why are my exhaust flames blue? i am running 93 octane, but i wouldnt think that would change the color of the fire from orange to blue... anyone?

 

It just means it's burning hotter, either advanced timing, runing leaner (replaced your plugs didn't you?), and etc.

 

proper burning makes blue flames? :o)

 

well i'm running stock timing, however i am running all 7's for sparkplugs. i just dont know why it would be much hotter..

 

could be your exhaust, the time of day, how hard you were running it. etc...... the hotter the gas, the more towards a white light. So after blue it would go towards a white, if it got hotter.

 

its night. nice and cool outside.

 

Buy a turbo :-D

 

Change your plugs Jacob!

*edit* Why are you running 91? Its killing your performance in your N/A/

Jarrett

 

Are you serious?? Higher octane kills performance in a rotary?? I run only 93 in my TII

 

Run as low of octane as you can get, only use high octane for turbocharged (or supercharged) motors.

 

yeah, higher octane gas burns slower so in an n/a rotary you wont get complete combustion so the car will not run at its peak performance

 

great..im good to go then...i got boost fo'

 

i heard the higher the octane, the bluer the flame will be.

 

i run 87 and my flames are huge (depending on the rpm they shoot) and the nice and orange, but during shifts i think i get little blue puffs in my exhaust

 

my car doesn't flame much. I even have the BOV vented to the atmospher, and the Racing beat 3" exhaust. stock boost.

 

low octane = burns faster, harder and more violently.
high octane = more controlled burn, slower making more even and less shocking combustion.

you'll want as low an octane as you can get in an NA but TII's need high octane to prevent detonation from all that compressed air. switch to 87 jacob! you're not hurting power at all, just wasting $

 

I get 1'-2' flames when my car is really warmed up. I guess there's usually quite a bit of blue at the base, but I have yet to see it myself. All I see is the whole parking lot or street light up for a second, hehe. I always run 87. Icemark will tell you the same thing: lowest octane for N/A, highest for turbo.

 

I think blue flames woudl be cool if they werent fake (2f2f)

 

hehe pink flames ala that S2000...ick

 

This was answered, but just to elaborate...

You WANT to run higher octane in a TII. This helps guard against detonation.

The N/A on the other hand, you want to run LOWER, in fact you want to run the LOWEST possible. Lower octane burns hotter, and faster. Hence the problem it has for TIIs. Its more prone to pre-ignition.

Jarrett

 

i'll go fill up with some 87 today.

we almost put some turbo blue in the car the other night just to see what would happen (its 109.5 octane btw) with it burning so much later than regular pump gas. hehe good thing we didnt.

 

Yep,

Cause if your car isnt designed to burn the extra octane, you are just robbing yourself of HPs.

Jarrett

 

how much power do you all think i lost just from using 93 octane as opposed to 87?

 

Well, its hard to say. Common misconception is that higher octane = power. This isnt true. Higher octane means harder to burn. What does that mean? It can be compressed more before it spontaneosly ignites (pre-ignition). This is perfect for cars with high compression, or cars that are forced induction.

Your car on the other hand cant/doesnt need to utilize this feature of high octane. So if anything, your getting an incomplete burn AND your risking carbon deposits. If your timing wasnt stock and you had lots of mods, that might be another story.

But how much power you lost? I dont really know. Only the Dyno could tell you that.

Jarrett

 

i know how the whole higher octane thing works. and i know i wasnt gaining any power from running it. we pretty much did it to see what would happen with the exhaust flames.