AAM Short Tail 13' Nismo baseline seems high

SS_Firehawk · 12-02-2015, 07:21 PM

So I got a baseline before I added mods. Only thing on the car are short tails. It's pretty much common knowledge within the community that they don't add power. I bought midpipes and a CAI I plan on installing soon, so I wanted to put down a baseline. In short, the numbers are:

305whp
246 lbft TQ
On a dynojet
Set to SAE.
Run in 4th.
1.04 CF, but I'm at sea level and 80°

This seems a bit high, anyone else? Thoughts?

SS_Firehawk · 12-02-2015, 08:06 PM

Fixed Link

jaytirbhaw · 12-02-2015, 08:46 PM

Strong motor ! , may be a high reading dyno.... but your torque says otherwise.

What gear was the dyno pull done in?

SS_Firehawk · 12-02-2015, 09:02 PM

It was a 4th gear pull. 4th usually reads a few hp lower from my past experience. Dynojets are lauded for their consistency, idk, maybe needs calibrated? There was an untuned Nismo they had with G3 intakes and testpipes that made the same amount of power, but it was in serious need of a tune. His TQ was at 252.

jaytirbhaw · 12-02-2015, 09:06 PM

Just saw the vid..Can't really explain that one, but hey nothing bad with power. Nice looking car btw, haven't seen one in that color in person at all

Spooler · 12-02-2015, 09:40 PM

The Nismo's put out 350hp at the engine. Sounds right. They should not dyno the same a s a normal 370z.

Duc_Z09 · 12-02-2015, 09:52 PM

Quote:

Originally Posted by Spooler

The Nismo's put out 350hp at the engine. Sounds right. They should not dyno the same a s a normal 370z.

Over 300 still seems high IMO if a base 370 usually puts down 280ish at the wheels and the Nismo only makes a claimed 18hp more at the crank (probably less).

Nismo owner here, btw.

SS_Firehawk · 12-02-2015, 10:19 PM

15% drivetrains loss is 295. Im happy she's running strong, a bit rich, but that's like overhead for mods lol. There weren't any spikes or dips. Looks like it really wants more air

Duc_Z09 · 12-03-2015, 01:21 PM

Quote:

Originally Posted by SS_Firehawk

15% drivetrains loss is 295. Im happy she's running strong, a bit rich, but that's like overhead for mods lol. There weren't any spikes or dips. Looks like it really wants more air

They say Stillen Gen 3 intakes really make a difference. I wouldn't know since I'm just using K&N drop-ins and stock exhaust (for now).

D.Stillwell · 12-03-2015, 01:31 PM

Why would the dyno be done in 4th?

5th gear = 1:1 ratio

Your numbers are not accurate, specifically the TQ which obviously shows higher in lower gear.

And your HP number is a direct result of torque anyway so, there's your answer.
Do a proper dyno next time...

SS_Firehawk · 12-03-2015, 02:20 PM

Quote:

Originally Posted by D.Stillwell

Why would the dyno be done in 4th?

5th gear = 1:1 ratio

Your numbers are not accurate, specifically the TQ which obviously shows higher in lower gear.

And your HP number is a direct result of torque anyway so, there's your answer.
Do a proper dyno next time...

I've done about 15 Dyno's with two different 370Z's. Torque doesn't show higher in lower gears. 5th is the 1:1, but you won't reach 7500rpm unless you remove the speed limiter with Uprev or Ecutek. And when I say within a few horsepower, it's literally less then 3. So don't try and fact check me and tell me to do a proper effing dyno. I took it to Z Fever. I didn't specify which gear. I think they've done enough dyno's to know which one is the 1:1 and why they chose 4th. It's negligible. Speaking of, I'll pull the DRF off my drive and take a closer look.

kenchan · 12-03-2015, 02:29 PM

the fujimura canisters have decent gains vs the stock muffler according to fujimura on top of the weight savings, so i bet ur gains are pretty accurate with the shortails.

SS_Firehawk · 12-03-2015, 02:39 PM

SS_Firehawk · 12-03-2015, 02:40 PM

Quote:

Originally Posted by kenchan

the fujimura canisters have decent gains vs the stock muffler according to fujimura on top of the weight savings, so i bet ur gains are pretty accurate with the shortails.

