Viva GT Electronic Ignition
Okay so the fuel injection is in place (awaiting fuel lines) so now it’s time for the ignition system. The first and most difficult part I am tackling today. The crank position sensor (36 pin out wheel) mounts to the block, using two existing studs, but those studs normally hold the automatic cam belt tensioner. I have to remove that and replace it with the manual adjuster version so that these mounts are freed up. All sounds simple enough except my block doesn’t have the needed extra hole for this new adjuster. Simple drill a hole and tap it, very simple when the engine is out on the bench, except it isn’t!
One visit to the tool shack and I have this contraption:
Get the engine all timed correctly, undo the various pulleys, remove them all till I am back to the bare block, last add the steel guide template.
Next I had a coffee (and a sly egg sandwich), found out my partner in crime wasn’t well, so cracked on alone and drilled the 6mm hole. Much anxiety was had and that block even though alloy was rock solid!
After cleared things up a bit, I went to the cupboard for my Tap and Die set to find (short memory loss) I only have an imperial UNF / UNC kit and I need an 8mm tap.
So one quick last job of the afternoon was to swap out the timing belt pulleys, as they are off why not? the original engine had the square tooth pulleys and belt, the later High compression engines (to which this now is) had the rounded tooth pulley and belt, which from reading is supposed to last longer and handle the increases in BHP without the risk of belt slippage. There are four pulleys in total, so far only done the two cam pulleys. The other have to wait till the tensioner bolt hole it tapped.
Also the tart in me likes the new black anodised finish and the stainless captive washers unlike the old bare alloy and painted steel washers. Yes image is not as important as function, but when I can have both why not.
I now need to pop to the shops for an 8mm tap, so there maybe more to report later on this part of the build.