Cold gas = more power? - Triumph675.Net Forums
General 675 discussion Anything related to the Triumph 675 model(s), and miscellaneous motorcycle talk.

Reply
 
Thread Tools Display Modes
post #1 of 29 Old 12-20-12, 23:59 Thread Starter
astat4
Member
 
astat4's Avatar
 
Join Date: Nov 2012
Location: Donna
Posts: 622
Thanks: 3
Thanked 10 Times in 9 Posts
Cold gas = more power?

So I was at work and its like.... 43 degrees turned my bike on to warm it up. Warmed it up nd took off, so when I go WOT the bike pulled like a mofo.! Was it the cold air its sucking in cause I know motors work better with cold air yeah. But what about fuel? Does it make difference if the gas was cold cause I could feel my tank freezing on my legs..
astat4 is offline  
Sponsored Links
Advertisement
 
post #2 of 29 Old 12-21-12, 00:18
Tex2k2013
Senior Member
 
Tex2k2013's Avatar
 
Join Date: Aug 2011
Location: Austin, TX
Posts: 842
Thanks: 0
Thanked 1 Time in 1 Post
I can't answer your question definitively but I imagine the difference you felt was primarily due to the fact that air is denser when cold, as you pointed out that does increase power a bit.

'10 Tornado Red Street Triple w/ plenty of goodies
Tex2k2013 is offline  
post #3 of 29 Old 12-21-12, 08:48
DecepticonDon
BOTM Marshall
 
DecepticonDon's Avatar
 
Join Date: Jun 2008
Location: near Savannah, GA
Posts: 3,551
Thanks: 44
Thanked 9 Times in 7 Posts
Like Tex said, it has to do with the air being cold and therefore more dense.
Cold fuel actually atomizes poorly.

Side note: I like riding in cooler weather because the throttle response is so much crisper
DecepticonDon is offline  
post #4 of 29 Old 12-21-12, 12:25
Smoke
Senior Member
 
Smoke's Avatar
 
Join Date: Nov 2009
Location: France
Posts: 3,318
Thanks: 0
Thanked 1 Time in 1 Post
Yep, as illustrated by our super/turbocharged resident nutters, our bikes are restricted by air, and not fuel, intake.

The slower you move, the more dangerous your bike is... I'll let you work out the conclusion from there

If you find wearing proper gear's too hot, you're just not fast enough !


Dual Desert Eagle EBB ? MER IL ET FOU !
Viendez nolifer avec nous sur le salon #Airsoft sur IRC !
Et jouer avec Ploubalairsoft entre le 22 et le 35
Smoke is offline  
post #5 of 29 Old 12-21-12, 12:49
CitadelPilot
Member
 
CitadelPilot's Avatar
 
Join Date: Aug 2011
Location: Coastal NC
Posts: 188
Thanks: 0
Thanked 0 Times in 0 Posts
I remember back in the day racers would chill their fuel...especially in F1. I think it's due to the lack of vapor running through the lines, pure fuel.
CitadelPilot is offline  
post #6 of 29 Old 12-21-12, 13:31
Serious
Junior Member
 
Serious's Avatar
 
Join Date: Apr 2012
Location: seattle
Posts: 40
Thanks: 0
Thanked 0 Times in 0 Posts
Yes fuel like most fluids is more dense at colder temperatures.

Serious is offline  
post #7 of 29 Old 12-21-12, 13:58
wfire19
Junior Member
 
wfire19's Avatar
 
Join Date: Oct 2011
Location: Green Bay
Posts: 123
Thanks: 0
Thanked 0 Times in 0 Posts
If i recall correctly back from my automotive class in highschool... you want cold air and warm fuel.... Cold air is more denser you thus giving you more oxygen which is the key to the gas igniting, then you want warm fuel as it being warm helps the gas vapors atomize better allowing for it to mix better with the more denser air.

It follows the same principles, i believe, of using NO2 super cooled, dense air mixing with the fuel gives better HP....

please dont quote me any of this, this is just things i think ive picked up over my short years here on earth
wfire19 is offline  
post #8 of 29 Old 12-21-12, 14:48
Serious
Junior Member
 
Serious's Avatar
 
Join Date: Apr 2012
Location: seattle
Posts: 40
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by wfire19 View Post
If i recall correctly back from my automotive class in highschool... you want cold air and warm fuel.... Cold air is more denser you thus giving you more oxygen which is the key to the gas igniting, then you want warm fuel as it being warm helps the gas vapors atomize better allowing for it to mix better with the more denser air.

It follows the same principles, i believe, of using NO2 super cooled, dense air mixing with the fuel gives better HP....

please dont quote me any of this, this is just things i think ive picked up over my short years here on earth
Sorry that's not the case. You want the charge to be as dense as possible therefore colder is always better. Fuel chilling has been banned in almost all racing series for a reason.

BTW, cool fact, the mclaren SLR actually uses the AC system to cool the fuel before it's injected.

Serious is offline  
post #9 of 29 Old 12-21-12, 19:34
Dewilmoth
Member
 
Join Date: Feb 2012
Location: Kailua, HI
Posts: 185
Thanks: 0
Thanked 0 Times in 0 Posts
I'm not sure the info about cold fuel being better for power is correct. I know for a fact that turbine aircraft heat the fuel prior to sending it to the motor.
Dewilmoth is offline  
post #10 of 29 Old 12-21-12, 19:50
jardineD675
Member
 
jardineD675's Avatar
 
Join Date: Dec 2012
Location: sacramento
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Does it heat it for aircraft because of the freeze point and for high altitudes? Having it banned from competitions sounds like it def gives an edge.

Sent from my X10a using Motorcycle.com Free App
jardineD675 is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Triumph675.Net Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode


Forum Jump

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome