Overkill Z Posted November 30, 2006 Author Share Posted November 30, 2006 That gear ratio on a NA L28 engine should make the car accelerate slower, but you'll be able to go to a higher speed in each gear. I'm wondering if you really put in a 3.36, or maybe you actually got a 3.90 or something. A 3.90 would definitely make the car faster. This might help others trying to figure out what gear ratio to get: http://www.geocities.com/z_design_studio/ well thats what they said it was...and its not a HUGE diff like i tihnk a 3.9 would be... Quote Link to comment Share on other sites More sharing options...
Overkill Z Posted November 30, 2006 Author Share Posted November 30, 2006 you are going faster than your speedo says..Put on tall tires and it gets worse. Good(better) on fuel economy... ya thats what i thought Quote Link to comment Share on other sites More sharing options...
NZeder Posted November 30, 2006 Share Posted November 30, 2006 well thats what they said it was...and its not a HUGE diff like i tihnk a 3.9 would be... ??? are you saying that you are expecting a 3.9 to be a bigger unit? This is not the case a R200 is a R200 no mater what ratio is in side. If you did not pull the back cover and see the number stamped into the crown wheel then how do you know 100% what you have? A 3.36 should have 37:11 on it. What is powering your zed? If a V8, turbo L28, V6 etc like Jon said then I would think this would be better suited to these engines with the right transmission. I am going the other way - pulling out a 3.9 to install a 4.11 as the 4.11 is better suited to my L28 with my Skyline R32 gearbox (same mod as installing the 240sx gearbox but the Skyline is shorter so no drive shaft mods as it is the same lenght as the stock B box). If your car still has a L6 engine then the 3.36 would have meant you can stay in any given gear longer = slower reving but higher speed vs a lower ratio (ie 4.11) Quote Link to comment Share on other sites More sharing options...
v80z Posted November 30, 2006 Share Posted November 30, 2006 I will post my source for the 3.364 once I get mine and make sure it is good. I would not want to recommend something or somebody prematurely. I will post my opinion after I get it installed and running. I am not setting up this car for out of the hole. There were 2 options to get the desired top end speed I was looking for for closed circuit events. Change from the 1:1 4 speed 4 th gear ratio to an OD unit or swap the 3.9 for a 3.364 both got me to 145 - 155 mph top end with the tire diameter I have. So I went the low dollar route as usual. I was glad to see this post. Mike321go Is yours a strictly street application with a lean towards dragging? Quote Link to comment Share on other sites More sharing options...
blueovalz Posted December 1, 2006 Share Posted December 1, 2006 This whole thread is kinda wierd. A higher gear ratio (smaller number) would (should) slow you down (acceleration) as it provides less torque to the rear wheels. Yeah, I know a turbo car can use that, but 95% of the time, the lower gear ratio (high number) will be quicker, but not ultimately faster. The only advantage of higher gears would be if you had a real torque monster in the low RPM range, like a diesel. Quote Link to comment Share on other sites More sharing options...
Overkill Z Posted December 1, 2006 Author Share Posted December 1, 2006 ??? are you saying that you are expecting a 3.9 to be a bigger unit? This is not the case a R200 is a R200 no mater what ratio is in side. If you did not pull the back cover and see the number stamped into the crown wheel then how do you know 100% what you have? A 3.36 should have 37:11 on it. What is powering your zed? If a V8, turbo L28, V6 etc like Jon said then I would think this would be better suited to these engines with the right transmission. I am going the other way - pulling out a 3.9 to install a 4.11 as the 4.11 is better suited to my L28 with my Skyline R32 gearbox (same mod as installing the 240sx gearbox but the Skyline is shorter so no drive shaft mods as it is the same lenght as the stock B box). If your car still has a L6 engine then the 3.36 would have meant you can stay in any given gear longer = slower reving but higher speed vs a lower ratio (ie 4.11) NONONONON i ment BIG gear ratios i know they have the same pumkin Quote Link to comment Share on other sites More sharing options...
