993 6 SPEED

[mclark]

I have the chance to buy the above box.

Do the factory have to know what type of G50 you have before they make the chassis?

Cheers

Michael

[G Man]

I use this box G50-20
Fits nicely

G Man



>> Edited by G Man on Tuesday 28th September 19:18

[gdr]

For long or short G50 I think they just supply appropriate tranmission mounting bracket that bolts to rear of chassis, but best give them a call to check.

[steve_D]

Just let them know the type you have an they will supply the correct rear bracket. They also need to know when supplying the clutch and starter.
I also have that box.
6 gears are not necessary with the torque you get from the Chevy.
If I ever need to rebuild my box I will get a nice tall 6th gear as my current rev limit of 6500 would (in theory) only take me to 190mph. 200 would be nice.

G_man will get over the 200 because his engine is built to pull silly revs (circa 8000).

Steve

>> Edited by steve_D on Tuesday 28th September 20:53

[mclark]

Steve,

Interesting, the engine I hope to get also tops out at 6500rpm.

190mph, get out

Don't tell the wife

[G Man]

I believe I tail off at 222mph

G Man

[B1 ECC]

Bouncing off the rev-limiter(6200) on the the straight at Spa,the speedo and the GPS says 167mph. Hope to see you big number boys next year!! BTW the limiter is a precaution

[G Man]

B1 ECC said:

Bouncing off the rev-limiter(6200) on the the straight at Spa,the speedo and the GPS says 167mph. Hope to see you big number boys next year!! BTW the limiter is a precaution

B1 ECC do you run a G50-20, you speed equates to 27mph per 1000 revs, when I did my calcs years ago that was the number I got on a G50-20, based on than my top speed would be

205 mph at 7600 rpm
216mph at 8000rpm unlimited

Of course this is just theoretical cause no-one would drive their car to the max on public roads, would we

[ultiman]

Is anyone still using the G50-50 box. I would recommend that as it is a sliver under 30mph/1000 revs, giving me 180 at 6000 revs or 186 at 6200, a nice neat 300kph. Good for impressing the Europeans and good for long distances also. As Steve says, the torque is enough to make 6 speeds redundant.
Is the 50-20 the cable operated box?

[B1 ECC]

No, i'm using the 5 speed with lsd, however, I have the slightly taller ring & pinion (3.33-1) instead of the 3.44-1.

[gdr]

How easy is it to change diff ratio on a G50 box? Are different ring & pinions readily available, special tools needed for dismantling and assembly etc etc? Or is this best left to a specialist. Stretching the final drive on my G50/03 by 15% or so is on my wish list.

[steve_D]

The 50-20 is not cable.
Have a play with this for gear calcs.
You will need the ratios. I have some for the 50/20, 50/52 & 50/00.

Steve

Edit...GDR the 'box strip is quite involved and requires a number of special tools. Whether you need them all just to change the diff is a different matter.

>> Edited by steve_D on Wednesday 29th September 18:54

[mclark]

Hi Steve,

Can you provide me with the raios for the 50/20 6 spd.

Thanks

Michael

[steve_D]

G50/20
3.818, 2.048, 1.407, 1.118, 0.928, 0.775, diff 3.444
G50/52
3.154, 1.789, 1.269, 0.967, 0.756, diff 3.444
G50/00
2.690, 2.000, 1.530, 1.180, 0.920, diff 3.444

Steve

[B1 ECC]

gdr said:

How easy is it to change diff ratio on a G50 box? Are different ring & pinions readily available, special tools needed for dismantling and assembly etc etc? Or is this best left to a specialist. Stretching the final drive on my G50/03 by 15% or so is on my wish list.

Not easy, although it can be done, you need a serious toolbox, a press, and lots of pullers. Oh' and a really methodical way of working. Did I mention patience !!