Good news! The track day went off without a hitch yesterday.
The car felt great overall and it was nice to be back on the track after several months away.
I had no oil pressure issues. Water temp was perfect, right around 185-188*F all day. I still have minor fuel starvation when the tank gets below 3/8s full or so (smaller 318 tank). I will need a surge tank at some point. For now I am just going to keep the tank filled to around 3/4. The breather line on the tranny worked great, and I didn't have any oil seeping down the tranny like last time.
Oil temps averaged 220-225*F. The max I saw was 232*F. Temps would drop back down to 185 during the cool down lap, so idle pressure in the pits was still 27-30psi (as read by my gauge which says 9-10psi when the car is off, so who knows).
My pressure never dropped below 60psi in any corners, even left-handers. The baffle and crank scraper did a good job.
Based on these temps and pressures, I am guessing I can try 5w40 or 10w40 oil next fill? What would the expected changes be, lower pressure (of which I have plenty)? Would it alter the temps much? On the SpecE30 forums I've read that lighter oil in some cases can lower temps since thinner oil sheds heat better.
EDIT: I just popped a new thread for the oil viscosity in the M20 forum. Feel free to reply here or there: http://r3vlimited.com/board/showthread.php?p=4816528
The car felt great overall and it was nice to be back on the track after several months away.
I had no oil pressure issues. Water temp was perfect, right around 185-188*F all day. I still have minor fuel starvation when the tank gets below 3/8s full or so (smaller 318 tank). I will need a surge tank at some point. For now I am just going to keep the tank filled to around 3/4. The breather line on the tranny worked great, and I didn't have any oil seeping down the tranny like last time.
Oil temps averaged 220-225*F. The max I saw was 232*F. Temps would drop back down to 185 during the cool down lap, so idle pressure in the pits was still 27-30psi (as read by my gauge which says 9-10psi when the car is off, so who knows).
My pressure never dropped below 60psi in any corners, even left-handers. The baffle and crank scraper did a good job.
Based on these temps and pressures, I am guessing I can try 5w40 or 10w40 oil next fill? What would the expected changes be, lower pressure (of which I have plenty)? Would it alter the temps much? On the SpecE30 forums I've read that lighter oil in some cases can lower temps since thinner oil sheds heat better.
EDIT: I just popped a new thread for the oil viscosity in the M20 forum. Feel free to reply here or there: http://r3vlimited.com/board/showthread.php?p=4816528
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