what would be your diagnosis?????

SLOPAR72 said

So with your Vacuum reading is telling me that this is a "HOT" street engine. I probably missed it but what exactly is the true static compression of the motor and also what is the stick in it exactly?

When you say good compression and leakdown what are the numbers?

JW

Click to expand...

1. True static is 9.8:1. Compression is 165 psi roughly all around with one cylinder being 155 psi. In my opinion that is not enough difference to cause this type condition.

2. Leakdown at 90 psi, the gauge drops to 87 psi and that is with the engine stone cold.

3. Cam is comp cams brand XE275HL. Advertised duration I- 275* E- 287* I&E LIFT IS .525". 110* lobe separation 2000 to 6000 power band