Pi22 yUP - The next phase

[RB2]

Managed a little shed time today, so I've continued with dismantling the other engine. I am going to need to get some boxes to organise the bits and clear the work bench. Also had a visit from the dog.

There couldnt have been much flow through the head

 

[RB2]

So now it's a bare block.. time to work out what's next

 

[RB2]

Giving the block a closer inspection and I can't see any evidence of cracking or scoring on the bores, so I think this will be OK to continue with. Whilst I work out the pistons to use, I've brought the block outside for a bit of a wire brush, degrease and derust.

 

[RB2]

After the rust treatment and a bit of a wipe down.

And a coat of black enamel.

A fine Sunday job

 

[RB2]

Lots of clean looking bits now. I've reached out to metric mechanics, so hopefully I'll have a plan on the next bit shortly..

 

[RB2]

Progress has slowed as I've been using the car. I am still compiling bits for the sc.

I've sourced some spacers to let me use standard injectors oppose to the air shrouds

I've sorted the heater resistor so i now have 4 settings. Dogs hung out whilst i did that.

Decided to change the rocker today. A red one adds at least 5hp.

It was also treated to some new oil, the sump plug parted, so It was an easy out to the rescue.

 

[RB2]

So i am back onto the supercharger. I've started ordering up some of the pipework needed and the bypass valve.

The intake pipe work will look something like this and the two left are going to be charge to the cooler and charge from the cooler..

Part of the puzzle is the bypass valve. Now I had in my head that is would be open and by pass the charger when at idle and no vacuum. I've bought a bypass valve for a mini to use as its a little self contained unit including its own vacuum line. The puzzle is its closed unless it sees vacuum?!?!

I was planning on cutting into the charged side manifold here..... (vacuum inlet is on the noncharged side)

And then tee into the intake side over here... albeit with a smaller tee and a bit more refinement.

If anyone know what they're doing with supercharger recirc valves, please jump in before I start cutting holes. Potentially the pick up for the vacuum is on the wrong side going by the hyde schematic below, but when used in the mini configuration, the valve backs onto the charge pipe I believe.

Also thanks very much to IainP for thr speeduino board and ecu. So far endless hours of reading.

 

[IainP]

With supercharges the bypass valve is usually used to bypass the charger completely at idle Richie. So normally closed, but opened with vacuum, idle and steady state, when the charger is not really needed. It’ll close as soon as the throttle depressed, sending the airflow through the charger completely. Also means when the throttle closes at high revs the engine doesn’t get boost, or surge, when the car is trying to slow down. I think some of the Eatons have it built into the rear casing.