In-House GTM Stage 2 SC Install\Tune

Mike@GTM · 11-14-2011, 04:51 PM

Quote:

Originally Posted by Nixlimited

That all makes sense, but I am looking at the 400 WTQ dyno and noticing that you are making less HP than a several other STG 2 SCs, though you are making substantially more WTQ. That's what is confusing me. Because the SC is basically linear with boost through the RPM range, I don't get how you are making so much more torque and not a ton more horsepower. Were you make 400 torque and 550+ whp, then it would seem to track your other results more closely.

Quote:

Originally Posted by Mike@GTM

Yes, it's possible. Here's a graph of the Stage 2 with a smaller diameter pulley making 400wtq. Notice that the pull ends at 6200rpm because we stopped the pull...we were making 14psi of boost which was more than we wanted to make. The stage 2 is a real powerhouse once you start spinning it up.

Normally, we ship the Stage 2 with a 92mm pulley that is good for 500whp on 93 octane gas. Kosstick wanted less power and got the 96mm pulley instead.

See the bolded section for your answer.

Nixlimited · 11-14-2011, 08:13 PM

Quote:

Originally Posted by Mike@GTM

See the bolded section for your answer.

Ohhhhhhhhhhhhhh. DUH. Sorry I missed that the first time. I was actually looking at that thinking, 6200 seems like an awfully low redline. Question indeed answered.

kosstick · 11-14-2011, 09:00 PM

Quote:

Originally Posted by Mike@GTM

Yes, it's possible. Here's a graph of the Stage 2 with a smaller diameter pulley making 400wtq. Notice that the pull ends at 6200rpm because we stopped the pull...we were making 14psi of boost which was more than we wanted to make. The stage 2 is a real powerhouse once you start spinning it up.

Normally, we ship the Stage 2 with a 92mm pulley that is good for 500whp on 93 octane gas. Kosstick wanted less power and got the 96mm pulley instead.

seems like the general increase per 1k rpm is 100 WHP just like my set up.

So this car is possibly making 530-550 whp?

Mike@GTM · 11-15-2011, 11:42 AM

Quote:

Originally Posted by Nixlimited

Ohhhhhhhhhhhhhh. DUH. Sorry I missed that the first time. I was actually looking at that thinking, 6200 seems like an awfully low redline. Question indeed answered.

No problem.

Quote:

Originally Posted by kosstick

seems like the general increase per 1k rpm is 100 WHP just like my set up.

So this car is possibly making 530-550 whp?

After examining your dyno graph, you are making 75whp per 1k rpm increase.

4500 rpm -> 260whp
5500 rpm -> 335whp
6500 rpm -> 410whp

Yes, the car we were testing was making 100whp per 1k rpm increase and could have made 550whp, but we stopped the pull because it was more than we wanted to make.

kosstick · 11-15-2011, 11:58 AM

Quote:

Originally Posted by Mike@GTM

No problem.

After examining your dyno graph, you are making 75whp per 1k rpm increase.

4500 rpm -> 260whp
5500 rpm -> 335whp
6500 rpm -> 410whp

Yes, the car we were testing was making 100whp per 1k rpm increase and could have made 550whp, but we stopped the pull because it was more than we wanted to make.

Mike, On my new dyne I think i was making 100 per 1k but i could be wrong, Seb can you post the final run with 463 / 335?

NYBladeZ · 11-14-2011, 10:41 AM

I'm surprised that your setup and GTM's setup are looking at a 40whp difference considering you guys also use a dyno jet? Is it because you guys didn't push more than 8.5psi? Did you guys not feel comfortable pushing it to 10psi? Considering that UpRev allows for multiple maps why not set one map as the safer daily use and one aggressive map pushing to 10psi? The user could switch whenever he wanted.

