jimmerp

Anyone have lobe centerlines for the stock 2.5 litre 16v? Preferably ones confirmed with a degree wheel..

michaelmount123

They are in the Tech Spec Book (small one), but you have to do the math since they only provide opening and closing points at 1mm lift.

944S
Intake is 112 deg. AT
Exhaust is 110 deg. BT

jimmerp

Thank you M.M. I was hoping you would chime in.
I belive I have this page in a pdf copy of the manual. Shows the cam Part numbers for both 2.5 and 3.0 litre and the opening and closing for each. 2.5 reads 4atdc, 36 abdc for the intake. I did the math and got those same numbers then set my timing..
What got me asking was reading the pages for setting the timing with a pair of dial indicators. It specifies 1.4mm lift @ tdc. That doesnt seem right if it has 1mm lift @ 4atdc .....Am I missing something?Or has something been lost in translation.

michaelmount123

Hmmmm. I wonder if it is a translation error. If the 944S intake opening was 4 CA before TDC, the comparison to the timing set-up spec of 1.4mm at TDC would make sense. It would also make the intake duration similar to the S2, but with its timing advanced. Good catch!

Oh, and if this is true, the 944S Intake Centerline would be 108 degrees ATDC.