QUOTE=devonmikeyboy;1228414]Thanks Muddyboots
. Going back to Interpro on 3rd February to try out a few ideas and hopefully by then the peak boost will be raised as the car is only running about 2 bar peak and 1.8 constant when the VT5 can peak at 2.6 bar and run 2.2 constant. Also going to a RR day at AwesomeGTi on March 20th plus the car is getting a write up in the February issue of Audi driver. My new goal is 350bhp with this set up and 400bhp is a nice round figure to aim for when/if the new injectors and turbo setup get fitted.[/QUOTE]
When is the propane plus Nos coming in to the equation is it on a switch or on the throttle at wot , by the looks of the map you have in there giving only 1.8bar which sounds like a standard boost map/level for the Vt2 , although the bigger comp/turbine wheels will give more flow would suggest its not the best map in the world.
This and the fact that the power band is so short and peaky , the peakyness suggests again that the propane and Nos are introduced at somewhere just before the standard injectors have given up the ghost , at this point you/your tuner will find it very hard to raise the boost pressure with the Nos turned on because the Nos is taking the fuel away from the turbo for it to act/react upon.
I say fuel meaning both the diesel and propane its all the same when in the mix , so i would think the best way of having it setup would be to have which ever fuels your using mapped together as one/collectively , then map the boost pressure against this if at this stage the boost pressure made by the turbo is at say 2bar and if there is still an excess of fuel/smoke left then the Nos can be switched on to clear the smoke and give more power.
The propane can be turned up here also but would think the Nos would get there before the turbo could react upon it giving more boost.
You would then be able to get/have more fuel injected down low by both fuel types and have better boost responce and power at this point , even if your able to buy larger injectors at 20% more flow they would run out of steam at the levels you want/are at .