Injector power gain with NA?

Mino · 10-16-2012, 01:06 PM

Hey guys, I have had my Z for about 3 months now and I'm ready to start modding it I did a baseline and the car put down about 253whp stock I was told that the dyno I used read 12% lower then DynoJet. So I'm right on the 280 mark, love this car more and more every time I drive it. Here is my plan for the car I will be doing a lot of track events next year

1. 25 row oil cooler
2. 3" single exit exhaust
3. test pipes with a ebay Y-pipe
4. Stillen Gen3
5. Dyno tune
6.

Number 6 I'm thinking about doing bigger injectors but I don't plan on FI any time soon. I don't know if I will gain any power from it that's why I wanted to ask here with a tune and those mods, the injectors will they give me power? I was also thinking about doing pulleys too. Just wanted to make a bit more then 300+whp the more the better

Thank you guys.

DIGItonium · 10-16-2012, 01:41 PM

IIRC, the only reason why you would want to go for bigger injectors is because you're saturating the stock ones or you want to switch to E85. With larger injectors, you have to get a tune or your engine won't sputter at all (dumping too much fuel into the cylinders). IMO, more work than it's worth if you're not going FI.

Mino · 10-16-2012, 01:46 PM

Quote:

Originally Posted by DIGItonium

IIRC, the only reason why you would want to go for bigger injectors is because you're saturating the stock ones or you want to switch to E85. With larger injectors, you have to get a tune or your engine won't sputter at all (dumping too much fuel into the cylinders). IMO, more work than it's worth if you're not going FI.

Oh alright thank you any other bolt on mods you think I can do to make more power? except headers?

lemon-fresh · 10-16-2012, 03:37 PM

pulley kit

LafitteZ · 10-16-2012, 04:01 PM

Light clutch and flywheel asap

SS_Firehawk · 10-16-2012, 04:05 PM

M370 manifold, flywheel, TP's/ART PIPES/HFC's/RTP'S/RHFC's. Not a bolt on, but get Uprev...

Mino · 10-16-2012, 04:08 PM

Thanks guys, light weight flywheel would I need to change the stock clutch if it's in a good condition? and the flywheel would it make it loud?? that chutter sound?

DIGItonium · 10-16-2012, 04:11 PM

Maybe try to shed weight from the car? Every little bit helps... but it might cost you a bit (e.g., light weight seats, wheels, etc.).

When you go in for the tune, have them adjust the fan settings so it kicks in earlier and adjust the throttle map so the ECU will allow you to open it up more especially down low. Reference the tuning subforum.

[EDIT] IIRC, your might not be as daily drivable with this suggestion: shed weight down to 2800 lbs. Forged stripped down their stock Z to the bare essentials, and they managed to get it under 2800 lbs. or so and the car was highly competitive against the likes of Porsche on the track. Other than that... force induction is the way to go if you're going to spend more than $3k for N/A power.

Mino · 10-16-2012, 04:44 PM

Quote:

Originally Posted by DIGItonium

Maybe try to shed weight from the car? Every little bit helps... but it might cost you a bit (e.g., light weight seats, wheels, etc.).

When you go in for the tune, have them adjust the fan settings so it kicks in earlier and adjust the throttle map so the ECU will allow you to open it up more especially down low. Reference the tuning subforum.

[EDIT] IIRC, your might not be as daily drivable with this suggestion: shed weight down to 2800 lbs. Forged stripped down their stock Z to the bare essentials, and they managed to get it under 2800 lbs. or so and the car was highly competitive against the likes of Porsche on the track. Other than that... force induction is the way to go if you're going to spend more than $3k for N/A power.

Oh alright thank you what redline would you recommend? I hear some people have up to 8300 some 7800 so on. Which would be good since I will be using a lot of the 2-3rd gears without blowing my engine.

Navyboy916 · 10-16-2012, 05:42 PM

I would ht mess with the redline. I say this cause at uprev I asked the same question and due to the cams profile no power is gain passed about 7200 rpm. So I just left it where it is. Just some inside knowledge.

Mino · 10-16-2012, 06:44 PM

Quote:

Originally Posted by Navyboy916

I would ht mess with the redline. I say this cause at uprev I asked the same question and due to the cams profile no power is gain passed about 7200 rpm. So I just left it where it is. Just some inside knowledge.

Thank you anything special I should ask for when I get the uprev tune?

edub370 · 10-16-2012, 06:49 PM

Quote:

Originally Posted by lemon-fresh

pulley kit

I Wouldn't...

too many horror stories of lightweight crank pulleys welding themselves to the crank

Navyboy916 · 10-16-2012, 06:59 PM

Not really just make sure ur a/f is right around 12.63 that's what uprev said is the optimal target area. Don't mess with the redline or the line pressure for a NA car there is no reason for these. Just make sure they get the A/F ratio correct.

lemon-fresh · 10-16-2012, 07:06 PM

Quote:

Originally Posted by edub370

I Wouldn't...

too many horror stories of lightweight crank pulleys welding themselves to the crank

Not sure that's much of a horror story. The same thing can happen to the stock pulleys over time. Why would you want to remove them?

