I need some info on a 2001 2.8L A4

1. The Compression Ratio

2. Stroke lenght

3. Tolorances of Rods (Horse power limit)

4. Cam Duration

5. Cam Lift

6. Any known fatigue of Head Studs (Under Extreme Conditions such as Boost)

7. Any Known Weaknesses Of the Engine

 

1. The Compression Ratio
10.3:1
2. Stroke lenght
3.40 in. (86.4 mm)

6. Any known fatigue of Head Studs (Under Extreme Conditions such as Boost)
Should be fine around 10psi if you plan on supercharging, I would check out the website (something along the lines of superchargedaudi) if its still around

 

cam duration:

intake = 210 degrees
exhaust = 226

valve lift = 8.8mm

im not entirely sure on the HP limit of the 30v.. all i know is that ~10-11 psi out of a G2 is the max it will handle. rods get thown there

as for weaknesses of the motor. the main reason that the 30v 2.8 motor is not recomended for boost applications, is well, it wasn't designed for it..

2.8 motor = Aluminum block and 2 bolt mains

2.7t motor = iron block and4 bolt mains..

the 2.8 motor is just not built for big power. you're much better building up a spare 2.7t block w/2.8 heads and swapping that in..(this is all assuming you're going for 400+Awhp)