Nothing wrong with compression , just back the timing a couple of degrees. More low end power with slightly less peak power. Just look at it as a boosted engine raises dynamic compression so appropriately pull timing you can run pump gas
Dang, tough break on the wiped cam. With that compression, I like a wider lobe separation unless it's a race-only application, and not so staggered intake-to-exhaust, duration wise. A "Thumper" and "Whiplash" (Hughes) cam designed for "sound" are great in low compression engines (building cylinder pressure), but with your pistons, you could use a straight-pattern cam like the old .484" or if enough gear with that 4spd, a .508" Purple Shaft, would work better. I like the slightly (7* split) staggered "Purple Plus" series from Comp Cams even better than the originals, they make a .474,.484, and .508" all with modern lobes specific to MoPar (.904" lifter diameter minimum). A Howards "Rattler" is a 109LSA and they have 3 different levels. I'm just not a fan of Thumprs, unless you have a low compression engine and want to turn heads more than take it to the track. Thanks for posting, and good luck!! RB
According to my DesktopDyno, your 72cc heads with a .054" head gasket (4.040" dia.) and pistons down the bore .010", this engine will have a 9.63:1 compression ratio, with a stock bore with flat top pistons...
You know, you can put those pistons on a mill and take that dome off and not hurt a thing. Will make them a lighter also, maybe put them on a scale and match them and go. See it done many times. I've seen dome pistons in a Big Block milled some and swapped sides and the dome then went up into the open chamber on a 906 head and created a squish area. Not ideal but works on the street.
According to my DesktopDyno, your 360 will make about 376hp@6000 before it drops and 375ft.lbs.@4500 with an 800cfm 4bbl. I think these numbers are shallow. I've got other cams here doing better on this thing. That is installed at a 101.5 Intake Centerline where the intake closes at 39* ABDC to get it streetable.
It should be reasonable. It should turn over will a little bit of effort. Generally after installing each piston, I’ll turn it over to make sure there is no binding, and if there is, I know which one caused the problem.
