Mods vs Builds vs FI

Maduro · 05-28-2015, 10:09 PM

Quote:

Originally Posted by Chuck33079

OP, keep it NA and change out the gears in the rear end.

What about the rear gears ??? sounds interesting.

Maduro · 05-28-2015, 10:18 PM

Quote:

Originally Posted by DavidZ370

Much more expensive then the MT would cost is what im trying to say here, yeah sure you can go ahead and get a level 10 built AT -.-

Looked into that a level 10 cost 7k and I think that was with out the torque converter.

Duc_Z09 · 05-28-2015, 10:29 PM

Quote:

Originally Posted by Maduro

What about the rear gears ??? sounds interesting.

He's telling you to go steeper with the driveshaft/wheel rotation ratio. It's like choosing a lower gear on a bicycle... you can accelerate faster at the expense of some top end speed.

Longer explanation: When you divide the number of teeth in your ring gear (the one that turns your rear wheels) by the number of teeth in your pinion gear (the one attached to the driveshaft that comes directly from the transmission) you get a number like 2.73, 3.69, 3.73, 4.10, etc... What that means is that the driveshaft makes 2.73, 3.69, 3.73, or 4.10 full rotations per full rotation of your rear wheels. The higher the number, the more power per rotation you're going to get. But the tradeoff is that your gears will red-line a lot faster (you'll have to shift sooner) and your top speed will take a hit (if you care about 150+ mph). You'll also be running at higher RPM per any given speed in a given gear, so fuel economy will suffer too. With a 6-speed you'll probably just end up running 1 gear higher than you were previously though.

Maduro · 05-28-2015, 10:44 PM

Quote:

Originally Posted by brucelidat

How are you only at 7k with the add-ons? The kit itself is almost 7k. You shouldn't need too many add-ons to the Stillen kit unless

1. You're tracking hard in which you would need a lot of cooling.

2. You want much more power than the kit creates (410whp,300 wtrg) in whcih case you shouldn't be getting that kit to beign with since it doesn't do so well when people try to push more than that out of it.

Not including the mods she already has, plus I didn't include the whiteline sway bar and toe kit. oil and tranny coolers, Not looking to build a drag car / street monster - just something that will give me a little thrill when I do take it out. I would be satisfied with (410whp and 300wtrq)

brucelidat · 05-28-2015, 10:54 PM

Okay, it sounded like you were saying 7k for the kit plus the add-ons you mentioned like vented hood etc. Are you planning to self install and what about tuning? If you're fine with that level fo power and dont't plan to be tracking, the stock kit should work fine from what I have gathered on the forums. You should still def do a trans cooler though.

johnwiki · 05-28-2015, 11:33 PM

I did 4.08 and its a decent mod, good amount of acceleration increase. But you will cruise at higher revs. At 70 im at about 3000.

njobe89 · 05-29-2015, 07:51 AM

Quote:

Originally Posted by Duc_Z09

He's telling you to go steeper with the driveshaft/wheel rotation ratio. It's like choosing a lower gear on a bicycle... you can accelerate faster at the expense of some top end speed.

Longer explanation: When you divide the number of teeth in your ring gear (the one that turns your rear wheels) by the number of teeth in your pinion gear (the one attached to the driveshaft that comes directly from the transmission) you get a number like 2.73, 3.69, 3.73, 4.10, etc... What that means is that the driveshaft makes 2.73, 3.69, 3.73, or 4.10 full rotations per full rotation of your rear wheels. The higher the number, the more power per rotation you're going to get. But the tradeoff is that your gears will red-line a lot faster (you'll have to shift sooner) and your top speed will take a hit (if you care about 150+ mph). You'll also be running at higher RPM per any given speed in a given gear, so fuel economy will suffer too. With a 6-speed you'll probably just end up running 1 gear higher than you were previously though.

damn it you sir are informative. i actually feel like i learned something new today and it's only 7:50am lol.

Quote:

Originally Posted by johnwiki

I did 4.08 and its a decent mod, good amount of acceleration increase. But you will cruise at higher revs. At 70 im at about 3000.

does anyone know how much time it can shave off the 1/4 mile or anything like that.

forza370z · 05-29-2015, 10:39 AM

I would either spend big money on a twin turbo kit or stay NA and do the 4.08 final gear. SC kit doesn't give you a big of a change in power especially the torque. 300ish ib/ft doesn't give you much excitement for the money. You will spend $10k for it.

According to a guy had both Stillen SC kit and GTM TT kit, the SC kit gave him some gain over the bolt ons but nothing crazy. Now he switched to a TT kit, he is not steering the steering wheel anymore rather he needs to grab the steering wheel because of the acceleration.

