Inlet manifold problems.

[gzus11]

Can anybody shed any light on my problem?

I am part of Strathclyde formula student team, recently we have converted a Honda CBR600 FX form carbs to injection.
last week it was on a rolling road dyno to have the ecu maps tuned. Apparently when the throttle was fully opened the inlet manifold blew off with lots of flames, and i think a clean set of overalls for the dude.
he said this happens every time its opened up.

We have four injectors one in each runner into the head from the plenum(plenim......?) chamber, it seems the ecu sets them all open at the same time (open as each valve opens) this dosent seem right to me but thats what we have. we are also have wasted sparks.

We had it running in our lab and there was no probs but it only ran idle for less than a minute.
does anyone have any idea why this horrible problem might be happening, and/or any ideas how we can prevent it from happening altogether?

[gzus11]

yes it was. it should be back together set propperly.
i think the guys doing it knew whwt they were doing we had the manual aswell. is it possible there is too much fuel in the intake manifold?

[gzus11]

we have only got a crank sensor and throttle sensor, plus the usual lambda, air pressure and temp, water temp sensors. we had to make a new spider wheel thing with more fingers on the crank sensor.

am i right in thinking fuel pressure is set by the regulator, does the ecu have any say on the fuel pressure?

we had the engne running fine on the carbs, suggests the valve timing is acceptable. Could it be that the valves are not seated propperly?

we got the ecu from DTA i think so should it matter that all the injectors open at the same time? or does this just reduce the fuel efficiency?

[gzus11]

the whole thing has been heavily developed and researched(not by myself) as a 4th year project. the new toothed wheel is the same gap as the original from the engine, the new ecu needs more fingers but the first and last are on the same geometry relative to the crank.

The crank sensor is also the ignition pulse generator.

does the ignition timing need to be different for carbs and injection? we have the ecu plugged into a laptop and i assume tdc is correctly set. is it best to just get a basic map and fiddle it for better performance, or is it possible to get them anywhere on the net? i dont know any of the fuel mix or spark timings.

the car is with a guy who is supposed to know what he's doing, but im not too sure that he does.