Mondello Cooling Restrictors

[john r. lebetski]

In Oct we woke to 18 deg and snow out west on I90. A bit below expected but not unheard of. You can't control mother nature. My stock 195 worked as it
should. As it did 2 days earlier in 85 deg and dash air running. And as it should pulling long grades over the majestic Rockies. An engine that dies
from overheating is ultimately the fault of the nut behind the wheel. If you can't feel the characteristics in drivabliity in an overheating engine
and check your gauges, maybe you should only drive a Prius. Given some of the poor longevity of some Mondello engines in MH service duty, maybe a
good 195 stat would have helped Washer = stoneage
--
John Lebetski
Woodstock, IL
77 Eleganza II
Source America First

 

[johnny]

When we ran in flat motors at Mac's on a test stand, we watched oil temp. There's a pronounced drop when the rings seat. Then we'd pull it off the
stand, put dessicant plugs in one set of spark plug holes, and ship it.

--johnny
--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"The road goes on forever, and the party never ends" --Robert Earl Keen

 

[george beckman]

> GOPOHERIT
>
> mine does not keep the engine cooler.
> runs 180 all the time
> just do not run the engine hotter for the heater ----
> does not make sense to me to do that
>
> no big deal , do what you will
> erf

In our first GMC, we were doing the Vermont fall colors. One morning we were freezing. Thermostat was stuck open or had junk in it. I stopped at the
first auto parts and got another thermostat and some antifreeze. When we began to drive the warm air from the heater was great.

I use EFI and it judges fuel mixture based on, among other things, water temperature. I don't want my rig running rich in cold weather just because it
thinks it has not warmed up.

When I helped Armand Minnie put in his current engine he got a fail open thermostat. Sounded good to me. There is no way I would drive with a "washer"
stuck where the thermostat is supposed to go. Makes no sense to me.

Remember, racing engines are torn down constantly, hence the different sizes of restrictors.

But, hey, this is America. Do as you feel best.
--
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George

 

[Gene Fisher]

On Sat, Jan 21, 2017 at 10:41 PM George Beckman
wrote:

> GOPOHERIT

>

> mine does not keep the engine cooler.

> runs 180 all the time

> just do not run the engine hotter for the heater ----

> does not make sense to me to do that

>

> no big deal , do what you will

> erf

In our first GMC, we were doing the Vermont fall colors. One morning we
were freezing. Thermostat was stuck open or had junk in it. I stopped at the

first auto parts and got another thermostat and some antifreeze. When we
began to drive the warm air from the heater was great.

I feel it is shameful to cook your 455 just for a heater !!!

I use EFI and it judges fuel mixture based on, among other things, water
temperature. I don't want my rig running rich in cold weather just because
it

TURNS OUT, MANY OF US USE 40 YEAR OLD COMPUTERS FOR OUR EFI

I USE HOWELLS ON 2 OF MY 3 GMCS. AND THEY USE THE " WORSTE INJECTORS EVER
MADE"

http://gmc49ers.blogspot.com/2014/12/my-atomic-1973-23.html

ACCORDING TO WITCHHUNTER

http://www.witchhunter.com

SO I DONT NEED ANOTHER BATTLE TO WORRY ABOUT !!

thinks it has not warmed up.

TURNS OUT A THERMOSTAT CAN - ONLY HEAT AN ENGINE- MY MONDELLO RUNS AT 180
, AFTER ONE MILE FROM HOME

When I helped Armand Minnie put in his current engine he got a fail open
thermostat. Sounded good to me. There is no way I would drive with a
"washer"

stuck where the thermostat is supposed to go. Makes no sense to me.

I NEVER THINK ABOUT THERMOSTATS , ONE LESS ISSUE

Remember, racing engines are torn down constantly, hence the different
sizes of restrictors.

But, hey, this is America. Do as you feel best.

--

'74 Eleganza, SE, Howell + EBL

Best Wishes,

George

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[78gmcroyale]

Very interesting thread! I think I'll stick with my 195 stat. I read every post, I think I need to take a few tylenol now.

 

[robert mueller]

If I going to drag race a GMC I'd go with Mondello's recommendation but I'll
stick with the thermostat that has been used in BILLIONS of street vehicles.

Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Ray
Erspamer
Sent: Monday, January 23, 2017 3:04 AM
To: gmclist
Subject: Re: [GMCnet] Mondello Cooling Restrictors

Very interesting thread! I think I'll stick with my 195 stat. I read
every post, I think I need to take a few tylenol now.

 

[adolph santorine]

Agreed. It’s a whole different thing trying to “cool” an engine used for drag racing!

Dolph

DE AD0LF

Wheeling, West Virginia

1977 26’ ex-PalmBeach
1-Ton, Sullybilt Bags, Reaction Arms, 3.70 LSD, Manny Transmission, EV-6010

“The Aluminum and Fiberglass Mistress"

>
> If I going to drag race a GMC I'd go with Mondello's recommendation but I'll
> stick with the thermostat that has been used in BILLIONS of street vehicles.
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> USAussie - Downunder
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces] On Behalf Of Ray
> Erspamer
> Sent: Monday, January 23, 2017 3:04 AM
> To: gmclist
> Subject: Re: [GMCnet] Mondello Cooling Restrictors
>
> Very interesting thread! I think I'll stick with my 195 stat. I read
> every post, I think I need to take a few tylenol now.
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[JHeslinga]

GEEE: In Northern Canada, our cooling restrictors look like this. ;>》
http://www.gmcmhphotos.com/photos/discussion-photos/p62088-cooling-restriction-cold-weather.html
At -25C the heater core is almost more cooling capacity than needed for some of the engine operating conditions. The coolant in the Radiator gets
so cold that when the thermostat opens so much cold water comes into the engine that it can never warm up.

The cooling system of our vehicles are designed for extreme conditions (look at the size of our radiators and fans!!) The thermostat is designed to
adjust the amount of cooling for the engines needs.

Removing it and letting free flow will simply over cool the engine when not needed. It's my feeling that if your engine gets up to temperature
without a Thermostat then the capacity of the cooling system is insufficient for extreme conditions and has been restricted in some way. Much the
same we purposely do in the north during cold weather.
--
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta