It seems like comparing the 930 gearbox (74-75) to the G-50 (85-86) is like comparing apples and oranges. Two totally different trannys built by two different companies in two different automotive eras. I believe the impetus for the 930 gearbox was the failure of the 2.1 RSR carrera turbo car at Le Mans in 1974. The prototype 2.1 turbo had the race won until the Porsche 915 gearbox failed more than halfway thru the race. Ironically the winning Matra also had a failure in their 915 gearbox which was furnished by porsche. The 915 was suitable for RSs or RSRs but it unfortunately had its limits. Along came the 930 gearbox which was developed in a very short period of time. I’m surely not a 930 sycophant but I dont recall a production G-50 ever winning at Le Mans. Agreed the G-50 is superior gearbox which is evident in the evolution of the 930/964 turbos, nonetheless I still enjoy the history and racing lineage of the 930 gearbox.

not sure you have much idea what you are talking about.
i have a 964 turbo.
the five speed ****s all over the 930 4 speed, end of story.

my mate has a 930, whilst the 4 spd is cool in a period way, every time we are on track he comments that he wishes he had five speed. Even with the extra power (about 430hp, so probably roughly about 500 hp in the US) he laments not having smoother shifts and better ratios.

Speaking as a person who used to have a 5 speed Ruf tranny and prior to that had a short geared 4 speed in my last car...and now a stock 4 speed in my current 930...In my opinion I rather have the Ruf 5 speed period

Except those aren't the facts. The 930 gearbox was in production all the way up through the 1988 model 930. It's gears were used in all of the 935s and the 956/962s were a 5 speed derivative of the same design. It didn't have a 2 year lifespan. It had a decade and a half lifespan with things overlapping (like the G50 in a 1986-88 Carrera and a 930 4spd in the same year 930s). And most importantly, Getrag was making it.


http://forums.pelicanparts.com/uploa...1545760632.jpg

This is an NOS 935 gear. See that logo between the week and year? That's Getrag's. It is a modified G with an "H" pattern for shifting where the tail goes. Porsche's relationship with Getrag as OEM supplier goes back to the 50s and the 356s.

The first time Porsche raced a G50 derivative was in 1986 in the 961. It was a version of what became the 959 gearbox and was eventually used as the basis for the 964 C4. That year they came in 7th overall, racing against Group C 962s, and won their class. Pretty shortly after that, Lemans became a prototype race for a number of years, but when GT cars returned, Porsche was there with 964 based RSRs running their G50 5spd gearboxes in them, and winning races. All the 993 RSRs and GT2s and the GT1 were also G50 gearboxes. The Cup Cars of all eras from 964 through to 996 used G50 Getrag family gearboxes all the way up until we had Holigner design a sequential gearbox conversion for them and started putting them in 996 RSRs.

^
inconceivable !!!!

Good grief.




I wish my 930 gearbox was as quick to 155mph as that darn 915 was......both of them. Two because they both blew up but they were really great ratios. That 4th in the 930 is looooong.

As antiquated as the 930 4 speed may be, I prefer it as well. I simply enjoy the less rowing while on full boost, as well as a more usable 1st gear. The 1st 930 I purchased has the G50/50 in it, but every 930 I’ve purchased since then has the 4 speed. To each their own I guess. I also prefer cab’s, which get crapped on as well. LoL

Fact.

And he just posts threads like this knowing the debate will follow.

Fish on! Lots of them...


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i think the 4 speed was a poor choice for the 930 much like trying to drive a race engine on the street.
with all the turbo lag the 930 is only good from 3500 to7k.

take it to a track then HOPE you can stay in that range for the turns.

perhaps one of the reasons Porsche put the 4spd in it was for 0-60 times, no shifting.
one other reason for the tall 1st is perhaps due to its speed. imagine how fast you would have to shift with a 35-40 mph 1st.
maybe another reason for the 4sp is that the shifting is so poor Porsche wanted to increase the life by reducing the number of shifts.
its a good box but it needs closer ratios, and perhaps not as tall a top gear.

to the OP, when you put tall loooong gears in there it slows the car down.

You guys just aren't making enough power.

3 speeds are elite.

2 speeds are even faster.

https://www.youtube.com/watch?v=IkbKQLoOApM

I wish someone would make a sequential gearbox for the old girl. One that can take 1000hp and I could use paddle shifters! That would be awesome but then it wouldn’t be a 911 turbo. At least the shift experience.

The 930 gearbox would be a mess in an na car. At least with the stock final drive.

The 930 is iconic, but had compromises to suit both racers and city streets. Yes it had floating rotors and a turbocharger but it also had coathooks and a rear wiper, remember the first 930 went to his daughter.
I think we forget that sometimes when we think of a single purpose and say the car would have been better if. . . Would Dolly Parton really have been better with bigger t*ts?