Edelbrock aluminum heads 60179 or 60779?
Ok, back to it. I got the old iron heads off the 340 and measured the piston to deck clearance and sure enough they are .018 out the hole.
I got the closed chamber Edelbrock heads here, so now onto which head gasket to run and which cam.
Since I have the engine down this far, I have the opportunity to upgrade my cam. My dad has an unused cam up for grabs, , it's as follows:
Comp Grind: XE274H-10. 20-224-4 (cam card attached)
Lift: 488/491
@.006 274/286
Valve timing @.006:
Installed @106
@.050: 230/236
110 lobe separation
OR I run the current can I have:
CRS 268H-10 Cam card also attached.
.454/.454 lift
@.006 268/268
Installed @106
Duration @.050 218/218
Lobe separation 110
If I use this calculator: Compression Ratio Calculator | UEM Pistons
I come up with the following dynamic and static compression ratios. This was using a .058 head gasket to achieve a quench of .040.
XE274H-10. 20-224-4:
Dynamic: 7.8
Static: 9.3
CRS268H-10
Dynamic: 8.1
Static: 9.3
Am I getting ahead of myself? Do I need to clay the piston to head clearance and let that determine what head gasket I will need, then use those numbers in the calculator?
This is a 4 speed car with Passon OD gearset and 4.10 gears
Thank you! Trying to learn all this.
Ok, back to it. I got the old iron heads off the 340 and measured the piston to deck clearance and sure enough they are .018 out the hole.
I got the closed chamber Edelbrock heads here, so now onto which head gasket to run and which cam.
Since I have the engine down this far, I have the opportunity to upgrade my cam. My dad has an unused cam up for grabs, , it's as follows:
Comp Grind: XE274H-10. 20-224-4 (cam card attached)
Lift: 488/491
@.006 274/286
Valve timing @.006:
Installed @106
@.050: 230/236
110 lobe separation
OR I run the current can I have:
CRS 268H-10 Cam card also attached.
.454/.454 lift
@.006 268/268
Installed @106
Duration @.050 218/218
Lobe separation 110
If I use this calculator: Compression Ratio Calculator | UEM Pistons
I come up with the following dynamic and static compression ratios. This was using a .058 head gasket to achieve a quench of .040.
XE274H-10. 20-224-4:
Dynamic: 7.8
Static: 9.3
CRS268H-10
Dynamic: 8.1
Static: 9.3
Am I getting ahead of myself? Do I need to clay the piston to head clearance and let that determine what head gasket I will need, then use those numbers in the calculator?
This is a 4 speed car with Passon OD gearset and 4.10 gears
Thank you! Trying to learn all this.
