Paulie964

So, I am considering pulling the trigger on a 1998 993 6 speed. What does it take to get one of these slipped into a 1990 964?

G50/20

Parman

I think i remember reading on the Early 911S Registry site that it is a direct bolt in. TLG made the comment so yoiu could call them.

race911

What's the goal here?

bobaines

I am in the process of having it done by Zuffenhaus at this time. The box is being re-geared and LSD added. It is a bolt in, but the while you are there slope is very slippery. Waiting on special order gears 1st and 2ed. Box will be close ratio using stock 5th in 6th and a tall first with the rest being an relatively even spread.

KaiB

I WANT one with a 1/1 6th gear.

It'll have to wait a while though.

Paulie964

Supposedly it is a little longer, but will directly bolt in. Also, because of the length difference, a 993 shifter rod would need to be used. Can anyone verify this?

And Ken, I'm looking to get a little extra "pull" out of the car ... Correct me if I'm wrong, but I've read that this is like "bolting on some extra HP"

KaiB

IMHO it's thrown away money unless gear ratios are altered while it's out...

If you build a close ratio box, you'll love it!

race911

Depends on the track. A couple of the only laps I could get from last Saturday at Laguna. (Go look at the thread on the 993 Forum under "When Good Gears Go Bad" for full explanation. If not, nothing really happens until the 4 min mark.)



Again, depends on the track and what you're trying to accomplish. A stock 5 speed in a 964 is preferable to the regeared 6 speed in my faux 993RS AT LAGUNA. In the above video, I'm at best even with what I ran (on equal tires) compared to my stock class RSA ~10 years ago.

Bottom line, with a stock engined 964 lightened maybe 200 lbs., I'd say until you're flirting with 1:40 at Laguna, under 1:50 at Sears, and flirting with 2:00 at Thunderhill (full), gearing isn't really a concern. Those are stock class with Hoosier times.

Jim Richards

One of the few things I disliked about my old 993 was the gearing.

Paulie964

Well, I was thinking about picking up the 993 one and selling mine. Over all, I wouldn't be out much (pending sale of my tranny). You guys don't think there would be much of a noticeable difference with just a direct swap?

I'd be happy with swapping out gears, but the cost to do so is a little on the high side. I've seen 2k just for 2, 3, 4 gears.

race911

Stock for stock, it's a degrade. Unless you just want a tall freeway cruiser gear. On track, again you have articulate what you're trying to accomplish. The gear charts are there, overlay them and see what's what. Then compare that to your splits on each track you run, in light of the pace you're running. In the video above, I'm ~6 seconds off pace and all I'm doing is shifting. But that's just for Laguna, and why I only go there every couple of years. Thunderhill and Sears it works out great. But the 100% stock 5 speed in the RSA worked pretty damned well everywhere.

Paulie964

Thanks guys, much appreciated. I just saw a great deal on a tranny and had a misconception in my head thinking that a six great tranny would be more of an enjoyable experience.

I guess I'll just move onto improving my suspension instead. My green H&R's with Koni Yellows are simply not cutting it anymore. I'd like to try linear springs instead of the progressive ones.

race911

It's light years beyond that. In the early 964 development days, we'd still be able to run 2:07 (Thunderhill)/1:45 (Laguna) with those on the old BFG R1s.

But if you want to ramp it up to something decent, talk to Tony Colicchio @ TC Design in Milpitas about the ex-Moton guys who've set up the Motion Control line. Will it be more than the other half-assed out-of-a-catalog kits the parts vendors sell? Yes. But the car will be sublime. (Personally, still slogging away with Moton Club Sports circa 2003 on the faux RS, but that's what it came with and they work.)

Paulie964

Ive looked for the H&R Supercups, and can't seem to find them anywhere. All other "reasonably priced" sets all have progressive springs which a somewhat soft. I'm not ready to tear up a $3k suspension on SF roads. I'd rather figure out the size of the springs, order stiffer ones, maybe rear sway and tinker around with dampening on the Koni's (for now) ... maybe even get camber plates, but wouldn't that throw of toe when changing?

Geoffrey

The 993 trans is a direct bolt in for the 964. The 993 gearing (1-5) is very similar to the G50/05, but with a longer 6th for fuel mileage. Unless you want the extra mileage, or are willing the change all of the gear ratios, it won't really help you.

I have one in my 964RSR, but it has all of the gear ratios and R&P replaced with race specific gearing to suit my engine.