Audi RS6 engine with porsche turbo gearbox
Discussion
Just had a thought - could be a stupid one though so bear with me.
I like the idea of an Audi engine - either the V8 turbo RS6 or the V10 later one, as i think they are a more refined engine than the LSx ones, and its a bit different which is what building a car is all about.
I appreciate that there are engine/gearbox mounts that will need fabricating - thats a given.
I would of thought that the biggest issue other than the wiring (but thats for another day) is the transmission custom parts using the all audi route, so is there any reason why the porsche turbo gearbox cannot be mated to the Audi engine with the use of an adapter plate like you would do with the chevy engines, then you could use the factory driveshafts and gear linkage to simplify things.
The porsche turbo clutch is 240mm diameter from what i have read, and assuming the Audi flywheel (most likely off a B5 RS4 if going RS6 turbo route) is the same size then you could use the audi pressure plate and the porsche friction plate, or at worst case scenario have a custom flywheel made up to suit the porsche clutch and starter motor.
interested to know if this is a route to consider or am i being a numpty getting carried away with 'thinking' too much.
I like the idea of an Audi engine - either the V8 turbo RS6 or the V10 later one, as i think they are a more refined engine than the LSx ones, and its a bit different which is what building a car is all about.
I appreciate that there are engine/gearbox mounts that will need fabricating - thats a given.
I would of thought that the biggest issue other than the wiring (but thats for another day) is the transmission custom parts using the all audi route, so is there any reason why the porsche turbo gearbox cannot be mated to the Audi engine with the use of an adapter plate like you would do with the chevy engines, then you could use the factory driveshafts and gear linkage to simplify things.
The porsche turbo clutch is 240mm diameter from what i have read, and assuming the Audi flywheel (most likely off a B5 RS4 if going RS6 turbo route) is the same size then you could use the audi pressure plate and the porsche friction plate, or at worst case scenario have a custom flywheel made up to suit the porsche clutch and starter motor.
interested to know if this is a route to consider or am i being a numpty getting carried away with 'thinking' too much.
i was just thinking of the ease of using the factory option for the shifter and the drive hafts, but yes obviously if there is the clutch issue and the expense of the adapter plate it will most likely be 6 and two threes with regards to having custom driveshafts made up, and there will be an off the shelf clutch option.
Theres been plenty of internet threads on people converting V8 RS6 turbo cars to manual using B5 RS4 gearboxes and seem to handle the power into 600+ hp (i know its torque that kills gearboxes but those other cars will clearly have a good dollop of torques too)
with regards to the engine size the V8 RS6 engines are shorter than the LS7 and I've read somewhere, maybe here, that there is even room for the fuel tank between the engine and firewall to the cockpit, and yes the audi gearbox can be made shorter be removing the no longer needed centre diff and blanking it off.
Theres been plenty of internet threads on people converting V8 RS6 turbo cars to manual using B5 RS4 gearboxes and seem to handle the power into 600+ hp (i know its torque that kills gearboxes but those other cars will clearly have a good dollop of torques too)
with regards to the engine size the V8 RS6 engines are shorter than the LS7 and I've read somewhere, maybe here, that there is even room for the fuel tank between the engine and firewall to the cockpit, and yes the audi gearbox can be made shorter be removing the no longer needed centre diff and blanking it off.
ok thanks, just an idea whirling around my head at the moment.
Just seen one site that suggests 'extensive' chassis modifications to fit the RS6 engine, if it is what they suggest and i appreciate everyones idea of extensive will differ but I'm not entirely happy with the idea of extensively modifying a chassis thats had a fair amount of design go into it.
The idea of an Ultima with any powerful engine is an exciting one, i guess i could just wait until I've got the chassis and decide from there what needs doing.
Just seen one site that suggests 'extensive' chassis modifications to fit the RS6 engine, if it is what they suggest and i appreciate everyones idea of extensive will differ but I'm not entirely happy with the idea of extensively modifying a chassis thats had a fair amount of design go into it.
The idea of an Ultima with any powerful engine is an exciting one, i guess i could just wait until I've got the chassis and decide from there what needs doing.
to me though its not about chasing big numbers, Ultima to me is about the fun (and sometimes hell I'm sure) of the build process, ending up with a rare car that will outrun most things on the road and track even with modest numbers, and the non chevy engine route is going to be a more refined car, theres no doubting that the chevy engined cars are massively capable and i would be very happy with one, however if a different engine such as an Audi one for the same or less money - i really dont want to be spending even more, then its something to think about at the very least.
MKnight702 said:
PTO = power take off, drive to the rear wheels.
The V10s are all FSI though.
Edited to add, the C5 RS4 engine isn't as powerful as an LS engine so doesn't make sense from a practical point of view, maybe from a technical point of view it may be nice to have a higher revving euro engine rather than a large capacity lower revving yank motor. Me, I looked at a V10 as the high rev scream of a V10 appealed. However, it was a challenge to fit and similar power can be had much more simply with an LS.
PTO - just involves removing the centre diff off the back of the gearbox and blanking it off surely?The V10s are all FSI though.
Edited to add, the C5 RS4 engine isn't as powerful as an LS engine so doesn't make sense from a practical point of view, maybe from a technical point of view it may be nice to have a higher revving euro engine rather than a large capacity lower revving yank motor. Me, I looked at a V10 as the high rev scream of a V10 appealed. However, it was a challenge to fit and similar power can be had much more simply with an LS.
Edited by MKnight702 on Sunday 5th October 21:10
C5 RS6 are plenty powerful enough, easily remapped to 550hp and thats without going big turbo route, some are running over 800hp, as I've said though for me its not about big figures, 550hp in a car that weighs less than a ton with no driver aids is plenty thanks
good point about the turbo kick but its pretty progressive in a std RS6 V8, i doubt getting it up to 500/550hp will differ too much as the turbos will still be stock so minimal lag.
I know of MRC they are not far from me, and a mate takes his B5 RS4 there from time to time
All fact finding right now, still need to get my head round pumping £70/80k into one car too.
I know of MRC they are not far from me, and a mate takes his B5 RS4 there from time to time
All fact finding right now, still need to get my head round pumping £70/80k into one car too.
can't see as the Audi route would cost any more than an LS7 route and as for resale... who cares, if i were to build one with the Audi engine id do so for my own purpose not to think about the next owner (assuming there would even be one)
lets face it there will come a time where these other engine routes are more common and if they make the same power, make a better noise etc just could be worth the same or more as they are a rarer option.
lets face it there will come a time where these other engine routes are more common and if they make the same power, make a better noise etc just could be worth the same or more as they are a rarer option.
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