joed
Active Member
fresh stock pump, lifter preload is about a heavy 1/2 turn from zero, so .025-.030" give or take.Did you install a high volume/pressure oil pump when it was reassembled?
How much actual lifter preload do you have?
TIMINATOR
fresh stock pump, lifter preload is about a heavy 1/2 turn from zero, so .025-.030" give or take.Did you install a high volume/pressure oil pump when it was reassembled?
How much actual lifter preload do you have?
TIMINATOR
The plugs are not uniform.
power logger includes WBAFRI take it you have no way data log what the car is doing?
Chuck said same thing. I feel good about cam sensor, rebuilt and set myself with caspers tool, will recheck however. If I pull front cover, how do I know what I'm looking at with cam alignment and timing set? Do i need to rent a degree wheel? Or just check centerline on #1 TDC?I would verify the timing on the set and on the timing mark as well. Make sure the cam sensor is not 180 out too.
You can set it 180 out with that tool, too.and set myself with caspers tool,
OK I pulled the cap off the cam sensor and rotated the motor to make sure I was on number one compression then moved to my 1-15/32 aka 25 degree after timing zero and the window in the cam sensor wheel is facing the power steering gearbox so that should confirm cam sensor.You can set it 180 out with that toll, too.
Not a good choiceThe old plugs are NGK UR4(not a good choice?) I have and will install a fresh set of AC cr43ts
Thanks Timinator. I agree. Heads are essentially brand new champions (maybe 20 hours street driving) and part of last setup. Everything is same as last time when it ran well so I agree cam setting could be suspect to me. I wanted to just put some data up before I go after front cover removal next week after NATS.Rather than fixate on cranking compression, try and isolate what any possible differences are between when the car ran well and now. Including what could have changed when the engine was remachined/repaired and reassembled.
A larger cam or differences in degreeing, or if the cam is one tooth retarded, will affect cranking compression, but not leak down.
JMHO TIMINATOR