[ShanMan14]

I swear my bike is protesting the heat; it seems like I'm missing a little something off the line. I know on a dyno the figures show that heat is not good for HP, but I never thought it would be noticeable.

Of course, maybe I just need to get that major tuneup scheduled.

 

[drewpy]

i kno on a quad, its really notice able, but i dont kno about a streretbike, but it makes sense

 

[bumblebee]

Yes Sir... but I'm not as good as I once was... :lol: But I'm as good once as I ever was... :rofl3: :rofl3: :sorry:

 

[R1up0n1]

Shan I notice problems with the SV all the time in hot heat, but most of all I think it is the EXTREME HUMIDITY!! The bike just can't suck in this nasty humid sticky air. I notice major power loss here.

 

[Earlzach]

Cooler air make more HP. That is a fact. And of course in this upper 90's heat wave most of us are in, You will feel it if you ride your bike a lot. SV is also right about Humidity the bike just has a hrd time compensating for the moisture in the air. It robs the oxygen. or thins it. I forget. But it aint good for power. :scratch:

 

[SpeedWerks.com]

Heat and motorcycles sucks. More humidity = less air.

Fuel injection systems compensate for barometic pressure themselves. Less air into the motor, less fuel into the motor, less power. It compensates for itself.

I know with my two stroke, because it's carburated, I have to compensate for it. I use an air density gauge to determine how to jet my bike when there's more or less air at the track...the annoying thing is that RAD can change as much as it wants to during the day, so bike may run great in the morning, but have to change jets later in the day as the air changes. That's why you always see us two strokers taking so many notes!

Laura

 

[Need4Speed]

A nice brisk cool fall day, and my Kat is screaming for me. Yeah she loves the cooler weather. But even in the humidity of NC/TN a couple weeks ago, even in the higher altitudes and thinner air of the cherohala..she did surprisingly well considering all the factors against her.

Dont forget, heat takes it toll on the rider too..especially in full gear.

 

[Gas Man]

Yeah Shan, your bike is just running a bit lean in the heat... my 9R loves the colder air just as much as any but it really doesn't suffer much in the heat either after the jetting a fw years back...

 

[kanwisch]

Yup, I was just getting engaged in a model-specific (carb'd) discussion about the heat/humidity. One guy suggested upgrading to mid-grade fuel. Anyone try this? Knowing what I do about the meaning of octane ratings, it doesn't really follow, but I thought it worth asking.

 

[SpeedWerks.com]

One guy suggested upgrading to mid-grade fuel. Anyone try this? Knowing what I do about the meaning of octane ratings, it doesn't really follow, but I thought it worth asking.

I wouldn't take any mechanical advice from that guy

Air density doesn't change the compession ratio inside your motor, therefore you don't need more octane. In fact, since the air is less dense to begin with when it's hot/humid, there's even less reason (if there's anything less than "none" ) to waste your money on higher octane fuel your motor doesn't need.

- Roach

 

[bumblebee]

so actually a shot of Nos would help...

 

[twisty]

I was thinking about buying boat load dry ice and plopping it in my air box. :lol:


Q: What do you call the sweat produced when two ******** are having sex?

A: Relative humidity.

:lol:

 

[SpeedWerks.com]

I was thinking about buying boat load dry ice and plopping it in my air box. :lol:

(I know you're just joking ... this is just a Mr. Wizard question of the day )

Bonus points for the first person that explains why a bike would run WORSE (or not at all) with dry-ice packed in the air box. And it has nothing to do with humidity or moisture

- Roach

 

[drewpy]

(I know you're just joking ... this is just a Mr. Wizard question of the day )

Bonus points for the first person that explains why a bike would run WORSE (or not at all) with dry-ice packed in the air box. And it has nothing to do with humidity or moisture

- Roach

something to do with the lack of oxygen in the air surrounding the intake(?)
as the ice "melts" it gives of co2 an it displaces the O2? or i might be completly wrong :bonk:

 

[SpeedWerks.com]

something to do with the lack of oxygen in the air surrounding the intake(?)
as the ice "melts" it gives of co2 an it displaces the O2? or i might be completly wrong :bonk:

We have a winner!

Dry ice is solid CO2 - no hydrogen. And it actually doesn't melt - it sublimates directly to a gas at ambient air temps, and is non-flammable.

Basically ... you'd have no air to feed combustion.

- Roach

 

[drewpy]

but they use it on car intakes by placing it directly intop of the intake manifold to cool it that way so none of the gas gets near the air filter

 

[Gas Man]

Ding Ding Ding... we now have some brains in the house!! :lol:

 

[GsxrJack]

but they use it on car intakes by placing it directly intop of the intake manifold to cool it that way so none of the gas gets near the air filter

all the dry ice that the car guys use on the intakes is doing is cooling off the intake or inter coolers if they have em,,,,not cooling the air going into it, although a cooler intake will help cool the air.....