Quaife or OSGiken for 400+ engine ?
#4
Senior Member
iTrader: (1)
Join Date: Jan 2011
Location: Chattanooga, Tn
Posts: 1,234
Total Cats: 283
Good to know that the gearbox in my car that has lived behind a 400hp motor for 3 years of racing on 275 (now 295)mm wide slicks is no stronger than a stock 5 speed(That I killed 7 of in one season)
In Pro Solos we launch this thing at 5000 RPM and 21 PSI.
Most every issue I have seen with that gear-set is related to the instillation or build of the gearbox.
After 3 seasons I pulled mine apart for PM and found some spalling on the main shaft and lay shaft gears so I replaced them and the 2nd gear hub had some wear (I had forgotten that I reused an old used hub out of the donor box when I built it) so I ordered one of those from Mazda and threw new syncros in it and it's butter.
In Pro Solos we launch this thing at 5000 RPM and 21 PSI.
Most every issue I have seen with that gear-set is related to the instillation or build of the gearbox.
After 3 seasons I pulled mine apart for PM and found some spalling on the main shaft and lay shaft gears so I replaced them and the 2nd gear hub had some wear (I had forgotten that I reused an old used hub out of the donor box when I built it) so I ordered one of those from Mazda and threw new syncros in it and it's butter.
#6
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,104
https://www.miataturbo.net/build-threads-57/i-give-up-93051/
https://www.miataturbo.net/suspension-brakes-drivetrain-49/death-quaife-79417/
Plus a third non-public failure that I know of and can't discuss further.
I don't recommend Quaife 5sp boxes to my customers.
https://www.miataturbo.net/suspension-brakes-drivetrain-49/death-quaife-79417/
Plus a third non-public failure that I know of and can't discuss further.
I don't recommend Quaife 5sp boxes to my customers.
#16
Good to know that the gearbox in my car that has lived behind a 400hp motor for 3 years of racing on 275 (now 295)mm wide slicks is no stronger than a stock 5 speed(That I killed 7 of in one season)
In Pro Solos we launch this thing at 5000 RPM and 21 PSI.
Most every issue I have seen with that gear-set is related to the instillation or build of the gearbox.
After 3 seasons I pulled mine apart for PM and found some spalling on the main shaft and lay shaft gears so I replaced them and the 2nd gear hub had some wear (I had forgotten that I reused an old used hub out of the donor box when I built it) so I ordered one of those from Mazda and threw new syncros in it and it's butter.
In Pro Solos we launch this thing at 5000 RPM and 21 PSI.
Most every issue I have seen with that gear-set is related to the instillation or build of the gearbox.
After 3 seasons I pulled mine apart for PM and found some spalling on the main shaft and lay shaft gears so I replaced them and the 2nd gear hub had some wear (I had forgotten that I reused an old used hub out of the donor box when I built it) so I ordered one of those from Mazda and threw new syncros in it and it's butter.
#19
The reason we created the BMW trans kits is because there was demand for something other than a Miata trans in these cars. We weren't seeing people overall very satisfied with the Quaife gears.
E46 6-speed kits are about to drop, as well as our bolt-in Torsen mount for an easy PPF delete. So that will be another option to consider as well.
E46 6-speed kits are about to drop, as well as our bolt-in Torsen mount for an easy PPF delete. So that will be another option to consider as well.
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Home of the original KMiata Swap
K24 NC swap is coming in 2024! Learn more
info@kpower.industries
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#20
The reason we created the BMW trans kits is because there was demand for something other than a Miata trans in these cars. We weren't seeing people overall very satisfied with the Quaife gears.
E46 6-speed kits are about to drop, as well as our bolt-in Torsen mount for an easy PPF delete. So that will be another option to consider as well.
E46 6-speed kits are about to drop, as well as our bolt-in Torsen mount for an easy PPF delete. So that will be another option to consider as well.