engine cooling mods

nxhappy

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sounds pretty normal. maybe adjust the fan settings and when they kick on.
 

94slowbra1

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Well I just got confirmation from my tuner that my fan does kick on at 190. So I'm guess that my gauge is either off or isn't in the best location (coolant crossover tube).
If this in indeed the case and it's off by about 12 degrees then I cruise around at around 175-180 which is fine I think.
I'll verify this with the laptop and live link
 

IllCobra

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The only real advantage Evans Waterless has over water, are boiling point and the corrosivity, which admittedly are both huge! However nothing is a better heat transfer medium than water and water with relaxed surface tension is even better.
You need to determine your present cooling system and intercooling system total fluid capacity each, in order to properly dose your systems with Purple Ice. It is important to get it as close to two ounces per quart as you can. Two ounces per quart is 8 ounces per gallon, so no, that is not likely going to enough even for a bone stock system.

Just look for the words "filtered drinking" or "reverse osmosis", and then buy the cheapest generic stuff you can find. If you have a home water treatment system that uses reverse osmosis and it does not use salt for the water softener, you can also use that.
Hey Jimmy, I looked at RP Ice and it says that one 12 oz bottle will treat 20 quarts. Am I looking at the correct one or does your mix ratio preform better?
 

Jimmysidecarr

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Hey Jimmy, I looked at RP Ice and it says that one 12 oz bottle will treat 20 quarts. Am I looking at the correct one or does your mix ratio preform better?

One ounce per quart is the dosing sweet spot for a standard 50/50 water antifreeze mixture. One 12oz bottle will treat up to 20 quarts of a 50/50 mixture, but it is not the dosing sweet spot.
Anytime you are treating a mixture with more than 50% water, you want to run at least two ounces per quart, same as a straight water racing mixture.
Or as close to two ounces per quart as you can approximate


Sent from my iPhone using the svtperformance.com mobile app
 

tt335ci03cobra

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A simple easy mod that also helps is finding a 97-98 Lincoln mk8 fan, and rewinding the motor/refreshing it. Dropping a fresh mk8 fan in virtually eliminates any airflow issues that things like large heat exchangers or intercoolers create.

Our stock fans run (iirc) 2400/3700cfm low/high.

The mk8 units run 3500/5000 low/high and are physically almost identical in size/packaging to stock cobra fans.

They had to run such an aggressive fan because the mk8's had almost no airflow to the engine bay due to the style of the front end.
 

tt335ci03cobra

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I don't like 160's on these cars. I do run them on Chevys and ohv's though but rarely.

A fully opening 185-190 is honestly ideal given a properly working system that can keep up with the heat these produce.

These heads develops nasty amounts of deposits and gunk when ran too cold for prolonged periods. 160-175° is too cold for regular driving. Cold driving in general creates the most deposits and grime in an engine. The combustion simply isn't hot enough to fully burn the gasses, and the exhaust is too cool to fully escape.

Go for a handful of 2nd through 5th gear wot pull to 170mph after 20,000 miles with a 160° stat, and it'll probably pre ignite and blow up sooner or later. There's too much heat at those scenarios for a band aid 160° stat/mostly stock cooling system to handle, it easily sees 230°+ in those conditions which is melting zone. Heat finds deposits, they ignite prematurely, kaboom.

The tight piston/wall clearance makes far too much heat in these mills. #8 is basically a furnace...
 

DSG2003Mach1

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A simple easy mod that also helps is finding a 97-98 Lincoln mk8 fan, and rewinding the motor/refreshing it. Dropping a fresh mk8 fan in virtually eliminates any airflow issues that things like large heat exchangers or intercoolers create.

Our stock fans run (iirc) 2400/3700cfm low/high.

The mk8 units run 3500/5000 low/high and are physically almost identical in size/packaging to stock cobra fans.

