Re: WOT Tuning
 

Another little know reality is the worthlessness of the oil cooler system. There is a thermostat like device that prevents any meaningfull oil being circulated through the cooler until the oil gets to over 240+ deg. by then it is really too late to help. So if you are looking to address cooling the oil you have to do something about this 'thermostat' first.

Tyler

Re: WOT Tuning
 

Tyler,

Please keep those little nuggets coming. =D>

Re: WOT Tuning
 

how would one change the opening temp of the thermastate (oil)

Re: WOT Tuning
 

Tyler,

What if the oil thermostate was removed, would that be too much cooling? As prviouly asked how can the opening temperature be changed?

Thanks,
Jerry
93 White ZR1

Re: WOT Tuning
 

If you remove the water t stat the water will not be in the radiator long enough to cool thats why you cut the spring and leave it in the system. The only down side is that when the outside temp is below about 65 deg the system runs so cool that it never goes into closed loop. Lane kept a piece of cardboard to block the radiator when it was too cold.

I know of no one that has removed the 'oil temperature control valve'. If you look in the service manual 6A2-37 at the breakout for the oil filter housing you can see its location. I have a email to Geoff about where get different value valves. It looks to me that one should be able to replace it without too much trouble.

Tyler

Re: WOT Tuning
 

Per Geoff Jeal ex Lotus calibrations engineer for the LT 5 engine.

Quote

As far as I know there is no alternative wax capsule for this application, you can however remove the wax stat and jack the shuttle valve open. This is how all of the dyno engines were run during development.

Unquote.

Tyler

Re: WOT Tuning
 

Tyler,

Thanks for posting the reply from Geoff. Any thoughts on what the oil temp would be if the valve was open all the time. Past posts stated that we don't have a problem with oil temp unless it's 300F, that temp troubles me. I have a Ron Davis Rad. with a 180F thermo., when doing track events at both Portland and Thunder Hill in Northern Ca. my oil temp will go to 240-250F when the car is being pushed, I back off when I see 250F. I still would like the oil cooler in the loop at all times. Am I being too conservative?

Thanks again,
Jerry

Re: WOT Tuning
 

Do not know anyone who has done the mod but if they were doing it on the dyno motors it must have helped stabilize the temp where the wanted it to be. If your oil is going that high your water must be really hot. Not sure what the stock oil cooling system would do after doing the above but if I went to the trouble to mod it as above I would add a cooler rather than use the stock setup unless you do the bypass mod above. In stock form the water temps are still high and since the oil cooling is so close to the radiator I would be concerned that it is not getting as cool as needed.

Tyler

Re: WOT Tuning
 

Best solution then would be to eliminate the thermostat. I've done that in the race car, but it does not see much cold temp operation unless it's a nice day and i take it out on the streets to cycle everything. But I let it get real hot by cutting off the cooling fans.

Re: WOT Tuning
 

So I have a question? In the winter when air cooling is at its max, the temp should hover around where the thermostat device opens, right? My car in the winter will generally have an oil temp around 180-185F in street driving. I assumed from that that the oil thermostat begins circulating oil at that point? Am I thinking about it wrong?