Now that I am at my PC I can get more on the topic then using my Blackberry.
I did the DeWitts radiator that is 2x as thick and has 50% more cooling
surface on the engine & transmission oil cooler side. Mr DeWitts told be
that the only way that you will keep the coolant and oil temp down is to
increase air flow through his radiator. In other words, air flow is the
limiting factor if the radiator has the surface area to extract the heat.
The electric fans need to be programmed to come on sooner and stay on high
speed. The air flow is dependent on the restrictions to flow or pressure
drop created by the restrictions.

This is one reason that all race Corvettes have vented hoods to extract hot
air from under the hood and increase air flow that is highly restricted by
the stock air flow path under the car. At speed you have more then enough
inlet air pressure to the radiator but the air needs to escape on the outlet
side.
The dividends with the vented hood are less under hood pressure,
temperature, lift and more down force.
It would be interesting to see if the coolant & oil temperature would
decrease if just a vented hood was installed with a stock radiator. This
would tell you that the cooling capacity of the radiator is the limiting
factor if it dropped a few degrees.

-----Original Message-----
From: RCCTrackers@yahoogroups.com [mailto:RCCTrackers@yahoogroups.com] On
Behalf Of gary@...
Sent: Sunday, February 22, 2009 5:06 AM
To: RCCTrackers@yahoogroups.com
Subject: Re: [RCCTrackers] Re: Hot engine oil temperatures

Pfadt Racing has the best C5 oil cooler. Vented hood also helps
Gary
Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: "mitch-evans" <mitch-evans@...>

Date: Sun, 22 Feb 2009 02:25:42
To: <RCCTrackers@yahoogroups.com>
Subject: [RCCTrackers] Re: Hot engine oil temperatures


Found this link regarding high oil temps:
http://www.z06vette.com/forums/f90/high-oil-temp-trackday-110477/

ME

--- In RCCTrackers@yahoogroups.com, "uvbnzd" <Mike.Je@...> wrote:
>
> Yes, I have a 160 thermostat and the car was tuned by you. I have seen
> the Rippie version and I have also seen aftermarket radiators that
> have engine oil cooling capability. Overpriced for me. However the GM
> automatic radiator is reasonably priced. Have you heard or experienced
> anyone swapping their radiator? My concern is that it may restrict the
> oil flow or reduce pressure. Z06's have a oil delivery problem during
> centrifugal forces and I don't want to make it worse. I've also
> thought of mounting a small cooling fan on the factory oil cooler.
> Where it is located from the factory doesn't allow for any air flow.
> What do you think of this idea? I know your company is very innovative
> and well respected for it's quality workmanship. Your opinion is
> highly regarded.
> Thanks for responding and I'm glad to see you are a member now. If you
> have any other alternative ideas, please pass them on. Or, better yet,
> if you have any specials..............
>
>
>
> --- In RCCTrackers@yahoogroups.com, "g8gt08" <g8gt08@> wrote:
> >
> > Do you have an aftermarket oil cooler system? We use Doug Rippie oil
> > cooler systems on the C5's with good luck, they are pricey though.
> > Also, is your corvette tuned? Do yopu have a low temp thermostat?
> > These things will also aid in having a cooler oil temperature.
> >
> > Mike
> > New Era Performance
> > www.neweraperformanceparts.com
> >
> >
> > --- In RCCTrackers@yahoogroups.com, "uvbnzd" <Mike.Je@> wrote:
> > >
> > > I'm trying to gather information to solve the hot engine oil
> > > temperatures that the C5's and C6's experience on road courses.
> > > On warm days above 80 degrees oil temperatures rise above 280
and in
> > > some cases I'm hearing of over 300 degrees. I know synthetics are
> > > capable of high temps, but this is pretty extreme. I've seen
> > > replacement radiators with engine oil cooling capability, but the
> > > expense is a bit extreme and I am looking for an alternative. Any
> ideas?
> > > Perhaps a GM personnel is out there willing to help. Has anyone
heard
> > > or experienced using a radiator out of an automatic trans Vette and
> > > cooled the engine oil through the trans oil cooler?
> > >
> >
>




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