[hgerhardt]

Originally Posted by lust4speed

Keeping the oil warm (over 212°) and the coolant cool is going to produce a happy engine.... During the cooler weather the oil just wasn't getting warm enough to purge the moisture.....

And that's why I love oil-to-water coolers like they used on 4th gen TA's with manual trans and C4 Corvettes.

On a cold start, the water heats faster than the oil which causes the cooler to actually warm the oil. After warmup, it's the opposite situation.

Below is the setup on my '66 GTO. It's a C4 Corvette unit (made by Modine) attached to a 90deg adapter via a simple adapter plate on a Firebird long-branch adapter. The hoses connect to the heater nipple on the RH head (although mine takes water from both heads) and then to the heater core. The switch (used to) control the electric fuel pump and also turn on an oil pressure idiot light (with rally gauges and solid rollers, you can't hear/easily notice if there's low oil pressure). This cooler also allows (forces?) the use of SBC oil filters. Unfortunately, with Doug's headers I have to use a shorter filter than that PF-35L (it worked well with H-O Racing's Tri-Y headers). If you want a CAD file of the adapter plate, shoot me a PM.

[Skip Fix]

Originally Posted by hgerhardt

And that's why I love oil-to-water coolers like they used on 4th gen TA's with manual trans and C4 Corvettes.

On a cold start, the water heats faster than the oil which causes the cooler to actually warm the oil. After warmup, it's the opposite situation.

Below is the setup on my '66 GTO. It's a C4 Corvette unit (made by Modine) attached to a 90deg adapter via a simple adapter plate on a Firebird long-branch adapter. The hoses connect to the heater nipple on the RH head (although mine takes water from both heads) and then to the heater core. The switch (used to) control the electric fuel pump and also turn on an oil pressure idiot light (with rally gauges and solid rollers, you can't hear/easily notice if there's low oil pressure). This cooler also allows (forces?) the use of SBC oil filters. Unfortunately, with Doug's headers I have to use a shorter filter than that PF-35L (it worked well with H-O Racing's Tri-Y headers). If you want a CAD file of the adapter plate, shoot me a PM.

The late 90s Chevy trucks with a towing package had a similar oil cooler. At least my 97 sure does.

[Formulajones]

Originally Posted by Skip Fix

The late 90s Chevy trucks with a towing package had a similar oil cooler. At least my 97 sure does.

Yep Skip, GM had it in the 80's too. My 88 Iroc Z 350 TPI had one just like that.

[Nicks67GTO]

Originally Posted by hgerhardt

And that's why I love oil-to-water coolers like they used on 4th gen TA's with manual trans and C4 Corvettes.



On a cold start, the water heats faster than the oil which causes the cooler to actually warm the oil. After warmup, it's the opposite situation.



Below is the setup on my '66 GTO. It's a C4 Corvette unit (made by Modine) attached to a 90deg adapter via a simple adapter plate on a Firebird long-branch adapter. The hoses connect to the heater nipple on the RH head (although mine takes water from both heads) and then to the heater core. The switch (used to) control the electric fuel pump and also turn on an oil pressure idiot light (with rally gauges and solid rollers, you can't hear/easily notice if there's low oil pressure). This cooler also allows (forces?) the use of SBC oil filters. Unfortunately, with Doug's headers I have to use a shorter filter than that PF-35L (it worked well with H-O Racing's Tri-Y headers). If you want a CAD file of the adapter plate, shoot me a PM.

Tell me more. I'll definately take a copy of that cad file if you're offering. Does this interfere with the bell housing or headers at all? Do you have any pics of it installed? I added an oil temp gauge to my speedhut cluster this year and I'm going to monitor it closely while racing. I ran a hill climb with my 67 gto last year where revs were 4-6500 rpm for a lot of it and I think my oil was getting hot.

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[bendutro]

Originally Posted by Nicks67GTO

I ran a hill climb with my 67 gto last year where revs were 4-6500 rpm for a lot of it and I think my oil was getting hot.

Was pressure dropping? Are you running 3" or 3.25" mains? I ask because I talked to Don Stellhorn about his issues and it sounded like sustained rpm and high bearing speeds resulted in spun bearings more than once so he hit the LS button and didn't look back.

I'm building mine for similar duty, hope to run into you one of these days once she's finished!

[Nicks67GTO]

Originally Posted by bendutro

Was pressure dropping? Are you running 3" or 3.25" mains? I ask because I talked to Don Stellhorn about his issues and it sounded like sustained rpm and high bearing speeds resulted in spun bearings more than once so he hit the LS button and didn't look back.



I'm building mine for similar duty, hope to run into you one of these days once she's finished!

3" main, 4" stroke. The idle oil pressure was down 5-7 lbs over hot idle after the run. Shut it down back in the paddock and let it cool down and it was no big deal. Pressure was back to normal. Then I drove it home 3.5 hrs. No issues. Just seemed like it got warm and thin.