Navyboy916 · 10-16-2012, 07:09 PM

I have heard do many bad things about the pulleys. The motor is a great engine and messing with the pulleys can damage the motor. It's just my view I just wouldn't recommend it

10-16-2012, 01:06 PM	#1 (permalink)
Mino Base Member Join Date: Apr 2011 Location: SoCal 818 Posts: 248 Drives: 12 370Z BS Spt 6MT Rep Power: 14	Injector power gain with NA? Hey guys, I have had my Z for about 3 months now and I'm ready to start modding it I did a baseline and the car put down about 253whp stock I was told that the dyno I used read 12% lower then DynoJet. So I'm right on the 280 mark, love this car more and more every time I drive it. Here is my plan for the car I will be doing a lot of track events next year 1. 25 row oil cooler 2. 3" single exit exhaust 3. test pipes with a ebay Y-pipe 4. Stillen Gen3 5. Dyno tune 6. Number 6 I'm thinking about doing bigger injectors but I don't plan on FI any time soon. I don't know if I will gain any power from it that's why I wanted to ask here with a tune and those mods, the injectors will they give me power? I was also thinking about doing pulleys too. Just wanted to make a bit more then 300+whp the more the better Thank you guys. __________________ 2012 370z Sport 6MT baseline 283whp \| BBS CH-Rs \| Custom HKS single exit \| Evo-R \| Resonated TPs soon to be installed \| 4.08 Gears Coming soon

10-16-2012, 01:41 PM	#2 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	IIRC, the only reason why you would want to go for bigger injectors is because you're saturating the stock ones or you want to switch to E85. With larger injectors, you have to get a tune or your engine won't sputter at all (dumping too much fuel into the cylinders). IMO, more work than it's worth if you're not going FI. __________________

10-16-2012, 04:05 PM	#6 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	M370 manifold, flywheel, TP's/ART PIPES/HFC's/RTP'S/RHFC's. Not a bolt on, but get Uprev... __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

10-16-2012, 04:08 PM	#7 (permalink)
Mino Base Member Join Date: Apr 2011 Location: SoCal 818 Posts: 248 Drives: 12 370Z BS Spt 6MT Rep Power: 14	Thanks guys, light weight flywheel would I need to change the stock clutch if it's in a good condition? and the flywheel would it make it loud?? that chutter sound? __________________ 2012 370z Sport 6MT baseline 283whp \| BBS CH-Rs \| Custom HKS single exit \| Evo-R \| Resonated TPs soon to be installed \| 4.08 Gears Coming soon

10-16-2012, 04:11 PM	#8 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	Maybe try to shed weight from the car? Every little bit helps... but it might cost you a bit (e.g., light weight seats, wheels, etc.). When you go in for the tune, have them adjust the fan settings so it kicks in earlier and adjust the throttle map so the ECU will allow you to open it up more especially down low. Reference the tuning subforum. [EDIT] IIRC, your might not be as daily drivable with this suggestion: shed weight down to 2800 lbs. Forged stripped down their stock Z to the bare essentials, and they managed to get it under 2800 lbs. or so and the car was highly competitive against the likes of Porsche on the track. Other than that... force induction is the way to go if you're going to spend more than $3k for N/A power. __________________ Last edited by DIGItonium; 10-16-2012 at 04:14 PM.

10-16-2012, 03:37 PM	#4 (permalink)
lemon-fresh Enthusiast Member Join Date: Mar 2012 Location: Calgary Age: 40 Posts: 471 Drives: 09 370z Rep Power: 13	pulley kit

10-16-2012, 04:01 PM	#5 (permalink)
LafitteZ Track Member Join Date: Jan 2011 Location: lafitte, la Posts: 698 Drives: 40th anniversary Rep Power: 15	Light clutch and flywheel asap

10-16-2012, 05:42 PM	#10 (permalink)
Navyboy916 Enthusiast Member Join Date: Jul 2011 Location: Hawaii Posts: 434 Drives: 2010 370z 7AT Rep Power: 14	I would ht mess with the redline. I say this cause at uprev I asked the same question and due to the cams profile no power is gain passed about 7200 rpm. So I just left it where it is. Just some inside knowledge.

10-16-2012, 06:59 PM	#13 (permalink)
Navyboy916 Enthusiast Member Join Date: Jul 2011 Location: Hawaii Posts: 434 Drives: 2010 370z 7AT Rep Power: 14	Not really just make sure ur a/f is right around 12.63 that's what uprev said is the optimal target area. Don't mess with the redline or the line pressure for a NA car there is no reason for these. Just make sure they get the A/F ratio correct.

10-16-2012, 07:09 PM	#15 (permalink)
Navyboy916 Enthusiast Member Join Date: Jul 2011 Location: Hawaii Posts: 434 Drives: 2010 370z 7AT Rep Power: 14	I have heard do many bad things about the pulleys. The motor is a great engine and messing with the pulleys can damage the motor. It's just my view I just wouldn't recommend it

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