identifying an RS2 Exhaust camshaft ?

[PeterS]

How does one identify an RS2 exhaust camshaft if the part numbers 034109022G are difficult if not impossible to see.

Friend bought an RS2 equipped AAN/UrS4
- previous owner claimed that an RS2 exhaust camshaft was installed

Is there a way of comparing the ADU camshaft with a stock AAN one using a caliper?
How would one do that?

thanks in advance!

-Peter

[saltinot]

A quick search yields......THIS

[PeterS]

Tom: that's helpful information, but the problem is that its difficult to read the stamped part number in it's entirety, if not impossible. 034 1xxx xxxxx
If I place an RS2 ADU exhaust cam along side a known AAN one, is there a way of comparing the two using a dial caliper?

[UrS4boy]

20 valve Turbo and non-Turbo Camshaft PNs and Specifications

How does one identify an RS2 exhaust camshaft if the part numbers 034109022G are difficult if not impossible to see. Friend bought an RS2 equipped AAN/UrS4 - previous owner claimed that an RS2 exhaust camshaft was installed. Is there a way of comparing the ADU camshaft with a stock AAN one using a caliper? How would one do that? thanks in advance! -Peter

In addition to the post that Tom S. pointed you to, there is this one that I did based on data presented here (and supplemented by other materials):

http://forums.quattroworld.com/s4s6/msgs/87524.phtml

Measure the lift by measuring the cam lobe with a micrometer at two points 90º to each other (one of them being the lobe "point") and taking the difference.

[turbo20v]

if you still have AAN camshaft compare it with ADU. you will see the difference ( i am spiking from my own experineces and not from theory )

[PeterS]

This is all helpful information, but what would really help is a picture of the part number stamping on the camshaft. All my friend could see was 034 102...
My AAN exhaust cam is stamped 034 102 F

[turbo20v]

i had some issue about 4 years ago. it is almost imposible to read part number. comparing aan vs adu camshafts will be beast option. you could also check camwheel position.....

[PeterS]

so what if you don't have both camshafts in front of you, and given Audi's 9 digit plus letter numbering schema, why just a 6 digit stamp?

[Jamo]

Good luck trying to identify the cam from markings alone BTDT with at least 4 rs2 cams, measure the lobes

[PeterS]

Jamo:
Any advice on how to measure the cam lobes with a vernier caliper?

[UrS4boy]

Jamo:
Any advice on how to measure the cam lobes with a vernier caliper?

Two things:

1. I just checked the AAN exhaust cam that I replaced with an RS2 cam. Then AAN cam is marked "F" like yours.

2. As I said above: "Measure the lift by measuring the cam lobe with a micrometer at two points 90º to each other (one of them being the lobe "point") and taking the difference." I should have said vernier caliper instead of micrometer.

[Kiku]

Didn't see schematics enywhere so maby it helps.
NM (Sauger 160 PS) 034 109 022 B 9,6 mm 34° vUT 3° vOT 034 109 021 AD 9,6 mm 2° nOT 34° nUT
7A (Sauger 170 PS) 54 109 022 10,2 mm 42° vUT 3° vOT 54 109 021 9,6 mm 6° nOT 38° nUT
RR (Turbo 220 PS) 034 109 022 E 8,8 mm 42° vUT 9° vOT 034 109 021 AJ 8,3 mm 2° nOT 25° nUT
3B (Turbo 220 PS) 034 109 022 E 8,8 mm 42° vUT 9° vOT 034 109 021 AJ/AQ 8,3 mm 2° nOT 25° nUT
ABY (Turbo 230 PS) 034 109 022 E 8,8 mm 42° vUT 9° vOT 034 109 021 AP 8,3 mm 2° nOT 25° nUT
AAN (Turbo 230 PS) 034 109 022 E 8,8 mm 42° vUT 9° vOT 034 109 021 AP 8,3 mm 2° nOT 25° nUT
ADU (Turbo 315 PS) 034 109 022 F 9,5 mm 24° vUT 1° nOT 034 109 021 AP 8,3 mm 13° nOT 35° nUT

[UrS4boy]

Didn't see schematics enywhere so maby it helps.
NM (Sauger 160 PS) 034 109 022 B 9,6 mm 34° vUT 3° vOT 034 109 021 AD 9,6 mm 2° nOT 34° nUT
7A (Sauger 170 PS) 54 109 022 10,2 mm 42° vUT 3° vOT 54 109 021 9,6 mm 6° nOT 38° nUT
RR (Turbo 220 PS) 034 109 022 E 8,8 mm 42° vUT 9° vOT 034 109 021 AJ 8,3 mm 2° nOT 25° nUT
3B (Turbo 220 PS) 034 109 022 E 8,8 mm 42° vUT 9° vOT 034 109 021 AJ/AQ 8,3 mm 2° nOT 25° nUT
ABY (Turbo 230 PS) 034 109 022 E 8,8 mm 42° vUT 9° vOT 034 109 021 AP 8,3 mm 2° nOT 25° nUT
AAN (Turbo 230 PS) 034 109 022 E 8,8 mm 42° vUT 9° vOT 034 109 021 AP 8,3 mm 2° nOT 25° nUT
ADU (Turbo 315 PS) 034 109 022 F 9,5 mm 24° vUT 1° nOT 034 109 021 AP 8,3 mm 13° nOT 35° nUT

Is this the same info as in the link I posted above?

http://forums.quattroworld.com/s4s6/msgs/87524.phtml

[Kiku]

Ups, jes. Sorry for not noticing.

[UrS4boy]

Ups, jes. Sorry for not noticing.

No problemo. As long as the data is the same, it is all good.