Loud pipes save...

[the_lone_wolf]

...fuel?

After fitting my new pipe and filling her up i've now managed to do 140 miles before the light came on, normally it would be 110-115 miles

anyone else experienced this? i'm sure some of it is to do with being gentler with the right hand, but 30 extra miles? surely not

also noticed a couple of other things, when you start it cold it tends to hunt for a while around idle, and stalls very easily. also (and i think it was mentioned in another thread tonight) it seems to be a bit slack around the mid range, although the top end feels quicker, how much of it is just perception i don't know

the pipe is essentially straight through from the cut in the original system, no baffles at all, perhaps time to go find a dyno and get the fuelling set up differently?

I'd guess your running a touch lean maybe.

Dunno...sometimes i struggle for 120 miles before the light comes on, the other week i got to 142 and the light didnt come on...

...so i guess its possible...

Matt

shouldnt it be the other way around? and use more fuel?

[the_lone_wolf]

Originally Posted by kwak zzr

shouldnt it be the other way around? and use more fuel?

i can't see how it's affecting the amount of fuel used at all, since the SV has no feedback mechanism to adjust the fuelling to suit the airflow surely the injectors are firing just as they did before, it's just the airflow has increased due to the lack of back-pressure, increasing the air:fuel ratio

tbh the fuel consumption doesn't bother me either way, but i'd prefer not to have the bike running lean...

If it's hunting and lost some midrange it's probably running lean - i'd get it dyno'd.

[the_lone_wolf]

Originally Posted by jonboy99

If it's hunting and lost some midrange it's probably running lean - i'd get it dyno'd.

i figured as much, so much for scorpion saying it wouldn't need it...

ho hum, anyone know likely cost for getting it done properly? can they use the stock ecu or am i going to have to buy a power commander etc etc

anywhere close to portsmouth/soton that comes recommended?

[Stu]

From what I've heard ( I believe from SV650Racer for example) running lean (which will damage your engine) will in no way show up in your economy. So there's nothing good about it.
I would say you've been frieghtened by the noise & kept the revs down. Strange, as I loved the noise & kept the revs up, specially in tunnels with a Police bike behind me

i'm with Stu. Dont wanto be running lean - bad.

fwiw - mines was the same after i fitted my fuel can. After a few weeks it just disappeared. prob placebo effect. I thought hunting & seeking ony affected carbs? Mind you I'm fecking pished just now so take it with a eec mountain of salt.

[the_lone_wolf]

Originally Posted by Stu

I would say you've been frieghtened by the noise & kept the revs down. Strange, as I loved the noise & kept the revs up, specially in tunnels with a Police bike behind me

i'd probably phrase it more like "being considerate to the locals by keeping the volume down in towns and villages" as opposed to frightened by the noise



cheers for all the replies regarding the fuelling, general consensus seems to be that steve jordan mc are pretty good and will map straight to the stock ecu so a trip to boxhill might be in order one saturday...