3.636 or 3.9 R&P?
I am undecided right now, I went for a 7 hour drive yesterday and man does the 5 speed suck with 4.10's. I was driving 120km/h and im at 4000rpm...does that ever go through gas pretty quick. So I seen the 3.636 ring and pinion on miata roadster website, price seems ok I guess, and it comes with everything necessary to do the swap. Whats up with the distance piece? Is that needed? Its impossible to find a 3.636 R&P I have searched everywhere! I found some 3.9 R&P but then I have so source a speedogear and its to much bullshit for me. What do you think would be better a 3.636 or 3.9 im running 20lbs of boost right now in the next month or so I will be at 30lbs. I also do use the highway alot. Would the 3.9 cut it for me or should i just go with the 3.636? Thanks, Mike.
|
3.9 would work for ya!
and all you gotta do is find a 3.9 torsen compleate unit out of a NB excluding MSMs and 03s. |
I found a couple on car-part.com...all in the states though im going to give them a call tuesday and see if it can be shipped. Im assuming i dont need no distance piece with a 3.9 and i can just get the speedogear at a mazda dealership.
|
Originally Posted by stranges12712
(Post 577089)
I found a couple on car-part.com...all in the states though im going to give them a call tuesday and see if it can be shipped. Im assuming i dont need no distance piece with a 3.9 and i can just get the speedogear at a mazda dealership.
That's what I drive (with a 3.63 gearset I bought) and it has been the only way I've been satisfied with the rpms at cruising speeds on the highway. |
Originally Posted by Rafa
(Post 577090)
Won Ton is going to think I have something against him (I don't). If I were you, I'd look for a 6 speed transmission.
That's what I drive (with a 3.63 gearset I bought) and it has been the only way I've been satisfied with the rpms at cruising speeds on the highway. |
Originally Posted by Rafa
(Post 577090)
If I were you, I'd look for a 6 speed transmission.
The guy is looking for a way to lower RPM on the freeway, right? Assuming the same R&P ratio for both (be it 3.636 or 3.9) a six-speed will result in a higher cruising RPM than a five-speed. |
Originally Posted by Joe Perez
(Post 577102)
I'm confused.
The guy is looking for a way to lower RPM on the freeway, right? Assuming the same R&P ratio for both (be it 3.636 or 3.9) a six-speed will result in a higher cruising RPM than a five-speed. Go 3.63's, help a bit with traction down low and much lower RPM's on the highway. I got a set myself that I'll be installing shortly now that schools out. |
Originally Posted by mikeflys1
(Post 577104)
This.
Go 3.63's, help a bit with traction down low and much lower RPM's on the highway. I got a set myself that I'll be installing shortly now that schools out. +1. This has been my experience so far. |
Originally Posted by stranges12712
(Post 577100)
I have been looking they want 900$ Canadian over here for one, and thats if you can source it. I found one its about 200km from me. But first i want to do my diff ratio i just bought the torsen 4.10s last year i should have went with the 3.9s. But i will be getting a 6 speed once i grenade my 5 speed.
I blew the 5 speed later on and had to change to a 6 speed. I just kept the same diff. |
Originally Posted by Rafa
(Post 577110)
I understand. If you're going to keep your 5 speed for the time being; why not install the 3.63 gearset? It made a noticeable difference in my car when I was using it.
I blew the 5 speed later on and had to change to a 6 speed. I just kept the same diff. |
3.63 is worth the money if you street the car. I could use a little closer gearing on the track (250whp) but its worth it to cruise at 80mph at low rpm.
|
20lbs of boost on a 2871 and your still using a 5-speed? 3.6 + a 6-speed would be a good street option.
|
Originally Posted by Rafa
(Post 577090)
Won Ton is going to think I have something against him (I don't). If I were you, I'd look for a 6 speed transmission.
That's what I drive (with a 3.63 gearset I bought) and it has been the only way I've been satisfied with the rpms at cruising speeds on the highway.
Originally Posted by Joe Perez
(Post 577102)
I'm confused.
