kos11-12

Hi guys,
Just wanted to pass on some interesting info, I was looking at regearing my C4 gearbox and came accross a company that makes gears and a lot of athor things, they are around since a long time, make gears for Porsches, and other competition cars and a lot of athor things....
Basicly they could make any gears for our gearboxes, the cost is 650 € + 20 % VAT (tax) per set, it takes them 5/6 week,
Their web site is not updated, best would be to contact them,
from the call return and info I received by email they seams to be very serious and very nice people.
Obviously no affiliation at all .

Marrel & Pelin
+33 (0)477221147
contact@marrel-pelin.com

FeralComprehension

= per gear, right? Like, 1st is a "set", second is a "set", etc...?

kos11-12

it has to be 2 gears for each ratio, isn't it ?
I ask him for 3rd, 4th and 5th , I guess 1st is probably very expensive as it is part of a main shaft .

koenig_roland

What would be a good and smart gearing-upgrade for the G64.00 C4 box? Shorter gears for 3rd, 4th and 5th seems to be very expensive. Re-using 4th at new 5th gear and filling the gab between 2 and 5th with a new 3rd and 4th should be to short for me (i think).

What is about the 6-speed upgrades from ruf, when they build the CTR from 964 basis with 4-w drive. Have they used C4 cars for that? Is it possible to convert up to 6-speed and using a shorter final drive? I think, wie would need two new final-drives. One for the gearbox and one for the front-diff?!

kos11-12

Hi Thilo ,
Yes good point you could keep 5th for height speed motorway and economy and regearing 3rd and 4th so only spending 2 sets , so what's your top speed at the ring and Spa ?

The Ruf 6 speed must be from a 993 , just the box could be around 8 k , Had a quote from Freinsinger .

koenig_roland

I wasn`t at spa yet.
At the ring, on an open-pitlane TD i shift in 5th after galgenkopf when entering the döttinger höhe and is see something at round about 265km/h on the scales passing the döhö...

On the Redbull-Ring for example, i don`t need the 5th and can go up to the rev limiter in 4th at the end of the both main straights... If leaving 5h "long" and shorten 3th and 4th, the extended gab 4th/5th seems to be disadvantageous.

i think, stock gearing is not so bad and you are quite restricted in regearing a 5sp box for using it as a weekend-/clubsport warrior here in gemany. If doing it right, you should shorten 3th, 4th and 5th. But the 5th not that short like the OEM 4th is at the moment...

kos11-12

So at the Ring for how long do you stay at that speed, 265 ,
Spa , the straight is shorter but anyways the straight is not important enough for gearing there, it's loading a lot on the 2 fast double lefts corners I think.


I was thinking of a slight bigger gap between
4th and 5th
Like ;
41, 67, 90 or 92, 115 or 120, 150 or 155 ,

PAOLOP

Konstantin, trés bien fait!!!!!
Merci

PAOLOP

Yes Thilo you need two new R&P but you can only find different ratios (very short!!) from Porsche 953 (or 964 C4 Lightweight)

kos11-12

Freinsinger can build a 993, 6 speed with any ratios but , $$$$
Then needed main shaft, 993 diff, drives shafts
You lose 50 kg compare to c4,

Group buy for the 3 C4 G64 gears ?

koenig_roland

when i`ve to touch the box, i would convert to C2.... and with a C2 (and 65kg less weight and 15% less power loss in the drive-train) i would stick with my current gearing...

My car sees so often the rev limiter in 5th/gear... i could not shorten the drivetrain without a general speedlimit on german autobahn :-)
My convertible is to load inside to drive faster than 250kph

kos11-12

Hi Thilo,
Yes , as we discuss considering too converting the box to a C2,

J , you re driving at over 260 khm for a long time , isn't that canine too loud , your hears. must sound like a battery after sometime,
Haaa You wear hear plugs ;-)
I Remember hitting over 270 in Italy on a long flat motorway going to Milan, that was very noisy had to back off ,

Still far from hitting rpm limiter mine is set just above 6,8k like 7 I think

koenig_roland

Well kos,
it is noisy. yes. But for a hobby car not to load. Up to ~200, you could easily discuss with the passenger... :-)

kos11-12

Agree , 200 / 220 is cool ;-) ,