Engine shroud question.

[z50r-ghost]

Good hypothesis, Wheelman! A scooter engine running with lower compression would in theory run a tad cooler than an engine with factory spec compression

j

[Kemmer]

It's an Aero 50, not a spree. It still does an easy 40mph, just like it always did. If you guys really think airflow from that little fan is greater than airflow from going down the road at 25+ with no plastics I suppose I won't convince you otherwise. Either way, the bike runs great, it has never seized (as some of the experts here assured me would happen immediately) and don't see any reason to believe that it won't continue to run just fine indefinitely. I don't have the shroud to put back on anyway, my buddy tossed it.

My purpose in updating this thread was simply to inform people that running without a shroud* does not equal instant death by heat seize. YMMV and all that jazz, there's no reason outside of aesthetics to ditch the shroud so if you're worried about it keep it on.

*this discussion assumes you have stripped your scooter of all the plastics. do not attempt this with the side plastics on under any circumstances. I wouldn't even attempt it with the front plastics on.

[Bear45-70]

It's an Aero 50, not a spree. It still does an easy 40mph, just like it always did. If you guys really think airflow from that little fan is greater than airflow from going down the road at 25+ with no plastics I suppose I won't convince you otherwise. Either way, the bike runs great, it has never seized (as some of the experts here assured me would happen immediately) and don't see any reason to believe that it won't continue to run just fine indefinitely. I don't have the shroud to put back on anyway, my buddy tossed it.

My purpose in updating this thread was simply to inform people that running without a shroud* does not equal instant death by heat seize. YMMV and all that jazz, there's no reason outside of aesthetics to ditch the shroud so if you're worried about it keep it on.

*this discussion assumes you have stripped your scooter of all the plastics. do not attempt this with the side plastics on under any circumstances. I wouldn't even attempt it with the front plastics on.

And just how many are willing to run without plastics? I will bet the number is less than 10%. Also assuming that everyone will understand the requirement to remove the plastics is a major NO-NO. Because all they will see is the cooling fan and shrouds are not necessary and remove same, reinstall their plastics and ruin their motor. Besides that the difference in top speed will be less than 1 mph with the fan and shroud removed. * just change the tire size and get than much and it is safer on the motor.

[Trafficjamz]

Has anyone with a CHT or EGT gauge ever took of the engine shroud and measured the difference?

[Kemmer]

It's an Aero 50, not a spree. It still does an easy 40mph, just like it always did. If you guys really think airflow from that little fan is greater than airflow from going down the road at 25+ with no plastics I suppose I won't convince you otherwise. Either way, the bike runs great, it has never seized (as some of the experts here assured me would happen immediately) and don't see any reason to believe that it won't continue to run just fine indefinitely. I don't have the shroud to put back on anyway, my buddy tossed it.

My purpose in updating this thread was simply to inform people that running without a shroud* does not equal instant death by heat seize. YMMV and all that jazz, there's no reason outside of aesthetics to ditch the shroud so if you're worried about it keep it on.

*this discussion assumes you have stripped your scooter of all the plastics. do not attempt this with the side plastics on under any circumstances. I wouldn't even attempt it with the front plastics on.

And just how many are willing to run without plastics? I will bet the number is less than 10%. Also assuming that everyone will understand the requirement to remove the plastics is a major NO-NO. Because all they will see is the cooling fan and shrouds are not necessary and remove same, reinstall their plastics and ruin their motor. Besides that the difference in top speed will be less than 1 mph with the fan and shroud removed. * just change the tire size and get than much and it is safer on the motor.

I am running without plastics because most of them were damaged or missing. I don't think there is any kind of performance gain at all. I am not advocating that anyone do this. I'm just reporting back that in my particular case, running without the plastics made it possible to remove the shroud without immediate engine failure.

Has anyone with a CHT or EGT gauge ever took of the engine shroud and measured the difference?

I have one of these on my moped: http://www.treatland.tv/trail-tech-vapo ... mputer.htm If someone has readings from a Stock Aero 50 with plastics, fan and shroud it would be fairly easy for me to put it on the Aero and compare.

