Hi everyone,
I was searching a lot to find some information about cam timing of different variation of those engine - unfortunately without success.
Can you share some figures if you find it somewhere?
Until now I know, there is slight difference in exahust cam profile for 2nd generation 1.8tfsi and 2.0tfsi (without AVS) engines. Intake camshaft looks to be the same (still there is different part number also for intake cam).
The only confirmed information I found was regarding exhaust cam in 2.0TFSI with AVS (SSP 922903 page 12).
Small lobe have lift of 6.35mm, duration of 180°, exhaust valve open 2° ABDC, and closes 2° ATDC;
Big lobe have lift of 10mm, duration of 215°, exhaust valve open 43° BBDC, and closes 8° BTDC.
For gen3.b (AVS also for intake) engines I found quite insufficient info (SSP 645 page 24-25).
Small intake lobe have duration of 140°, while big one have 170°.
MAYBE large lobe (or maybe gen3) close intake valve 20 degrees BBDC, so intake should open 10 degrees BTDC (if it is really for big lobe of gen3.b engine).
Small lobe closes intake valves 70 degrees BBDC, so intake should be opened 30 degrees BTDC
I think all Audi stated numbers are at 1mm valve lift.
According
dbilas site for road application they offer cams with valve lift 11.4/10mm and duration 256°/248° (I think this is total duration at 0.1mm valve lift) - those offering is for gen2 engine, so It should be slightly more lift/duration compared to stock cams. I think dbilas exhaust profile is very close to big lobe profile of 2.0TFSI with AVS but with different centerline.
Unfortunately I didn't find any info for gen2 without AVS cam profiles, neither for intake cam of every EA888 before gen3.b
Can you help to gather some info here, so everyone can see it on one place.
Update:
I found some information about EA113 2.0T:
Intake camshaft have duration of 190° and lift 10.7mm. Intake valves open (1mm lift) @28° ATDC in fully retarded position of the camshaft, so they close at 38° ABDC. EA113 VVT have 42° range;
Exhaust cam have duration of 200° and lift 10mm. Exhaust valves open (1mm lift) @28° BBDC and close 8° BTDC
As a matter of fact this is exactly as 1.8T cam durations. I was wondering if EA888 figures could be pretty close to those too.
Another thing that bothers me much - why in 1.8TFSI files max retard position is 38°, and in 2.0TFSI files it is 28°. It seems that 1.8 and 2.0 cams should have 10° difference in centerlines, but to me they both looks exactly the same - no difference in lobes, neither in a position of VVT.