3.3 vs 3.69 Final Drive with FI setup

DEpointfive0 · 08-14-2014, 12:39 AM

Quote:

Originally Posted by phunk

I did the 3.3 in my 350z and it was worth it. I plan to with my 370.

dang, I didnt know the 370z dropped cruise with the 3.3. Hmm, I will have to ponder why the cruise control cares about the final drive. I figured it would just be a wheel speed based thing, and it would adjust throttle to achieve the target wheel speed. Anyone clear on why we lose cruise? I am drawing a blank at the moment.

No idea... Didn't a vendor fix it when the auto guys went from 3.357 to 4.08? Could it be the same fix?

And using cruise control in 6th vs 5th shouldn't save THAT much gas if you're actually cruising. And the gears will be longer, soupy might be close to the same revs in 5th with the auto diff vs 6th with the MT diff

1slow370 · 08-14-2014, 01:50 AM

Quote:

Originally Posted by Cell

Anyone know if uprev can do it?

It can not

roplusbee · 08-14-2014, 02:58 AM

This may sound weak, but I am not so sure I can live without cruise control. I am alreaady living without window washer capabilities and that is hard. If I loose SRM, big WHOOP. If I loose Cruise Control, "Damn Son, where'd you find this?!?!?" Would make the drive from TX to MD kinda sucky!

Diabel · 08-14-2014, 06:17 AM

But we still don't have the hard data only feelings and opinions, is here someone who measured it? I mean for 1/4 mile time before and after the final drive swap ? Or I have to do it as a first one ?

esfourteen · 08-14-2014, 08:15 AM

Quote:

Originally Posted by Diabel

But we still don't have the hard data only feelings and opinions, is here someone who measured it? I mean for 1/4 mile time before and after the final drive swap ? Or I have to do it as a first one ?

MrSqueeze is running 3.3, I dont think hes been down the 1/4 with it yet though and his car is currently down while switching to the BP kit

R3drckt09 · 08-14-2014, 10:00 AM

I really don't know why you only loose cruise in 6th, Squeeze did warn be about it but I figured oh well. I wonder if in my case it's cause the 350Z was a 5 speed auto and I have a 6 speed? Idk wild guess

Nixlimited · 08-14-2014, 10:35 AM

Quote:

Originally Posted by 1slow370

Just an FYI the factory MT rear end ratio that is in your car is already 3.69

D'oh. Sorry, there are two other ratios that I have heard of, but I couldn't remember what they were exactly.

Diabel · 08-14-2014, 10:42 AM

Quote:

Originally Posted by esfourteen

MrSqueeze is running 3.3, I dont think hes been down the 1/4 with it yet though and his car is currently down while switching to the BP kit

Then maybe he will advise something...

Z eliminator · 08-14-2014, 11:10 AM

I feel that the car will slow down in the 1/4 mile with the gear change.
Z

Diabel · 08-18-2014, 01:28 PM

Quote:

Originally Posted by Z eliminator

I feel that the car will slow down in the 1/4 mile with the gear change.
Z

Some say very much different - more grip and lower 1/4 time...please remember we are talking about FI car.

phunk · 08-18-2014, 01:41 PM

More grip through reduction of power applied to the pavement. The car will loose some acceleration in each gear. With stock gearing, the placement of the 5th gear change is inconvenient and it's really difficult to consistently get a clean 0-60mph part of the run. So quicker 1/4 mile times from stretching the gear out is more of distance specific side effect... Making it really hard to say precisely how much quicker it might make your exact car with you driving it. Because given the right tire, alignment, suspension setup, and driver... The stock gearing is quicker.

Tempestz · 08-18-2014, 01:49 PM

Quote:

Originally Posted by Diabel

Some say very much different - more grip and lower 1/4 time...please remember we are talking about FI car.

Yup, Turbo you want to stay in boost as long as possible, 3.3 will help with that. S/C you will want to reach redline as fast as possible, so lower will help.

Wish I had a manual guy in Hawaii who wanted to Trade. I'd love a 3.69 on my 7at

08-14-2014, 02:58 AM	#18 (permalink)
roplusbee A True Z Fanatic Join Date: Dec 2009 Location: Killeen, TX Posts: 2,360 Drives: 2007 350Z NISMO Rep Power: 23	This may sound weak, but I am not so sure I can live without cruise control. I am alreaady living without window washer capabilities and that is hard. If I loose SRM, big WHOOP. If I loose Cruise Control, "Damn Son, where'd you find this?!?!?" Would make the drive from TX to MD kinda sucky! __________________ 2007 350Z NISMO #0618: Zerolift \| UPREV \| F.I. \| Greddy \| Competition Clutch \| Injector Dynamics \| Aeromotive \| Pioneer \| JL

08-14-2014, 11:10 AM	#24 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	I feel that the car will slow down in the 1/4 mile with the gear change. Z __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

08-18-2014, 01:41 PM	#26 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	More grip through reduction of power applied to the pavement. The car will loose some acceleration in each gear. With stock gearing, the placement of the 5th gear change is inconvenient and it's really difficult to consistently get a clean 0-60mph part of the run. So quicker 1/4 mile times from stretching the gear out is more of distance specific side effect... Making it really hard to say precisely how much quicker it might make your exact car with you driving it. Because given the right tire, alignment, suspension setup, and driver... The stock gearing is quicker. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

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08-14-2014, 06:17 AM	#19 (permalink)
Diabel Base Member Join Date: Sep 2012 Location: Bensenville IL Posts: 103 Drives: 370z Rep Power: 13	But we still don't have the hard data only feelings and opinions, is here someone who measured it? I mean for 1/4 mile time before and after the final drive swap ? Or I have to do it as a first one ?

08-14-2014, 10:00 AM	#21 (permalink)
R3drckt09 Base Member Join Date: Jul 2013 Location: Texas Posts: 145 Drives: 09 Nissan 370Z Base Rep Power: 12	I really don't know why you only loose cruise in 6th, Squeeze did warn be about it but I figured oh well. I wonder if in my case it's cause the 350Z was a 5 speed auto and I have a 6 speed? Idk wild guess