wheel question

[K Simmonds]

Your right in sense that just about any longitudinal mounted Audi gearbox will mate to any engine, however it's not quite as simple as that, some holes may need to be opened up, location dowels moved about and bolt lengths adjusted.

Then when it comes to drive train I'd leave that alone, fitting a B4/5 rear diff to a B3 platform car (which all 1987-1996 Coupes are) would be a real headache and as nice as it is having six gears I actually prefer the old five speed in my S2 over the six speed in my RS2. Sure the six speed is much, much stronger but they all seem to suffer from a slightly notchy feel compared the five speed, especially between first and second gear.

If the compression is dropped on the AAH engine (I'd do it with custom rods) then with suitable engine management and fuel delivery 300BHP should be achievable with right type of charger, the Vortech units get really good result's on VR6 engines and give power figures in this range.

[sixaxles]

Originally Posted by K Simmonds

Your right in sense that just about any longitudinal mounted Audi gearbox will mate to any engine, however it's not quite as simple as that, some holes may need to be opened up, location dowels moved about and bolt lengths adjusted.

Then when it comes to drive train I'd leave that alone, fitting a B4/5 rear diff to a B3 platform car (which all 1987-1996 Coupes are) would be a real headache and as nice as it is having six gears I actually prefer the old five speed in my S2 over the six speed in my RS2. Sure the six speed is much, much stronger but they all seem to suffer from a slightly notchy feel compared the five speed, especially between first and second gear.

If the compression is dropped on the AAH engine (I'd do it with custom rods) then with suitable engine management and fuel delivery 300BHP should be achievable with right type of charger, the Vortech units get really good result's on VR6 engines and give power figures in this range.

i could live with 300bhp, its more than enough if its only a bit of fast road driving, definately enough to catch nob heads out that try beating you round a roundabout in the wrong lane...... this is a serious pet hate of mine and sadly is common place in scunthorpe
ive only seen a few supercharged and they seam to mount the charger where the air box is?

[K Simmonds]

I know what you mean about rounderbout walkers, I use take great delight in absolutely annihilating them in my 1300kg 380bhp S2, not many cars could keep with that thing, certainly embarrassed a few chavs as well people in £100K sports cars. My RS2 is nearly as quick but it's got quite a big K26/7 so takes a few more RPM to come on to boost and is full weight, still it handles much better than an S2 Coupe which kinda evens things out...

I've been quietly researching ways of boosting the AAH engine as that's what in my C4 Avant quattro which may get upgraded down the line...

Am about to help my mother with her shopping but will be back online later...

[sixaxles]

[sixaxles]

i ordered my wheels today

[K Simmonds]

Originally Posted by sixaxles

i ordered my wheels today

Sorry if i missed it but what design wheel did you go for in the end? Bet your looking forward to getting them!

Right... On to boosting an AAH, unfortunately as they're not as common as the VR6 motor there isn't anywhere in the UK offering either turbo or supercharger packages for our engines so we have to work it out for our self's. There were a couple of company's in states offering such upgrades but they don't seem to be available any longer.

One modern advance that makes life a little easier is affordable after market ECU's, it's still a major out lay but is essential, the factory V6 ECU was never designed to handle positive inlet pressure, only vacuum, so it simply isn't built for handling a charger. Max ECU seems to be very good value and then of course there's good old VEMS and of course there are other options. Then you either have to learn how map a car or find a tuner to do it for you, I like to learn how to do everything myself so would opt for the former.

The Vortech superchargers seem to give the most bang for buck and it would need to be mounted so the pulley is inline with the rest of the other pulleys, the air-box side of the engine has the most space so that area would make sense...

Or you could go for turbocharging which will give even more power as their considerably more efficient than superchargers, there's just enough space behind the motor to squeeze one in there but it would mean a lot of custom work with the exhaust as well as intake pipe work. Or you can go for a remote turbo and fit one under the car, say where the Cat currently lives, still a lot of work.

The compression of the engine will need to be lowered, this can be done a couple of ways, thicker head gaskets or different con-rods are the two best options.

Either option is going to add up to a major outlay even if your capable of doing a lot of the work yourself but would be a lot of fun once complete...

A cheaper option if your just after short boosts in power is good old Nitrous Oxide, that can be done with a stock ECU and won't cost anything like as much but will only give really quite short increases in power. it also won't give as much outright power as either way of boosting an engine, I'd expect no more than 250bhp and that may even be pushing it a bit far.

So if you've already got a 2.7 Turbo engine making that fit will cost less than either of the other options, that could be modified to use one turbo behind the engine as well which is another way of getting around making the stock set up fit in a B3/4 engine bay.

The AAH engine itself can be made to go a little better by modifying the inlet, and they should go pretty well anyway if there's no vacuum leaks which they are very prone to.

[sixaxles]

I’m going to keep the wheels to myself just now until
I’ve got them on in some sort of form as I do think they’ll be a bit of a marmite choice for a lot of people, they weren’t my first choice but I think they’ll look quite good when everything is done snd the car is painted …… I’m going to buy two tyres for now so I can check the fit on the front and rear axles without splashing out for four tyres in a oner- things in the wallet department are getting a bit out of control , although I didn’t think the price of the tyres was too bad , the most expensive choice being 129 each.
I like the idea of turbo charging the current engine, I’ve just looked on eBay to see if there’s a second hand aah to start the process but no such luck ….. or maybe it is lucky as that’s just bending the budget even more lol
Was hoping to get home today before the powder Coaters go home, all repair work to the rear subframe is now done, it just needs dropping back in

[Obli]

If / when you're ready to show your wheels, post up and get the thread closed instantly so us miserable old buggers can't ruin your evening

[sinbin5t]

Originally Posted by Obli

If / when you're ready to show your wheels, post up and get the thread closed instantly so us miserable old buggers can't ruin your evening

He is right in what he says

[sixaxles]

Originally Posted by sinbin5t

He is right in what he says

i already know