Rippers

What sort of running gear/transmission would you use to get the Cosworth engine rear mounted?
What did the RS200's use? and the YB Cosworth RS200 replicas?

rst in breaking

iTrader: (2)

if the engine is rear mounted could you not use a mtx75? if its rwd its just a matter of using a front wheel drive box and mounting the engine?

Rippers

The engines in RS200's and the rep are mounted longitude

Chip

iTrader: (3)

MTX75 will work, I have a clutch and flywheel (both new) that came form the mondeo FWD cosworth I broke that was on this box.
150 quid the pair if you want them, they are just getting in my way anyway, lol

carlo

iTrader: (4)

You got a new project paul?

Chip

iTrader: (3)

Apologies, you hadnt posted that when I clicked reply, obviously my setup is of no use if you want to go longitudinal!

Rippers

No probs Its more out of interest rather then another project, was curious as to have the RS200 running gear worked out

Dirty Harry

iTrader: (12)

the proer thing to use would be a Hewl;and box but there very expensive,what most use is a VW tansaxle box

kentdude

in my rs200 replica i have a renault un1 box with a specially made bell housing
i hope this helps if you need any pics just pm me

polly_x

iTrader: (2)

Paul, Porsche Boxster S 6 Speed would ge a good candidate. Think its called the G50 and made by Getrag?

Obviously need some fettling to mount to a YB but not impossible.

I think the other good one that some of the RS200 reps use is one of the Renault trans axle jobbies?? Not sure if thats correct description. Think its a good strong box up to 350/400 BHP but struggles after that.

Elite also do a suitable sequential box. Not sure on the number but a mate of mine has one in his 500BHP RS200 rep and seems happy with it.

Rippers

Great info stu! The 6-speed Porche box seems like it would be a good conversion but would you need a custom bell housing made or something? ie loads of money

Turbo Zetec

iTrader: (1)

the rs200's used a gearbox in the front, with a high speed prop connecting the engine to it and another feeding the rear diff from the gearbox. iirc, the front diff was part of the casting of the gearbox, or at least bolted to it.

audi's use transaxles, as do porche and renault. a subaru box might work if you can make it drive just from the front...

evo200

iTrader: (1)

Renault UN1 transaxle out of a 21 turbowith custom bellhousing in the back of my evo 200.

steveboyslim

The RS200 also has a transfere box (two gears) which is driven by the input shaft/quill shaft from the engine, the output from the transfere box drives the high speed prop shaft, which drives the gearbox.
the transfere box is needed to reverse engine drive as the engine is mounted with the front of the engine to the rear of the car not to the front, but has a useful side effect of an easy way to alter the overall gearing if the ratio of the transfere box is altered.
The engine is also tilted over 23 degrees to clear the propshaft (which has a bearing mount to the bellhousing) driving the rear diff.

Steve

Jay,

iTrader: (4)

the issue with using the un1 box is that theywill only take 300lb of torque then they shit themselves inside out as the input shaft is 2 piece and the 2nd gear shaft is to thin and bends ,also the diff is shite but you can get a gear kit and diff for 4k

westus1

iTrader: (6)

prob need to be a hewland tranx box, we used these when i was workin with the rotor racing team,
ours were rated at sumfin like 430bhp, we were only runnin around 250 so never had any bother with them,
very easy to strip down and change the gearing as well

Jay,

iTrader: (4)

paul another thought the gt40 kit car boys use the un1 on 500+ bhp v8s might be worth looking around the car clubs for a beefed up s/h un1

PAUL S

iTrader: (8)

F1 spec Hewland FGB in my rear engined YB project.

The RS200 used a forward facing box the same layout as a 911 etc where as the reps use rear mounted

The Youth.

iTrader: (1)

my m8 jims rs 200 rep had a un1 box but he found to be very poor on track, so he replaced it with a quaife 6 speed sequential box out of a gt race car, made a huge difference to the car



steve

Rippers

Some awesome info here guys, it makes a theory on Cossi'ing a certain car reality especially as I've since found out it has a UN1 box as standard.. hmmm

Lee_R21Turbo

iTrader: (1)

There arent many cars with a UN1 box as standard so that kind of narrows it down!!!

