X-post: G50/01 1st gear launching longevity with boost

[Tippy]

First off, I know these are not drag cars, so spare the words of wisdom please.

I am going to be hooking up launch control in my turbocharged Carrera 3.4 that has MegaSquirt. This should allow me to mash the throttle to the floor with the clutch in and bring up the boost to whatever amount I set it to by timing retard, RPM, etc.

Was thinking about 4-5k RPM and hopefully seeing around 5 PSI or so before releasing clutch.

Question is, will the G50/01 withstand this much power off the line in first?

I have the Kennedy Stg II PP and kevlar disk. Clutch is up to par.

Is the diff cover a weak point? I know the cover is very light and feels like it can't take much torque but wasn't sure.

[Tippy]

Guess I'll be the guinea pig.....

[Matt Monson]

Nah. You aren't a guinea pig...
The Wheelies are back

[spuggy]

LOL. I seem to remember Juan posting years ago that the axles were the weak link, but that he preferred to regarded them as a "fuse" and just replace them, rather than the entire tranny...

[spuggy]

Originally Posted by Tippy

I am going to be hooking up launch control in my turbocharged Carrera 3.4 that has MegaSquirt. This should allow me to mash the throttle to the floor with the clutch in and bring up the boost to whatever amount I set it to by timing retard, RPM, etc.

Was thinking about 4-5k RPM and hopefully seeing around 5 PSI or so before releasing clutch.

I'm curious how you're intending to make boost without load?

[Les Paul]

Could you explain how launch control works for these cars?

[juan ruiz]

Was thinking about 4-5k RPM and hopefully seeing around 5 PSI or so before releasing clutch.

4.5K RPM

Question is, will the G50/01 withstand this much power off the line in first?

Yes, Axle's won't either the inner hub our outter hub or both

you can skip to the 1.25 mark

Sunday Fun - YouTube

I have the Kennedy Stg II PP and kevlar disk. Clutch is up to par.

Not for long if you plan to do this often

Is the diff cover a weak point?

Yes a Billet side cover is a must

[Tippy]

Originally Posted by spuggy

I'm curious how you're intending to make boost without load?

Originally Posted by Les Paul

Could you explain how launch control works for these cars?

Severely retarded timing with random cylinder spark removed. Hold pedal to the floor and the motor is in an artificial load.

Originally Posted by juan ruiz

Was thinking about 4-5k RPM and hopefully seeing around 5 PSI or so before releasing clutch.

4.5K RPM

Question is, will the G50/01 withstand this much power off the line in first?

Yes, Axle's won't either the inner hub our outter hub or both

you can skip to the 1.25 mark

Sunday Fun - YouTube

I have the Kennedy Stg II PP and kevlar disk. Clutch is up to par.

Not for long if you plan to do this often

Is the diff cover a weak point?

Yes a Billet side cover is a must

Are you talking about a G50/01 or a G50/52? I'd imagine these are totally different in power ratings.

I've done some high-RPM launches in 2nd and the disk looked really nice afterwards when I tore it down. Seemed to have no material removed and a nice yellow color - no blackening or glazing over.

I thought that was the claim to fame for kevlar disks.....

[Matt Monson]

Originally Posted by Tippy

Are you talking about a G50/01 or a G50/52? I'd imagine these are totally different in power ratings.

The ring and pinions between the two boxes are substantially different. The 1st gear and mainshafts are not.

The thing about 1st gear is that with any sort of significant power, you'll have more power than traction because 1st is such a short ratio. It's hard to break the gear if you're spinning the wheels all the way until you make the shift to 2nd.

[Tippy]

Thanks Matt, that seems to be the concensus from the 930 board too.