Re the loom conversion, it should just be a case of soldering on the appropriate plugs so it will plug into your existing loom, and removing any extra connectors like those for the autobox.
That is quite pricey, who was it that quoted that much? Remember that the V8 conversion would be faster than an S4 too, your up 80hp and down 200kgs over an S4.
Also see if theres any major difference between the S8 and A8 engines on pricing, as they will often base the premium on the donor car, and an S8 will be more expensive to insure than a A8 i'd imagine?
V8 conversion all in sourcing the engine and everything needed from A8 parts, Siena and ebay plus a quote on the 200 cell cats with exhaust fab came to £2000 all in if you do it yourself.
It broke my budget of £1200 so i didnt go ahead but thats not alot of ££ for 340+ bhp
My insurance currently stands at £322 fully comp, with an agreed value policy, and all modifications declared. I sent copies of invoices for all the RS4 body conversion, as well as pictures.
I got a quote last week, for the above, but with S8 motor and 2001 S4 6-ratio tranny, and it came to £463.
There are advantages of being older, and having an unblemished driving history. I passed my test April 1988, and have never had points.
If I did need more power!?!?!?!? I could always stick the S8 cams in easy enough I suppose.
The engine will fit the 'box, Siena has a contact for the flywheels IIRC And tbh you prob just convert to electric fans to overcome the space problem ( assuming there is one)
Or jus go GT30rs or summat instead
So I'd need a way of controlling the fans then as I assume the A8 ECU wouldn't be equipped for this?
Siena- Didn't you have an issue with the timing sensor when you fitted the new flywheel.. too many teeth or something? How would I get around this with the standard A8 ECU?
Not too many teeth - the teeth were fine, just the timing pulse ring was in a different place to the 6-speed box I'm using.
That's since been rectified.