Originally Posted by ccperf721p
If I remember correctly, Ron's barrel valves do not bypass fuel to the return line with the shutoff, it merely closes off the supply from the pump. If this is the case and you are taking your reading from the pump side it will not show nozzle pressure. Also you will get a big spike on the gauge when you lift off the throttle.
About the only time I use fuel pressure to reference anything is after the initial tuning is done I will throw a gauge on the nozzle side to get an idea of what pressure to start with on the high speed.
Most of injection tuning is by feel and time slips, you have to have a place to start so you use the basic measurements, barrel valve setting etc etc to get it running.
I agree with this,depending on which barrel Valve you have, it would have an idle bypass?check valve spring of about 15 lbs, which is closed off as soon as the throttle is cracked open about 15/20%. As hammer said the blue header could be either a lean or fuel burning in the header. I never have that problem
because i ddon't use crome headers (sorry just being funny) I think the best thing would be to get it too the track and try some of the changes you have made. It's really hard to melt an engine down on a normally asperated engine, they either run good or they sputter. i'm not talking about a blown alcohol engine, because you can melt one down in a heartbeat ( I've done it ) Another thing comes to mind, most people run a spacer plate on the manifold this permotes better distribution in the manifold. I don't know if you are running one or not.
JMO
Zip.