[eliteguy50]

And just how many are willing to run without plastics? I will bet the number is less than 10%. Also assuming that everyone will understand the requirement to remove the plastics is a major NO-NO. Because all they will see is the cooling fan and shrouds are not necessary and remove same, reinstall their plastics and ruin their motor. Besides that the difference in top speed will be less than 1 mph with the fan and shroud removed. * just change the tire size and get than much and it is safer on the motor.

If the shroud is gone, might as well pull the fan too. If you want to see the fan, cut the intake fins on the shroud (warning: leaves and other debris can enter the cooling system when this is done, best avoided by replacing with a mesh screen).

[Bear45-70]

And just how many are willing to run without plastics? I will bet the number is less than 10%. Also assuming that everyone will understand the requirement to remove the plastics is a major NO-NO. Because all they will see is the cooling fan and shrouds are not necessary and remove same, reinstall their plastics and ruin their motor. Besides that the difference in top speed will be less than 1 mph with the fan and shroud removed. * just change the tire size and get than much and it is safer on the motor.

If the shroud is gone, might as well pull the fan too. If you want to see the fan, cut the intake fins on the shroud (warning: leaves and other debris can enter the cooling system when this is done, best avoided by replacing with a mesh screen).

Cutting the fins out of the shroud intake will degrade air flow thereby degrading cooling.

[eliteguy50]

And just how many are willing to run without plastics? I will bet the number is less than 10%. Also assuming that everyone will understand the requirement to remove the plastics is a major NO-NO. Because all they will see is the cooling fan and shrouds are not necessary and remove same, reinstall their plastics and ruin their motor. Besides that the difference in top speed will be less than 1 mph with the fan and shroud removed. * just change the tire size and get than much and it is safer on the motor.

If the shroud is gone, might as well pull the fan too. If you want to see the fan, cut the intake fins on the shroud (warning: leaves and other debris can enter the cooling system when this is done, best avoided by replacing with a mesh screen).

Cutting the fins out of the shroud intake will degrade air flow thereby degrading cooling.

But not to a level that would make it unreliable.

[Bear45-70]

If the shroud is gone, might as well pull the fan too. If you want to see the fan, cut the intake fins on the shroud (warning: leaves and other debris can enter the cooling system when this is done, best avoided by replacing with a mesh screen).

Cutting the fins out of the shroud intake will degrade air flow thereby degrading cooling.

But not to a level that would make it unreliable.

Can't say that for sure, with a BBK producing more heat than stock, you are already taxing the cooling system beyond design, so any degrading of the cooling system is NOT a good idea. In fact degrading the cooling system at any time is asking for trouble and is a bad idea.

[eliteguy50]

Cutting the fins out of the shroud intake will degrade air flow thereby degrading cooling.

But not to a level that would make it unreliable.

Can't say that for sure, with a BBK producing more heat than stock, you are already taxing the cooling system beyond design, so any degrading of the cooling system is NOT a good idea. In fact degrading the cooling system at any time is asking for trouble and is a bad idea.

I did not realize he was running a bore kit on the aero. I have done this with a stock Aero engine for several hundred miles with no issues.

[evilone]

I ran my 69.8mph Malossi 72cc with cooling fins cut out and temps maxed around 350 and never any over-heating issues.
I'm not recommending it and i will leave the fins intact in the future but i can say i've been there done that without a problem.

[eliteguy50]

I ran my 69.8mph Malossi 72cc with cooling fins cut out and temps maxed around 350 and never any over-heating issues.
I'm not recommending it and i will leave the fins intact in the future but i can say i've been there done that without a problem.

X2, I only did it because some kid's folks were not watching him while tailgating and my aero ate the head of his golf club I had to cut out the left over fin parts.

[killerpancake]

will removing the fan shroud off the very top of the head(the one that looks like a cube) cause an engine to overheat, or is the main one over the fan enough?

[eliteguy50]

will removing the fan shroud off the very top of the head(the one that looks like a cube) cause an engine to overheat, or is the main one over the fan enough?

I would guess that one side would get hot but not enough to seize it. Might notice the heat soak sooner. Try it and let us know.

[Bear45-70]

will removing the fan shroud off the very top of the head(the one that looks like a cube) cause an engine to overheat, or is the main one over the fan enough?

This is like asking if you only need half of your radiator to cool your car. You NEED ALL OF IT IN PLACE.