Any 370s running higher than 20psi?

GoDZiLLa_845 · 12-25-2009, 11:13 AM

correction: the rb26's block is rumored to be capable of withstanding up to2500hp

ive heard of topsecret's skyline r34 making 1750hp

nogoodname · 12-25-2009, 11:22 AM

Get a forged vq37 engine block and do what you want lol

stock block can go to 11 psi max and that was pushing it.

G37Sam · 12-25-2009, 11:26 AM

Godzilla you need to do a lot more reading IMO, you're too concerned with final numbers without giving a damn about the process

Goto HowStuffWorks - Learn How Everything Works! and read articles there. Read about how they work and all. We were all noobs once

BoBoTee · 12-25-2009, 12:17 PM

Quote:

Originally Posted by 370Zsteve

Just curious, how did the Mitsu engine hold up under 22psi/24psi? Any smoke coming out of the exhaust that was maybe darker then usual? I wish I had a dime for every Evo and WRX I've seen over the past few years that were burning oil at an alarming rate.

Nope never blew any dark smoke, or burned alot of oil. I would blame that on the tuning, and parts selected. The stock internal holds up to 500awhp before it needs an upgrade. Even though you can push 500awhp on the stocker that's not an everyday thing. I ran 22.5psi consistently on a daily basis and 24psi on colder days and that's on a stock td0516g/10.5 hotside I dyno'd low but ran faster on the street then others that dyno'd higher. Weird.

BoBoTee · 12-25-2009, 12:22 PM

Quote:

Originally Posted by KingDavid

PSI is somewhat irrelevant. You should be asking how much power can these cars handle stock block. Because, my god, 25 psi on a t28 is NOT 25 psi on a gt40.

true 25psi on a t28 is not the same on a 3076,gt30,gt35r,gt40. I don't agree that psi is irrelevant though.

KingDavid · 12-25-2009, 12:24 PM

Quote:

Originally Posted by 370zsteve

the one that sophiaz's mechanic rebuilt!

rotflmao!!!!

Kidcane · 12-25-2009, 01:16 PM

I want 42 psi. Should put me right at about 3000HP

kannibul · 12-25-2009, 02:14 PM

Quote:

Originally Posted by GoDZiLLa_845

just wondering...looking for results..i plan to purchase a kit..

p.s. not sure if im in right thread so dont flame me plz...seemed right-ish

20 PSI?

People are getting 500+ HP from 6-8 PSI...I can't imagine A) what levels of HP 20PSI would produce, and B) How long that engine would last, C) What else it would take to make sure that power gets delivered to the ground...ie, is usable gains...

kannibul · 12-25-2009, 02:16 PM

Quote:

Originally Posted by BoBoTee

You can't run 20psi on a stock block 370z like you can on the Sti or Evo. Those cars have a low compression 8.5:1 ratio made for boosting. The Z I think is 11:1 ratio. With high compression your are already generating alot of heat and adding an additional 20psi is going to blow the VQ37 to kingdomcome. I think the most boost you can run on the VQ37 from what I've read is around 8psi max on 93 oct. and that's considered high. When I had my Evo I was running 22psi daily driven and 24psi when in race mode all on 93octane.hehe.

butt dood, if you dont run 20spi, you can't hang with teh sti.

Snakes709 · 12-25-2009, 02:32 PM

I'll get serious. Here is a example i like to use.(numbers are just guessing) Say your power goal is 400whp. With the compression ratio of a evo (not sure what it is, lets just say 8:5:1) u will have to run 26psi of boost to hit that. However since the Z is 11:1 u will only have to run 5-6psi to hit that with the same turbo.

Modshack · 12-25-2009, 03:17 PM

Quote:

Originally Posted by KingDavid

Different blocks, different applications, yada yada yada...Make a power goal for yourself and build towards that. You want good power and torque?

Exactly....Most Applications in the works for the Z will be in the 6-10psi area and punch you up 100hp (or more).

