving. This is a full GTM 2.5" exhaust with CAT test pipes. I'll discuss this with Sam.

Beyond this there is still some minor tweeking needed: The idle is anywhere from 700-1000rpm and it's not gotten any logs sent to GTM for diagnosis. (Am I correct on this?) We'll do that soon.

The Shop's dyno is available, but we want to make sure it's right on the road first, before stressing it on the dyno. Especially with the auto, we wanted to be cautious. Fine with me, and we WILL put it on soon enough.

Overall satisfaction is HIGH. More news as it develops. Thanks for paying attention to this delayed build. :)

Coop

Happy to hear everything is working well now. So even with modest driving there is still a bit of boost? In other words, there's a noticeable difference? :)

Waiting on his answer to. I'm 99% sure this is the way I'm going and that would seal the deal.

Hi guys,

Short answer: Yes.

Truth is, my title claims this is Stage I. Sam was confident enough in this that he sent Stage II turbos, so it's actually a Stage II setup. Like you, I was wary of a boost out of range of my everyday driving. Well, it's almost immediate, and there doesn't appear to be any loss pre-boost.

I'm having my cake and eating it; slice-after-slice. :)

Here's a VERY short and non-authoritive clip.

First is a 1/4 throttle run up the gears in DS from first, and then I slow down and do it again at 1/2 throttle. I think I cautiously rolled back a bit because it hangs in second a bit long, but you get the idea. The second one chirps it a bit in second. You can see the traction light flickers on. Cold roads, and unsafe, as you can see.

YouTube - Infiniti G37S - GTM Twin turbo - 5 speed auto w/kit

What's impressive is not only the immediate power, but the firm shifts.

Coop

Nice video...that car really pulls. :tup:

congrats on the build. your making me think again of a TT build but with a 7SPEED AUTO for DD ,by the way does anyone know if the valvebody upgrade is out for the 7speed yet? thanks
Moe

Maybe give GTM a call and/or pm Sam over there.:tiphat:

I've got the 7AT and heading down the SC route, and hopeing that it's not to costly to upgrade the tranny.

It's been at The Shop for it's final go over. We've put it on the dyno and are de-tuning it a bit. That's right. It came in at 530whp at around 9lbs of boost. YIKES!

Jimmy asked Sam to modify the maps for even lower AFR's (11.0 range). This could remove about 30 hp. Still quite aggressive for an auto.

I promise another, better, vid once I do. I can't wait.

This has been a longer than usual process, but it's a success story all the way.

Coop

Damn, even after the retune 500whp is perfect for the street.

well i did ask sam on a privte msg and waiting for his response , but i really wouldnt go that route without having the ability to upgrade the valvebody upgrade , dont u agree with me ?:ugh2:

i think he should leave it as not too rich and not too lean , just put on drag radials 305 in the back and he is set to go . but in the end of the day thats just me .

From what I know, there is a software tuning parameter that the 7-spd auto can utilize (and the 5-spd?). Jimmy's GTR has the 7-spd and they bumped up the pressure without disassembly. It's making 760whp!

Coop

I thought the trannys in the GT-R were different than the Z 7AT ??

760whp ??????? wooow , but then again the trannys for the 370z and gtr are different right ? so its almost impossiable to push the stock 7speed tranny for the 370z for that amount of power for DD ? anyone , the point of me asking cuz am thinking of building a
speed 7 auto but i the same am afraid their isnt a valvebody upgrade for it plus it will have problems down the road for a DD unless someone corrects me wrong from a personal expereince !! thanks for your help .

MOE

^^^ I don't know, myself. Someone else will have to clarify.

Sam sent Jimmy (2) tunes today. Each one a bit richer. One of them is going to be my final. News once we do.

Coop

Cool, in for final street friendly tune and dyno number.

canit wait to see the numbers

Finalized project!
 

We finished up the tests on the car.

Jimmy had done some tests last week and conferred with Sam @ GTM to richen up the fuel in the upper ranges. He wanted it solid in the 11.0-12.0 AFR range.

Jimmy's experience is primarily with Subarus, Supras, and Evo's, and these are the numbers he feels confident (with Pump 93 octane) we would need. The VVEL 3.7 engine is an engineering marvel, and Sam has assured him we are on the money here.