But TT kit will cost you at least $15,000 to do it right. If you decide to stay in NA, I'd recommend 4.08 final gear. Just my .02.

BC416 · 05-29-2015, 11:19 AM

Quote:

Originally Posted by Maduro

Not including the mods she already has, plus I didn't include the whiteline sway bar and toe kit. oil and tranny coolers, Not looking to build a drag car / street monster - just something that will give me a little thrill when I do take it out. I would be satisfied with (410whp and 300wtrq)

You will need Forced Induction for those numbers. Maxed out with NA mods will get you about 340whp give or take.

jchammond · 05-31-2015, 09:18 AM

Yep; I'm seeing 341hp & 267tq on Z1motorsports page for their VQ37VHR 400HP Package... They are estimating 400HP @ the crank.

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Jsmith7861 · 05-31-2015, 09:44 AM

Quote:

Originally Posted by Duc_Z09

that "holy-crap-imma-die" feeling on acceleration

Lets be honest here, we all want that lol.

And a friend of mine did 4.08's, loves it. IMO, after the bolt ons and tune, its the last, best thing you can do to get more "oomph" out of your NA.

jchammond · 05-31-2015, 09:48 AM

Diff swap won't increase HP & TQ.. But you will fill more initial acceleration

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jchammond · 05-31-2015, 09:51 AM

Spray it

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jchammond · 05-31-2015, 10:07 AM

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Maduro · 06-01-2015, 09:29 PM

[QUOTE=jchammond;3214362]

How long will your engine last doing that ????????? It will end up costing you that !!!!! I would like to enjoy My Z a Bit more.

05-28-2015, 10:54 PM	#20 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 31	Okay, it sounded like you were saying 7k for the kit plus the add-ons you mentioned like vented hood etc. Are you planning to self install and what about tuning? If you're fine with that level fo power and dont't plan to be tracking, the stock kit should work fine from what I have gathered on the forums. You should still def do a trans cooler though. __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

05-28-2015, 11:33 PM	#21 (permalink)
johnwiki Base Member Join Date: Oct 2013 Location: California Age: 33 Posts: 66 Drives: 2011 Gun Metallic Z Rep Power: 12	I did 4.08 and its a decent mod, good amount of acceleration increase. But you will cruise at higher revs. At 70 im at about 3000. __________________ Mods: Z1 CAI, Fast Intentions HFC + Cat Back, 4.08 Gears + VLSD Swap, Southbend DxD Clutch+lightweight flywheel = 310 HP 285 ft/lbs

05-29-2015, 10:39 AM	#23 (permalink)
forza370z A True Z Fanatic Join Date: Oct 2011 Location: 403 Forbidden Posts: 2,512 Drives: 2009 NISMO 370Z Rep Power: 19	I would either spend big money on a twin turbo kit or stay NA and do the 4.08 final gear. SC kit doesn't give you a big of a change in power especially the torque. 300ish ib/ft doesn't give you much excitement for the money. You will spend $10k for it. According to a guy had both Stillen SC kit and GTM TT kit, the SC kit gave him some gain over the bolt ons but nothing crazy. Now he switched to a TT kit, he is not steering the steering wheel anymore rather he needs to grab the steering wheel because of the acceleration. But TT kit will cost you at least $15,000 to do it right. If you decide to stay in NA, I'd recommend 4.08 final gear. Just my .02. __________________ 09 PW 370z Nismo \| K&N Drop Ins \| HKS Hi Power \| Berk HFCs \| Work Meister S1 3P \| Project Kics R40 Neo Chrome Lug Nuts \| KW V1 \| SPC rear camber arms/toe bolts \| Southbend Stage 3 daily clutch \| Southband 19Ib Steel Flywheel \| ZSpeed CSC

05-31-2015, 09:18 AM	#25 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684395	Yep; I'm seeing 341hp & 267tq on Z1motorsports page for their VQ37VHR 400HP Package... They are estimating 400HP @ the crank. Sent from my iPhone using Tapatalk __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

05-31-2015, 09:48 AM	#27 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684395	Diff swap won't increase HP & TQ.. But you will fill more initial acceleration Sent from my iPhone using Tapatalk __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

05-31-2015, 09:51 AM	#28 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684395	Spray it Sent from my iPhone using Tapatalk __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

05-31-2015, 10:07 AM	#29 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684395	Sent from my iPhone using Tapatalk __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

06-01-2015, 09:29 PM	#30 (permalink)
Maduro Base Member Join Date: Mar 2012 Location: New York Posts: 94 Drives: Nissan 2013 370z Rep Power: 13	[QUOTE=jchammond;3214362] How long will your engine last doing that ????????? It will end up costing you that !!!!! I would like to enjoy My Z a Bit more.

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