I work with Audi turbos all the time that will hold a steady 22-23psi, but that's a block that was originally designed as a diesel.

Every block has certain limitations to say nothing of the rods and bottom end.. Don't use PSI as the be all/end all

GoDZiLLa_845 · 12-25-2009, 04:31 PM

Quote:

Originally Posted by G37Sam

Godzilla you need to do a lot more reading IMO, you're too concerned with final numbers without giving a damn about the process

Goto HowStuffWorks - Learn How Everything Works! and read articles there. Read about how they work and all. We were all noobs once

I wish i finished my high school...i gtta go back and get my ged while its still early...im 20 and ive always been fascinated by cars since 5yrs old...when i was 5, the car i always talked about was the dodge viper, RT/10 tbe...for a few years i wanted to go to a school and learn ie lincolntech or itt or wyotech..i actually have a friend that goes to a school i cannot recall of the name, but he is ther for 2yrs now... he wants to become a porsche tech. but other than a school, you guys have any reccomendations? the most ive ever did to a car was install on my ex 06 m3 a cf diffuser and some foglights and swapping out my wheels. Ive always wanted a hands on exp. Yes i am a noob indeed...i am intimidated by you guys alot (ur logic in cars to be exact)...sorry for wasting all of your time (your as in all of you in general)

thnx

ps my posting suxx i know its just the way i say it..maybe u guys can teach me how... heh

LiquidZ · 12-25-2009, 04:50 PM

Quote:

Originally Posted by GoDZiLLa_845

I wish i finished my high school...i gtta go back and get my ged while its still early...im 20 and ive always been fascinated by cars since 5yrs old...when i was 5, the car i always talked about was the dodge viper, RT/10 tbe...for a few years i wanted to go to a school and learn ie lincolntech or itt or wyotech..i actually have a friend that goes to a school i cannot recall of the name, but he is ther for 2yrs now... he wants to become a porsche tech. but other than a school, you guys have any reccomendations? the most ive ever did to a car was install on my ex 06 m3 a cf diffuser and some foglights and swapping out my wheels. Ive always wanted a hands on exp. Yes i am a noob indeed...i am intimidated by you guys alot (ur logic in cars to be exact)...sorry for wasting all of your time (your as in all of you in general)

thnx

ps my posting suxx i know its just the way i say it..maybe u guys can teach me how... heh

Don't apologize. We all start somewhere, just follow your dreams.

Togo · 12-25-2009, 07:29 PM

The RB26DETT is a turbo motor from the get go Godzilla, it's designed to hold boost. The VQ37VHR motor is a NA motor and not designed for the same purpose. If you want to boost the piss out of the 370Z's motor, get a built block complete with pistons, studs, rods, even sleeves if you wish, slap on a mammoth turbo kit and go to town. Be prepared to pay out the ass to do it though

RCZ · 12-25-2009, 08:14 PM

umm.... its all about compression. The STI has much lower compression than the Z because the STI is turbo from the factory and thats one way to make turbo cars safer. Lower compression engines need higher boost to achieve the same amount of power. A stock sti runs around 17psi. My built STI ran 25psi on a big turbo all day long. Some supras out there run 35 psi and some old turbo F1 cars ran upwards of 5 BAR, which is more than 60 PSI. (made 1200hp from a 1.3L motor)

So you aren't going to get flamed.

The Z has a higher compression engine because it is originally NA and thus it needs less boost to make power. Its not exactly the greatest idea to boost a high compression engine because theres greater stress on the internals, however it can be done safely. From what I've been reading the stock VQ37 can handle around 6psi. The other thing you have to keep in mind is the size of the turbo in relation to its efficiency zone. A big turbo will have a much easier time making 20psi than a smaller turbo will. When a turbo goes beyond it's efficiency zone, it starts blowing very hot air which is not a good thing for making power or for engine longevity. I'm not going to go into CFM and flow volume, but thats also part of the equation.

Anyway, no there aren't any VQ37 Z's running 20psi because as far as I know, no one has modified internals to lower the compression. 20psi on a stock 370z = 1000rwhp+ for like 2 seconds before it blows itself to pieces.

