Olav's question thread.

Ok, so i have just a few mechanical things to sort out before i fire this baby up for the first time and i hope you can help me with some input on that also.

Measured the CRIP the other day. Can someone tell me if this method will be accurate and safe enough to start the engine for the first time?

24 tooth crank wheel. Set cylinder 1 at TDC on compression stroke. Cranked the engine clockwise by hand and counted 28 teeth passing the TDC mark (stopped at the middle of the 28 tooth). 360/24=15 *28=420. I have set the CRIP, or engine speed reference offset in the M1 to 420. Will this be accurate enough to get the engine started? And most important, safe? I plant to have a timing light hooked up and ready to go as soon as i fire up the engine to adjust timing as soon as i get a stable idle.

What do you guys think about this approach?

Another thing, not really tuning related but here goes. The SR20's breather system is set up as follows in stock form. One hose connecting the crank case to the top cover. Hose on the right side of the top cover connected to turbo suction side, hose on the left side of top cover connected to the plenum with a PCV valve.

If i understand this correctly the PCV valve opens when the engine is in vacuum, and closes when positive pressure is applied and the hose connected to the turbo suction side takes over. It looks like this valve does not like high boost levels, and is prone to failing, and when this happens the boost pressure finds its way into the top cover and crank case creating a mess. What would you guys do in this situation? Plug it? Find a valve that can handle high boost levels and hope it does not fail? This car is a dedicated track car, so it will only see longer periods of vacuum when idling in the pits etc. All input is greatly appreciated.

I would just use your timing light while cranking with a starter motor (spark plugs removed, but grounded to the block, also injectors disconnected (or fuel pump disconnected)) to verify the Engine Speed Reference Offset.

Why didn't i think of that haha. Again, thank you for the input David.

Under the sensor calibration you have sensor voltage reference with the options absolute, sensor5v A, B, C etc. I have wired all my sensors so far from A. My common sense tells me to set this to "sensor 5v A", but then in the context it states "Select this for resistive sensors when Resource is 'Analogue Temperature Input 1' or 'Analogue Temperature Input 2".

And on the sensor 5v B it says the same only temp input 3 and 4. This just got me confused. Can someone verify that my initial reasoning is correct? Setting sensor 5v A on all sensors that have + and - from A?