Overkill Z Posted December 1, 2006 Author Share Posted December 1, 2006 This whole thread is kinda wierd. A higher gear ratio (smaller number) would (should) slow you down (acceleration) as it provides less torque to the rear wheels. Yeah, I know a turbo car can use that, but 95% of the time, the lower gear ratio (high number) will be quicker, but not ultimately faster. The only advantage of higher gears would be if you had a real torque monster in the low RPM range, like a diesel. you are right if u read what i said it made my car faster but its not as quick as it used to be...which is what the z needed! i found i was loosing to cars simply because i was shifting too many times...which would be great for tight courses like autocrossing..but driving it on the streets a lil longer gear ratio helped the car perform better...sure i dont get off the line as fast as i used to... but i have enough power i still rape evos and i posted in the thred what iv done to my motor too by all means its NOT stock Quote Link to comment Share on other sites More sharing options...
Guest Mike Posted December 1, 2006 Share Posted December 1, 2006 BOZ... I'm looking for higher gears because mine is a daily driver and sees a fair amount of highway speeds. There is a big difference between punching the throttle when at a dead stop compared to when you're already doing 30+ MPH. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted December 1, 2006 Share Posted December 1, 2006 Terry, I know that's what makes sense mathematically, but talk to Scottie or some of the other drag racers. They want tall gears with their turbos, and they go faster with them. I had a bit of a hard time coming to grips with the idea myself, but it's been shown enough times that I don't doubt what they say anymore. It might not be faster coming out of a corner at xxxx rpm, but for straight line acceleration, it is what it is. Quote Link to comment Share on other sites More sharing options...
Dtsnlvrs Posted December 1, 2006 Share Posted December 1, 2006 Could not have said it better myself. Quote Link to comment Share on other sites More sharing options...
blueovalz Posted December 1, 2006 Share Posted December 1, 2006 That's why I mentioned the turbo set-up. They create a lot of torque, and can take advantage of this. My 4:11 set-up lets me get to 60 MPH at the end of second gear. This is great if I want to out pull someone and not get to dangerous speeds on the street. If you're racing someone, and you need to get up to 130 MPH to beat them, then you deserve the win. Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted December 1, 2006 Share Posted December 1, 2006 Jmortenson: I have a correction for you. The 260Z only had the 3.36 R180 with the automatic tranny. That gear speed claculator said it came with the manual tranny but that is not right. The manual came with the 3.54 R180 rear end. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted December 1, 2006 Share Posted December 1, 2006 Nope, the 260Z 2+2 came with a 3.36 R200. I know, it's not on the list that you looked at, but it really did come in that car. Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted December 1, 2006 Share Posted December 1, 2006 Generally, a taller gear with a turbo motor lets you stay "in the boost" longer. The added load from the tall gear spools the turbo that much harder. This is the same reason that my turbo Z loves climbing hills. I have a 3.54 but would love to go taller. In first gear, the tach goes by so quickly that the turbo can't catch up. Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted December 1, 2006 Share Posted December 1, 2006 hmm.. There is a 260z 2+2 down at the local junkyard. I'll go down there sometime and look under it. Cygnusx1 is right about staying in boost longer: My dad's 944turbo loves climbing hills! it punches you into the seat like nothing else at 15psi... Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted December 1, 2006 Share Posted December 1, 2006 Good thread. Quote Link to comment Share on other sites More sharing options...
blueovalz Posted December 1, 2006 Share Posted December 1, 2006 It is, but the turbo applicability is lost on me being the origins of this string come from a N/A motor. I wonder, 2 shifts to pass through the quarter mile at the top of 3rd gear, does not seem to be a lot of shifting. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted December 1, 2006 Share Posted December 1, 2006 I think that was my fault. I was postulating how a 3.36 made his car faster. Quote Link to comment Share on other sites More sharing options...
mrcheeze36 Posted December 1, 2006 Share Posted December 1, 2006 Jmortenson: I have a correction for you. The 260Z only had the 3.36 R180 with the automatic tranny. That gear speed claculator said it came with the manual tranny but that is not right. The manual came with the 3.54 R180 rear end. 260 2+2s have 3:36 R200s. I pulled one a few months ago out of a manual 260Z 2+2. Quote Link to comment Share on other sites More sharing options...
Guest Mike Posted December 1, 2006 Share Posted December 1, 2006 Low gearing is for low torque/high RPM motors. High gearing is for high torque/low RPM motors. Right? Quote Link to comment Share on other sites More sharing options...
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