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350EVO..........3.9 Final drive

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Old Jan 31, 2004 | 09:41 AM
  #141  
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Originally posted by FLY BY Z
I have maintained from the beginning that I do not think this is a good mod for drag strip or a car that sees much highway. This will be no doubt good for the road course. But off the road course you are looking at more shifting, worse mileage, more wear and tear, etc. We will only know when it's tested. I think the Z has too short of gears already. I still want to swap out rears with an auto touring. Somebody help me!
I'm not sure I've ever bought a mod for improved mileage, reduced shifting or reduced wear and tear.

Anywho, on my baseline dyno, if you add ~250rpms @ 60mph, you'd net about ~10hp/5ft tq over a stock Z. When we go from a roll on the street, I win. Also, you won't have to shift more, just sooner. My favorite part about this mod is throttle up and throttle down. When you take your foot off the gas you will slow down nearly as fast as you accelerate. That's not everyone's cup of tea though.

As for the touring auto, maybe one of those guys who are parting out their Z's to make drag cars? I'm sure they will dump the factory diff. I think that guy was 7second350z who had the parted out Z. Not sure if it was touring though.
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Old Jan 31, 2004 | 09:43 AM
  #142  
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We'll see.

Last edited by FLY BY Z; Jan 31, 2004 at 10:10 AM.
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Old Jan 31, 2004 | 10:14 AM
  #143  
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Why does everyone want all that power, just to accelerate? I mean, cmon, no one want to use their Z for the tractor pull?

Pff, idiots. What are you all thinking!!

jk , i'm really bored

p.s. although the sarcasm in my post is pretty thick, the "jk" was inserted for the sarcastically challenged
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Old Jan 31, 2004 | 10:42 AM
  #144  
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Actually, I use my Z as a dedicated stump puller here on the farm. Thinkin' about takin' her down to the tractor pull Friday though.
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Old Jan 31, 2004 | 11:05 AM
  #145  
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Well from my past experiences GEARS have been the cheapest and single most noticeable mod you can do to a car(next to N2O of course).
Mt friend had a 94 Camaro Z28 back in 94,and all he did was 4:11's in the rear and man that thing flew!!Went from low to mid 14's stock to Really low 13's for around $800!!!Of course his spedo read 60 when he was doing like 40 and he tacked on 1 1/2 times more milage until he got the chip to correct it
But we wont have that problem cause our speed sensor is on our wheels instead of tranny..I was seriously looking into this mod as I dont drive my car everyday anymore,but my issue is TRACTION..Or should I say lack of!!I even smoke up my drag radials!!
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Old Jan 31, 2004 | 11:48 AM
  #146  
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this will tell you your speed, rpm and top speed in each gear, just type in your gears and tire sizes and then move your mouse over the graph. i found it a while ago but it's pretty cool to mess around with. don't know if you'll be able to click this but copy and paste if not. peace

http://www.geocities.com/z_design_st...ion_vr4_6.html
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Old Feb 1, 2004 | 06:08 PM
  #147  
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I may be wrong, but evo, aren't you using OEM parts anyway??

Frank


Originally posted by 2003z
you can get a 4.08 by swapping in a 90-96 non-turbo LSD. Its the same R200 diff.
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Old Feb 1, 2004 | 08:34 PM
  #148  
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Originally posted by zillinois
I'm not sure I've ever bought a mod for improved mileage, reduced shifting or reduced wear and tear.

Anywho, on my baseline dyno, if you add ~250rpms @ 60mph, you'd net about ~10hp/5ft tq over a stock Z. When we go from a roll on the street, I win. Also, you won't have to shift more, just sooner. My favorite part about this mod is throttle up and throttle down. When you take your foot off the gas you will slow down nearly as fast as you accelerate. That's not everyone's cup of tea though.

