Sunday 30 August 2015

cranking test!


Quite a nice milestone this one. Had a couple of hours spare this morning so rigged up a battery direct to the starter motor, as I hadn't actually tested the motor and solenoid which came with the 2nd hand (but only 19,000mile) gearbox. 

Cranking the engine over allowed me to visually check that the alternator mounting looked ok. It looked fine, but the real test of my pulley will be once the engine is running at full speed.

The cranking test also enabled me to check my oil circuit. The pump seems to be priming correctly and even at this slow speed cranking I was getting good oil flow around the circuit and back into the dry sump tank. J


Worth mentioning: the cranking is such slow speed as I am using a knackered old battery from my road car for the testing. It still holds charge but drops down pretty quickly under load. You can just about see in the image from above, the multimeter reads 14.2V, under cranking this was dropping down to 10.5V or so after just a couple of seconds. I will actually be running two batteries in parallel on the Exige as I have figured out this is the lightest way to achieve the CCA (cold cranking amps) I think I'll need for this large, high compression V8.


Quick vid of the alternator pulley during cranking:


No comments:

Post a Comment