I tried "generic" ducting (mocal) but I didn't see any improvement
I was thinking of making something out of aluminum that was better flowing + more exact fitting. Maybe design will be the difference in this scenario. I'll give'r a go.
now, in terms of the right oil for the situation - I think I've reached a new understanding.....
after staring at multiple data sheets for a longass time..... I've realized the weight that's labelled on the bottle actually means very little- the data sheets are what everyone should be looking at. The intended purpose of the oil and it's corresponding additives package makes all the difference and a basic weight # doesn't tell the whole story. (For example compare Amsoil 15w50 with Schaeffer 5w50 below - when cold the 15w# from the Amsoil should be much thicker than the Schaeffer 5w# right? But in this case it's the other way around...... - so no one should judge an oil just by the weight # on the box - you've gotta look at the stats behind the weights)
if I'm understanding everything correctly - basically- in my situation:
I need to find an oil that has a lower viscosity at & above operating temps to bring the oil pressures down (while keeping them stable), yet still have a high enough flash point & HTHS to keep up at higher operating temps during racing / high RPM conditions. Also a lower viscosity at startup would aid in cold start wear - it would be nice to have, but this isn't the priority. (There are many other things to consider, but I'm trying to keep this relatively simple.)
As a result I'm looking at the following:
Amsoil 15w50 Dominator Racing Synthetic
viscosity @ 40 = 126.3
viscosity @ 100 = 18
flash point = 238
HTHS = 5.6
Schaeffer Supreme 9000 5w50 Racing Oil
viscosity @ 40 = 146.87
viscosity @ 100 = 20.24
flash point = 226
HTHS = 5.08
Motul 5w50 sport
viscosity @ 40 = 107.1
viscosity @ 100 = 17.9
flash point = 244
HTHS = 4.5
Motul 300v Power 5w40
viscosity @ 40 = 81.8
viscosity @100 = 13.6
flash point = 230
HTHS = 4.1
for reference here are the stats that I could find on the 10w60 I'm currently using (I like everything about it except for the high oil pressures), and the 5w40 I was experiencing problems with previously. Just by looking at the data sheets I can see why the 10w60 performs better than the 5w40, why the consumption is lower, why the pressures are more stable at high temps, and also why the pressures are higher. While the Synthoil 5w40 I was using before is a great street oil, it just isn't a race oil..... it wasn't made for that purpose at all. The 10w60 on the other hand is definitely a race oil, but it's a bit too thick at running temps for my application. So now - I've gotta find something in the middle.
Liqui Moly 10w60 GT1 Race Tech
viscosity @ 40 = 155
viscosity @ 100 = 23.8
flash point = 240
HTHS = ??
evap loss = 6.5%
sulfate ash = 1.2/100g
Liqui Moly 5w40 Synthoil High Tech
viscosity @ 40 = 88.5
viscosity @ 100 = 14.5
flash point = 230
HTHS = 3.5
evap loss = 9.5%
sulfate ash = 1.2/100g
which one would you choose? I'm kinda leaning towards the Amsoil..... the Motul 5w50 looks great too but it's harder to come by where I live and (believe it or not) more expensive than the Amsoil.
if you like other 50w (or high performing 40w) please post them up and list at the minimum their viscosity @ 40 & 100c, flash point, and HTHS. If you want to add more info feel free to do so.