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Old 09-18-2020, 05:09 PM   #26
BeaverMeat
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Originally Posted by TR Conn View Post
I am also very concerned with overheating.
This is the setup I had on a 305 conversion I did about 15 years ago.
A pusher, two pullers and a fan cooled oil cooler.
The only time I had a problem was sitting in traffic for 2 hours, 90+ degrees outside and the A/C blasting. All was well until the fuse socket melted.
BTW this was fed by a 180 amp alternator.




Once I plum in the A/C I'll have to rethink the cooling system. The engine still has all the tubing and the compressor so I might as well use it... I'll probably have to change out the compressor to a newer one from an Exploder so I can use modern coolant.
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Old 09-18-2020, 07:23 PM   #27
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How does the PRV rad compare to the Diesel in size?
Same thing really, just larger inlets/outlets in different locations/orientations.

If you have/know anyone with relevant metal skills, replace the inlets/outlets on your existing & clean it, it uses all the surface area pretty effectively/volvo didn't use sub-standard materials on those.
Tho hotter weather they did make a super super super rare 3-row version of the PRV radiator, only ever owned 1.
Better metal in the OE than anything aftermarket, but they're all old.

The B20 top-bottom radiator cars 69-70? all models, & all 1800? have larger inlets/outlets than the B16/B18 cars. Hiperfauto knows about swapping the larger necks/inlets onto those rads for B20-converted B16 & B18 cars.

Long as the fan clutch/blade/shroud is any damn good/bumper air guide is in place, should stay cool for the given size of radiator that fits between the frame horns.
Maybe OE -'85 push fan if it needs to idle with the A/C on and has an intercooler/is boosted?
& some ducting to duct the air thru the giant triple thick heat exchanger sammich (IC/A/C/RAD in the case of a boosted car).
Heat soak is a PITA on a boosted A/C car.
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Old 09-24-2020, 08:12 PM   #28
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After some more wheel time... I’m starting to think the cooling system is efficient enough. It actually may be running too cool as it takes for ever to heat up in colder temperatures. I’m starting to think someone put a 180 thermostat in it... because “It’s what you do” when you have a ‘stang!
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Old 09-24-2020, 08:18 PM   #29
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Or the thermostat is sticking open.
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Old 09-24-2020, 08:37 PM   #30
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Or the thermostat is sticking open.
Most likely this.
The cool-kid upgrade is to use a 160F thermostat... which is a terrible idea. I think 185F is stock.

If you end up replacing the t-stat, spend the extra few dollars on a "high flow" thermostat. Major upgrade if you're cooling system is on the verge of being marginal when pushed hard.

ACDelco 12TP1D is one option
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Old 09-24-2020, 10:59 PM   #31
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Most likely this.
The cool-kid upgrade is to use a 160F thermostat... which is a terrible idea. I think 185F is stock.

If you end up replacing the t-stat, spend the extra few dollars on a "high flow" thermostat. Major upgrade if you're cooling system is on the verge of being marginal when pushed hard.

ACDelco 12TP1D is one option
195 is stock on the EFI 5.0. Putting a 160 was the old school carb upgrade that carried over. From what I gather the EFI 5.0 was designed to run hot. 200 is a normal running temp. It could just be stuck too.
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Old 09-24-2020, 11:22 PM   #32
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Originally Posted by Toybox View Post
Without a doubt, you have identified the problem perfectly. If it cools down with more airflow, then that's what it wants.


Some folks rationalize that V8 heat is normal. But for the folks who have fixed the issue, the secret is fans.
With all my time working on the 5.0s in the cars and trucks the 5.0 wasn't prone to running hot even when run harder. My F150 can sit in 100+ temps in traffic with the ac blasting and not run warm at all. The big difference is the shrouding.

When I did the Efan in my 240, I pulled the fan out of an S80 and trimmed the assembly to fit and even on the hottest days it didnt get warm. I did the comp board bypass and has the fan set to A) with a thermostatic switch, B)with the compressor or with C) an over ride so when I was at the track I could just turn it on an leave it on.
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