So here goes nothing:
LZ22
Z20 Block
Z20S Rods (long rods)
Forged 86mm Pistons
A87 Peanut head w/ Z valves, .475 Cam, 1 5/8 intake ports Compression Ratio comes out around 9.4:1
Header w/ 2.25 exhaust
ARP Head/Main studs and rod bolts
Matchbox dizzy
Running a port matched U67 intake with EGR ports welded up and a 32/36 with .140 main/secondary fuel jets
160 degree T-stat
Noticed over the last few days I've been losing a little power, in fact I don't feel like I'm doing much better then my 52HP L20B anymore. Plenty of torque, not much power anymore.
In addition I've noticed today that on long drives after driving the truck under load at highway speeds it starts to overheat. Pulled the t-stat hoping it was the problem, but no good. Radiator hose is in good shape, radiator is fresh and clean as is the block.
I'm thinking I may be running super lean, but I'm not getting any pinging. I retarded the timing down to about 5 degrees to see if advance might have been the issue, but it made little to no difference, but made a little bit better power.
Idling the engine seems to cool itself efficiently. I'm running a 14'' electric fan and an engine mounted fan. No coolant in the oil or vice versa, but I'm going to compression test it later anyways, since it's only got about 300 miles on it so far after the first break in oil change... it runs good, and consistent but is a HUGE loss in the power department. I know my carb/spacer aren't very good for the motor to begin with, but this thing is BUILT and isn't making enough power to compete with a stock L20B.
Feedback??