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[Formulajones]

That doesn't seem like a big drop in hot pressure after a hard run to me Nick.

You could likely and very simply just change oil brand or viscosity of the oil and see those minor pressure differences change. 5-7 lbs. change when hot wouldn't bother me, as long as your hot idle pressure isn't ridiculously low to begin with.

I used to run VR1 20-50, and I would see hot idle pressure drops that you mention just from a 20 mile highway cruise at 3,000 rpm, and would consider that pretty normal. Switched to Amsoil 20-50 many years ago and haven't really noticed any pressure drop hot or cold which leads me to believe (and it's been mentioned to me before) that this oil is likely holding it's viscosity better.

[Nicks67GTO]

Originally Posted by Formulajones

That doesn't seem like a big drop in hot pressure after a hard run to me Nick.

You could likely and very simply just change oil brand or viscosity of the oil and see those minor pressure differences change. 5-7 lbs. change when hot wouldn't bother me, as long as your hot idle pressure isn't ridiculously low to begin with.

I used to run VR1 20-50, and I would see hot idle pressure drops that you mention just from a 20 mile highway cruise at 3,000 rpm, and would consider that pretty normal. Switched to Amsoil 20-50 many years ago and haven't really noticed any pressure drop hot or cold which leads me to believe (and it's been mentioned to me before) that this oil is likely holding it's viscosity better.

Running Brad Penn 10/40 with zddp for my SFT cam. I think that's top end stuff... right?

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[Formulajones]

Originally Posted by Nicks67GTO

Running Brad Penn 10/40 with zddp for my SFT cam. I think that's top end stuff... right?

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Brad Penn makes an excellent oil.

Wonder how hot you were getting it...

[azbirds]

[QUOTE=bendutro;5991827] I ask because I talked to Don Stellhorn about his issues and it sounded like sustained rpm and high bearing speeds resulted in spun bearings more than once so he hit the LS button and didn't look back.

Just wondering about the rest of the story. What kind of rotating assembly did this guy saddle his Pontiac engine with? Did he run a three stage dry sump system like his ls3 has? Was he spinning main bearings or rod bearings? IMHO hitting the "ls button" is a cop out.

[hgerhardt]

Originally Posted by Nicks67GTO

Tell me more. I'll definitely take a copy of that cad file if you're offering. Does this interfere with the bell housing or headers at all? Do you have any pics of it installed? I added an oil temp gauge to my speedhut cluster this year and I'm going to monitor it closely while racing. I ran a hill climb with my 67 gto last year where revs were 4-6500 rpm for a lot of it and I think my oil was getting hot.

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Sent you a step file of the adapter.
There's no interference with a 200-4R and Doug's RP headers in my '66 GTO. But, I do have to use a shorter filter than that PF-35L with the Doug's. Last time I used a Mobil 1 filter that was 4" dia and about 4" long, forgot which p/n, but correct for an SB Chevy.

[padgett]

Just for S&G my tow car (Jeep Grand Cherokee with Pentastar and trailer towing package) has readouts for coolant, engine oil, and transmission oil temperatures.

With a 180F thermostats and "aggressive" radiator fans, nothing gets over 200F even with AC on MAX. Coolant usually runs 90-100F over ambient.

Biggest boon to transmissions is lockup, temp stays down when locked. I'll drop a gear or two on Interstate hills to stay out of PE and in lockup.

Agree, racing is different (why I had a 3.55 in my B/P Corvette) but for street driving that's my guideline.

[Steve C.]

"Redline seem to do the trick. I'd guess oil temps even with a cooler was in the 300+ degree range. Amazing stuff and pricey too."

X2


Ester based oil

.

[coslanzetta]

Originally Posted by hgerhardt

And that's why I love oil-to-water coolers like they used on 4th gen TA's with manual trans and C4 Corvettes.

On a cold start, the water heats faster than the oil which causes the cooler to actually warm the oil. After warmup, it's the opposite situation.

Below is the setup on my '66 GTO. It's a C4 Corvette unit (made by Modine) attached to a 90deg adapter via a simple adapter plate on a Firebird long-branch adapter. The hoses connect to the heater nipple on the RH head (although mine takes water from both heads) and then to the heater core. The switch (used to) control the electric fuel pump and also turn on an oil pressure idiot light (with rally gauges and solid rollers, you can't hear/easily notice if there's low oil pressure). This cooler also allows (forces?) the use of SBC oil filters. Unfortunately, with Doug's headers I have to use a shorter filter than that PF-35L (it worked well with H-O Racing's Tri-Y headers). If you want a CAD file of the adapter plate, shoot me a PM.

Hey why is the filter housing on such an angle to clear your headers ?I'd like to do this

[hgerhardt]

Originally Posted by coslanzetta

Hey why is the filter housing on such an angle to clear your headers ?I'd like to do this

Yes, that's exactly why it's angled backwards.