I would guess no more than 5 if there were gains. But it's really the only variable. I've never seen a dyno where short tails made power outside the margin of error

kenchan · 12-03-2015, 03:22 PM

Quote:

Originally Posted by SS_Firehawk

I would guess no more than 5 if there were gains. But it's really the only variable. I've never seen a dyno where short tails made power outside the margin of error

hummm... from the looks of it, the Z muffler is pretty restrictive probably due to noise restrictions (or just being neighbor friendly in tiny japan suburbs).

fujimura muffler-only:
output 303.4ps => 315.1ps
torque 34.9kg => 36kg

12-02-2015, 07:21 PM	#1 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	AAM Short Tail 13' Nismo baseline seems high So I got a baseline before I added mods. Only thing on the car are short tails. It's pretty much common knowledge within the community that they don't add power. I bought midpipes and a CAI I plan on installing soon, so I wanted to put down a baseline. In short, the numbers are: 305whp 246 lbft TQ On a dynojet Set to SAE. Run in 4th. 1.04 CF, but I'm at sea level and 80° This seems a bit high, anyone else? Thoughts? __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction Last edited by SS_Firehawk; 12-03-2015 at 02:48 PM. Reason: fixed Youtube links

12-02-2015, 08:06 PM	#2 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	Fixed Link __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

12-02-2015, 08:46 PM	#3 (permalink)
jaytirbhaw Track Member Join Date: Dec 2009 Location: NYC Posts: 814 Drives: 350z HR , Nismo 370z Rep Power: 17	Strong motor ! , may be a high reading dyno.... but your torque says otherwise. What gear was the dyno pull done in? SS_Firehawk likes this. __________________ 2014 Nismo #350 , Built Motor, Top Mount Single Turbo .... 620 whp/ 500 lbs wtq 2012 Track/Drift Z, build coming soon. Build Thread - http://www.the370z.com/members-370z-...70z-build.html

12-02-2015, 09:02 PM	#4 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	It was a 4th gear pull. 4th usually reads a few hp lower from my past experience. Dynojets are lauded for their consistency, idk, maybe needs calibrated? There was an untuned Nismo they had with G3 intakes and testpipes that made the same amount of power, but it was in serious need of a tune. His TQ was at 252. jaytirbhaw likes this. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction Last edited by SS_Firehawk; 12-02-2015 at 09:07 PM.

12-02-2015, 09:06 PM	#5 (permalink)
jaytirbhaw Track Member Join Date: Dec 2009 Location: NYC Posts: 814 Drives: 350z HR , Nismo 370z Rep Power: 17	Just saw the vid..Can't really explain that one, but hey nothing bad with power. Nice looking car btw, haven't seen one in that color in person at all SS_Firehawk likes this. __________________ 2014 Nismo #350 , Built Motor, Top Mount Single Turbo .... 620 whp/ 500 lbs wtq 2012 Track/Drift Z, build coming soon. Build Thread - http://www.the370z.com/members-370z-...70z-build.html

12-02-2015, 09:40 PM	#6 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,830 Drives: 2013 Nismo 370z Rep Power: 2684392	The Nismo's put out 350hp at the engine. Sounds right. They should not dyno the same a s a normal 370z.

12-02-2015, 10:19 PM	#8 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	15% drivetrains loss is 295. Im happy she's running strong, a bit rich, but that's like overhead for mods lol. There weren't any spikes or dips. Looks like it really wants more air jaytirbhaw likes this. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

12-03-2015, 01:31 PM	#10 (permalink)
D.Stillwell Enthusiast Member Join Date: Sep 2015 Location: Snakeden Branch, VA Posts: 396 Drives: Fairlady Z34/6MT Rep Power: 19	Why would the dyno be done in 4th? 5th gear = 1:1 ratio Your numbers are not accurate, specifically the TQ which obviously shows higher in lower gear. And your HP number is a direct result of torque anyway so, there's your answer. Do a proper dyno next time...

12-03-2015, 02:29 PM	#12 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	the fujimura canisters have decent gains vs the stock muffler according to fujimura on top of the weight savings, so i bet ur gains are pretty accurate with the shortails. SS_Firehawk likes this.

12-03-2015, 02:39 PM	#13 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	__________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

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