You may be able to check this on the supercharger, check the flap in the y peice and also where the hard elbow connects to the turbo as there is a o-ring in there.
No need to drain coolant to remove exhaust elbow as it is raw water which is injected at that point.
What rpm can both engines achieve max in neutral? Should be around 4250 rpm.
Check for boost leaks in the pipework between the turbo and the inlet manifold (soapy water solution in a spray bottle) is best for this.
Remove exhaust elbow from turbo and inspect the exhaust housing for corrosion...
Ok so it regulates the alternator output from the b+ terminal of the alternator.
Make sure all terminals are spotless and that alternator has a good ground, from memory thes are insulated return and the alternator relies solely on the black wire for ground.
When you a showing the 10v on inst...
Depends on what engines and the setup, ie battery sensing or machine sensing?
On the back of the alternator is there a yellow wire that either goes back to a battery positive or loops to the b+ terminal at the alternator?
Check for high resistance contacts on the sensing wire as this will affect...
Measure the voltage at the pump with it connected and switched on, my guess is the voltage measured will be significantly less than 12v.
If this is the case you have a high resistance contact somewhere, probably the switch.
Most common place for vaccum leaks is at the input shaft seal as it's only a single lip seal.
Lay it in such a way where you can pool some oil round the seal and try again
If it was me doing this i would :
1- check the oil and water.
2- turn it over by hand a few times.
3- hold the stop lever over and turn the engine on the starter until I see oil pressure on the guage.
4-release the stop lever and start the engine.
5- if it starts and all is good run up to...