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I think I'm going with a 3.91 lsd. If it's to much of a difference (don't think it will be, sounds like it'll make the gears about as short as my e30's were, which I would love to have) I'll probably swap it out in a few more months for a 3.73 or 3.64, but I don't really mind the gas mileage decrease (I used to be concerned about gas mileage, but meh, life's too short) and like I said I don't mind shorter gears.
okay man...your right, a .064 increase must be very noticable. Thats a whopping 192 rpm increase at 3000 rpms. To take it a step farther its 320 rpms at 5k. Your tha man.
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Originally Posted by bahnstormer
Quote:
Originally Posted by 632 Regal
regal, what are u talking about? we are talking about drivability and feel
not how many rpms it goes up.
u have not a clue as to what u're saying and u're being an ass about it.
thats not the issue, that small of an increase would not make enough difference to feel. RPMs is exactly the thing were talking about too because thats the only change being made. I dont know what im talking about??? LMAO.
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Originally Posted by bahnstormer
Maybe it is because we are making the changes on cars with manual transmissions, as the difference is substantial when driving around town.Quote:
Originally Posted by 632 Regal
Bahn, maybe we should swap in some torque convertors for a more involving drive?
But remember its not about the rpm inrease - it's about the fact that the engine doesn't have to use as much power-per-rpm to turn the wheels, so more is free'd up.Quote:
Originally Posted by 632 Regal
3.64 WILL be a difference, especially in a 5 speed. Look at this
Getrag 260/6
1st 3.83
2nd 2.2
3rd 1.4
4th 1.0
5th 0.81
Rev 3.46
That's the transmission ratio - are you saying that the fourth to fifth ratio difference won't do anything? Becuase that .19 ratio difference DOES make a difference, as does the .18 difference between the 3.46 and 3.64...
Quote:
Originally Posted by Martin in Bellevue
actually i did a diff swap in my sisters 90 535ia and went from a 3.91 to a 4.27 (iirc) and that made a difference for sure...however i wouldn't say it
is as noticeable as it is on my car.....perhaps b/c i don't drive her car enough...
a torque convertor + a flux capacitator should make our cars fly
1st 3.83 = 4.075
2nd 2.2 = 2.34
3rd 1.4 = 1.49
4th 1.0 = 1.064
5th 0.81 = 0.86
Rev 3.46 = 3.64
your thinking is not correct, the upgrade is .064 not .19, unless I really dont know what I'm talking about divide 3.64 by 3.46...I appologize if not correct here but I think I am.
I think Im real confused now.
The way I put it is the difference between each ratio by subtracting, not find a percentage. Either way it doesn't matter - when a bunch of people say it makes a difference - and they actually DID the mod, I have to believe them ;)Quote:
Originally Posted by 632 Regal
I did a 3.46 LSD - 3.91 LSD swap, BIG MISTAKE, HUGE.......way tooooooo short. a 3.64 or 3.73 is the way to go.Quote:
Originally Posted by epj3