They had to run such an aggressive fan because the mk8's had almost no airflow to the engine bay due to the style of the front end.

is there a guide for rewinding/refreshing the Mark 8 fan motor?

also, isnt the oem temp sensor in the coolan crossover tube as well?
 

tt335ci03cobra

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It would be a similar procedure to rewinding electric motors. I sent mine to a machinist for $80. It's a simple job, you could probably do it yourself if you had the tools and time, I didn't.

The factory temp sensor is located on the crossover tube iirc, I've been turbo for over ten years and honestly can't remember.

Edit: after a quick Google search, I'm confident it's on the crossover stock. Looks that way anyways
 

s351

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Go for a handful of 2nd-5th up to 170mph at wot??? it's not the 160 tstat that's going to fail you, your motor will let go do to the ptw clearance and the heat it creates. It's a known thing to stay out of 5th gear pulls. Not sure what the difference the tstat makes in those scenarios. 160, 170, or 180 none of that will make a difference.
 

racebronco2

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I have used a Mark VIII fan for years. With the driver side window down, i can put my had right in front of the driver's mirror and feel the air coming from the vents. The weirdest thing i have seen on the hood vents is the rain drops jumping from fin to fin til it hits the flat portion of the hood, almost like the rain is dancing on the vents.
 

94slowbra1

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Go for a handful of 2nd-5th up to 170mph at wot??? it's not the 160 tstat that's going to fail you, your motor will let go do to the ptw clearance and the heat it creates. It's a known thing to stay out of 5th gear pulls. Not sure what the difference the tstat makes in those scenarios. 160, 170, or 180 none of that will make a difference.
You always hear about the rear cylinders failing due to heat. Wouldn't a good HCM with proper cool down between runs help this?
 

s351

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The thing is no one has actually proven the head cooling mod does anything, I have one on my car, but there is no evidence it works. E85 probably would help more then the hcm.
 

c6zhombre

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I'll stick with my 170. I need to confirm that my AM gauge is off, which I assume it is

I checked the paperwork 04sleeper left me for the car....this car has a 170 thermostat from Napa that cost $8.49 when he bought it in 2006. The coolant looks like motorcraft gold (I've never messed with it, it still tests fine with my prestone tester)

Looks like that thermostat is $9.49 now lol

https://www.napaonline.com/en/p/MRD3
 

94slowbra1

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I run the Preston green in both my engine coolant and inner cooler system
Also I have revised db casting heads that are "supposed" to help the rear cylinders.
How good the hcm works is debatable, I can't imagine it doesn't help at all though
 

tt335ci03cobra

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@s351

Heat is the issue. I clearly said that in my post. The piston/wall is too tight and makes tons of heat.

Deposition and heat make kaboom happen.

160 stats don't let the head get hot enough to fully burn the fuel/gasses. It leaves deposits. Pre ignition at high load is very bad. Detonation is very bad at any load. Both detonation and pre ignition are more likely to occur with excess build up.

The 160 stat will be too cold for daily driving unless you are in 100° weather and bumper/bumper traffic. It won't do anything for additional cooling ability once the mill is hot.

The problem with the stock stat isn't that it's a 190. It's that it's a bleeding 190 that doesn't fully open until 219° iirc. A fully opening 190° stat is great in most climates, and a 180° in very hot places like Arizona is a great idea.

Ask a modular engine builder. Mine said years back don't put that in. Do it right, this is why. Band aid remedies have a place, this isn't it. We get -10 to 110° weather. A 160° stat would only do any good in mid July when canyon carving hard. Otherwise it would dramatically gunk my heads.

If someone lives in a very hot climate and daily drives, a fully opening 180° is all they'd need if it had everything else in good working order.

Anyways, opinions are like assholes, and I'm constantly told I'm an asshole. But, if a guy reading this doesn't run into an issue or major failure by avoiding something that is well intended but incorrect for their application, I'll gladly take the heat of a little well intended grilling from someone also just looking out.

There's lots of bad info on the Internet. Good looking out bud.
 
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