Line pressure after shift kit

Good read, but
Did you put their numbers thru the wringer.
When I read Scr of 10.88 and 185 psi came up, with a [email protected] cam; that instantly raised a BIG red flag.
So I went to the Wallace calculator, and sure enough, the Wallace spits out just 155psi, even by adding enough ramps to gross up that [email protected] to 292 advertised, and with an Ica of 79*/ elevation of 0 ft.
The only way the Wallace will spit out 185psi with an Ica of 79* is if I sink that thing to 5000 ft below sealevel.
To get to 185psi@ sealevel, the Ica needs to be around 64*....... just like mine, which points to a cam of just [email protected].......... So IDK what's up with that.
Now, not many people are gonna try to argue that alloy heads are gonna make more power than iron at the same pressure. In fact, many studies have proven the opposite. And so
once again, this HRM test proves nothing useful to a streeter, because
No streeter will ever build a 185 psi iron-headed street engine because we know that it will have the death rattle below 3000 rpm, at which they (HRM) conveniently didn't test.
But we also know than many many 185psi and higher alloy headed beasts are out there with long 6.123 rods even, that you can floor at idle, with a 4 speed even, that exhibit no detonation.
So, IMO, they (HRM) do a pretty good dance, with their numbers, but also IMO, it ain't all that helpful to a streeter.
And you know what I always say; the proof is in the trapspeed.

My lil 367 for instance, goes 93 in the Eighth at 3467 pounds and at 900 ft elevation. The Wallace says to do that, takes 433 hp. Here's the rub; my 367 is running a wee small cam of 230/237/[email protected] but with OOTB Eddies adjusted to about 180psi. And it did this while shifting at 7000; well actually, she came out of the starter box at 7000 and just stayed there thru 4 gears, for the whole trip, spinning continuously.
It's pretty obvious to me that my combo should NOT be making 433 hp. And so it was at the track. I even went to visit the guy in the other lane who confirmed that his numbers looked correct on that ET slip. I then went to the tower and complained that their timer must be wrong, but they replied that no one else had complained lol.
So, my trapspeed of 93 must stand. And that means the 433 has to stand.
Now, if their 250* cam power peaked at 6100, You can bet that at 7000, I was way over-speeding my 230* Cammed engine. In all likelyhood mine power-peaks at 5500, or less; I figured 5300 with an onboard " accelerometer".
Now consider that in the HR article; they have a 388 cuber with 20 more cam degrees than mine; that's 3 cam-sizes!
and their engine made 483@6100 @185*F, also with aluminum, also at a claimed 185 psi.
You can see that on a dyno, my engine would make more than 433hp at the proper rpm.

All in all it's all bogus, cuz the trapspeed cannot lie, 433 hp it is.. Maybe I'm rambling, IDK
But there is no way, on the street, that I'd run iron heads at 185psi and at 110*F
Don't call him crazy but the only guy I know of who wants to try it is @yellow rose , who is willing to try 170 psi and iron, but with 4.56 gears,lol.
From 170 to 185 is a very loooooooong way.

IMO, on the racetrack, where the engine will never be loaded below maybe 3500stall, Maybe a guy could get away with 185 psi and iron. IDK, I know nothing about racing.
But on the street, some very high percentage of the time, your engine will be spent between idle and say 3500rpm, and very very few guys will run 4.56s or 3500 stalls, am I right? So then there is no chance anyone would deliberately try to run 185psi with iron heads, especially not at 110*F.
I call BS on the bs test.
BTW-1
I have been running a rock-solid Engine cooling system temp of 205 to 207*F, since about year 2000. And yeah, she went 93 at that temp. Just imagine how much faster she wouldda gone at 110*F ,lol. that would be like, according to HRM, about 20 plus horsepower; I don't think so tim.......... Again, that's racetrack stuff.
BTW-2
My 367 is set up at 10.95Scr and pumps 180psi with a 230*cam and Ica of 64*, and a LeakDown of less than 4%
So that is Why I got alerted tom the HR article using a 250*@.050 cam. The only way to get to 185 with an Ica of 79* is to enter minus 5000 ft in the elevation box, lol.
BTW-3
the allloy heads do not suck heat out of the water ...... exactly. If they do/did, the thermostat would just compensate for that. But
IMO the alloy heads suck heat out of the combustion chambers, the same way we use aluminum in heat sinks to suck heat out of things that would otherwise run too hot. And ............ the proof is that, to make the same low-speed torque wit alloys to match iron..... you have to boost the SCR at least a half a point they say..... because at lower rpms the alloys have plenty of time to transfer combustion chamber heat to anywhere its colder than in the chamber; so hyup the cooling system, hyup the underhood air, and hyup even into the oilpan. You won't see it on the temp gauge because the stat will keep it all at the minimum cooling system temperature, continuously....
But when you floor it for a few seconds, the chamber heat cannot get away fast enough and BADABOOM! we are making power! Now do you see what I'm saying about my little 367? It really comes alive at the top of the track after being at 7000 for 7 or so seconds,lol.
BTW-3
The test I would like to see, is to see an iron-headed SBM, set up for street, running the max pressure for 91 gas and no detonation below 3000 rpm; run the Eighth with that and optimize the gears to trap right yet be streetable.
Then
Pull the iron heads and install same design Alloys but run the pressure up to the max again for 91 gas. Then record the Trapspeed change, and if it needs to be regeared, well just do it. Then compare the two. See
Now that would put the controversy to rest once and for all.
After that, I want to see the alloy headed version strangled with gearing until it traps as slow as the iron. I wanna bet you can take out 10 to 15% gearing, exactly what a streeter needs; 3.23s versus 3.91s But I'm just spitballing.....
As for me, I'm never going back to iron heads in my Barracuda. 433 is a nice fat, alloy-headed, 230*-cam sporting, power-number, lol; on about 33* ignition timing and 87E10 even, lol. Hyup, 32/34* at 3200/3400 and same all the way to 7000plus.