Overheating Problems

[stock car driver]

If you cant turn your motor with your fan your belts and or pulleys are too loose and worn and are slipping at rpm..

you MUST be able to at least turn the motor enough to remove the timing chain slop then back the other way or they are slipping

v belt alum pulleys are good for about a season usually

[25drtrkr]

Be sure your fan is centered behind the radiator. We had that issue on a Dirt Works before. Also, you got to have that 4 blade gm fan, cant stress that enough. Your 220-225 temps isn't going to hurt anything with those steel Vortec heads, but you don't want no more temp than that.

[HuckleberryB4]

Without reading all posts, with a double pass you NEED a stage 2 or 3 high volume water pump. The radiator cap should also be rated around 29-32 lbs. Also, completely drain the coolant system. Run all distilled water and a bottle of water wetter. No coolant. The water wetter has enough lubricity properties to protect the system.

[wallbangerII]

tell me more about single blade fans please. are they one blade of a gm fan ? do they crack and break ?

thanks

[stock car driver]

whatever 4 blade you cut two off

[hughesracing9]

^^^ this! i bought one and that is literally all it is...plus a decal on the edge of the blades

[stock car driver]

^^^ this! i bought one and that is literally all it is...plus a decal on the edge of the blades

I beat my head against a wall trying to tell everyone they can cut two off on their own for years. (I started running single blade in 2008 for sure all of 2009).

I finally caved this spring and started buying all star fans and cutting them off and selling them for $60 shipped. It is amazing how many guys do not want to cut their own.

[HuckleberryB4]

How do you benefit from a 2 blade more than a 4? Less Turbulence? Run it with or without a shroud? I have an extra 19" Allstar 4 blade I'm thinking about cutting up now. lol.

[HuckleberryB4]

Found this while researching.

http://store.crateinsider.com/2-blade-18-steel-fan-by-hendren-racing-engines-multiple-colors/

We run around 210* - 215* with a double pass, the GM 19" fan on gas and no shroud in a LM. Wondering if I would benefit from going to this with out the shroud still.

[billetbirdcage]

How do you benefit from a 2 blade more than a 4? Less Turbulence? Run it with or without a shroud? I have an extra 19" Allstar 4 blade I'm thinking about cutting up now. lol.

It's pretty simple really, while a 2 blade or other type fans that don't/won't pull as much air but reduces the power used to turn it. It basically boils down to how much airflow you need for your set up to stay cool. If you have more then enough airflow, then going to a 2 blade or smaller 4 blade fan will free up some power, thus may or may not increase temps depending if you still have the airflow you need.

It's not rocket science. But as a general statement if you running a crate that you are close to wide open all the time, then you may run close to the edge with a 2 blade on gas. E85 makes it a little more tolerable. Obviously it depends on engine load, outside temps and the rest of your cooling system and how efficient it is whether you can run one with no issues or not. (this is more based on a crate LM, I could see a mod getting away with the 2 blade way easier due to smaller tires and probably less load on the engine for a given lap).

[25drtrkr]

Found this while researching.

http://store.crateinsider.com/2-blade-18-steel-fan-by-hendren-racing-engines-multiple-colors/

We run around 210* - 215* with a double pass, the GM 19" fan on gas and no shroud in a LM. Wondering if I would benefit from going to this with out the shroud still.

Those come from Hendren and they are balanced also.

[stock car driver]

It's pretty simple really, while a 2 blade or other type fans that don't/won't pull as much air but reduces the power used to turn it. It basically boils down to how much airflow you need for your set up to stay cool. If you have more then enough airflow, then going to a 2 blade or smaller 4 blade fan will free up some power, thus may or may not increase temps depending if you still have the airflow you need.

It's not rocket science. But as a general statement if you running a crate that you are close to wide open all the time, then you may run close to the edge with a 2 blade on gas. E85 makes it a little more tolerable. Obviously it depends on engine load, outside temps and the rest of your cooling system and how efficient it is whether you can run one with no issues or not. (this is more based on a crate LM, I could see a mod getting away with the 2 blade way easier due to smaller tires and probably less load on the engine for a given lap).

Wrong, I guess it is rocket science...

A 2 blade pulls MORE air than a 4 blade.. think about it a little.

[stock car driver]

Those come from Hendren and they are balanced also.

Balanced? That's a new one..

They are all star fans with 2 cut off.

Even the gm fan which is advertised as balanced is NOT balanced, if you order 10 of them they all have the same weight in the same place riveted on....

[billetbirdcage]

Wrong, I guess it is rocket science...

A 2 blade pulls MORE air than a 4 blade.. think about it a little.

OK, but my test shows different

17% less air flow, now granted my air flow meter didn't go high enough that I could get to full RPM on the fan.

[stock car driver]

OK, but my test shows different

17% less air flow, now granted my air flow meter didn't go high enough that I could get to full RPM on the fan.

B.S your full of it.