12-25-2009, 11:26 AM	#18 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 21	Godzilla you need to do a lot more reading IMO, you're too concerned with final numbers without giving a damn about the process Goto HowStuffWorks - Learn How Everything Works! and read articles there. Read about how they work and all. We were all noobs once __________________ '14 Viper GTS '08 RB'd G37S - Sold

12-25-2009, 02:32 PM	#25 (permalink)
Snakes709 A True Z Fanatic Join Date: Aug 2009 Location: Edmonton Posts: 1,205 Drives: 2011 Evo-X GSR Rep Power: 18	I'll get serious. Here is a example i like to use.(numbers are just guessing) Say your power goal is 400whp. With the compression ratio of a evo (not sure what it is, lets just say 8:5:1) u will have to run 26psi of boost to hit that. However since the Z is 11:1 u will only have to run 5-6psi to hit that with the same turbo. Last edited by Snakes709; 12-25-2009 at 02:37 PM.

12-25-2009, 07:29 PM	#29 (permalink)
Togo A True Z Fanatic Join Date: May 2009 Location: E. Northport, NY Posts: 7,597 Drives: Stuff Rep Power: 657	The RB26DETT is a turbo motor from the get go Godzilla, it's designed to hold boost. The VQ37VHR motor is a NA motor and not designed for the same purpose. If you want to boost the piss out of the 370Z's motor, get a built block complete with pistons, studs, rods, even sleeves if you wish, slap on a mammoth turbo kit and go to town. Be prepared to pay out the ass to do it though __________________ This will decimate all after you put about fifteen grand in it or more, and if we have to, overnight parts from Japan. Joe Clem and Koeppel Nissan

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12-25-2009, 11:13 AM	#16 (permalink)
GoDZiLLa_845 Base Member Join Date: Dec 2009 Location: NY Posts: 9 Drives: 10' 370Z Rep Power: 16	correction: the rb26's block is rumored to be capable of withstanding up to2500hp ive heard of topsecret's skyline r34 making 1750hp

12-25-2009, 11:22 AM	#17 (permalink)
nogoodname Lifetime Premium Join Date: Nov 2008 Location: Montreal Posts: 22,357 Drives: E46 M3 Rep Power: 1765	Get a forged vq37 engine block and do what you want lol stock block can go to 11 psi max and that was pushing it.

12-25-2009, 01:16 PM	#22 (permalink)
Kidcane Base Member Join Date: Dec 2009 Location: Tampa Posts: 73 Drives: 2008 G37S Rep Power: 16	I want 42 psi. Should put me right at about 3000HP

12-25-2009, 08:14 PM	#30 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	umm.... its all about compression. The STI has much lower compression than the Z because the STI is turbo from the factory and thats one way to make turbo cars safer. Lower compression engines need higher boost to achieve the same amount of power. A stock sti runs around 17psi. My built STI ran 25psi on a big turbo all day long. Some supras out there run 35 psi and some old turbo F1 cars ran upwards of 5 BAR, which is more than 60 PSI. (made 1200hp from a 1.3L motor) So you aren't going to get flamed. The Z has a higher compression engine because it is originally NA and thus it needs less boost to make power. Its not exactly the greatest idea to boost a high compression engine because theres greater stress on the internals, however it can be done safely. From what I've been reading the stock VQ37 can handle around 6psi. The other thing you have to keep in mind is the size of the turbo in relation to its efficiency zone. A big turbo will have a much easier time making 20psi than a smaller turbo will. When a turbo goes beyond it's efficiency zone, it starts blowing very hot air which is not a good thing for making power or for engine longevity. I'm not going to go into CFM and flow volume, but thats also part of the equation. Anyway, no there aren't any VQ37 Z's running 20psi because as far as I know, no one has modified internals to lower the compression. 20psi on a stock 370z = 1000rwhp+ for like 2 seconds before it blows itself to pieces.