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-   -   GTM Performance Engineering: VQ37VHR Twin Supercharger System-First Look (http://www.the370z.com/forced-induction/60346-gtm-performance-engineering-vq37vhr-twin-supercharger-system-first-look.html)

SS_Firehawk 12-03-2012 01:18 PM

Talked with them, and we agreed to keep it between us. Because it isn't something they can do for everyone and this was circumstantial. So I'll respect their wishes on the matter. I also edited the previous post to further keep that confidential. Bullitt, can you edit the first couple sentences from your quote please :)

Also, my car is being transported later today. I'm asking My Wife to take some pics and a video of her going away. I did want to get pics of all the parts I just bought too, but the brake kit is supposed to arrive today and be on that truck. I also asked if they can send me the baseline dyno they take when they get my car so I can get a best case scenario of it's current state. I'm hoping they can get a snap shot of all the stuff they are throwing on as well. My journal is filled with too much text and not enough pics!

bullitt5897 12-03-2012 01:42 PM

;) taken care of

SS_Firehawk 12-03-2012 03:11 PM

Transport delayed till tomorrow morning.

Mike@GTM 12-03-2012 03:29 PM

We got a call from the transport company and the car will be arriving tomorrow. We'll get a baseline done on our Dynojet and another baseline on our new AWD Mustang dyno that is coming in within the next couple weeks.

SS_Firehawk 12-04-2012 02:20 PM

And She's Off!

http://www.youtube.com/watch?v=kve75ci5jfE&feature=plcp

Mike@GTM 12-04-2012 07:30 PM

She's here!

SS_Firehawk 12-05-2012 12:19 AM

Woot! Can't wait till the shakedown starts! Can't wait till I get home! My new motivation to get home! I may need to start off in another car... Speed limit is 24kph here... if your lucky enough to be driving.

LukasC 12-05-2012 11:20 PM

wait a second!! i thought they scratched this kit?!!?? looks like it still alive!! good god i can't wait for results

theDreamer 12-06-2012 07:34 AM

Quote:

Originally Posted by LukasC (Post 2047611)
wait a second!! i thought they scratched this kit?!!?? looks like it still alive!! good god i can't wait for results

It was put on hold because the original test car backed out and they have been waiting for someone to step up to fill the rest of the testing.
Best part is a lot of the work has been done, they had the kit on the car so it was more fine tuning by the looks of it. Making sure pieces fit properly, tuning, checking for possible mistakes.

SS_Firehawk 12-06-2012 08:37 AM

Quote:

Originally Posted by LukasC (Post 2047611)
wait a second!! i thought they scratched this kit?!!?? looks like it still alive!! good god i can't wait for results

You and me both... I'm afflicted with refreshing the forum every 5 minutes, checking my email inbox and scouring the forum haha. It's a test of patience and things are just getting started. I'm not sure what fine tuning still needs done, but my car will be with them for 9 months. They most likely won't need nearly that kind of time to complete it.

Other factors that may come up is my car is very very far from stock. Some of the parts I have do need to come off. The LTH's and full exhaust will reduce the amount of pressure running in the system and may have to play with pulley's, belts and housing sizes to find what works best for the application. I also threw radiators, new hoses, a Motordyne manifold, brakes, a lot of extra stuff. They can try a host of combinations that will help them anticipate what a customer needs with stuff I already bought. I even supplied a brand new resonator for my Y pipe, they can theoretically test the difference in power and back pressure between that and a HFC. It's not a 100% to having two resonators and HFC's after the stock header, but close enough.

9 months also leaves room for them to take more of my money haha. I could go for some strengthened internals and their traction control system. Not sure how the Wife would respond to that, so I'm just gonna leave the that alone :)

showme99 12-06-2012 01:21 PM

Your wife sounds like a very understanding and patient woman. Congrats on having an awesome spouse! Good luck with the twin supercharger project.

Jordo! 12-06-2012 04:17 PM

Wow -- looking forward to details!

Rusty 12-06-2012 04:21 PM

Quote:

Originally Posted by Jordo! (Post 2048725)
Wow -- looking forward to details!

Makes two of us. :D

SS_Firehawk 12-08-2012 12:15 AM

I updated this in my journal and my old NA dark side bla blah thread, which should be dying off as it has no use for me any more haha, but does have some good information for others to make a decision on. For any historical data on the car, just peruse my journal or look in my album at the dyno sheets.

Here is a pic of my baseline and the car strapped in. This was done within an hour of it arriving, and looks to be the first pull. So no ecu adjustments on it's own were possible by the time it was strapped.

http://www.the370z.com/members/ss_fi...82-car-gtm.jpg

http://www.the370z.com/members/ss_fi...seline-std.jpg

This is where it get's fun. I linked an old dyno I converted in SAE done in March. STD and SAE are close enough. But look at the curves, dips, peaks. It's seriously exactly the same. Even the results are the same. Tuned and untuned results... exactly the same. These ECU's are a work of art.

http://www.the370z.com/members/ss_fi...2-std-dyno.jpg

So this confirms at least a good consistent snap shot of the car. I'm very sure there is extra bottled up in there that would make the graph look nicer, but it won't matter soon.

elperuano 12-08-2012 01:55 AM

Congrats Firehawk! When all said n done, I hope u truly enjoy ur beast of a ride! Should be a smile from ear to ear!

