GTM STG 2 SC, when will it be available?
 

what's the main difference between Stg 1 and 2?

when will it be ready?

will it require more supporting mods than Stg 1?

thanks,
James

No date has been set since GTM is waiting on Rotrex to be finished with the new charger. Then of course GTM's design team can determine what is needed (if anything) to fit he new charger with the stage one components.

It is all a different supercharger together, Stage 1 uses the Rotrex C38-81 with a our own GTM compressor housing and the stage 2 will uses the new C38-91 supercharger from Rotrex.

The units are on the way to us and we do have several cars in the shop waiting for it , Once we get it we will be able to determine how much work will it take to adapt the bigger charger to rest of the components .

Realistically first quarter of the year .

Sam

Thanks Sam! This will probably be my first and last mod.

So "we" say. :icon17:

I would love to have a gtm s/c kit.

Awesome! Estimate of #'s...? Or is that top secret/undetermined yet!

Hey Sam

Will you have the VVEL cracked by time the C38-91 SC arrive? or its not anytime soon?

Im pretty sure they already have it cracked considering they are doing a 1000hp 370 while still using the vvel system. But sam is a secret guy

^ Yup, that's probably true... It be great if he has cracked it to avoid heating issues!

Good new .
AS long as the first one come to "Z" in Canada. Its been a long wait, but its worth it.

I agree it has been a long wait ....... <as I push Z-E to the back of the Cdn line up> and I should be the first one in Canada with the Stage II GTM SC :p



SAM! ...... Z just gave me a insulting gesture with his finger. I think he should be sent to the time out corner and made to wait longer for his toys ..... lol

Hopefully even sooner then that with a little luck.

Sam

GTM Stage 2 SC
GTM Traction control
GTM VVEL Controler

Sound like a deadly combo, Might be worth the trip to Canada after all ;).

Sam

Sam, like traction control system is actually from Racelogic, which company does the VVEL Controller?
Or is this a true in-house product?

tease :excited:

We never made it a secret that uses the Racelogic system in our traction control product offering, Same goes with our supercharger kit that they are HKS and ROTREX based head units.

Do you relay think that all the parts that are on your 370Z are made by Nissan !!!

As for VVEL controller i did not know of any company that offers such product, Do you ?

Sam

That made me lol.

Will the VVEL controller help with the use of Long Tube Headers?

I wasn't attacking you on anything, I was just interested in who made the controller and I simply used Racelogic as an example.

I'm fully aware of where the products that are on Nissan's come from as I work at an OEM automotive supplier... So it's my job to know...

So no, I don't know of a company that offers such a VVEL product, that's why I asked you.

Really no need to get so defensive....

Absolutely,Triming back the high lift will create more boost and power .

Sam

LOL ..... another thing to add to my purchase list :tup: ....... now I'm feeling more like Z Eliminator ... broke but happy

It's going to be a interesting spring project

Not being defensive, Was trying to understand what you actually meant . it is all good .

Back to the VVEL topic

With Vehicles that is running the HKS VPRO as an ems, the VPRO can do that. but we can't really expect everyone to run a VPRO on their car. We are working on an external controller that allows the end user to buy separately and control not only the VVEL but also the cam phasing as well.

We will have more info as we get closer, we are currently on the right track.

Sam

Very exciting stuff for sure :tup:

Sam

Intake and Exhuast advance/retard with overlap WILL work wonders in all areas and applications of boost, should be sweet.

Easy to loose power to if you are not right on top of the development, these systems take a lot of mastery thats for sure.

Looking forward to progression and data.

So excited, my Z is in winter storage considering how crappy NY winter has been thus far. Keep at it Sam we can't wait!

I hope the VVEL controller provides the results everyone's expecting!

Sam, are you speculating or do you have some results/indication that there's a lot to be gained from VVEL control?

Would you ask this question if it were made by Stillen? Lol.

Come on this **** is getting old. It was a simple question wasn't to be disrespectful.

Proof is in the way the VVEL system works in stock form. The cam duration is so aggressive at 300 that it causes valve overlap which in turn reduces boost and reduces power. Drop the cam duration and you'll be able to use more of the air that's entering the engine for combustion purposes which will create a huge increase in power.

Example, if a car is making 465whp on 93-octane at a 10.5:1 compression ratio (350z w/ HR motor) on the same pulley/charger that Sam offers in his stage 1 supercharger kit which only makes 8psi on our cars because of valve overlap, if we were to drop the duration to match that of the HR motor and with our 11:1 compression we would make more power then 465whp, and that's only on the stage 1 kit with the 14psi pulley (maxing out the C38-81 supercharger). The stage 2 kit would make ridiculous amount of power with the VVEL controller.

Just my 2 cents.

I can't wait to see these results! If there is that much power to be made by adjusting VVEL that would be great!

Thanks Toner, seriously its beyond getting old. Specially when people whom I have never exchanged words with are jumping on the bandwagon.

Thanks Staple for the explanation, but I know the theory behind it. I'm just wondering if there's any proof that it works well on this car so I can start planning for it!

The question is purely for informative purposes, I already said I have nothing against Sam or GTM. If anything it's just one more opportunity for Sam to garner interest in the product.

Sorry but everytime I read one of his comments it nothing but negativity, so that's how I read it.

Yeah, why don't you go back to 2008 and read my entire history of posts since then before you make a judgment? If actually look up my name and look up posts you will see that 95% of my posts are positive and constructive and have Nothing to do with either Stillen or GTM.

We really don't need to clutter this thread with this stuff. Just end it here so we can find out more about VVEL tuning please.

^ +1

I'm pretty curious about it and expected gains. Not being pushy either, just wondering if there's any sign of what we can look forward to.

lol Flyboy has 44 posts and calls out RCZ, dumb move rook. I can't wait to see how vvel tuning works with F.I. on the Z. If the results come anywhere close to some of the educated guesses I've read on here, vvel tuning with f.i. will take the Z to astonishing high performance figures. I knew my Z was a good buy, especially with a mad scientist like Sam backing the platform.

^ Hope so. It would be amazing if we could put out another 30-50hp or so, but I think I'm just dreaming...right?

lol why you all care about HP?? RCZ you already had 450 HP and 3xx Torque.. if i were you i would say "ill be happy to see another 50 "torque""

back on topic,

Sam, how can we control the VVEL? i know its a noob question but im noob when it comes to technology.

do i have to take it to tuner? (please dont say yes bcuz i live overseas)
or just plug in and drive?

Looking forward to results