As for the touring auto, maybe one of those guys who are parting out their Z's to make drag cars? I'm sure they will dump the factory diff. I think that guy was 7second350z who had the parted out Z. Not sure if it was touring though.

from a roll you may win, but last i check most people race from a dead stop. YOU WILL LOSE!!!! While the other guy is moving you will be to busy smoking your tires. I agree this is a bad mod for an everyday driver. My opinion add a turbo or supercharger and throw some 3.08 in there that way you will be moving at 60mph when you have to shift from first to second. top speed will be more then your willing to go and get better gas milage. In the 1/4 while the 3.97 will be in 5th gear at the end you would only be in 3rd. less shifting means less chances to miss a gear or stall for a .1 of a second this car does not need 3.97 unless your on a road course. my .02
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Old Feb 1, 2004 | 08:56 PM
  #149  
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Originally posted by spazpilot
from a roll you may win, but last i check most people race from a dead stop. YOU WILL LOSE!!!! While the other guy is moving you will be to busy smoking your tires. I agree this is a bad mod for an everyday driver. My opinion add a turbo or supercharger and throw some 3.08 in there that way you will be moving at 60mph when you have to shift from first to second. top speed will be more then your willing to go and get better gas milage. In the 1/4 while the 3.97 will be in 5th gear at the end you would only be in 3rd. less shifting means less chances to miss a gear or stall for a .1 of a second this car does not need 3.97 unless your on a road course. my .02
Woo hoo! We got 4 cents total!
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Old Feb 1, 2004 | 09:06 PM
  #150  
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Originally posted by spazpilot
from a roll you may win, but last i check most people race from a dead stop. YOU WILL LOSE!!!! While the other guy is moving you will be to busy smoking your tires. I agree this is a bad mod for an everyday driver. My opinion add a turbo or supercharger and throw some 3.08 in there that way you will be moving at 60mph when you have to shift from first to second. top speed will be more then your willing to go and get better gas milage. In the 1/4 while the 3.97 will be in 5th gear at the end you would only be in 3rd. less shifting means less chances to miss a gear or stall for a .1 of a second this car does not need 3.97 unless your on a road course. my .02
Well, I totally agree with this. Wish someone would make it.
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Old Feb 1, 2004 | 09:36 PM
  #151  
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Fly by and spaz,

Your advice is very logical. However it's a great mod for people that aren't going for huge power, or FI. I don't have the funds right now, so I'm not in a position to really knwo what the hell i'm gnna do . Dwnshift said "1st and 2nd gear are very very useable with this modification" And after he brought it to the strip, he said his best time was a 13.8 and worst 14.1, and every run had wheel spin. He said the weather was bad, but a 13.8 isn't an improvement at all. I don't know waht kind of tires/rims he has, but if they AREN'T stock (meaing he has wider/stickier tires), that doesn't bode well for people who want this mod. If they are stock, then I guess there's room for improvement if people get a new tire setup.
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Old Feb 1, 2004 | 09:51 PM
  #152  
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Keep in mind that 900 dollars for a set of gears is not for those with a lack of funds either. Even if I wanted the gears I wouldn't get them due to the price especially when gears for a domestic are 200 bucks! But we WON'T get into that as we have been there before. Please don't argue my price statement as it will always go the same place - supply and demand. Not worth traveling the path another time. I KNOW. The wheelspin issues just fall into one of the negative side effects I have already mentioned. Even staying NA this isn't wise for the street. You simply HAVE to take into account the transmission ratios as well. Rear end gearing this low is for two applications:
1) 4 banger eco cars that do not have the torque to get up to speed.

2) Old muscle cars with 1st gear ratios in the 1.8 to 2.5 range and stock rear gears of 3.0-3.2 or so. Putting in 3.9 or 4.10 gears in these cars made a world of difference. Putting them in the Z which has a 3.79 1st gear is a crazy multiplication factor. 1st gear (and second, etc.) will be useless. I have mentioned this earlier in the thread.

Anyways, I would buy a lot of parts from 350EVO. It's a great store and I am about to order a TB from them later this week. The gears, however, are a roadtrack worthy mod and nothing more. We will just have to see when people start installing them and getting worse mileage on the way to the strip and then running slower or the same times. For 900 bucks plus install. Just IMO.
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Old Feb 1, 2004 | 10:50 PM
  #153  
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Originally posted by FLY BY Z
Keep in mind that 900 dollars for a set of gears is not for those with a lack of funds either. Even if I wanted the gears I wouldn't get them due to the price especially when gears for a domestic are 200 bucks! But we WON'T get into that as we have been there before. Please don't argue my price statement as it will always go the same place - supply and demand. Not worth traveling the path another time. I KNOW. The wheelspin issues just fall into one of the negative side effects I have already mentioned. Even staying NA this isn't wise for the street. You simply HAVE to take into account the transmission ratios as well. Rear end gearing this low is for two applications:
1) 4 banger eco cars that do not have the torque to get up to speed.

