G28/07
12-23-2008, 11:56 AM
#16
Race Car
Infinitely variable from 0-100 is the best for me for street driving, now that I've driven both old and new for a while to get a fair chance to compare.
Dan
'91 928GT S/C
475hp/460lb.ft
Dan
'91 928GT S/C
475hp/460lb.ft
12-23-2008, 12:52 PM
#17
Instructor
Thread Starter
Thanx, good to know 
Thanx again
Thanx belgiumbarry, I`ll prob. just do that
Very interesting reading, thanx Erkka
I have had two BMW's with 25% ZF LSD. Every working later 928 LSD I have seen have had clearly tighter feel than those BMW setups. I simply don't buy this 20% thing no matter what anyone says unless some clear documentation can be found which proves it. Its true that late LSD can't be rebuild to 80% by changing parts like early style can but thats different thing. In any case, even 20% is better than nothing and much above 40% is too much.
12-23-2008, 02:13 PM
#18
Three Wheelin'
I have had two BMW's with 25% ZF LSD. Every working later 928 LSD I have seen have had clearly tighter feel than those BMW setups. I simply don't buy this 20% thing no matter what anyone says unless some clear documentation can be found which proves it. Its true that late LSD can't be rebuild to 80% by changing parts like early style can but thats different thing. In any case, even 20% is better than nothing and much above 40% is too much.
I mean, does rotating it by hand ( slow) gives a exact number as driving it , so the friction plates are rotating so much quicker ???
12-23-2008, 02:28 PM
#19
Rest in Peace
Rennlist Member
Rennlist Member
V8-Man,
The only way I would race anything less than a G28/10 is if I had a bunch of them like what Mark Anderson had and then got to the point of seeing the light :-)
I started with a G28/05, rebuilt it (big bucks) added LSD, replaced it with the G28/08 (transferred LSD), then finally found the G28/13 with LSD.
I will be happy to sell you the box, the 40% LSD is super tight, and the newer 20% is just as tight too! So, I agree with Errka on the lockup issues.
Cheers,
Andre
The only way I would race anything less than a G28/10 is if I had a bunch of them like what Mark Anderson had and then got to the point of seeing the light :-)
I started with a G28/05, rebuilt it (big bucks) added LSD, replaced it with the G28/08 (transferred LSD), then finally found the G28/13 with LSD.
I will be happy to sell you the box, the 40% LSD is super tight, and the newer 20% is just as tight too! So, I agree with Errka on the lockup issues.
Cheers,
Andre
12-23-2008, 03:05 PM
#21
Rest in Peace
Rennlist Member
Rennlist Member
12-23-2008, 03:40 PM
#22
Rennlist Member
So the tranny is a G28/05 (80 Euro/ROW), and the diff. came out of an 84 US? That's 2.36. It would be 2.73 if it came out of an 84 Euro/ROW. Curious....
12-23-2008, 04:12 PM
#23
Rest in Peace
Rennlist Member
Rennlist Member
I paid to have the LSD taken out of the rebuilt 05 and put into the 08 and the 08 open diff put back into the 05 so their rings should match their correct years.
All I know is the 05 that replaced the 08 behaved the exact same way and shift ranges and top end, so it must have been a Euro/ROW 84 because it is nothing like the 13 which is in there now
The 05/08 ran about 2800 rpms in 5th around 75MPH while the 13 runs 2200 rpms around 75MPH.
Does this help?
12-24-2008, 08:14 AM
#25
Instructor
Thread Starter
V8-Man,
The only way I would race anything less than a G28/10 is if I had a bunch of them like what Mark Anderson had and then got to the point of seeing the light :-)
I started with a G28/05, rebuilt it (big bucks) added LSD, replaced it with the G28/08 (transferred LSD), then finally found the G28/13 with LSD.
I will be happy to sell you the box, the 40% LSD is super tight, and the newer 20% is just as tight too! So, I agree with Errka on the lockup issues.
Cheers,
Andre
The only way I would race anything less than a G28/10 is if I had a bunch of them like what Mark Anderson had and then got to the point of seeing the light :-)
I started with a G28/05, rebuilt it (big bucks) added LSD, replaced it with the G28/08 (transferred LSD), then finally found the G28/13 with LSD.
I will be happy to sell you the box, the 40% LSD is super tight, and the newer 20% is just as tight too! So, I agree with Errka on the lockup issues.
Cheers,
Andre
I don`t have an unlimited number of trannys to play with, so I think I`ll listen to that advice
According to the WSM the G28/13 is for USA/Japan 87/88. Will that fit an euro TT?
Is it the 13 you are selling? I`m confused
12-24-2008, 08:17 AM
#26
Instructor
Thread Starter
12-24-2008, 10:43 AM
#27
Rennlist Member
Is Karsten a scandinavian name?Anyway,northgermany is like southsdenmark. ;-)
I ask 500 € plus shipping.A new one is ~1750 €.928 international ask 950 $.
I´don´t know how much shipping to norway cost.The housing plus dif is heavy.
We must compare numbers in PET because I buy this one for my 85 auto.After looking in the transmission we find a m220.
So,i can sell it.
I ask 500 € plus shipping.A new one is ~1750 €.928 international ask 950 $.
I´don´t know how much shipping to norway cost.The housing plus dif is heavy.
We must compare numbers in PET because I buy this one for my 85 auto.After looking in the transmission we find a m220.
So,i can sell it.
12-24-2008, 01:00 PM
#28
Nordschleife Master
Join Date: Sep 2004
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A G28/07 is fine for track use with stockish power. My car has a G28/05 with LSD. The CV joints and LSD were trashed after a couple weekends at VIR, but the tranny itself works perfectly fine.
12-25-2008, 02:28 PM
#29
Instructor
Thread Starter
That`s interesting FlyingDog 
I plan to just upgrade the exhaust and run a DTA S80 management system with "coil per plug" so I guess we`re talking stockish power. hhhhmmmm.......
I plan to just upgrade the exhaust and run a DTA S80 management system with "coil per plug" so I guess we`re talking stockish power. hhhhmmmm.......
12-25-2008, 07:26 PM
#30
Three Wheelin'
http://www.vertexauto.com/ListItems/Flag/Flag04.aspx
just for info... pitty they don't mention the Porsche number....
just for info... pitty they don't mention the Porsche number....