GTM Performance Engineering: Stage 2 Twin Turbo V2 w/GTX Turbos - CARB app submitted
 

With all that we have learned about the CARB approval process in our experience with our Supercharger Kit, and the fact that our Twin Turbo kit for the VQ35HR got TUV approval in Germany (their CARB equivalent), we believe we have an excellent chance of getting our Twin Turbo Kit 50 State Legal.

The CARB legal version of our Twin Turbo kit will share many of the characteristics of our original kits as well as a new element: Garrett GTX2863R Turbos. These new turbos are an excellent all around performer and will be offered with the .86 A/R exhaust housing only. The GTX series spools up quicker than the older turbos and has better boost response in addition to having a broader operating envelope thanks to the advanced aero that the 5-axis milled compressors afford. This gives the end user an excellent turbo that is well matched to the breathing characteristics of the VQ37. This will or course be our Turn-Key kit and will come with fuel system and engine management upgrades.

This is very exciting news and we know that we are being very ambitious and honestly there is no guarantee whether or not we'll be able to achieve this enormous goal. We do think we have a very good shot at it. If you don't try, you never know.

Sam

Uh oh...CARB legel TT kit. :tup:

Good luck, I truley hope this happens. The more CARB legal power options we have the better. I have to deal with a variety of CARB regulations with my work and those guys don't take logic into account for anything.

Oh wow! Sub'd!

Yes!!!!!!!!!!!

:tup: Freaking AWESOME!!! Good Luck SAM we are definitely looking forward to this!

Watching for development!

So true, even the head of the CARB board admitted that certain barred modifications lead to greater efficiency and decreased emissions. Plus, they give preferential treatment in the approval process to certain aftermarket companies.

The best of luck Sam, does this mean the stock cats will be retained?

Wow ... that would change everything...

:icon18:

sub'd.. would existing kits be able to "convert" to a carb legal setup? Will the GTX turbines fit the existing kit, ie: can I keep my exh. housing and bolt on a GTX2863R to it?

Any update on the SC app? I think that was submitted more than a year ago.

Yes, you can convert it. The GTX is sold without a turbine housing and any GT28 turbine housing will bolt up to the GTX CHRA. So, yes, you can keep your coated turbine housings.

PM en route.

Lol...yes, we're extremely close.

I knew they were sold without the housing thanks for confirming they will fit the existing kit... This is good I'll reply to your pm. :tup:

Have you guys test fitted one yet? I would confirm fitment before selling them as replacements. I am running GTX2863 on our HR motor with your manifolds and I had to modify the left side motor mount bracket pretty decently to get the front compressor housing to clear. I am however using T25 Plus vband exhaust housings, not the internally gated 5 bolts so it might change the location slightly.

what about EFR turbos??

EFR's are much bigger externally speaking so it would require custom exhaust manifolds.

Yeah confirmation that it will clear the mounts and that existing pipes will bolt on to them would be nice..

http://www.the370z.com/forced-induct...elease-56.html
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Awesome. Man, if both kits got CARB approval, I would have no idea what to do. So much more power with the twins, but I really enjoyed the drivability of the SC...

twins are always better ;)

Wait, I was just thinking, where are the cats going to be on this setup? Post-turbo and aftermarket? Is CARB known for approving kits with aftermarket cats?

How many (previous) GTM kits have received CARB, approval?

Do you guys have specific's on what else has changed from your existing TT kit to the CARB legal kit that is in development other than the turbo being used?

For those of us who have your first TT kit, would swapping just the turbo make our kits CARB legal now? Basically, what else is needed to make the non CARB legal kits CARB legal? Very interested in this.

Somehow they are going to have to work cats back in. The tough part--I suspect--will be getting an approved cat with the kit that will last.

Exciting news. I'll check back in 2013.

Hmmm...well, we fit a pair of GT35R's without modifying the engine mounts on either the HR or VHR and the 35R is a much bigger turbo altogether. Granted we have our own custom turbine housing, but the 35r's compressor housing is way bigger than the GT28's. What part of the compressor housing was interfering on your project? Did you clock the turbo before trying to fit it?

After going back and forth with a Garrett engineer, he assured me that the external dimensions of the GTX2863R compressor housing isn't any different than the regular GT2860RS. Given that information, it would be pretty safe to say that it would fit, which is why I am asking about the clocking of the turbo on your project.

Our Turn-Key turbo kit uses an adapter to go between the turbine outlet and the stock cat as it always has. Nothing needs to change there.

There's a couple other minor changes that will probably need to be made. We'll make the necessary changes as we go along. I'll have to look into the possibility of a "CARB conversion kit". Just bear in mind that we're at their mercy to some degree.

Sorry if I'm bringing this back from the dead. Anyone hear anything on this?

We have not received the test letter for the application yet. Once we do will proceed to the next step. The delay in getting the test letter worked out to our advantage sense we have learned so much in the last six month dealing with our supercharger kit approval process . The supercharger kit car is going in for testing next week, if every thing goes according to plan we'll move our focus to our TT application .

Sam

Great news for the California customers. Even if this gets drawn out, no one is closer in turbo land.

Nice to here, would also like to see updates on how next week turns out for the supercharger. Thanks!

Excellent news! Thanks for the update and best of luck! :tup:

I know this probably isn't right place to test this but how'd the supercharger testing go this week?

Nothing?

We're still waiting on the results from testing. Once we have more info, we'll post it up right away.

Thanks! Glad to hear it.

In for updates

same here

It has been a month - do you have news on this?