GT Motorsports: 370Z Stock block testing, and turbo system development

DeadZero · 10-07-2009, 12:58 AM

what i'm really curious about is whats the limit on these motors. I'd like a safe 400 low boost setting and possible a mid 500hp high boost setting. Safely on a stock block.

Has it been discussed about lowering the compressions on these motors to 9:1???

B1nks · 10-07-2009, 07:59 AM

Quote:

Originally Posted by DeadZero

what i'm really curious about is whats the limit on these motors. I'd like a safe 400 low boost setting and possible a mid 500hp high boost setting. Safely on a stock block.

Has it been discussed about lowering the compressions on these motors to 9:1???

Yeah but if you lowered the compression then you'd have to up the PSI which would equate no differently on the stress put on the motor to achieve the same horsepower. 400 is easily done on stock block but mid 500 you probably would want to start to secure your investment more.

LiquidZ · 10-07-2009, 08:27 AM

Quote:

Originally Posted by DeadZero

what i'm really curious about is whats the limit on these motors. I'd like a safe 400 low boost setting and possible a mid 500hp high boost setting. Safely on a stock block.

Has it been discussed about lowering the compressions on these motors to 9:1???

If I had the money, I would maintain the stock compression with a forged roatating assembly and stick about 10 psi into the combustion chambers.

Zguy · 10-08-2009, 04:44 PM

I think what he was trying to say with the unequal sized turboes is running the 2 exhausts into a Y pipe that would feed into the smaller turbo to spool up a larger turbo that would in turn be fed to a one inlet 2 outlet IC and on to the TB's and plenum...... I have always wanted to try it because in theory it would work but as far as if it would be cost efficient that is what I dont know. Having a small turbo that spools quickly would still push boost into the plenum then once there was enough pressure the large turbo would spool I guess theoretically you might be able to have boost through out more of the power band. Who knows lol

1slow370 · 10-09-2009, 07:38 AM

OMG so many theories that are half baked or half explained in one place it should be made a crime. For the people with the differential/sequential turbo setup idea, think fd rx7(one combined cast manifold feeding the exhaust sides of two different sized turbo's with a valve that switched the flow between the two). For cars like ours a divorced bank system works great for packaging, and lets you put the turbos right next to the manifolds for the most flow and heat retention. I would suspect that the stock manifold is MOSTLY separated but retains an inner passage that links the 2 plenums together molded into the plastic. Think balance tube on a VG engine. It is nowhere near what you need to be able to run two dissimilar turbos, which wouldn't work anyway due to the uneven exhaust backpressure. You could brobably get it to work if you did a single kit and used a mazda style turbo setup but those setups are mostly crap and get changed out for single turbo setups because they aren't very good for high horsepower applications. I vote we let GTM do the thinking.

Edit: Surprised no one has thrown out series twin turbos while you're at it geez we could run like 50psi

LiquidZ · 10-09-2009, 07:15 AM

GTM, have you guys conducted any testing to see how the turbo impacts oil temperature?

bullitt5897 · 11-09-2009, 06:52 PM

I heard from a little birdy that someone in GA is getting a stage 3 kit with all the extras! I wonder who that could be...

Keep in tune guys for a full build thread with all the details! Major props to the guys over at GTM! Sam alone has made this build possible without him it would still be in the planning stages

by the way GTM has some of the BEST Customer service around!

SAM@GTM · 11-15-2009, 10:57 PM

Quote:

Originally Posted by bullitt5897

I heard from a little birdy that someone in GA is getting a stage 3 kit with all the extras! I wonder who that could be...

Keep in tune guys for a full build thread with all the details! Major props to the guys over at GTM! Sam alone has made this build possible without him it would still be in the planning stages

by the way GTM has some of the BEST Customer service around!

It is going to be an insane Project, Thanks Mike

Sam

Dpeters · 11-19-2009, 09:55 PM

Quote:

Originally Posted by bullitt5897

I heard from a little birdy that someone in GA is getting a stage 3 kit with all the extras! I wonder who that could be...

Keep in tune guys for a full build thread with all the details! Major props to the guys over at GTM! Sam alone has made this build possible without him it would still be in the planning stages

by the way GTM has some of the BEST Customer service around!

Bullitt,

Who's doing your work? I'm also in the ATL area and I wouldn't mind knowing a decent shop when I look to a TT kit for mine.

terrycs · 11-19-2009, 10:11 PM

Car sounds crazy even at idle:

http://www.youtube.com/watch?v=RvqliVlMiiw

Kastley85891 · 11-09-2009, 06:59 PM

Neat thread for discussion,, Id like 2X 18 or 20G ish size turbos with 44mm external gates, 1 for each bank of three, moderate size FMIC , spooling by 3300 in third and 3100 in fourth, nice.
What ever comes out I will watch with interest. Should ROCK

G37Sam · 11-16-2009, 12:51 AM

Tuning in!! Please keep this thread updated

bullitt5897 · 11-16-2009, 11:16 AM

ohh we will!

we are initially aiming for 500hp Daily Driven 93 octane on dyno dynamics! Our ultimate goal... 1st 1000whp Z34!

