Sum-6900 cam in 1990 360

RustyRatRod said
Also too, the 5.2 roller cam is considered the better of the two. A lot of people "upgrade" their 5.9 magnum with the 5.2 camshaft. I don't know the particulars, but it's better somehow.

AJ/FormS said
that's being kind

278/288/112
204/214 @.050
.421/.444 lift
Static compression ratio of 8.0:1.
Ica of 68*, 250ft elevation
Effective stroke is 2.69 inches.
Your dynamic compression ratio is 6.26:1 .
Your dynamic cranking pressure is 116.83 PSI.
V/P (Volume to Pressure Index) is 95
VP of 95 is somewhere between slanty and smogger-teen, and will make a dog out of the 87 D100 up to about 3000/3500rpm, unless you install a a big TC and gears.

That cam needs
Static compression ratio of 10.0:1.
Effective stroke is 2.69 inches.
Your dynamic compression ratio is 7.76:1 .
Your dynamic cranking pressure is 155.82 PSI.
V/P (Volume to Pressure Index) is 126
to feel like a 5.2 Magnum

And
Static compression ratio of 10.5:1.
Effective stroke is 2.69 inches.
Your dynamic compression ratio is 8.14:1 .
Your dynamic cranking pressure is 165.96 PSI.
V/P (Volume to Pressure Index) is 135
To be peppy

and that doesn't even address where the intake valve actually closes.....

Great info. I could not find any cam specs on the 1990 360 cam. Leaving the original cam in will save me some time.

I do know it would have really woken up the 318 I bought the cam for. That cam is damn near flat.