Welded Diff?
12-19-2004, 04:57 PM
#11
Junior Member
Thread Starter
Join Date: Nov 2004
Location: Tampa,Fl
Posts: 27
^^^please explain?????
30min to take out open diff.
open diff 25bux at local U PULL IT junk yard...
time and money to weld diff. 20bux
30 min to install new welded diff.
problems?? what problems?
wow 50-75bux and i have a solid diff....what do i hafto loose?
like i said before the car is a saturday night/drift day car...NOT daily driver...
_Jason
30min to take out open diff.
open diff 25bux at local U PULL IT junk yard...
time and money to weld diff. 20bux
30 min to install new welded diff.
problems?? what problems?
wow 50-75bux and i have a solid diff....what do i hafto loose?
like i said before the car is a saturday night/drift day car...NOT daily driver...
_Jason
12-19-2004, 06:18 PM
#12
Super Moderator
Join Date: Sep 2002
Location: Savannah, Ga
Posts: 2,763
Open diffs wear tires extremely quickly. Its very hard on the axles, cv joints, and the diff itself. Its not a matter of if things break, its a matter of when things break. And it probably wont take that long, especially with the n/a diff.
Why not get a used n/a LSD? Its not very expensive. And its FAR cheaper than what a welded diff will incur.
And if you can install the diff in 30 minutes Ill start calling you houdini.
Why not get a used n/a LSD? Its not very expensive. And its FAR cheaper than what a welded diff will incur.
And if you can install the diff in 30 minutes Ill start calling you houdini.
12-20-2004, 10:09 AM
#13
Senior Member
Join Date: Mar 2004
Location: A2, MI
Posts: 453
the whole point of a differential is so that, going around a corner, the two rear wheels can spin at different speeds (because for a corner, the outside wheel travels farther than the inside one in the same amount of time). A solid differential does not allow this, it forces both wheels to spin at the same speed, not only reducing turn in (because one rear tire needs to loose traction to begin turning, whereas with a normal diff or open diff, both rear wheels can spin at slightly different speeds), but during the actual turn, since both wheels want to spin at different speeds but are forced to spin at the same speed, one tire loses grip (the inside tire), spins, causes more tire wear, wear on the driveshaft, cv joints, and diff itself, and creates more of a drifting-type situation. If you wanna do this, go for it, but for grip driving/autoX, or where you'd want more reliability and less of a tendancy to spin, get a real diff... I think early miata diff's fit, as well as a turbo II diff and gtu/gtus? not positive on these tho. Welding it will just cause more problems than its worth... if using a solid diff was really that great, why would other types have been created/used so often.
and that was a monster of an ultra-long sentence in the middle there.
and that was a monster of an ultra-long sentence in the middle there.
12-20-2004, 06:53 PM
#14
Senior Member
Join Date: May 2003
Posts: 1,784
Originally Posted by toplessFC3Sman' date='Dec 20 2004, 08:09 AM
the whole point of a differential is so that, going around a corner, the two rear wheels can spin at different speeds (because for a corner, the outside wheel travels farther than the inside one in the same amount of time). A solid differential does not allow this, it forces both wheels to spin at the same speed, not only reducing turn in (because one rear tire needs to loose traction to begin turning, whereas with a normal diff or open diff, both rear wheels can spin at slightly different speeds), but during the actual turn, since both wheels want to spin at different speeds but are forced to spin at the same speed, one tire loses grip (the inside tire), spins, causes more tire wear, wear on the driveshaft, cv joints, and diff itself, and creates more of a drifting-type situation. If you wanna do this, go for it, but for grip driving/autoX, or where you'd want more reliability and less of a tendancy to spin, get a real diff... I think early miata diff's fit, as well as a turbo II diff and gtu/gtus? not positive on these tho. Welding it will just cause more problems than its worth... if using a solid diff was really that great, why would other types have been created/used so often.
and that was a monster of an ultra-long sentence in the middle there.
and that was a monster of an ultra-long sentence in the middle there.
I know a lot of road racers with welded diffs. They do fine.
12-20-2004, 07:07 PM
#15
Senior Member
Join Date: Mar 2004
Location: Creighton Nebraska
Posts: 772
Originally Posted by mazdaspeed7' date='Dec 19 2004, 04:18 PM
i've gotten very good at installing diff's, 4 diff's in 3 month's will do amazeing thing's
12-20-2004, 11:37 PM
#17
Senior Member
Join Date: Mar 2004
Location: A2, MI
Posts: 453
Im just saying that generally, intentionally breaking something and then using it is a bad idea, especially in this case and from a physics/mechanics point of view. depending on your setup, it should make the car harder to turn initially, and then easier to lose rear grip mid-corner. This isnt necessarily a bad thing for road racing, it just causes a lot more wear, and can be trickier to deal with, espec. if you arent too experienced with the car (im not saying you arent, just in general). If your gonna do it with a spare diff., then hell, your car, try it out and let us know how it goes (I missed that part in your first post), but id advise against driving it on the street with the welded diff.