terrycs · 11-19-2009, 06:35 PM

I found a GTM powered Z. Very clean build. You in here?:

theDreamer · 11-19-2009, 06:39 PM

Nissan 370Z Forum - View Profile: 370zTwinTurbo

10-08-2009, 04:44 PM	#4 (permalink)
Zguy Base Member Join Date: Nov 2008 Location: Fort Worth Posts: 153 Drives: 05 Chrome Silver Rep Power: 18	I think what he was trying to say with the unequal sized turboes is running the 2 exhausts into a Y pipe that would feed into the smaller turbo to spool up a larger turbo that would in turn be fed to a one inlet 2 outlet IC and on to the TB's and plenum...... I have always wanted to try it because in theory it would work but as far as if it would be cost efficient that is what I dont know. Having a small turbo that spools quickly would still push boost into the plenum then once there was enough pressure the large turbo would spool I guess theoretically you might be able to have boost through out more of the power band. Who knows lol Last edited by Zguy; 10-08-2009 at 04:46 PM.

10-09-2009, 07:38 AM	#5 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7252	OMG so many theories that are half baked or half explained in one place it should be made a crime. For the people with the differential/sequential turbo setup idea, think fd rx7(one combined cast manifold feeding the exhaust sides of two different sized turbo's with a valve that switched the flow between the two). For cars like ours a divorced bank system works great for packaging, and lets you put the turbos right next to the manifolds for the most flow and heat retention. I would suspect that the stock manifold is MOSTLY separated but retains an inner passage that links the 2 plenums together molded into the plastic. Think balance tube on a VG engine. It is nowhere near what you need to be able to run two dissimilar turbos, which wouldn't work anyway due to the uneven exhaust backpressure. You could brobably get it to work if you did a single kit and used a mazda style turbo setup but those setups are mostly crap and get changed out for single turbo setups because they aren't very good for high horsepower applications. I vote we let GTM do the thinking. Edit: Surprised no one has thrown out series twin turbos while you're at it geez we could run like 50psi Last edited by 1slow370; 10-09-2009 at 07:45 AM.

10-09-2009, 07:15 AM	#6 (permalink)
LiquidZ A True Z Fanatic Join Date: Nov 2008 Location: Columbus, OH Posts: 1,940 Drives: Mag. Black 2009 370Z Rep Power: 706	GTM, have you guys conducted any testing to see how the turbo impacts oil temperature? __________________

11-09-2009, 06:52 PM	#7 (permalink)
bullitt5897 Premium Member Join Date: Jan 2009 Location: North GA Posts: 6,831 Drives: Twin Turbo Z34 Rep Power: 3684	I heard from a little birdy that someone in GA is getting a stage 3 kit with all the extras! I wonder who that could be... Keep in tune guys for a full build thread with all the details! Major props to the guys over at GTM! Sam alone has made this build possible without him it would still be in the planning stages by the way GTM has some of the BEST Customer service around! __________________ *Shop Cars: 2013 318whp Nismo VspecII 370z SOLD, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054*

11-16-2009, 12:51 AM	#12 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 22	Tuning in!! Please keep this thread updated __________________ '14 Viper GTS '08 RB'd G37S - Sold

10-07-2009, 12:58 AM	#1 (permalink)
DeadZero Base Member Join Date: Sep 2009 Location: Huntington beach Posts: 20 Drives: Currently a Mirage Rep Power: 17	what i'm really curious about is whats the limit on these motors. I'd like a safe 400 low boost setting and possible a mid 500hp high boost setting. Safely on a stock block. Has it been discussed about lowering the compressions on these motors to 9:1???

11-19-2009, 10:11 PM	#10 (permalink)
terrycs Base Member Join Date: Dec 2008 Location: La Palma, CA Posts: 123 Drives: 07 G35S Sedan Rep Power: 257	Car sounds crazy even at idle: http://www.youtube.com/watch?v=RvqliVlMiiw

11-09-2009, 06:59 PM	#11 (permalink)
Kastley85891 A True Z Fanatic Join Date: Nov 2009 Location: ATX 370 - Sold Posts: 1,149 Drives: 2003 Wagon Rep Power: 19	Neat thread for discussion,, Id like 2X 18 or 20G ish size turbos with 44mm external gates, 1 for each bank of three, moderate size FMIC , spooling by 3300 in third and 3100 in fourth, nice. What ever comes out I will watch with interest. Should ROCK

11-16-2009, 11:16 AM	#13 (permalink)
bullitt5897 Premium Member Join Date: Jan 2009 Location: North GA Posts: 6,831 Drives: Twin Turbo Z34 Rep Power: 3684	ohh we will! we are initially aiming for 500hp Daily Driven 93 octane on dyno dynamics! Our ultimate goal... 1st 1000whp Z34! __________________ *Shop Cars: 2013 318whp Nismo VspecII 370z SOLD, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054*

11-19-2009, 06:35 PM	#14 (permalink)
terrycs Base Member Join Date: Dec 2008 Location: La Palma, CA Posts: 123 Drives: 07 G35S Sedan Rep Power: 257	I found a GTM powered Z. Very clean build. You in here?: Last edited by terrycs; 11-19-2009 at 06:46 PM.

11-19-2009, 06:39 PM	#15 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4212	Nissan 370Z Forum - View Profile: 370zTwinTurbo __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

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