S4 K04 Conversion

[Joshie]

Another couple of points Ian, did you notice at any time at all that these turbos were so hot ie oil temp?. Would a turbo timer have helped in this case, as I know the K04's can suffer considerable damage on hot shutdown, and I've done this on several occasions without thinking [img]images/graemlins/blush.gif[/img] - been very lucky so far [img]images/graemlins/wink.gif[/img]

Andiroo

This was the first comment from Turbo Dynamics when they examined the second set of knackered turbos - ie was the car left to idle after a long run? The answer is that as far as possible yes - but I'd challenge anyone who stated that in every instance thay allowed the car to idle for 3 -5 minutes after every run.

Turbo timer would have helped. I would have surely had one fitted if I had kept the car. Again I think it is another example of what is good about hindsight.
If AmD had recommended a TT when I had the KO4's fitted I would have taken that advice. Most sensible people would. But this was never recommended, and I believe it should have been.

Thats hindsight for you [img]images/graemlins/wink.gif[/img]

[DavidT]

Re: Intercoolers S4 vs Rs4

I would hazard a guess at 12bhp and around 18nM both at peak. Would most definitely show an improvement on a RR with like for like atmospheric conditions against OEM IC's

Thanks guys.

What about front mounted intercoolers ?

ACH do one, Josh has posted on here and I have asked them for info on the benefits but all I have had so far is 'big'. I think AWE are planning one too.

Do we have any info on what difference any FMIC would make ?

[Dippy]

Dave, wouldn't yours be cheaper because you already have the full Miltek exhaust ?

Yes it would, but whilst the engine was out I'd be tempted to get new ICs, light flywheel, new clutch, and maybe even uprated manifolds (if available). So it'd end up as even more costly!

[Dippy]

I must admit the addition of RS4 intercoolers should have shown a decent improvement [img]images/graemlins/confused.gif[/img]

Andiroo

Only if the conditions were appropriate, which often for a RR they are not (i.e. inadequate fan).

[Dippy]

but I'd challenge anyone who stated that in every instance thay allowed the car to idle for 3 -5 minutes after every run.

Challenge accepted: My turbo timer is currently set to 5 minutes.

However it's the failure to observe the warm-up time that can be far more damaging to turbos than the cool-down time.

[Andiroo]

My personal view on a FMIC is if you fit one, giving approx 90% EXTRA volume (!!!), and get rid of (ie new custom engine management and or replace with something more efficient) the MAF and it's limitations then you can expect huge power. Subject to adequate injectors and fuel pump, and notwithstanding what the rods and pistons can take, then you can really advance the timing (=big bhp) and furthermore start increasing boost to over 2Bar without causing damage.

So an S4 with a hybrid turbo setup (not K04's), FMIC, gaslflowed manifold and head, adequate fuelling, non MAF (or replaced), harder rods, ceramic coated pistons and manifold, with say a 12point advance in ignition and running 2Bar boost on Optimax and millers only, would easily be good for 480 to 500bhp maybe more, and would be reliable as well [img]images/graemlins/laugh.gif[/img] ......... not forgetting the turbo timer which is a must for both me and Joshie [img]images/graemlins/wink.gif[/img]

Andiroo

[Dippy]

Andiroo,

Stop pissing about and get a JATO mate. [img]images/graemlins/grin.gif[/img]

[Joshie]

Challenge accepted: My turbo timer is currently set to 5 minutes.

Not exactly what I meant - notwithstanding a turbo timer (which isn't quite the same as letting the engine idle, oops don't want to get into that debate tonight)I was actually talking about sitting outside your gaff with a stopwatch in one hand and your family asking you if everything is OK and if you are in need of immediate psychiatric assistance.

Hardly what I would call trouble free motoring, is it? [img]images/graemlins/smirk.gif[/img]

[DavidT]

I can't afford even to read this stuff [img]images/graemlins/blush.gif[/img]

[Andiroo]

Accept your points about the turbo timer Dave - I think these are a must have and still can't believe I haven't got round to fitting one [img]images/graemlins/confused.gif[/img] Also the warm up is a rule I do stick to even on trackdays with a warm up lap every time - although I do notice not all our brethren abiding by this [img]images/graemlins/frown.gif[/img]

My points re the IC's however did point out a deffo improvement in like for like RR atmosheric conditions. I totally agree that it's pointless comparing results from a RR whose readings are affected by the daily ambient.

Andiroo

[Andiroo]

JATO? is that like a little staff member who jumps out at you doing karate stuff when you least expect it [img]images/graemlins/tongue.gif[/img]

Seriously, JATO?

Andiroo

[Dippy]

Not exactly what I meant

I knew what you meant...you're being far too serious for a Friday midnight.


Yes Andi, why not? Maybe you could get to Mach 2 on the track?

[Joshie]

I knew what you meant...you're being far too serious for a Friday midnight.

That's because I've been on the wagon all week while you've probably been out on the piss [img]images/graemlins/wink.gif[/img] [img]images/graemlins/roflmao.gif[/img]

[Ozz]

David, you can put monifolds and warm side K04 from RS4 and cold side K04 from Audi TT 225 HP (bigger than rs4 cold side). I've got that kit in my RS4, works perfectly. Engine management is Unichip with 1.55 bar (air pressure). But it is still a soft tuning - for some fun only. I use RS4 day by day as a family car [img]images/graemlins/burnout.gif[/img]
Costs in Poland:
900 USD - Unichip or something special [img]images/graemlins/smile.gif[/img]
2500 USD - turbo config. kit, downpipes etc
Let's go to Poland, VTG team needs 3-4 days to make your car. [img]images/graemlins/thumb.gif[/img]

You can read about my second car - s4 1/4 mile project (by VTG).

[smurfbus]

Hi Ozz

What would you estimate the cost would be for install of k04 (hybrids?) + unichip for 98 S4? I already have full exhaust.

I've been watching you guys (VTG) and you seem to make good work with Audis! I'm from Finland so this is not the easiest option but tempting anyway.

Your video is sic! [img]images/graemlins/bowdown.gif[/img] Have you tried stiffer suspension?