bhp of your 964
05-04-2010, 09:53 AM
#47
Rennlist Member
I started using my undertray for winter driving, as a bit of experiment. I noted in past winters, without the tray, that on especially cold days my oil temps took a long time to reach the point at which my thermostat would open. I figured this was detrimental to my oil (contaminants, moisture, etc.). After installing the tray, my oil temps climb in a more "normal" time frame as in summer driving, and the thermostat opens and I maintain steady oil temps at around 8 o'clock.
I note that the Scantool can display cylinder head temp real time. It would be interesting to record a trend of cylinder head temp, with and without the tray installed under identical driving conditions.
My tray is coming off now for summer and track time.
Also, re: valve guide wear - I recall reading Joel Rieser's notes and hypothesis that the valve stem seals used on 964 engines were "too good" and did not allow adequate lubrication to the guides, prompting higher wear rates. His suggestion was that installation of earlier spec seals (3.2 ?) would help reduce the wear rate.
My $0.02
I note that the Scantool can display cylinder head temp real time. It would be interesting to record a trend of cylinder head temp, with and without the tray installed under identical driving conditions.
My tray is coming off now for summer and track time.
Also, re: valve guide wear - I recall reading Joel Rieser's notes and hypothesis that the valve stem seals used on 964 engines were "too good" and did not allow adequate lubrication to the guides, prompting higher wear rates. His suggestion was that installation of earlier spec seals (3.2 ?) would help reduce the wear rate.
My $0.02
