100hp / Liter

Jordo! · 10-20-2011, 08:18 AM

Cool -- keep us posted!

John@Z1 · 10-20-2011, 08:42 AM

Gen 3 intakes, headers and testpipe or Long tube headers and a really good exhaust system. The tune will clean it up after the upgrades.

Cmike2780 · 10-20-2011, 02:07 PM

I came up with this a while back, which kind of gives you a ballpark figure comparing engine hp vs rwhp.

Basically need at least 3 known variables.
1.A baseline engine (assuming 332hp)
2.A baseline @ the wheels on a rolling dyno (stock)
3.A final number @ the wheels on a rolling dyno (with all bolt-on mods, etc.)

Quote:

Assuming 332hp @the crank & 275hp baseline @the wheels.

332 bhp x Y (whp gain)/275 whp= X (bhp gain)

Example 1:
for a 20 whp gain on the final dyno reading with all mods

332 bhp x 20whp/275 whp= 24.15 bhp gain
332 bhp + 24.15 bhp gain= 356.15 bhp @ crank

Example 2:
5 whp gain on the final dyno reading with all mods

332 bhp x 5whp/275 whp= 6.04 bhp gain
332 bhp + 6.04 bhp gain= 338.04 bhp @ crank

Methodical4u · 10-20-2011, 02:47 PM

370 at the crank wouldn't be nearly as hard... now 370 at the wheels? That's a little different story.

murphman · 10-20-2011, 03:21 PM

by crank i am assuming the OP means bhp? if this is the case then making 370 base hp is very obtainable. IF the dyno you were using was infact accurate not just a way to measure increase after mods i would say 315 whp is all you need. Last time i checked a normal drivetrain loss was 15-18% maybe that has changed in newer verhicles but 315 whp would put you between 370-385 bhp

Decker@Forged · 10-20-2011, 05:38 PM

Long tube intakes, headers, test pipes, and a cat-back exhaust will put you at around 305whp-315whp on our DD dyno. If you reeeeeeally want the 370whp ... here's your answer

Forged Performance: Stillen SC Custom Tune and Review

pulpmelon_Z · 10-21-2011, 06:14 AM

The Z is staying all motor, I do alot of miles in her so gas milage cannot suffer.

Intake, cats, exhaust and tune is as far as it will go.

If I dont make 370hp, I wont lose any sleep... I just wanted to know if that was realistic with bolt-ons.

VQStryker · 10-21-2011, 06:58 AM

I/H/E high octane fuel (100+), aggressive tune, nst pulley set and you should get 370 crank....

Stillen g3
Straight true dual exhaust
headers 4-2-1 or 4-1
Tp's
nst pulley set
100+ octane
aggressive tune
flywheel

^^^ do this or go with a SC up to you.

Jordo! · 10-21-2011, 10:54 AM

Regarding drive train losses, the value one obtains will vary depending on the dyno, but since dynojets are highly consistent from shop to shop, I like to go by them for estimating this stuff...

Based on multiple dynos from at least 9-10 different Z's, with SAE correction, this is what I've found:

Average power for 370Z or G37: 273 +/-5

Average power for Nismo version: 290 +/-5

Drive train losses for both AT and MT appear to be between 16.5% and 17.5%

You get a few outliers here and there; lower values appear to be associated with few miles on engine, suggesting incomplete break-in and compression may go up later on, resulting in higher power figures (unconfirmed).

Higher outliers could reflect everything from weather fluctuations to the ECU being unusually charitable with the max timing it allowed on a given run.

Also, you get some variance due to the gear dynoed in, with slightly higher readings associated with dynos taken in 5th vs. 4th.

Only other major factor is that lots of folks like to report STD corrections, which I find tend to skew optimistically for N/A cars.

Again those values are the average (arithmetic mean) based on a realtively small sample, with more data the numbers may be updated slightly (please send me drf's!!!!

).

Pelican170 · 10-21-2011, 12:41 PM

I thought the correct gear to do it was in 5th for the 1:1 ratio?

Jordo! · 10-21-2011, 10:35 PM

Quote:

Originally Posted by Pelican170

I thought the correct gear to do it was in 5th for the 1:1 ratio?

It is, but untuned 7AT's will hit the limiter and need to dyno in 4th, so most drf's from the auto or based on 4th gear runs.

Also, 4th puts less wear on the motor... mine was not very happy going 170 mph on a 98* F 90% humidity day just to try and see 2-3 more lbft of peak torque

Anyway, the difference is really small in output between 4th and 5th -- literally only a few whp/tqs. You can dyno in either just fine, and get accurate and virtually identical values, although technically 5th would be the correct one in terms of gear ratio.

pulpmelon_Z · 10-24-2011, 06:04 AM

Speaking of tunes, can you program in a launch control limiter in the Uprev software?

10-20-2011, 08:18 AM	#1 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 419	Cool -- keep us posted! __________________ Enjoy it. Destroy it.

