differential swap or not

kkiepvvessau · 12-18-2005, 04:38 AM

Quote:

Originally Posted by SKILMATIC

Well your diff has nothing to do with top end capabilites. That would be the type of gears you have in your tranny. All the diff does is make wheels turn thats all. It takes whatever torque/power the tranny makes via the engine and is transfers that power to the ground. So your whole concpet there is a little misguiding IMO.

And I dont know how the IS300 is a different setup cause its the same motor and tranny as the supra it just has a little better technology than a 93-97 vehicle. If anything the IS300 should be better cause its like almost 10yrs newer therefore newer and better technology is involved in that car. Is this making sense?

due, you know what you talking about?

SKILMATIC · 12-18-2005, 08:17 PM

Quote:

Originally Posted by kkiepvvessau

due, you know what you talking about?

well sometimes i do sometimes i dont. However, I am going to be fair about this. I am going to tell you the same thing I tell everyone who doesnt agree with me.

Please if you can refute anything I say by posting a link with facts to back your side up then I will gladly admit I was wrong. I did this to another guy on the supra or bmw thread and I have yet to hear from him. So now the balls in your court.

kkiepvvessau · 12-20-2005, 02:44 AM

the differential does more than just turn the wheels. people spent thousand dollar swap differential to get the car faster. read this and you might understand better http://www.z1motorsports.com/PDFs/TT...earendswap.pdf . i'm not a smart guy . i just wants to share about stuff that i know.

SupraMan1784 · 12-20-2005, 02:44 PM

well he was pretty much right...though the top end part i did not know, but wut he said about putting power to the ground is correct, since thats what a diff does and allows the wheels to turn, the diff just makes it easier to transfer the power to the wheels without losing it all through lost traction

SKILMATIC · 12-20-2005, 09:47 PM

Quote:

Originally Posted by kkiepvvessau

the differential does more than just turn the wheels. people spent thousand dollar swap differential to get the car faster. read this and you might understand better http://www.z1motorsports.com/PDFs/TT...earendswap.pdf . i'm not a smart guy . i just wants to share about stuff that i know.

Well your talking about converting a single wheel turning diff to a LSD(aka limited slip diff) or a ATB(aka automatic torque biased diff). These diffs are also bullet proof none the less. Your stock gears are much more brittle than a forged diff. So when you get a cusco, or a quaife you are able to downshift at higher rpm's much more smoothly and effortlessly. And they make both wheels turn at the same rate. Stock diffs do not do this. This is why they cost so much. You are paying for precision machining and anytime you deal with that your talking some coin. I payed all together with instalation and new spider gear about 1500 for my quaife diff. And it was money well spent.

So again, the transmission transfers power(hence the terminology trans-mission) its mission is to transfer power. And the differential just takes that power and turns the wheels. I guess you could say its transfering power from the tranny to the ground but the tranny doesnt create power it just transfers it. Now the correct analyzation would be that the diff distributes(not transfers) the power to the wheels. I hope that helps a little.

SupraMan1784 · 12-21-2005, 02:55 PM

distributes...transfers....same idea...but yea....putting in a quality diff is not gonna be cheap

SKILMATIC · 12-21-2005, 08:05 PM

Quote:

Originally Posted by SupraMan1784

distributes...transfers....same idea...but yea....putting in a quality diff is not gonna be cheap

Actually they mean completely 2 different things. So they arent the same. But I understand why someone would be confused because they are somewhat similar.

Newschooler · 12-24-2005, 03:45 PM

Hell, I'm a brand newbie on this board and I plan on buying a supra TT in a couple of years.

However I am not a newbie in mechanics so I couldn't resist to add some information here.
What kkiepvvessau wants to say, is that the differential does more than just turning the wheels. It also amplifies power just like a gear.

So lets say your engine devellop 200lb of torque at the flywheel. 200lb of torque isn't really alot to move a 3000lb and + car. Thats when the tranny and differential comes into play.

Lets say your first gear got a ratio of 3.0 and your differential a ratio of 3.1
The power your wheels will put on the ground will be: 3.0*3.1*200=1860lb/tq

Now that more likely to move your car. If you swap a lower gear ratio diff, you'll get: 3.0*3.7*200=2220lb/tq. Thats 360lb of torque to the wheels more right there just with that new differential. Not bad huh.

Anyway, I dunno if you all were aware of that, don't want to sound like a smart ass.

12-20-2005, 02:44 AM	#3
kkiepvvessau Stock Join Date: Nov 2005 Posts: 21	the differential does more than just turn the wheels. people spent thousand dollar swap differential to get the car faster. read this and you might understand better http://www.z1motorsports.com/PDFs/TT...earendswap.pdf . i'm not a smart guy . i just wants to share about stuff that i know. __________________ 95 Supra SE

12-20-2005, 02:44 PM	#4
SupraMan1784 SP58GT Join Date: Jun 2005 Location: Dirty Jerz Posts: 691	well he was pretty much right...though the top end part i did not know, but wut he said about putting power to the ground is correct, since thats what a diff does and allows the wheels to turn, the diff just makes it easier to transfer the power to the wheels without losing it all through lost traction __________________ Now: Saving for an MKIV Broken Rides: (Sold) 91 supra turbo 5speed with a 1jzgte motor 421whp 400(399) ft*lbs of torque on tap @ 15 psi "Always outnumbered, never outgunned."

12-21-2005, 02:55 PM	#6
SupraMan1784 SP58GT Join Date: Jun 2005 Location: Dirty Jerz Posts: 691	distributes...transfers....same idea...but yea....putting in a quality diff is not gonna be cheap __________________ Now: Saving for an MKIV Broken Rides: (Sold) 91 supra turbo 5speed with a 1jzgte motor 421whp 400(399) ft*lbs of torque on tap @ 15 psi "Always outnumbered, never outgunned."

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12-24-2005, 03:45 PM	#8
Newschooler Stock Join Date: Dec 2005 Posts: 3	Hell, I'm a brand newbie on this board and I plan on buying a supra TT in a couple of years. However I am not a newbie in mechanics so I couldn't resist to add some information here. What kkiepvvessau wants to say, is that the differential does more than just turning the wheels. It also amplifies power just like a gear. So lets say your engine devellop 200lb of torque at the flywheel. 200lb of torque isn't really alot to move a 3000lb and + car. Thats when the tranny and differential comes into play. Lets say your first gear got a ratio of 3.0 and your differential a ratio of 3.1 The power your wheels will put on the ground will be: 3.03.1200=1860lb/tq Now that more likely to move your car. If you swap a lower gear ratio diff, you'll get: 3.03.7200=2220lb/tq. Thats 360lb of torque to the wheels more right there just with that new differential. Not bad huh. Anyway, I dunno if you all were aware of that, don't want to sound like a smart ass.