Mating a VW VR6 to a RWD gearbox
Discussion
Are there any gearboxes that will enable a VR6 engine to be run in a RWD car with relative ease? The only way I can think of (if they mate) is run an Audi 4WD box with the centre diff welded up and front driveshafts removed.
...otherwise its a custom bellhousing to whatever RWD box I find knocking about.
Regards
Iain
...otherwise its a custom bellhousing to whatever RWD box I find knocking about.
Regards
Iain
From memory 034 motorsports make an adaptor to fit the vr6 to the Audi transaxle, use this, a Porsche 924 turbo (or na if you want cable clutch) bellhousing and torque tube and the audi/924/944/968 transaxle of choice in the rear of the car.
If you weld the Audi 4wd box up to make it RWD only it is unlikely to survive very long, the general consensus is even on standard engines it places so much extra stress on the rear shaft then things start going bang quickly. Run in 4wd mode though it is a tough box, the same box in 2wd version used in various forms through the above cars is also tough and available in a variety of speeds and diff options. The torque tube set up also includes a very neat linkage and will add a strong spine to your car stiffening it up.
If you weld the Audi 4wd box up to make it RWD only it is unlikely to survive very long, the general consensus is even on standard engines it places so much extra stress on the rear shaft then things start going bang quickly. Run in 4wd mode though it is a tough box, the same box in 2wd version used in various forms through the above cars is also tough and available in a variety of speeds and diff options. The torque tube set up also includes a very neat linkage and will add a strong spine to your car stiffening it up.
Grrr, this is starting to get quite messy as I dont really have room for a transaxle and currently run inboard discs on on a Jag diff.
I guess the other option is to make a custom bellhousing to mate to the existing Ford type 9 gearbox.
Thanks for your inpust thus far, keep any more thoughts coming.
Regards
Iain
I guess the other option is to make a custom bellhousing to mate to the existing Ford type 9 gearbox.
Thanks for your inpust thus far, keep any more thoughts coming.
Regards
Iain
vr6 engine was only really designed for front wheel drive type layout and in my opinion is not the best engine to work on it works well in the golf as its layout helps when work is carried out to the engine, there are coolant housing and service covers on the gearbox side of the engine if you mount your engine length ways its going to be engine out to get to that side of the engine etc. and the inlet maifold flows towards gearbox side to so if you fit your engine in length ways the inlet duct is going to face the bulkhead so your gonna have problems, sump pan could also be issue if your car has a cross member to clear, would it not be better to mount an inline 6 like out of a supra or bmw.
Edited by skid-mark on Wednesday 8th April 23:10
Thread revival!
Looking at doing something with a VR6 driving the rear wheels. I'll stick a thread up in a Reader Rides in a couple of weeks when we get the Corrado. Any further advice or discussion would be welcome, not afraid of a challenge and we'll be doing this ourselves mostly to learn and because racecar... So no need to pamper me with reasons why not or alternative engine options.
Looking at doing something with a VR6 driving the rear wheels. I'll stick a thread up in a Reader Rides in a couple of weeks when we get the Corrado. Any further advice or discussion would be welcome, not afraid of a challenge and we'll be doing this ourselves mostly to learn and because racecar... So no need to pamper me with reasons why not or alternative engine options.
You should first pick a rear drive box to work with that can take the torque probably the Ford Cosworth T5 then it's about bellhousing bolt pattern which would need an adaptor.
Clutch plate spline
Clutch cover size
Spigot bearing that matches crank and gearbox
Its doable but not a straight bolt up job
Clutch plate spline
Clutch cover size
Spigot bearing that matches crank and gearbox
Its doable but not a straight bolt up job
Would some of the old Volvo boxes have a similar BH pattern ?
ie. Old 940 6 cyl diesel was a VW unit, and that same BH pattern was used on some I5 diesel VAG engines too.
Failing that, it probably wouldnt be hard these days to have a CNC adaptor made up to bolt another box to the engine. Cheaper and easier than a complete bellhousing.
ie. Old 940 6 cyl diesel was a VW unit, and that same BH pattern was used on some I5 diesel VAG engines too.
Failing that, it probably wouldnt be hard these days to have a CNC adaptor made up to bolt another box to the engine. Cheaper and easier than a complete bellhousing.
Hi All
I've done something a little similar - I'm building an AC cobra replica with Audi S5 running gear and a VR6 turbo motor.
If you want to RWD a VR6 easily you can use the parts from a Passat VR5.
The VR5 and VR6 use the same bell housing pattern and crankshaft bolt pattern.
The Passat VR5 has an adapter plate between the engine and 01A or 01E gearbox
If you can find the adapter plate, a flywheel and clutch, bolt the VR6 up to an 01A or E gearbox with the Center diff locked or welded and you're laughing RWD down the road
.
I have an S4 2.7T 01E box mounted to a forged turbo VR6 currently sitting in the AC cobra chassis - it's lively !, I've had to weld my torsen and it seems quite happy with 480HP through it !
There's a few older pics of the build on the vr6oc forum - it's much further along now !
Ta - Sam
I've done something a little similar - I'm building an AC cobra replica with Audi S5 running gear and a VR6 turbo motor.
If you want to RWD a VR6 easily you can use the parts from a Passat VR5.
The VR5 and VR6 use the same bell housing pattern and crankshaft bolt pattern.
The Passat VR5 has an adapter plate between the engine and 01A or 01E gearbox
If you can find the adapter plate, a flywheel and clutch, bolt the VR6 up to an 01A or E gearbox with the Center diff locked or welded and you're laughing RWD down the road
.I have an S4 2.7T 01E box mounted to a forged turbo VR6 currently sitting in the AC cobra chassis - it's lively !, I've had to weld my torsen and it seems quite happy with 480HP through it !
There's a few older pics of the build on the vr6oc forum - it's much further along now !
Ta - Sam
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