If you need a UN1 box I've got one I've just taken out of my 21 Turbo with 79k on it!!

PAUL S

iTrader: (8)

6r4 used a similar layout to the RS200





and here is mine, a bit dusty but you get the idea, the woods just for mock up I dont plan on using 12mm of plywood to hold the arse end on

Jim S

Paul

Lotus Esprit by any chance?

The photo that Steve “The Youth” posted is of my replica RS200, as mentioned previously in this thread the UN1 can’t take much more that 300 odd lbs’ft of torque when used in anger.

Main failings are the overhung 5th gear (like many 5 speed boxes, the 5 speed UN1 is the earlier 4 speed version with an extra gear hung on the end!), the small diameter splined link between the clutch/input shaft, and the first motion shaft and flexing of the first motion shaft between the two ball bearings due to the thrust pushing them apart, these problems can all be upgrade.

I looked at modifying my UN1 transaxle but it was always going to be a bit of a compromise, which could have been acceptable if the price was right, as in low, unfortunately spending 4k+ on a box that is still going to have poor gear ratios and a poor gear change quality wasn’t going to be a worth it in my opinion, maybe OK for road use but not for track or competition work.

Luckily for me ebay came up with a Quaife six speed sequential transaxle, which cost quite a bit but compared to a new one was a bargain.

A good source of info for the UN1 can be found at

http://www.un1.co.uk/index.htm

I hope this helps

Jim

A better photo of my transaxle

Shonky

Could you run a gearbox from a 20vt Passat, cheap enough to buy, will take a bit torque, Martin has already done one a gearbox conversion plate for a 20vt --> Rover so he's half done a 20vt to cosworth one!

becko

hello all.. new here .... interested in the gearbox conversion plates... who's ' martin ' sounds like i need a chat with him

chris

Daviet

http://reyland.co.uk/

sure his username on here i martin@reyland

Glenn_

iTrader: (1)

Whow what a cracking project this will be.

foreigneRS

alfa 75?

landamalta

tought about an alfa romeo box they have a lot of stock cars with rear mounted box one of them is the 75 it had a v6 engine at around 300 bhp mine is a twin spark turbo at 500 bhp and the box does fine tough you have to upgrade the synchromeshes

Ginge !

the porsche box as the engine mounted backwards compared to those engine layouts but the G50 is a very strong box and easy enough to get loads of spares too

another alternative is to have a 944/928 set up but in reverse,, they have the engine in the front pf the car attached to a propshaft and to the gearbox at the back if the car for weight distribution hence they handle quite well

stu21t

I've got a Renault un1 box in mine. I've been running 400/400 for a while and have no problems so far. A lot of it is due to the car being light.
It's not the best box out there but for the price you won't find better.
All the parts are off the shelf therefore cheaper/easier than all other options.
Ł1200 ish all in, ready to bolt on the car 2nd hand box with new bits needed to fit a yb.

Franco

iTrader: (2)

What are you up too now!

Chip

iTrader: (3)

Now?

Dont you mean "what were you planning last september?" as this is an old thread mate!

Franco

iTrader: (2)

Ahh ballbags............ thought I'd got away with that!

Charlie Chalk

iTrader: (1)

Obviously not LOL


ps: How was Avatar

Mark V8

iTrader: (2)

What about the 6 speed Audi 01X box as used in the link below ?

http://www.motorgeek.com/phpBB2/viewtopic.php?t=9648



You could always use the Audi engine as well

Mark

evo200

iTrader: (1)

I think there is a conversion kit for the cosworth YB to the Audi transaxle.

Try Bill at RS motorsport, www.evo200.com

graham c

iTrader: (5)

why dont they just put the enging in backwards and turn the front and back diff round ? and put a pivot on the gear lever then it still works the same way?

m4tt274

iTrader: (2)

i didnt know the audi engines were mounted so far forwards as to enable a longitude mount and retain FWD

Franco

iTrader: (2)

Dunno, couldnt be arsed!