Welded Open Diff
07-04-2008, 02:20 PM
#21
my screen name refers to my galant vr4.
not my miata
although if i cared to, my miata is fully built, i would just need bigger injectors and a slightly larger turbo (gt2860 is in it now) to be efficient at that boost pressure. and yes, i would run it on my welded diff.
and no, if you read my previous post you would know why i thought that, but apparently it does happen if the desire to race is there and the deep pockets aren't.
The preferred differential for Spec Miata is still the clutch-type. While it is true that many national and regional drivers are upgrading to the 99+ TORSEN type differential as allowed by the 2007 General Competition Rules published by the SCCA there are still several top level teams that will swap out the clutch type for track specific needs, and various events where the .1 - .2 s/lap difference makes a difference. The torsen is heavier (markedly) and a bit "slower" but much more reliable. Very few, if any, competitive drivers are using a welded open diff. Not only is it slow, it is not legal as per the GCR. For the record I do not believe the open differential is technically legal either, but it's so damn slow no one would care if you used it, and I did for several years when funds were limited.
-Blake Thompson
SM 97
2008 June Sprints Also-Ran
IsellMiataParts.com
and yes we are pretty amusing although not nearly as amusing as u mormons!
i'm sorry i meant to say ''morons''. whateva, same thing. then again, i'm from michigan, but i got down here soon as i could!
not my miata
although if i cared to, my miata is fully built, i would just need bigger injectors and a slightly larger turbo (gt2860 is in it now) to be efficient at that boost pressure. and yes, i would run it on my welded diff.
and no, if you read my previous post you would know why i thought that, but apparently it does happen if the desire to race is there and the deep pockets aren't.
The preferred differential for Spec Miata is still the clutch-type. While it is true that many national and regional drivers are upgrading to the 99+ TORSEN type differential as allowed by the 2007 General Competition Rules published by the SCCA there are still several top level teams that will swap out the clutch type for track specific needs, and various events where the .1 - .2 s/lap difference makes a difference. The torsen is heavier (markedly) and a bit "slower" but much more reliable. Very few, if any, competitive drivers are using a welded open diff. Not only is it slow, it is not legal as per the GCR. For the record I do not believe the open differential is technically legal either, but it's so damn slow no one would care if you used it, and I did for several years when funds were limited.
-Blake Thompson
SM 97
2008 June Sprints Also-Ran
IsellMiataParts.com
and yes we are pretty amusing although not nearly as amusing as u mormons!
i'm sorry i meant to say ''morons''. whateva, same thing. then again, i'm from michigan, but i got down here soon as i could!
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07-04-2008, 07:20 PM
#23
In the old days I ran an RX-3 on the street with a welded diff. I purposely ran skinny tires and had no problem going around corners at low speed. The traction was incredible even with the 175/70-13's. The only time it was annoying is when pushing the car and turning the wheel at all.
I was going to run a welded 1.6 diff at a drift even but ended up just installing the Torsen. (because after welding the spider gears I lost my mind and sprayed carb cleaner on the hot bits and heard a big 'clink' which was something cracking in the diff. I immediately threw it in the junk pile and installed the Torsen)
I was going to run a welded 1.6 diff at a drift even but ended up just installing the Torsen. (because after welding the spider gears I lost my mind and sprayed carb cleaner on the hot bits and heard a big 'clink' which was something cracking in the diff. I immediately threw it in the junk pile and installed the Torsen)
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09-02-2008, 12:19 AM
#28
diff - rant
Haha yes both actually, around roundabouts....(if you have them up there yet) or other tight corners it does cause understeer- drop the clutch a bit and that remedies that problem. 
The only real annoying thing, is going through a drive thru - all the other times you just look tough!
The only real annoying thing, is going through a drive thru - all the other times you just look tough!
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