Audi 2.5 TDI (AKE) -- project -- more power

[011coach]

Hello everybody,

A few months ago I purchased a 2001 Audi A6 Avant quattro 2.5 TDI tiptronic (AKE/FAU) with 155,000+km on the clock. While exiting an off ramp a few nights ago the car lost power and began shaking. I had the car towed to my house where I proceeded to remove the passenger side valve cover only to discover that it had spit a cam follower coupled with severe camshaft wear. I had already known about the camshaft issues with this motor before purchasing the vehicle, however the price was right, and had planned on upgrading/tuning this engine anyway.

After studying the forums, particularly threads and posts by fjtwelve, adamss24, & bigdiffas, I now have a good idea of what tuning route I wanna take. For instance, since I already have to replace the camshafts, I was thinking of upgrading to a roller type head such as a BAU, BDG, or BDH (there might even be others that I'm unaware of).

I would like to get as much reliable power as possible (quattro A6 weighs nearly 2 tons). So for starters, should I just port and polish the AKE heads, stick in a hardened cam and move on to the rest of the project (turbo, nozzles, torque converter, remap, etc.)? Or, find a set of roller heads (although I'm not exactly sure which B-series head to choose.). Also, it's my understanding that an AKE camshaft will fit in the roller heads giving more lift/duration, but not the other way around?

So, for those of you in the "know", would you kindly point me in the right direction?


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[011coach]

ok, haven't touched the car yet as I'm still planning this project...

Since I don't hava a bau,bdg, bdh head to compare; does anyone know if I can just swap in the roller rockers into the ake heads? From what I gathered on etka, the heads appear to be the same casting. The roller heads use 27.2 x 6 x 100.6 intake valves, and 24.1 x 6 x 100.7 exhaust; whereas the AKE uses 27.2 x 6 x 100.5 & 24.1 x 6 x 100.5 respectively. These minute differences fall into what I'd call, approved tolerances. Although , the rollers use 12 x 32.6 hydraulic lifters while the AKE uses 12 x 35's. The latter seems to me like a difference I should pay attention to.

Now, if I was to just swap in the roller rockers (and perhaps the coinciding lifters) in an AKE head with AKE solid cams, would everything fit, or am I way off here?

[amiram]

No. Different cylinder head. Different hydraulic valve lifters Different camshafts. My AKE engine has a BAU heads. You can buy a used BAU Complete engine heads. (I just bought allroad 04 after an accident for 600$)

[ametlib]

If you plan to boost up the engine and also to keep the car for a while, your hardened cam plan is a no go. Audi did put in the best cams money could buy meaning you won't find better camshafts than oem again meaning whatever cams you put in there, they will die . . .
It's a construction issue, go for B heads ( that's what Audi did too )

[amiram]

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[stephenwhite990]

I Have the cam locking tool , injection pump locking pin and crankshaft locking pin which you will need to do the cambelts