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-   SV Talk, Tuning & Tweaking (http://forums.sv650.org/forumdisplay.php?f=111)
-   -   FIRE! Flaming awesome or burning out? (http://forums.sv650.org/showthread.php?t=163896)

Paul the 6th 15-03-11 01:27 PM
Re: FIRE! Flaming awesome or burning out?
 
I've seen an audi s4 which was designed to significantly over fuel on the over run to cool the piston crowns - this caused 12" flames to fire out of the back of it.

Used to get banging on my pointy 650 (not sure about flames) but I think it's just down to unused fuel getting through the system and when there's the right balance of heat/unburnt fuel/air introduced, the conditions are right for the fuel to ignite? Sure someone like embee or YC will be along with some equations to explain how & why it happens but that's my guess :)

Reeder 15-03-11 01:38 PM
Re: FIRE! Flaming awesome or burning out?
 
Mine only really does it at about 4.5k rpm in third gear :(

barwel1992 15-03-11 01:40 PM
Re: FIRE! Flaming awesome or burning out?
 
Quote:
Originally Posted by Reeder (Post 2501768)
Mine only really does it at about 4.5k rpm in third gear :(
accelerating ? or just on overrun

if its at 4.5rpm is prob's over fuelling at that point in the rev range mine does it at 5k theres also a flat spot there when accelerating

Jynx 15-03-11 01:47 PM
Re: FIRE! Flaming awesome or burning out?
 
Cheers for all the suggestions and comments.

It does seem to happen more around the 3-5k rpm mark and as mentioned above, there is a flat spot around there (or it just there is a power jump @ 6k rpm?).

It's a Beowulf exhaust - I'm afraid I have no idea on model as it was fitted by BlueWolf (previous owner).

Also I'm planning to borrow my mates gopro tomorrow to take a video for all who are interested :D

EDIT: Exhaust is actually a Remus!

Reeder 15-03-11 01:49 PM
Re: FIRE! Flaming awesome or burning out?
 
Only on the over run, and it doesn't happen massively often. It's only a few times each ride.

barwel1992 15-03-11 01:51 PM
Re: FIRE! Flaming awesome or burning out?
 
Quote:
Originally Posted by Jynx (Post 2501773)
Cheers for all the suggestions and comments.

It does seem to happen more around the 3-5k rpm mark and as mentioned above, there is a flat spot around there (or it just there is a power jump @ 6k rpm?).

It's a Beowulf exhaust - I'm afraid I have no idea on model as it was fitted by BlueWolf (previous owner).

Also I'm planning to borrow my mates gopro tomorrow to take a video for all who are interested :D
the 5k dip is for emitions and apparently its a fueling blip (about 10th hand info there :p )

Quote:
Originally Posted by Reeder (Post 2501778)
Only on the over run, and it doesn't happen massively often. It's only a few times each ride.
yeh almost like the fuel builds up ignites then the fuel builds up again then ignites again

Reeder 15-03-11 01:54 PM
Re: FIRE! Flaming awesome or burning out?
 
So if it's not doing it at any other time then perhaps my pair thing is blocked off or removed?

Jynx 15-03-11 01:57 PM
Re: FIRE! Flaming awesome or burning out?
 
Quote:
Originally Posted by barwel1992 (Post 2501779)
the 5k dip is for emitions and apparently its a fueling blip (about 10th hand info there :p )
Is this the thing I could stop by removing the 2nd and 3rd gear wires? I *think* the problem still happens in 4th...

toxic 15-03-11 01:58 PM
Re: FIRE! Flaming awesome or burning out?
 
This isn't fair, my SV never pops and bangs like that. You'd think with a full system it'd do it more?

barwel1992 15-03-11 01:58 PM
Re: FIRE! Flaming awesome or burning out?
 
Quote:
Originally Posted by Reeder (Post 2501784)
So if it's not doing it at any other time then perhaps my pair thing is blocked off or removed?
doubt it :/


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