SS_Firehawk 12-08-2012 08:22 AM

Thanks for the support! I still can't help to think of everything else I still need to do to finish out the car. But then, I'll probably think of something else.To afford it all, I might have to stay here another year and I really don't care to do that haha. If I can get my yard completed, floors done, counter top, some furniture, pay the cars off, buy a daily driver and still have extra money? Then the car can take more of my money.

leighspped 12-08-2012 09:24 AM

Quote:

Originally Posted by SS_Firehawk (Post 2051197)
Thanks for the support! I still can't help to think of everything else I still need to do to finish out the car. But then, I'll probably think of something else.To afford it all, I might have to stay here another year and I really don't care to do that haha. If I can get my yard completed, floors done, counter top, some furniture, pay the cars off, buy a daily driver and still have extra money? Then the car can take more of my money.

gotta draw the line somewhere..... just bought a house to.... thankful i have a while till it gets warm on the east coast

SS_Firehawk 12-08-2012 11:18 AM

Quote:

Originally Posted by leighspped (Post 2051247)
gotta draw the line somewhere..... just bought a house to.... thankful i have a while till it gets warm on the east coast

I definitely measure my distance to that line as things go on. The Twin SC kit, or at least the cost for it to happen was already budgeted. I'm just happy I can actually bring to fruition something that used to be a dream. I think I checked my email and these threads like 100x hoping to see an update.

SPOHN 12-08-2012 07:11 PM

Sub'd

show2nite 12-08-2012 09:37 PM

Sub'D

LukasC 12-09-2012 02:24 AM

Saw on GTM's website they have the kit available to purchase already online guess it doesnt need too much work then huh?

SS_Firehawk 12-09-2012 05:47 AM

Well, they are estimating a few months at least for my project. But I wouldn't consider mine isn't a priority as they will have 9 months with the car. Because they don't have a lot of the parts required laying around, lead time is about a month before a complete kit is ready to ship. Install time, tuning, as well as chasing down any issues, I think it's an adequate estimate. I wouldn't be surprised if it took longer, but I'm not worried about it. I'll be out of the country longer.

SS_Firehawk 12-10-2012 03:55 PM

Just got off the phone with Mike@GTM. Had to personally thank they for taking my money :) . I asked them a few questions, some I'm sure you all might be interested in. Of course I asked when I should start seeing headway, and I was correct in that they should be getting balls deep into things around then. They have some tests to do on their shop cars as well, so my car is freeing up their shop car time :) . They already have the complete kit so there is no wait time for any of the parts. I still think I'll be checking my email 50x per day anyways.

He mentioned my vehicle making very respectable numbers. Big relief there as I replaced the O2 sensor and didn't have a chance to put in the new spark plugs, put the manifold back on, or change the oil. I explained that to him and helped clear up my email to him and why I was so concerned. I didn't want them chasing problems I gave them. Mike said they didn't see any issues with the baseline, as i gave a good indicator of overall health.

Next question was regarding my LTH's. HE got in to explaining the flow benching they did when first testing the VQ37VHR. The engine is really efficient at moving air and the stock headers do a damn fine job. When we start opening things up even more, the air can possibly blow right through the heads, especially with VVEL. He said they plan on doing some fluid dynamic testing to try and match the housing and pulley's to what I have running. They really don't have an accurate picture on what to expect until they start testing. He seemed confident they can get everything working properly. I'm all for taking it where no one else has.

If push comes to shove, I have my stock headers/stock cats in the garage, I would prefer not to. They're ugly haha. I'm so superficial. Who knows, maybe I have to run the kit balls to the wall to get it working with the headers, bring it!

SPOHN 12-10-2012 04:33 PM

I'd stick with the LTH regardless

Jordo! 12-11-2012 04:00 PM

Especially since valve timing is now a tunable parameter.

SS_Firehawk 12-11-2012 05:21 PM

If GTM tunes VVEL and the motor responds the way we think it does, this might be like the holy trinity of VQ supercharging. GTM SC kits, LTH/CBE, and VVEL tuning. I won't get too far ahead of myself. I don't know if GTM will be doing VVEL tuning with the standard tuning on my vehicle, and it's anyone's guess on what the results will be, let alone adding an unknown variable into the mix. I can't wait till we get to that point where we start seeing data behind all the theory.

Shamu 12-17-2012 09:39 PM

I don't really understand the dual supercharger deal? If you don't care about being smog legal why not just do dual turbos and call it done. Seems like you're injecting lots of complexity ( points of potential failure with more belts pulleys etc)? More weight more to turn more parasitic drag. Maybe I'm missing something?

It's cool from engineering standpoint but I don't get it? I'd rather see a roots type for VQ that would be cool!

And I can tell you long tube headers bumped my power significantly. The stockers do not flow well. You just need to know how to tune to higher flow.

bullitt5897 12-18-2012 12:31 AM

the problem with a roots style charger is that we do not have the space for it... Unless someone makes a hood specifically for that type of charger you wont see one...

Mike

SS_Firehawk 12-18-2012 02:29 AM

The Stage 2 C38 supercharger mounting location wouldn't allow me to run with LTH's. If you were in my position and was given this offer, I'm pretty sure you would completely understand. Outside of that, curiosity and having the chance getting something new out for the VQ were other reasons.


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