After Sam's retune the car was fatter (richer), and unlike what we thought, the car drank it up. At 9lbs boost the car made 527whp (Dyno Dynamics dyno at 1.2 correction factor. My Subaru STI made 496whp on this, and went 10.85 et.)

Jimmy asked me if this was fine: I said "Of course it is. Just because, can you tweek it up to 10 or 11lbs and let's take another look?" OK. As you wish...

Here is the chart:
http://www.fototime.com/49187AAA4545975/orig.jpg

I came there with my Canon S90 and took a few short vids of the dyno passes. After picking it up and a few road miles, I then took an early evening ride with the camera mounted on the passenger headrest. I lazed it through second and then stepped into it.

Here's the whole sequence in one video for us:

YouTube - Infiniti G37S Dyno @ 537whp & Test ride - TheShopCT / GTM Twin Turbo

Finally the Northeast weather has gotten clear, and I'm looking forward to many road miles now.

Props back to The Shop (Jimmy, Hector, Kenny, Johnny, and Paul) and the team at GTM, especially Sam who guided us through some tricky moments, and lastly to the guys at UPREV in Texas, who also helped us immensely.

Coop

Damn that's some good useable power. It's still a stage one ?? Or did y'all go with the stage 2 later on in the bulid process ???

Same vid, i just embedded it.

Thanks, man. That's Stage II. Sam took command of that..... ;)

Coop

Me=Jealous

Great news that 5at can handle this much power, now time to hit the tracks please :)

:iagree: .... just get some sticky tires .... :tiphat:

I am not on this site very often but i would like to see the torque #'s.I really hope you have upgraded the trans v/b and trans cooler as if you have not the trans will not last long.

^^^ ??? The torque curves are on the dyno sheet above. Thanks for the schooling on the trans. :icon14: Or did you miss that part of my build...?

Coop

Awesome car!

Ya really, this thread is only two pages long read before you comment.

^lol. This thing is truly an automatic beast. It makes me rethink my supercharger plans.

doesnt a CF of 1.2 put it @ 447rwhp?

:ugh2:
:bowrofl:

Although LM is now banned, it's a valid question. Every shop has the option to work with whatever dyno numbers and CF factors they wish. In the case of The Shop, Jimmy has used this correction factor for years. It coincides with what numbers stock Subaru STI's and WRX's were getting on other dynos.

My Subaru made 496whp on this dyno and ran 10.85 @ 128 with a good driver (No slicks, meth, open exhaust, seats removed, or nuthin' different!)

This seems to be the ten-second break point on his dyno. In this case, I would LOVE to see a mid-high eleven second pass with this car, even though it has even more torque and whp. There is no way it will launch hard to go tens. Nor do I care.

All I can tell you is it's VERY worthy power.

I need to lose the exhaust, even if it loses 25whp. My wife won't ride in the car. She hates the drone @ 2100 and it's no fun dragging someone out for a spin who doesn't want to be there. :argue:

Suggestions on a performance quiet 2.5"-3" exhaust?

Coop

Did you have the exhaust or listened to it before getting the turbos installed? I have the Fast Intentions TDX with 12" resonators, and it drones in the same region as well. It was bad when I had the Berk HFCs, so I went back to stock. Now it's much bearable, so perhaps you can look into getting the TDX with 18" resonators (what I wanted from the start). I'm only suggesting TDX because it's what I have and tried, so there's not much to compare. What I can tell you is that my gf hated my car and says it sounds like a boat. She's much more tolerable of my car now with the stock cats.

Thanks for the suggestions. I have the GTM 'test pipes', and they are a good reason why it flows so well, makes great hp--and is so noisy. The entire exhaust is a series of flow through pipes with no chambers.

Jimmy can weld in a couple of extra resonators, which he did on his GTR for the same reason. I don't want to butcher the system.

Coop

I dont understand, Sam wont send me a new tune like he did for you. Im running at 10.25 (way rich) and my friends nismo can actually keep up with me! im at -20vac and 7.5psi that should not be possible. Dont get me wrong i pulled but it was very weak pull. lol , he is stock.