HR Z - Bolt-on options?
02-28-2014, 07:20 PM
#42
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mine doesnt say it anywhere on it... but l really dont care.. not like you really see it anywhere. but on another note, my muffler cracked mostly from dragging speed bumps in my apts, i emailed tony and even though i told him i drug it and thinned it out, he said he would replace it at no cost to me under warranty..., genuine stand up guy
03-01-2014, 08:58 AM
#45
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Only inconvenience I had with 4.08 is the higher RPM at cruising speed. It sits at around 3000 RPM for 70mph. What's so bad about it for DD? 
All the extra drone from test pipe/ exhaust is much worse for DD.
All the extra drone from test pipe/ exhaust is much worse for DD.
03-03-2014, 05:22 AM
#48
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Yes it is worth it. I don't know where that guy above got his info from. It makes no sense while it would only improve first gear. It increases acceleration in every gear by around 15% if I remember correct. Research for yourself and don't listen to false info. Read through that thread.
https://my350z.com/forum/engine-and-...installed.html
https://my350z.com/forum/engine-and-...installed.html
Last edited by The_Assassin; 03-03-2014 at 05:33 AM.
03-03-2014, 07:23 AM
#49
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As far as DD with 4.08 goes, it's much easier to start in 2nd in traffic. You don't have to slip the clutch nearly as much. On highway, you never have to downshift to 5th to pass. You're already sitting around 3000RPM in 6th gear at cruising speed, just have to put the foot down and go
edit: I have PPE longtube header, full exhaust, intake, uprev tuned. If I have to keep just one power mod, it will be 4.083. It did more than all those plumbing combined.
Last edited by secwind; 03-03-2014 at 07:28 AM.
03-03-2014, 07:48 AM
#50
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1st gear "only" would be a waste of time and $$; like mentioned above, "all" gears are effected; ask most any of the guys on the site who have gone 3.9/4.08's and ask if they did or didn't get a big smile on their faces as they were trying out the new setup for the first time.
Last edited by BigBlue; 03-03-2014 at 10:32 AM.
03-04-2014, 03:04 PM
#52
Let me clarify: all gears are indeed affected by getting 4.08s, but do not forget that you are also shortening the length of each gear in the process! That is an important consideration which often gets forgotten when changing out your final drive.
Because each gear is now shorter, that means you have to shift to the next gear earlier which has a higher effective ratio than the gear before it, whereas the stock geared car can stay in the lower gear longer and benefit from the shorter effective ratio of that lower gear. If you are racing from a roll, it ends up being a wash because the short geared car will be faster at some points (until it has to shift into a higher gear), at which point the stock geared car will pull a little more. It kind of goes back and forth.
With that said, there is no doubt in my mind that 4.08s "feel" faster and make the car a lot more fun to drive. Part of that feeling faster is because the gears are shorter and you have to shift more often. But don't kid yourself...from a roll, they are not actually faster than a stock geared car. You can't get around the laws of physics.
Because each gear is now shorter, that means you have to shift to the next gear earlier which has a higher effective ratio than the gear before it, whereas the stock geared car can stay in the lower gear longer and benefit from the shorter effective ratio of that lower gear. If you are racing from a roll, it ends up being a wash because the short geared car will be faster at some points (until it has to shift into a higher gear), at which point the stock geared car will pull a little more. It kind of goes back and forth.
With that said, there is no doubt in my mind that 4.08s "feel" faster and make the car a lot more fun to drive. Part of that feeling faster is because the gears are shorter and you have to shift more often. But don't kid yourself...from a roll, they are not actually faster than a stock geared car. You can't get around the laws of physics.
Last edited by PeterSellers; 03-04-2014 at 03:05 PM.
03-04-2014, 03:21 PM
#53
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^stock gearing gets the mpg up to sell cars. Most any car or truck could be tuned/geared for better performance, whp, tq from the factory, but mpg on the little window sticker could be a turn off to potential buyers who want better mpg. I doubt that the Z33 would have a fd gearing of 3.5 "if" it didn't hurt gas mileage otherwise. The tuning would also be different, giving more whp/tq, but more performance drops that magical mpg # and sales are affected. I say go ahead with the more agressive fd.
03-05-2014, 08:24 AM
#54
^stock gearing gets the mpg up to sell cars. Most any car or truck could be tuned/geared for better performance, whp, tq from the factory, but mpg on the little window sticker could be a turn off to potential buyers who want better mpg. I doubt that the Z33 would have a fd gearing of 3.5 "if" it didn't hurt gas mileage otherwise. The tuning would also be different, giving more whp/tq, but more performance drops that magical mpg # and sales are affected. I say go ahead with the more agressive fd.
If the Z was my weekend car and I was staying N/A, I would definitely get the gears. Since the Z was my daily I thought the stock gearing was a better choice. That's a personal opinion though.
Still, I wanted to clear up the misconception about 4.08s being "15% faster in all gears" because that implies that the car will always accelerate faster than a stock geared car, when that is quite far from the truth.
03-05-2014, 11:47 AM
#55
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I agree with this for the most part, although shorter gearing is also worse on the freeway simply because you are cruising at a higher rpm, which negatively impacts drivability/comfort level.
If the Z was my weekend car and I was staying N/A, I would definitely get the gears. Since the Z was my daily I thought the stock gearing was a better choice. That's a personal opinion though.
Still, I wanted to clear up the misconception about 4.08s being "15% faster in all gears" because that implies that the car will always accelerate faster than a stock geared car, when that is quite far from the truth.
If the Z was my weekend car and I was staying N/A, I would definitely get the gears. Since the Z was my daily I thought the stock gearing was a better choice. That's a personal opinion though.
Still, I wanted to clear up the misconception about 4.08s being "15% faster in all gears" because that implies that the car will always accelerate faster than a stock geared car, when that is quite far from the truth.
Last edited by Lonestarr350; 03-05-2014 at 11:48 AM.
03-05-2014, 12:20 PM
#56
I think part of it was cost cutting on nissan's behalf when moving from the DE to the rev-up, and then finally the HR. The FD stayed the same while the max RPMs climbed. If the original 350Z was released with a 7500rpm redline, there's a very good chance it would have had a higher FD. An HR reaches the same or higher speeds in 3rd gear (105ish) than many other sporty cars with way more power -- e9x m3? 105ish. c5 z06? 103ish.
Usually the car that makes less power has the shorter gears to make up for it.
Usually the car that makes less power has the shorter gears to make up for it.
03-06-2014, 08:57 AM
#57
I am against the gearing change but thats just preference. what the car really needs even at this power level is a real limited slip diff like a Quaife.
03-11-2014, 03:40 PM
#58
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304hp! https://i.imgur.com/LD76IlB.jpg
Mods:
Injen Long Tube Intakes
CNT Resonated Test pipes
Invidia Gemini Exhaust
93 Octane btw
How is my car compared to others.
Mods:
Injen Long Tube Intakes
CNT Resonated Test pipes
Invidia Gemini Exhaust
93 Octane btw
How is my car compared to others.
03-11-2014, 04:25 PM
#59
Registered User
304hp! https://i.imgur.com/LD76IlB.jpg
Mods:
Injen Long Tube Intakes
CNT Resonated Test pipes
Invidia Gemini Exhaust
93 Octane btw
How is my car compared to others.
Mods:
Injen Long Tube Intakes
CNT Resonated Test pipes
Invidia Gemini Exhaust
93 Octane btw
How is my car compared to others.
Much faster. Stock my numbers were 273 whp and 244 wtq. You got 304 whp and 272 wtq. Is that with a tune ?