cooling Help Needed... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

T.N. Stroker · 09-02-2012, 01:09 PM

Cooling help needed..! I have a 1970 gmc with a 383 stroker with very close to 500 hp. I'm running a TCI Street Fighter 700R4 trans. I have a 3 core rad that measures 28" x 18.5" with trans cooler mounted in front coming through Rad first. I have a 16" flex fan with shroud. I discovered to day that I have been running with no thermostat when I was attempting to replace it. I installed an 180 degree thermostat an im still idling at 230 degrees but highway temp is 190 degrees. I'm thinking I need electric puller fans unsure what cfm, I don't know. Any and all is appreciated, Thanks..!
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BADPURPLE70CHEVY · 09-02-2012, 05:58 PM

Quote:

Originally Posted by T.N. Stroker

Cooling help needed..! I have a 1970 gmc with a 383 stroker with very close to 500 hp. I'm running a TCI Street Fighter 700R4 trans. I have a 3 core rad that measures 28" x 18.5" with trans cooler mounted in front coming through Rad first. I have a 16" flex fan with shroud. I discovered to day that I have been running with no thermostat when I was attempting to replace it. I installed an 180 degree thermostat an im still idling at 230 degrees but highway temp is 190 degrees. I'm thinking I need electric puller fans unsure what cfm, I don't know. Any and all is appreciated, Thanks..!
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I am running a 406 with close to 550 horses and i run 180 even in 100 degree weather. I have an electric fan also but never hardly use it. Couple questions for you. Are you running a fan shroud? Are you running a aluminum radiator?

T.N. Stroker · 09-02-2012, 06:08 PM

I am using a shroud and I am not using an aluminum but it is a 3 core. The flex fan is only 16"...
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T.N. Stroker · 09-04-2012, 08:50 PM

What do you guys think the optimum operating temp should be..?
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PanelDeland · 09-02-2012, 06:05 PM

I would start with a stock clutch fan and a shroud.

**Stocker** · 09-05-2012, 12:51 AM

Quote:

Originally Posted by PanelDeland

I would start with a stock clutch fan and a shroud.

Quote:

Originally Posted by 69GWC

I would stick a 18" clutch fan on it myself I would think that would pull alot more air in then what you have on it now.

This is what I would do. With all the power you're making, you might also need a 4-row radiator. But try a better fan first. The only time my truck ever ran hot was when I had a flex fan.

I would expect to run from 200 to 210 degrees at idle, maybe a bit more but that's about the max for what I'd consider ideal.

Xeen · 09-05-2012, 05:20 AM

I agree with Stocker about the radiator.

However anytime you are trying to put horsepower to the ground you want to get rid of parasitics on your engine so an electric fan setup is always the best option if you have the cash.

69GWC · 09-04-2012, 09:14 PM

I would stick a 18" clutch fan on it myself I would think that would pull alot more air in then what you have on it now.
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T.N. Stroker · 09-05-2012, 06:35 AM

Thanks for the input guys..! I have a dual 13.5" Flex-A-Lite 4600 cfm on the way... I will update..
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**Tom Vogel** · 09-05-2012, 09:04 AM

Get rid of that Flex fan. Get rid of it.

T.N. Stroker · 09-10-2012, 12:41 PM

Electric Fans done the trick. Idling at 190 and all is well..! Thanks..
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hayhauler71 · 09-11-2012, 03:56 PM

Quote:

Originally Posted by T.N. Stroker

Electric Fans done the trick. Idling at 190 and all is well..! Thanks..
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Have a part number on the fan and how about some pics thanks

T.N. Stroker · 09-14-2012, 12:08 AM

, "FLX-298" in Summit. I will post pics later, I need to take some...
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T.N. Stroker · 09-17-2012, 04:33 PM

I can't seem to upload the pics from a mobile device and its the only access to the web at the moment. Will keep trying.
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09-02-2012, 01:09 PM	#1
T.N. Stroker Registered User Join Date: Aug 2012 Location: Bristol T.N. Posts: 11	cooling Help Needed... Cooling help needed..! I have a 1970 gmc with a 383 stroker with very close to 500 hp. I'm running a TCI Street Fighter 700R4 trans. I have a 3 core rad that measures 28" x 18.5" with trans cooler mounted in front coming through Rad first. I have a 16" flex fan with shroud. I discovered to day that I have been running with no thermostat when I was attempting to replace it. I installed an 180 degree thermostat an im still idling at 230 degrees but highway temp is 190 degrees. I'm thinking I need electric puller fans unsure what cfm, I don't know. Any and all is appreciated, Thanks..! Posted via Mobile Device

09-02-2012, 06:08 PM	#3
T.N. Stroker Registered User Join Date: Aug 2012 Location: Bristol T.N. Posts: 11	Re: cooling Help Needed... I am using a shroud and I am not using an aluminum but it is a 3 core. The flex fan is only 16"... Posted via Mobile Device

09-04-2012, 08:50 PM	#4
T.N. Stroker Registered User Join Date: Aug 2012 Location: Bristol T.N. Posts: 11	Re: cooling Help Needed... What do you guys think the optimum operating temp should be..? Posted via Mobile Device

09-02-2012, 06:05 PM	#5
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: cooling Help Needed... I would start with a stock clutch fan and a shroud. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

09-05-2012, 05:20 AM	#7
Xeen Registered User Join Date: Aug 2012 Location: Topeka Kansas Posts: 2,655	Re: cooling Help Needed... I agree with Stocker about the radiator. However anytime you are trying to put horsepower to the ground you want to get rid of parasitics on your engine so an electric fan setup is always the best option if you have the cash. __________________ Please call me Brian. Check out My 1972 SWB Fleetside 5.3L Vortec Restomod Build

09-04-2012, 09:14 PM	#8
69GWC Registered User Join Date: Jun 2012 Posts: 1,089	Re: cooling Help Needed... I would stick a 18" clutch fan on it myself I would think that would pull alot more air in then what you have on it now. Posted via Mobile Device

09-05-2012, 06:35 AM	#9
T.N. Stroker Registered User Join Date: Aug 2012 Location: Bristol T.N. Posts: 11	Re: cooling Help Needed... Thanks for the input guys..! I have a dual 13.5" Flex-A-Lite 4600 cfm on the way... I will update.. Posted via Mobile Device

09-05-2012, 09:04 AM	#10
Tom Vogel 2WD Jimmy Join Date: Mar 2005 Location: Davis County, Utah Posts: 2,565	Re: cooling Help Needed... Get rid of that Flex fan. Get rid of it.

09-10-2012, 12:41 PM	#11
T.N. Stroker Registered User Join Date: Aug 2012 Location: Bristol T.N. Posts: 11	Re: cooling Help Needed... Electric Fans done the trick. Idling at 190 and all is well..! Thanks.. Posted via Mobile Device

09-14-2012, 12:08 AM	#13
T.N. Stroker Registered User Join Date: Aug 2012 Location: Bristol T.N. Posts: 11	Re: cooling Help Needed... , "FLX-298" in Summit. I will post pics later, I need to take some... Posted via Mobile Device

09-17-2012, 04:33 PM	#14
T.N. Stroker Registered User Join Date: Aug 2012 Location: Bristol T.N. Posts: 11	Re: cooling Help Needed... I can't seem to upload the pics from a mobile device and its the only access to the web at the moment. Will keep trying. Posted via Mobile Device

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