Exactly so, but the reason we have always done it this way is that we can balance the power lost by over-retarding the ignition, with a larger start % and come up with a nitrous ramp that starts at "zero" power (hope that makes sense)
It also makes for one less "variable" meaning we only really have to worry about delay, start % and build time- one less ball to juggle.
What I was explaining above is the fact that we took 6 degrees out on transbrake release instead of on nitrous activation- 0.4 seconds earlier than we should have!
I understand what you're saying and what you're trying to achieve but I can't agree with the way you're doing it.
I can understand a single initial retard at the start but not an additional one.
If you want a lower start power you should first of all set the start power to 20% rather than 25%.
You also have the following options to have a lower start power level;
1) Have you optimised the Pulsoids adjustment?No. not at this powel level2) What frequency are you using?
25hz3) Using a lower frequency allows you to use a lower start percentage.
Yes4) However, the higher the frequency you use the smoother the power is delivered and the kinder it is on the engine.
Yes5) To get the lowest start percentage, lower the frequency to whatever compromise level that works for you. The compromise is between getting the lowest desired start percentage and the manner in which it is delivered.
Yes6) If that does not achieve your goal, give me a call as I have a novel (secret) way of converting your existing 20% to 10% and we used this trick on Dave Bailey’s bike with great success, up to switching to the REVO system.
Will do if neededThe reason these options are FAR BETTER to use than retarding the timing, is that you are WASTING nitrous PRESSURE that you NEED FOR THE REST OF THE RUN.
Nitrous pressure traces are interesting....Only got it working properly for the last two runs (dry soldered joint in the sensor wiring)
Example:
Launch pressure: 969psi
activation pressure: 985psi (maybe g force acting on the sensor?)
after 0.5 seconds : 960psi
after 1.0 seconds : 971psi (recovery bounce?)
after 2.0 seconds : 936psi (system @ 100% now)(lowest pressure point)
after 4.0 seconds : 963psi (gentle recovery)
after 7.0 seconds : 952psi (very slow, steady pressure loss)
3 seconds after the throttle is off, nitrous pressure is climbing over 1000psi! talk about a quick recovery!Using nitrous to maximum efficiency over the early part of the run allows the rest of the run to be more efficient and accurate.
BTW I realised what you meant by the switch to the trans brake operation. [/color]
As far as the launch is concerned, there isn't going to be a huge improvement.
Quite possibly BUT for the reasons just given, it’s still much better to get the maximum efficiency from the nitrous settings. Saying that, there are gains to be made- I'll add a separate post about our plans for next season- I would like to think we can run a high 1.1 second 60ft on a good track- I suspect that's as far as it's possible to go without wheelie bars
I’ll look forward to reading that. My gut feeling is that, track conditions permitting , we can run in the 7.6s by refining what we've already done, without having to add any more power
Couldn’t agree more, especially as that 7.8 was SO EARLY in the R&D track and you were still in the ‘find the bugs’ period and the ‘lets play well safe’ period because you were just getting to know where to start from. 