2) Old muscle cars with 1st gear ratios in the 1.8 to 2.5 range and stock rear gears of 3.0-3.2 or so. Putting in 3.9 or 4.10 gears in these cars made a world of difference. Putting them in the Z which has a 3.79 1st gear is a crazy multiplication factor. 1st gear (and second, etc.) will be useless. I have mentioned this earlier in the thread.

Anyways, I would buy a lot of parts from 350EVO. It's a great store and I am about to order a TB from them later this week. The gears, however, are a roadtrack worthy mod and nothing more. We will just have to see when people start installing them and getting worse mileage on the way to the strip and then running slower or the same times. For 900 bucks plus install. Just IMO.
Don't buy one if you don't like it. It's either going to help or not. If it doesn't, then take it out. If it does then great. Either way who really cares. $800 bucks is not that much to spend in a search for speed. You can barely get an exhaust for that and for what 8-10hp. Tires 800. I've seen people go through several sets of multi-1000 dollar rims. Many people here have spent 5000+ dollars only to gain 35hp. Someone has to try it first to see. You are not an early adopter of this product. Fine. This mod is not a big deal for me. I have installed these in my cars before so I feel comfortable with it. If it doesn't work, I will take it out and sell it to a track guy. I'm not sure what the big deal is?
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Old Feb 2, 2004 | 04:46 AM
  #154  
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It isn't a big deal but there is nothing wrong with seeing both sides to every story to make a more informed decision. Thanks for the advice on not to buy them, I almost went and put down the cash. My posts are simply facts about the reality of the product based on MY experience, gearing differences between cars,etc. I am not giving my opinion on this mod. My opinion on gearing is that it is a badass mod based on what it does. But it is not right for all cars. I am simply stating that I think that a higher rear gear ratio is what this car needs and would love to see that produced and I would probably buy it if it wasn't priced out of the solar system. Hopefully, if you really had your heart set on something, which obviously you do, you would not base your decision on the Internet posts of a stranger. This is for those who aren't fully aware of all of the effect of this mod. There are a lot of those people here. It also has to do with the fact that it is not a DIY mod. If things aren't installed perfectly you are going to have a rear end that wines or chatters. So it isn't like you can just toss her in and then say nevermind and sell it to some track guy. You have to pay for labor multiple times. This means something to some people. Maybe you are made of moolah but I'm not.

Last edited by FLY BY Z; Feb 2, 2004 at 04:49 AM.
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Old Feb 2, 2004 | 10:08 AM
  #155  
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Well said, flybyz. It seems every time theres any discussion about a product in any forum, someone will drop the stupid comment "if you don't like it, don't buy it."

I can't understand this phenomenon yet, nor the amazing lack of intelligence in the statement. This is a discussion forum. We discuss products, theories, review them, put them to the test, etc. and you're asking us to either buy it or shut up. How dumb.
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Old Feb 2, 2004 | 12:03 PM
  #156  
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I wouldn't argue on price...assuming gears aren't going to help much because of excessive wheelspin, 800 bucks is a rape =/ If they work, hey, that's another story. Do you think New tires could make a big difference? Or will there still be too muhc wheelspin to help the cause?
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Old Feb 2, 2004 | 01:44 PM
  #157  
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A good set of sticky tires are beneficial to any car whatever the mods. But that is a discussion for another forum.
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Old Feb 2, 2004 | 03:25 PM
  #158  
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wow!

Lets make this formal I say

"either buy it or shut up."


better?
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Old Feb 2, 2004 | 03:44 PM
  #159  
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Originally posted by 350z4steve
wow!

Lets make this formal I say

"either buy it or shut up."


better?
I'm afraid not. What are you saying? Please use appropriate punctuation. Thanks!
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Old Feb 2, 2004 | 03:47 PM
  #160  
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Sorry. I'm just growing frustrated by the daily email about this post. Then reading a post essentially slamming it (the product).

When I don't plan on buying a product or don't like it I don't post. We just do things different. But I am sorry for getting cross. I have unsubscribed to this thread so you can post in peace.

Last edited by zillinois; Feb 2, 2004 at 03:53 PM.
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