Bylkins Brent I have a set of Edelbrock heads with a ton of work that flow 386 intake and 368 exhaust. They have been welded, sparkplug hole moved, .200" height on the intake ports, about the same to the exhaust of weld and fill. Valves are 11/32 at 2.25 and 11/32 at 1.75. The floors are filled in half way to the valves. Have had the heads on 2 different flow machines and both come within 1% of these numbers. The ports are based on KCR stage 3 programmed. Looking at going to 5/16 or 8MM valves for a little more flow and a different back cut for a little more flow under the .400" lift. Have to have my intake welded and raise the intake ports also.
My understanding is that Blue thunder heads with again alot of work where flowing at 400cfm or was this just a story??
Cleve motors, oiling system needed a ton of work. Glidden and Gapp both had the answers for this motor with
oil control. They also turned between 8,900 rpms and 9,400 rpms. They ran 5 weight
oil and got about 25 runs before teardown. You have also learned about
oil control for this motor. I never hated this motor until Gliddened cleaned house in prostock with the Fairmont. Covered the field by .1-.3 tenths of a second. the rest was clutch setup. He had and his son still used a concrete launch behind the shop. Billy still will get your car in the 60 ft time of .2-.5 tenths faster with adjustments. Cleveland head and port could flow a ton but sucked at idle to about .300" lift then away you go to .700"+. Only maintainance I saw from Sr. Glidden was a valve spring swap at E town and clutch adjustments. Motor was never apart. He did carry spare bullets.
Going to 2.0 rods is great, less rotating weight, lighter crankshaft. Rock and roll.
I have not on purpose tryed to run a motor at 150 psi and would have no reason to do so. I do know that fram filter blow apart in the high 130's. This was on another motor.
Lossing HP with thicker oil, yes 100% correct. Again if I was looking for every last hp would build a motor to turn 7,500 rpms, run .904" solid roller lifters and about 650 pound valve springs and have a motor with a short life. Oil would be 0 weight or a 5 weight. I didn't like turning hemi's this hard and don't like turning and FE motor this hard either. I have a heart and after spending about 80-100 hours building a motor, I am not out to destroy it on breakin.
I think you missed the part about the oil pressures being in the 120's on cold startup only. Like you I run a 70-85 psi at 5,800 rpms. The lifters are pumped up and have a small fall off of power but still pulling. My rod bearing look just like yours you showed. We are both on the same track. Side note, stop stabbing your finger with a pick.
. Thanks for the weather report.
Going to woodward cruise this year in Aug, have a week off, may stop by and scray the ---- out of you.
Lifter bushing can go either way. Correct angle to ride on the camshaft. Having the lifter bores centered to aline with the rocker arm. Correct spec of clearance for max lube or to control oil to the lifter depending on what style, solid or roller. My shelby block has bronze sleeves in them with hydro roller.
Last note, I find it hard to believe that my heads are 8years old and flow about the same as the latest designs. My combustion chambers are not heart shape either. Recommended compression is 11.50 to 1 with a small wedge dome I am waiting for Jay B to give a call with the PSE lower intake manifold. I am looking at running a rev kit and run lighter valve springs on the valves. Isky had a kit about 45 years ago, but it was ugly.
Last thing you said you have 55 psi at the back of the block, and my brain is fuzzy where is the port for the gauge compared to the inlet of the block? If the inlet is at the other end you are running about 70 psi. We are at the same numbers. Tunnel ports IMO are a poor design with the air deflector for around the pushrod. I think a good set of HR heads are only couple of cfm's behind tunnels. Not 100% sure, need more research on this. Hey got to go, Good info. Rick L. PS I am the lucky one and only build for myself. You have to answer to some people who don't take care about there motors and over abuse. This is 1 main reason I couldn't ever build motors for a living. the first bang off the rev limiter and I am looking for a torque wrench to swing. Selling your childen is the other problem. I figure you loss about 1/4 pint of blood on each motor from edges. I now grind all surface edges smooth, saves fingers and cuts. Later Rick