One more thread on an oil cooler mod

[Kyler]

final fit after header was rerouted. I had to add an extra 2.5-liters of oil. That gives this thing a huge oil capacity.

I started it and ran it for almost 20-minutes with a 20" fan blowing on the motor. I got 40# oil pressure at idle. Mild revs easily got the oil pressure up to 70-80#. I haven't downloaded the data for the guage yet so don't know how hot it got.

I'm off to Loudon this weekend to race. Will let you know what the data says after practices and 2 races.

[Kyler]

for those interested, we went to Loudon to race over the weekend. Three races and three practice sessions - cooler worked fine. The pyrometer showed 200 degrees on the cooler (the bars on the temp gauge are hard to read) after each session. Does anyone have hard facts on what the high end of the oil temperature should be? I'm wondering if maybe it isn't running a bit cool.

Oil pressure was a pretty constant 60-70# even pulling hard down the straight at 9K RPM.

Next on the list is to add a top-end oiler and I think I'll be fine.

[hotrods316]

is there any reason you went with this type of set-up vs. the one described on the flying bananna? (the oil cooler that comes out of the stock pressure sending unit?

PS- is there hack racing at the vintage days at mid-ohio? would love to check out this beast in person

[Kyler]

is there any reason you went with this type of set-up vs. the one described on the flying bananna? (the oil cooler that comes out of the stock pressure sending unit?

PS- is there hack racing at the vintage days at mid-ohio? would love to check out this beast in person

Yes, the vintage guys will be at Mid-O. I have a conflicting race or I would be there too. I'll be in NJ at the NJMP that weekend.

This motor does not have the oil galleries that he has. Plus, this motor is a 16-valve so the oil-pressure switch is in the oil filter cover. This mod is as close as you can get to what he did with this particular model motor.

So far it is working well. I have over 6 hours on it in race conditions with the RPM limiter set at 9K.

[Kyler]

I now have just shy of 9-hours on this mod in race conditions. It works well. The motor is putting out a solid 60# pressure at race speeds and 40# at idle. Temps have stayed in the 200-230 range (using a pyrometer on the oil cooler at the end of a race).

[GregT]

for those interested, we went to Loudon to race over the weekend. Three races and three practice sessions - cooler worked fine. The pyrometer showed 200 degrees on the cooler (the bars on the temp gauge are hard to read) after each session. Does anyone have hard facts on what the high end of the oil temperature should be? I'm wondering if maybe it isn't running a bit cool.

Oil pressure was a pretty constant 60-70# even pulling hard down the straight at 9K RPM.

Next on the list is to add a top-end oiler and I think I'll be fine.

I'm more used to seeing oil temp in deg C. 100C is too hot, most semi and full synthetics begin failure around 95C in my experience. 80 - 85 C is the range I'm happiest with. On that basis you may be a tad hot but you really need to measure the oil temp rather than the cooler temp..
Given short races and frequent changes you may get away with what you've got. A number of the top outfits here besides being water cooled, are on methanol which sidesteps the cooling issue totally.

[boingk]

200'F is about 90'C, and 230'F is 110'C.

Not bad range given the period of the engine and its use, I think.

- boingk

[Kyler]

thanks guys! Over the winter I'm installing a better oil temperature gauge that gives me a number versus a "band". Then I'll have hard data.