Agreed, in my engine builds using a 210-220 @ 0.050" hits the my magical 200 PSI max (per Vizard) for the street max cylinder pressure in the mid 9.5:1 or so. I personally would likely kick that duration up to 230-240 @ 0.050" with that much compression. The aluminum heads will help with detonation as well. With that high compression you will find you will still maintain most of the low RPM torque you would have had with the short duration cam in the 9s for compression.
I only have a 367, but it has run 192psi in a previous iteration, with a Hughes 223/230/110 cam, and alloy heads.
I concur that the bottom end was ferocious.
I worried about the following winter, during it's annual freshening, I found the thin 028 Headgasket was migrating into the valley. I had just caught it.
So, I switched to the 039FellPros and re-decked the block from zero to plus .007, to maintain the quench, where it remains to this day. With the slightly larger chambers and the later Ica, the Scr was slightly reduced and the pressure dropped to 185ish.
I would still be running that combo, if the cam had not eventually dropped lobes, right after an oilchange, four years after it's birth.
It was and is to this day, my favorite iteration I ever built; it had everything I could have wanted in a streeter.
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The next cam, another Hughes; 230/237/110, was a bit of a disappointment., I retimed that cam, but it was no use.
This was compounded a lil later, after I installed a GVod which required the H to be cut out of my dual 3" exhaust. Between the two changes, the bottom-end went away big time.
I should clarify; the bottom end I was used to, went away.
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The good news is that this prompted me to find a 3.09low Commando trans, and just like that, the bottom end was back ........ with a lil to spare.
So I said, Oh, what the heck, and retarded that cam.
And just like that, the top-end was back. It ain't quite like the 292/292/108 cam I started out with, but on the whole of it, it's good enough that it's still in there, all these 20 years later.
In conclusion, I don't care what anyone says, if you have never run in the 190s or better pressure, with an SBM, a manual trans and 4.30s; man, outside of a BB, you haven't had a decent rush.
And Better yet is; 3.55s, the Commando, and a GVod being used as a splitter.
My Barracuda, the one time I tracked it, sprinted to a 93mph on street tires with the 3.55s. I never expected that! To me it was just a nice DD. I made four runs that day, with only one completed. I parked the car, ate the track food, and watched my friends try, without success, to better my trapspeed, with their DDs.
Pressure is heat is torque is power.
My Opinion;
Looking back to my youth, a lack of pressure had always been a total disappointment, and on the street, it never got all that much better with the addition of band-aids, like stalls and gears.
Alloy heads taught me about pressure, and I'm hooked.
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There used to be a fella here on FABO, that was working on an Iron-headed combo, to showcase 170psi. If anyone could pull it off, he had the smarts for it.
However, I ran in the 190s on 87E10, and still do; I wonder if that is possible at 170 with iron.
I miss that guy. I never told him that I learned a lot from him. If you see him, tell him thanks.
