dynojetting
james h - 9/2/09 at 06:48 PM
I have a carbed R1 in my part built MK, already thinking about power increases 
So, what exactly is dynojetting, and what sort of increases could i
expect?
Thanks
James
BenB - 9/2/09 at 06:51 PM
Dynojetting is just putting the right jets in the carbs. Power increases will depend on how bad the mixture is at the moment!!
mistergrumpy - 9/2/09 at 07:00 PM
Aye dynojetting is not really a performance upgrade. I have jetted my carbs because I have changed from bike exhaust to BEC exhaust and I now have a
sausage filter so it throws the fuelling all out. The dynojet just corrects this by using different sized jets and needle settings.
james h - 9/2/09 at 10:38 PM
Ok thanks, so do you think it is worth it after installing a bike engine into a locost? Or should it be fine already?
idl1975 - 10/2/09 at 09:16 AM
quote:
Originally posted by james h
Ok thanks, so do you think it is worth it after installing a bike engine into a locost? Or should it be fine already?
Yes, it's worth it. However, ideally it should be properly set up on a dyno by an expert. Proper jetting by said expert, especially when
you've put an open filter and a bloody great BEC exhaust on the engine, will correct the fuel/air ratio for part and wide-open throttle. You
will see better throttle response, probably improved fuel economy, and a smidge more power.
People often look at dyno charts for DJ kits with the usual WOT fourth-gear roll on curve and see only 2-3 bhp difference, but that doesn't tell
you what's happening to F/A ratio at part throttle, where even in a BEC you will spend a lot of your time.
Doing it yourself you'll probably be able to get acceptable WOT performance, but you won't have any accurate idea what it's doing on
part throttle. So the best thing is to talk to a specialist and see what they recommend. Some may use stock keihin or mikuni needles, some may use
Dynojet and some Factory Pro.