Will a B5 Audi S4 engine bolt straight on to my Bora engine bay?

[Louis Ramos]

Hi Folks! Was looking at making my Bora v6 4motion into a turbo. Would an s4 motor off a b5 bolt on with little fuss or would it be easier to just modify the existing 2.8 motor I have into a turbo? Thanks in advance!

Bora_002.jpg

[Eshrules]

General advice is it's easier to sell the current car and buy the one you're trying to make.

Much easier when it comes to dealing with insurance companies and I believe the laws in Australia are far tighter than they are over here in regards to modifications of this nature.

http://www.transport.wa.gov.au/licen...ht-vehicle.asp

It looks like you'd need prior approval (?) for this type of modification so that's something else to consider.

[zollaf]

welcome to the forum. now, a vr6 (what you have) will bolt onto an s4, so the s4 engine would bolt to your box, but i doubt it would fit in your engine bay. the s4 lump is a true v6 with 2 heads, your vr6 is more a straight 6 than a v6. but the vr6 takes very well to turbocharging or even supercharging and the internals can take 400 plus bhp easily. personally i would go down that route, although a vr6 wont ever be as nice as an s4 with k04 hybrid turbos. a friend runs a golf v6 with a blower and that goes well enough.. i think he runs an eaton charger.

[zollaf]

esh replied at the same time as me, so if the rules in oz are that tight, just buy an s4. much easier and you get proper 4wd.

[Louis Ramos]

Rules are pretty good for modifying cars here. As long as the car is safe and road legal then do you what you want pretty much.

[zollaf]

fit a turbo or supercharger then. a supercharger will give less overall grunt, but the power comes in from tickover to the red line. a turbo will boost from about 3-4 k upwards. the s4 lump with 2 small turbos gives boost all the way from nowhere to 7k, best of both worlds.