Hi braad
A very long story short, it's going really good now. A little bit hard to start (cold), but now idles nicely at 1000rpm, doesn't mind crawling through 50k or 60k traffic in forth. And with the 3.1:1 diff travels the highway at 115kph (using a GPS) @ 3800rpm. And I haven't been game to go past 140K's
Building the twinky was easy, getting it to run has been frustrating. The biggest problem was the lack of injector size. The 370cc injectors worked a treat. The other major problem was the MicroTech ECU (the back up support was like trying to get blood out of a stone
) would use a different one next time.
The ECU uses two types of sensor to control fuel MAP (manifold absolute pressure) TPS (throttle position sensor) and a combination of both. I'm no expert here but I have learnt a lot trying to get it right.
Because of the bike head and quad TB's the vaccum is eradic (therefore poor idle). Microtech manual suggests switching to TPS only (fixed idle) BUT, the TPS was going from closed to WOT (wide open throttle) at quarter throttle, therefore dumping heaps of unnecessary fuel in at cruise so most went out the exhaust and all over the back of the car. No adjustment in ECU to calibrate both Zero and 100%. After one of my rear ocassions where Mircotech reponded to my email they suggested MAP would be better, but with a vacuum distribution block. Which consisted of four equal length hoses from each TB into the block and one hose to the ECU. And now the ECU takes reading from ther MAP and TPS.
From that point we were nearly there. I would just like to say I didn't work all these things out myself, I spoke to numerous people from this forum, far more knowlegeable than myself, and each piece of information I received started to make sence. Thank you to each one of you, those I have spoken to know who they are.
I was asked on Sunday at MITG Show N Shine by more than one person, "Was it worth doing?" my answer was, "To be honest, two weeks ago I didn't think so, But now it's a real buzz and I'm loving the way it drives!"
Steve