The guy is looking for a way to lower RPM on the freeway, right? Assuming the same R&P ratio for both (be it 3.636 or 3.9) a six-speed will result in a higher cruising RPM than a five-speed.
Originally Posted by thesnowboarder
(Post 577126)
20lbs of boost on a 2871 and your still using a 5-speed? 3.6 + a 6-speed would be a good street option.
|
Originally Posted by WonTon
(Post 577130)
i know ya dont buddy.....i was just saying grab a 3.9 unit cause its already together over buying a torsen, then buying the gears and then paying sombody to install em.
I totally agree with you. |
Originally Posted by hustler
(Post 577119)
3.63 is worth the money if you street the car. I could use a little closer gearing on the track (250whp) but its worth it to cruise at 80mph at low rpm.
With a 3.90: 1st 2nd 3rd 4th 5th Ratio: 3.14 1.89 1.33 1.00 0.81 RPM 1st 2nd 3rd 4th 5th 750 4 7 10 13 16 1000 6 9 13 18 22 1250 7 12 16 22 27 1500 8 14 20 26 32 1750 10 16 23 31 38 2000 11 19 26 35 43 2250 13 21 30 39 49 2500 14 23 33 44 54 2750 15 26 36 48 59 3000 17 28 40 53 65 3250 18 30 43 57 70 3500 20 33 46 61 75 3750 21 35 49 66 81 4000 22 37 53 70 86 4250 24 40 56 75 92 4500 25 42 59 79 97 4750 27 44 63 83 102 5000 28 46 66 88 108 5250 29 49 69 92 113 5500 31 51 73 97 119 5750 32 53 76 101 124 6000 34 56 79 105 129 6250 35 58 82 110 135 6500 36 60 86 114 140 6750 38 63 89 118 146 7000 39 65 92 123 151 With a 3.636: 1st 2nd 3rd 4th 5th Ratio: 3.14 1.89 1.33 1.00 0.81 RPM 1st 2nd 3rd 4th 5th 750 5 7 11 14 17 1000 6 10 14 19 23 1250 8 12 18 24 29 1500 9 15 21 28 35 1750 11 17 25 33 40 2000 12 20 28 38 46 2250 14 22 32 42 52 2500 15 25 35 47 58 2750 17 27 39 52 64 3000 18 30 42 56 69 3250 20 32 46 61 75 3500 21 35 50 66 81 3750 23 37 53 71 87 4000 24 40 57 75 92 4250 26 42 60 80 98 4500 27 45 64 85 104 4750 29 47 67 89 110 5000 30 50 71 94 116 5250 32 52 74 99 121 5500 33 55 78 104 127 5750 35 57 81 108 133 6000 36 60 85 113 139 6250 38 62 88 118 145 6500 39 65 92 122 150 6750 41 67 96 127 156 7000 42 70 99 132 162 |
um i know your not doing 150 or 160 mph in 4th gear man the chart is off on something forsure
|
Originally Posted by Joe Perez
(Post 577102)
I'm confused.
The guy is looking for a way to lower RPM on the freeway, right? Assuming the same R&P ratio for both (be it 3.636 or 3.9) a six-speed will result in a higher cruising RPM than a five-speed. |
Originally Posted by thesnowboarder
(Post 577126)
20lbs of boost on a 2871 and your still using a 5-speed? 3.6 + a 6-speed would be a good street option.
|
Originally Posted by WonTon
(Post 577130)
i know ya dont buddy.....i was just saying grab a 3.9 unit cause its already together over buying a torsen, then buying the gears and then paying sombody to install em.
its all in the final drive gear. when the the 6-speed, 3.9 combo i had was running fine, i loved it. so much better than 5-speed + 4.10(1st gear seemed a lil shorter) id love to have a 3.63 R&P that would be teh sex. |
get the 3.63 and be done with it. assembly is the only point agianst getting it at your powerlvl and you have effectively made that a moot point.
|
All times are GMT -4. The time now is 10:28 AM. |
© 2024 MH Sub I, LLC dba Internet Brands