So, as i keep finding some surprises, and life gets in the way, This project keeps evolving. I recently found out that i would need to buy my mother a house, So the budget got smacked down a bunch.... Tentatively I'm planning to rebuild the bottom end, And running these stock J heads, if they check out OK.
In the future i'm planning on updating the heads. Likely a set of Edelbrock RPM heads.
Edelbrock performer RPM intake.
Im using an online calculator, by Wallace Racing to help me figure out compression ratios / cranking pressure.
So far, i have been comparing the Icon RHF +7cc forged pistons. The Icon +9.6cc dish, and the KB +5 cc flat tops. and the edelbrock 65CC heads. Likely Scat
Scat Pro Comp I-Beam Connecting Rods 2-ICR6123-2124
If anyone has a negative experience with these rods, let me know. They seem like a nice upgrade, without too much cash.
My goal is to build an engine, that will safely use pump gas, and later on swap to aluminum heads. Earlier on i toyed with the idea of a blower, But i have gave up on that idea. Im going to keep a carb, and make a great NA driver.
Here is an example of the data from the Wallace racing calculator.
View attachment 1715685649
Im not sure about the 2 sets of data, The cranking pressure VS the gauge pressure. I used a different calculator online to get the different static compression ratio numbers.
This example is from the Icon +7 cc pistons, with a 0 deck height, .040 head gasket, and a Comp Xtreme energy cam.
Maybe this cam is still too big for the street driving i want to do. the next lower 262 cam is also on my radar. Its a 1300 - 5600 cam
Grind Number: XE268H
Engine Family: Chrysler 273-360 c.i. 8 Cylinder (1964-2002)
RPM Operating Range: 1,600-5,800
Cam Type: Hydraulic Flat Tappet
Lifter Style: Hydraulic Flat Tappet
Camshaft Series: Xtreme Energy
Camshaft Gear Attachment: 1-Bolt
Usage: Street/Performance
Valve Springs Required: Yes
Camshaft Material: Cast Iron
California Proposition 65: WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Advertised Intake Duration: 268
Advertised Exhaust Duration: 280
Intake Duration at .050 Inch Lift: 224
Exhaust Duration at .050 Inch Lift: 230
Intake Valve Lift: 0.477
Exhaust Valve Lift: 0.48
Lobe Separation: 110
Assembly Lubricant Included: Yes
Intake Centerline: 106
Lobe Lift Intake: 0.318
Lobe Lift Exhaust: 0.32
Valve Timing @ 0.006 Lift:
Exhaust Close ATDC: 26
Exhaust Open BBDC: 74
View attachment 1715685668
Intake Open BTDC: 28
Intake Close ABDC: 60