10-20-2011, 08:42 AM	#2 (permalink)
John@Z1 The370Z.com Sponsor Join Date: Nov 2008 Location: GA Posts: 1,589 Drives: Turbos Rep Power: 20	Gen 3 intakes, headers and testpipe or Long tube headers and a really good exhaust system. The tune will clean it up after the upgrades. __________________ Z1 Motorsports will beat any advertised price on Nissan OEM Parts! 770-838-7777 ext 311 AIM: JohnatZ1 email: John@Z1motorsports.com

10-20-2011, 03:21 PM	#5 (permalink)
murphman Track Member Join Date: Dec 2009 Location: houston Posts: 611 Drives: 370z Tour Black 7AT Rep Power: 17	by crank i am assuming the OP means bhp? if this is the case then making 370 base hp is very obtainable. IF the dyno you were using was infact accurate not just a way to measure increase after mods i would say 315 whp is all you need. Last time i checked a normal drivetrain loss was 15-18% maybe that has changed in newer verhicles but 315 whp would put you between 370-385 bhp __________________ Mod List: FI 18" CBE// Eibach Springs// Rear Camber kit// Ingen CAI//

10-21-2011, 10:54 AM	#9 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 419	Regarding drive train losses, the value one obtains will vary depending on the dyno, but since dynojets are highly consistent from shop to shop, I like to go by them for estimating this stuff... Based on multiple dynos from at least 9-10 different Z's, with SAE correction, this is what I've found: Average power for 370Z or G37: 273 +/-5 Average power for Nismo version: 290 +/-5 Drive train losses for both AT and MT appear to be between 16.5% and 17.5% You get a few outliers here and there; lower values appear to be associated with few miles on engine, suggesting incomplete break-in and compression may go up later on, resulting in higher power figures (unconfirmed). Higher outliers could reflect everything from weather fluctuations to the ECU being unusually charitable with the max timing it allowed on a given run. Also, you get some variance due to the gear dynoed in, with slightly higher readings associated with dynos taken in 5th vs. 4th. Only other major factor is that lots of folks like to report STD corrections, which I find tend to skew optimistically for N/A cars. Again those values are the average (arithmetic mean) based on a realtively small sample, with more data the numbers may be updated slightly (please send me drf's!!!! ). __________________ Enjoy it. Destroy it. Last edited by Jordo!; 10-21-2011 at 10:58 AM.

10-21-2011, 12:41 PM	#10 (permalink)
Pelican170 Track Member Join Date: Jul 2010 Location: Sandy Hook, CT Posts: 972 Drives: Nissan 370z Nismo Rep Power: 17	I thought the correct gear to do it was in 5th for the 1:1 ratio? __________________ Fast Intentions CF Exhaust - Fast Intentions HFC's - HPS Tubes w/ AFE Dry Flow Filter's

10-20-2011, 02:47 PM	#4 (permalink)
Methodical4u A True Z Fanatic Join Date: Jun 2011 Location: Maryland Posts: 1,393 Drives: 11 370 6mt pw w/sp Rep Power: 17	370 at the crank wouldn't be nearly as hard... now 370 at the wheels? That's a little different story.

10-20-2011, 05:38 PM	#6 (permalink)
Decker@Forged The370Z.com Sponsor Join Date: Oct 2009 Location: Alpharetta, GA Posts: 340 Drives: 2JZ 240sx Rep Power: 0	Long tube intakes, headers, test pipes, and a cat-back exhaust will put you at around 305whp-315whp on our DD dyno. If you reeeeeeally want the 370whp ... here's your answer Forged Performance: Stillen SC Custom Tune and Review

10-21-2011, 06:14 AM	#7 (permalink)
pulpmelon_Z Base Member Join Date: Oct 2011 Location: UK Posts: 23 Drives: 370z Rep Power: 14	The Z is staying all motor, I do alot of miles in her so gas milage cannot suffer. Intake, cats, exhaust and tune is as far as it will go. If I dont make 370hp, I wont lose any sleep... I just wanted to know if that was realistic with bolt-ons.

10-21-2011, 06:58 AM	#8 (permalink)
VQStryker Track Member Join Date: Jul 2011 Location: Texas Age: 36 Posts: 659 Drives: :( Rep Power: 16	I/H/E high octane fuel (100+), aggressive tune, nst pulley set and you should get 370 crank.... Stillen g3 Straight true dual exhaust headers 4-2-1 or 4-1 Tp's nst pulley set 100+ octane aggressive tune flywheel ^^^ do this or go with a SC up to you.

10-24-2011, 06:04 AM	#12 (permalink)
pulpmelon_Z Base Member Join Date: Oct 2011 Location: UK Posts: 23 Drives: 370z Rep Power: 14	Speaking of tunes, can you program in a launch control limiter in the Uprev software?

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