Great news!!!!
We started tests on Dave's bike and found a VERY IMPORTANT problem that's adversely affected ALL this years performances.
Although Dave has only had good weather for a couple of meetings this year and only had a few full 1/4 passes, those have not produced the results we expected. For the last 1/2 of this year Dave has been assuming that the Revo system has been running too rich, causing the engine to missfire as the flow of nitrous was increased by the Revos.
He was lead to this assumption by the O2 sensor and plug readings.
At the start of this year he switched from a combined Schnitz progressive/ignition system to an MSD ignition (for the wide range of retard it offers), on the assumption that the spark strength would be as good if not better than the Schnitz.
Prior to the last couple of meetings I asked Dave if he was sure the ignition strength was OK and he assumed (due to the good name MSD have) that it would be.
I still had my doubts, which is why it was the first thing I checked once we got the bike up here.
The results of the test PROVE that the spark strength was NOT EVEN ADEQUATE for a strong n/a engines requirements!!!
I can't begin to count the number of times I've said to different customers, that a weak spark produces the same symptoms as over rich mixture.
All year we've been trying to rectify a relatively minor mismatch between fuel and nitrous flow through the Revos (which I could NOT imagine was adequate to cause such a problem), when in fact the ENTIRE PROBLEM has been the ignition system producing an inadequate spark.
Why any MSD unit is producing such a weak spark we have yet to determine (Voltage to the unit is good) but we will find the cause and rectify it, so that Dave has a monster spark for the start of next season.
The lesson is NEVER ASSUME ANYTHING!!!!
We ASSUMED the MSD would do the job it was designed for and we ASSUMED that we'd have some problems to overcome with the Revos because it was a new concept.
We were WRONG on both counts!!!!
ROLL ON 2008.