Triumphrat

bradtx · 11-29-2006

Nick, I just checked the '04...vacuum nipple on the FPR hasn't a hose.

Brad

Stlakid · 11-29-2006

Well we've got it cleared up. Basically it doesn't matter at all! I will disagree that it will effect you fuel pressure if you have one connected to the air box. There will be no vacuum in an air box if it's working! Now if you had it plumed to the intake plenum that would be different or if you had a positive pressure from a turbo or other such device then the air box connection may come into play. For this setup it's just a different place to vent the regulator.

I know mine has NEVER had any connection there and the shop manual states to place the spigot facing down and has no mention of any connection to it.

[ This message was edited by: Stlakid on 2006-11-29 14:19 ]

11-30-2006

You are right :chug:

There is almost no vacume in the airbox, so the function of this connection will not work.....so it wil also make no diffrence if it is connected or not...
On cars( and on my previous RSV mille) the use this vacuum line, and yes it's connected to the intake manifold(After the throttlevalve) so it will richen under vacuum.

Hmmm good idea for an expirement

see what it does when connected to the intake...

bradtx · 11-30-2006

Flatslide, The FPRs I've had experiance with generally were:
fixed- a set pressure at all fuel flows
positive- pressure is raised when boost pressure is detected
negative- pressure is raised when low ported vacuum is detected

The Triumph's is the only one I've come across that had a nipple for a hose connection, but nothing connected. HMMM, though I need to look into it more, it might just be a poor man's barometer or altimeter. Less ambient air pressure could lower the fuel pressure and prevent over-rich running. I don't think the D955i's ECU has a barometer to modify the injector pulse width...like I said, needs a little digging.

Brad

11-30-2006

Just cheked the manual
and ther is a barometricsensor in the ECU conected whit a hose to the airbox.

so is still dony know what use it is.......to leave the fpr unconected
must be de polutionpolicy or something

pcn:

[ This message was edited by: Flatslide on 2006-11-30 15:01 ]