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Quaife or OSGiken for 400+ engine ?

 
Old 03-24-2018, 02:49 AM
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Default Quaife or OSGiken for 400+ engine ?

I'm looking for the best transmission upgrade, a gear set upgrade sound better then the kmiata swap... it is bolt on and all.

What are the pros and cons of this sets ?

Thanks
Elior

Last edited by elior77; 03-24-2018 at 05:48 AM.
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Old 03-24-2018, 04:16 AM
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The Quaife gearset is not stronger than the stock gears, they just provide alternative ratios for stock power level cars.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
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Old 03-24-2018, 04:20 AM
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I asked about 400-500hp engine
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Old 03-24-2018, 05:11 AM
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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.
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Old 03-24-2018, 12:03 PM
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Originally Posted by TNTUBA View Post
Good to know that the gearbox in my car that has lived behind a 400hp motor for 3 years
How much torque? Auto-X?
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.
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Old 03-24-2018, 12:42 PM
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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.
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Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 03-24-2018, 02:08 PM
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Originally Posted by elior77 View Post
I'm looking for the best transmission upgrade, a gear set upgrade sound better then the kmiata swap... it is bolt on and all.

What are the pros and cons of this sets ?

Thanks
Elior
For your purposes:

Pros: None
Cons: All.
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Old 03-24-2018, 02:14 PM
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kmiata then ?
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Old 03-24-2018, 02:15 PM
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Readily available kit to swap on a transmission that is known to be stronger than what you have. Does this sound good or not?
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Old 03-24-2018, 02:18 PM
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I read the installation instruction... not a pretty sight...
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Old 03-24-2018, 02:19 PM
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True. Better install something that won't hold up to the power instead. At least it'll be easy, right?
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Old 03-24-2018, 02:20 PM
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Just making conversion no reason to jump all over me... but this is how you guyz like it - no ***** left for that.
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Old 03-24-2018, 02:23 PM
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Ok well what are the choices? I'm not sure what the question is anymore. Either make less power, or put a stronger transmission on it. Or just swap transmissions every couple weeks.
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Old 03-24-2018, 02:33 PM
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This is a discussion - I am discussing things.

I know the kmiata is a valid option - just trying to get some input on other solutions - any input on the osgiken gears ?

Thanks
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Old 03-24-2018, 02:36 PM
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Gears inside existing case will not keep together at your intended power levels. You need a different transmission.
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Old 03-24-2018, 09:43 PM
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Originally Posted by TNTUBA View Post
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.
So what you're saying is that in the amount of mileage of 5 track days you were another track day or two worth of mileage away from losing the main and layshaft gears to spalling. If the gears were spalling thats constant torque failure and not impact loading from the launches. Ricer math still put that as in the ballpark of 6 speed strength.
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Old 03-25-2018, 09:13 AM
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Has this car even been dyno'd ? Are we just chasing unicorns here? 500 hp....
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Old 03-26-2018, 06:36 AM
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For the record, the shifter on the kmiata bmw swap feels as precise as operating a bolt action rifle. Its fantastic. See Tony Montana's build thread for pics of the installation.
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Old 03-26-2018, 02:09 PM
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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.
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Old 03-26-2018, 02:15 PM
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Originally Posted by KMiata View Post
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.
My body is ready.
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