Neo187H · 11-14-2011, 10:52 AM

Quote:

Originally Posted by NYBladeZ

I'm surprised that your setup and GTM's setup are looking at a 40whp difference considering you guys also use a dyno jet? Is it because you guys didn't push more than 8.5psi? Did you guys not feel comfortable pushing it to 10psi? Considering that UpRev allows for multiple maps why not set one map as the safer daily use and one aggressive map pushing to 10psi? The user could switch whenever he wanted.

SC boost levels aren't easily switched like that, it requires physically changing the pulley on the SC assembly.

kosstick · 11-14-2011, 11:03 AM

Quote:

Originally Posted by NYBladeZ

I'm surprised that your setup and GTM's setup are looking at a 40whp difference considering you guys also use a dyno jet? Is it because you guys didn't push more than 8.5psi? Did you guys not feel comfortable pushing it to 10psi? Considering that UpRev allows for multiple maps why not set one map as the safer daily use and one aggressive map pushing to 10psi? The user could switch whenever he wanted.

I have the larger pulley installed, once I go to 9+ psi we should se a dif.

7.5 - 8.5 made 35+ whp.

NYBladeZ · 11-14-2011, 11:35 AM

Great! I know its been mentioned by GTM that swapping out pulleys is a pretty simple task. Do you find that to be true? If their SC kit can get 500whp that would be amazing.

Seb@SZ · 11-14-2011, 11:46 AM

Quote:

Originally Posted by NYBladeZ

Great! I know its been mentioned by GTM that swapping out pulleys is a pretty simple task. Do you find that to be true? If their SC kit can get 500whp that would be amazing.

Yes, swapping pulleys is straightforward. Making more power isn't the issue (with the right pulley). It's the life of the stock 7AT that starts becoming an issue at level near and past 500whp.

Jamaica · 11-14-2011, 12:15 PM

Quote:

Originally Posted by NYBladeZ

Great! I know its been mentioned by GTM that swapping out pulleys is a pretty simple task. Do you find that to be true? If their SC kit can get 500whp that would be amazing.

The gtm kit can make 500whp. There's a few out there. Only one auto barely pushing 500whp

NYBladeZ · 11-14-2011, 12:36 PM

Any additional benefits to be had by going with a more intense fuel system and running e85?

Seb@SZ · 11-14-2011, 02:22 PM

Quote:

Originally Posted by NYBladeZ

Any additional benefits to be had by going with a more intense fuel system and running e85?

You can run higher boost 11+ psi and timing with E85 since it's a higher octane fuel. You will need to supply the engine with 30-40% more fueling so you will need two Walbro fuel pumps and close to 800-1000 cc fuel injectors.

NYBladeZ · 11-14-2011, 02:42 PM

Yeah I discussed the pros and cons with another member on here. Phunk is running e85 on his Greddy TT setup. Even if e85 was used, wouldn't 11+ psi go above and beyond current stock internal capabilities?

SPOHN · 11-14-2011, 03:14 PM

^ Noice

11-14-2011, 10:41 AM	#6 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 21	I'm surprised that your setup and GTM's setup are looking at a 40whp difference considering you guys also use a dyno jet? Is it because you guys didn't push more than 8.5psi? Did you guys not feel comfortable pushing it to 10psi? Considering that UpRev allows for multiple maps why not set one map as the safer daily use and one aggressive map pushing to 10psi? The user could switch whenever he wanted. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

11-14-2011, 11:35 AM	#9 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 21	Great! I know its been mentioned by GTM that swapping out pulleys is a pretty simple task. Do you find that to be true? If their SC kit can get 500whp that would be amazing. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

11-14-2011, 12:36 PM	#12 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 21	Any additional benefits to be had by going with a more intense fuel system and running e85? __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

11-14-2011, 02:42 PM	#14 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 21	Yeah I discussed the pros and cons with another member on here. Phunk is running e85 on his Greddy TT setup. Even if e85 was used, wouldn't 11+ psi go above and beyond current stock internal capabilities? __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

11-14-2011, 03:14 PM	#15 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 222	^ Noice __________________

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