Exhaust Cam Position At Tdc

[Richie-Van-GTi 71 2 Cars]

I think Ive pinned my engine problems down to cam timing as at TDC the inlet cam is only about 10 degrees from fully open makes me think a lot of the duration is spent letting exhaust gases out instead of fresh air in , anyway I have the specific lift at TDC for this but not for the standard exhaust cam on the xu10j4r, does anyone happen to know it as clearly the woodruffs and lock pins are a bit out of synch.

[Richie-Van-GTi 71 2 Cars]

right sorry for the ramblings, my heads a bit stuffed at moment with this damn car. Does all the following sound plausible?

 

table of how the engine runs:-

 

1.......................3......................4..................2.............

....

Fires..................Compresses.......Intake..........Exhaust........

Exhaust.............Fire....................Compress.....Intake..........

Intake...............Exhaust..............Fire..............Compress.....

Compress..........Intake................Exhaust........Fire..............

 

Assuming I have that correct then the bottom end is turning at 2:1 with top, IE bottom end does 180 degrees and top does 90. And following the firing order etc this means the start of the exhaust cam is 90 degrees behind the end of the inlet cam? Also ideally I need the inlet valves to be fully closing at the bottom of the intake stroke and the exhaust valve to be at the start of opening at the bottom of the firing stoke? Or do I need to be looking for some overlap somewhere?

[Sandy 191]

The inlet stays open beyond BDC into the comp stroke.

 

The exhaust opens before BDC on the fire stroke.

[Richie-Van-GTi 71 2 Cars]

Ive set the inlet to the measurements given from petert when grinding the cam, then locked that cam on the locating pin and set the exhasut cam from there using its pin and the belt. Double checked everything using a new Dti and its all spot on, it now cranks with even compression and speed, no valve contact etc. But it will only try to fire on 2 for some reason ecu is only triggering one side of the coil again. Fingers crossed this time tomorrow it will all be running properly

[Richie-Van-GTi 71 2 Cars]

problem found, Id missed a link out meaning its only ever run on 2, starnge though it sounded nice on 2, cant wait to hear it on 4