Before we begin, I have read tonnes of threads on the SAMBA relating to my problem, followed all the advice and not made any progress.
Here is what i have in my split bus.
New 2180 cc low compression, built by myself full flowed with external cooler/electric fan. FK41 low end torque cam/ 1.4:1 rockers.
Not running lean, timed to 28 degrees max advance, dual 40 weber clones.
J tubes with industrial tins, hoover bit, all factory tin, with the doghouse shroud modified by slicing the ends off to clear the carbs and welded shut again. Ive run it with the snorkels removed and filled and also with the Jake Raby recommended 1 1/2" holes in the shroud.
Ive used a 30mm oil pump and a 21 mm oil pump with no difference in temperature, just lower pressure with the 21.
I'm running a mechanical pressure gauge from the stock oil pressure switch location and the temperature gauge in the type 3 dipstick blanking plate. Temp checks out with an infra red heat gun.
I've tried 15W40 oil and then 5W20 oil.
The Bob hoover oiling mods have been done as well as the piston squirter grooves cut into the rods (which will raise oil temp I know.)
Ive tried a shorter belt with more pulley spacers to speed the fan up but not a 356 pulley. I have the correct 35mm fan,
I can drive at 50MPH on an 80 degree day and have oil temp of 125 C ( 250 F ish). I live at the top of a 2500 ft climb and have to stop halfway up to cool down. The same bus with a 1600 dual port, reduction boxes and stock size tiresmade it up fine.
I have an its in there now with 195/50/15 rear tires.
I've driven air cooled VW's for 20 years so this isn't my first rodeo but it is my first big motor.
What have I missed?
?? Any input is gratefully received.