4runnermax

Working at Advance i get to see alot of ""inovative"" car accessories. I was thinking couldn't you enhance the 3.0's ability to cool??? Thus prenthing the over heat caused by leaning out the engine??

My thaughts
higher capacity radiator, oil cooler...
High performance fans...
Wrapping exhaust (hoses, intake too??) to isolate its heat...
Radiator,crankcase,tranny cool down additives (Redline ect)...

Now to the """inovative""" part I came across a catalog I beleive by D.E.I. about CRYO2 It uses compressed co2 to cool down intake air (thats the main part of the sys) I believe they have another setup that puts a loop around the front of the radiator to furthur cool its incoming air... Its mainly advertised for tuner cars but why not for us??????? ((((I beileive they carry a """complete"""" cool down kit including heat wrap and stuff))))

I'm thinking about buying some temp gauges to mesure specific engine temp in diff surcomstances and record them... Then when I'm done shaking my money tree for a few years doing a cryo2 conversion (with all the other stuff of cource) and and lean my runner out.... and see what kind of temps I get along w/performance...

Any body thaught about this????

bob200587

a bigger radiator helps, dunno if they have bigger oil coolers. They have fans with cupped blades and stuff that draw in more air. Heat wrap isn't worth a damn as far as I'm concerned....alot of headers say not to wrap them with it.

4runnermax

hmmm... I'll look into the header thing... I figured that would be my first cheap thing todo... because it would keep alot of heat from radiating back into the engine bay...

4runnermax

I figure you use the cryo2 system as the heat gets to hot on my sensors, engage the system to bring the temps back down quick!!!! The sys runs on compressed co2 like painballguns so the gas is relatively cheap. You can rent a 50lbs tank of co2 for like $20!! plus $16 each refill... But the kits do cost up to $250 hey it might be worth it!!

NC-B17A

heatwrap does work & the reason that most headers say not to use it is that the materal you are wrapping the steel piping in will hold water & heat & make the header rust out &/or the extra heat will shorten its life.

Toysrme

Most factory pipes at some point (merge, down/up pipes, y-pipes) use heat-wrap, but they also worry about setting stuff on fire if it drips down the engine bay.
Lean out problems? On a good condition Toyota? That's news to me. Most factory N/A Toyota's with a good system are set so rich they would hit A/F's in the 11's to low 12's if you checked them.

If you have lean problems, you need to fix them. NOT solve the overheating from being lean!!!!!!!!!!



If you have no cooling system problems, yet you are worried about mild overheating from power upgrades, or heavy use. There are several things you can do:
1) Install slightly higher pressure caps. Roughly, every psi will increase the boiling temp of water by 2*F. Every psi will increase a 50-50 mix of water/coolant about 3.25*F. Stock is 14.9psi caps (260*F), and you stick a 19psi cap (273*F), you just increased cooling capacity alot.
2) Install a cooler thermostat. The old saying... S in, S out. Might as well take the opportunity to get a Toyota 160-170*F thermostat instead of the stock 180*F thermostat.
3) Trigger the fans to run earlier, or all the time.
*note* I don't know if this applies to any of the truck/suv's, but Toyota frequently use power-steering fluid operated hydraulic fans in the late 80's early 90's. These SHOULD NOT be replaced with an electric fan! The simple fact of the matter is that these fans are extremely powerful, and very few electric fans preform as well. Only large, top tier fans are better.



Lastly, Install a larger capacity radiator, and a larger capacity fan.

tc

I don't get the question...the catastrophic damage from running lean is due to higher flame temps within the cylinders. Run too lean for too long and no amount of radiator is going to save you from burnt pistons and valves.

4runnermax

Actually i'm having no probs.... To clearify my thread was merly a theory I was trying to get input on... simply with an extremly beefed up cooling sys including a possible cryo2 system be enogh to compensate for the over heating caused from trying to lean out your 3.0, thus giving you extremly good mpg and with out killing your engine ....

Though from what tc said our 3.0 would still burn there rings to crap ....

Just trying to get some thoughts, I might try it out later on....

bob200587

thoughts....

4runnermax

eww a funny one......

V_Runner

try wrapping the ehaust pipes strating right at the engine...this will increase exhaust flow,which in trun increase power, and keep under the hood cooler...