See people doing estimated Horse power off eng. build. Is there a formula to use. Just wondering cause people keep asking me what my charger is HP wise and I just look at the like a dummy.
440 30 over.
11-1 trw pistons
ported 452 heads 2.14 /1.61 valves
torker intake, 750 bg carb,.electroinc ing, headers
I'm guessing low 400's

It is not hard to make over 400 HP with most of the parts you listed, the camshaft, headers and carb size can have a large affect on the HP and torque made by the motor.
The first motor I built for a customer that wanted it dyno tested and tuned made right at 500 HP, it was a 9.5 to 1 compression ratio pump gas 1962 Max Wedge motor that made 499.3 HP at 5900 RPM. It was bored to 4.250 and had a decent solid lifter camshaft with the stock dual AFB on the stock crossram intake.
The next one I dyno tested and tune for myself made 430 HP at 5500 RPM, it was a .030 440 block with TRW six pack pistons and a stock 1970 cast iron six pack intake with a set of stock vacuum six pack carbs and a mild hydraulic lifter Comp Cams camshaft.
The last pump gas stroker pump gas motor I made for myself made 612 HP at 5500 RPM and 544 Ft. Lbs. at 4500, it was a 400 block bored to 4.375 with a 4.25 stroke crank, ported big valve 906 heads and a Com Cams custom ground solid roller lifter cam and a low deck Eddy six pack intake with a set of slightly modified 1970 six pack carbs, that motor exceeded my expectations and was a real hoot to drive
What brand and type cam are you running and what size headers and exhaust system?

Need to know the lift & duration of your cam.

kinda embarrassed to say but only thing i know about the build is the specs I was given when I bought it.

440+.30
11.0:1
509 mopar perf cam
hardened rocker arms and shafts ? Is that a thing lol
hooker headers
crane hl6 cd ignition
heads and intake supposed to be ported and polished but I have no ideal if it was professional job or hack job lol.
posting the pick of the paper the guy had with it.
Thanks for the info.

The parts that you show should make north of 400 HP with no problem on a engine dyno, as long as the cam is installed correctly and the jetting and timing are close

Pretty close to the old 500hp recipe in the tech archives, if everything is where it should be.

You should easily be close to 500 HP if the heads were done right.

cool deal, thank you all so much for the info. Now I wont look like a deer in the headlights when people ask lol.

I can't say what power you make. No one can. It is not the sum of the parts. It could be 300 HP, it could be 500 HP.

I'm always curious as to why folks want to talk about their motor parts and horse power numbers but don't actually care how the car runs.

If you really care, take your car to the track. Looks like MIR is in your neighborhood. Get the race weight, weather conditions and track results. Then we'll let you know what your power level really is, undisputed. Don't you want to know what the car runs? Plus, you'll have a blast.

would love to run it, just for the fun of it. And I will when I finish with the suggestion's that andyf made as far as torsion bars shocks and such. I do care how the car run's and it pulls real hard and runs awesome. Just wanted to know if the build was decent, and the sum of parts were compatible for mild street car. The estimated horse power was just out of curiosity. Was thinking heads might be a major choking point but think I will leave it alone because of the way it runs unless somebody here told me they where a real hindrance. From the sounds of what people are saying for me personally not worth the expense for the way I use the car. Thanks for your help though.

The huge unknown are all the details, as they matter immensely. And the heads is a really big one. The actual compression ratio is a big one too. The extremes of those two alone can easly be worth 100 hp.

A true 11:1 compression motor with a decent cylinder head (260 cfm at 0.500" lift) should get you to 475 hp, maybe more, IMO. In a full exhaust, 4000 lb race weight B body that should deliver a 112 to 114 mph trap speed at MIR on October. In what I call true street tire, street gear, street trim car, that will be a solid low 12 second car. A typical bracket car suspension, you be approaching mid 11 seconds.

Let us know how it goes

“About 450hp” would be a perfectly reasonable answer at the A&W, Sonic, car show, or cruise night.

Default 500hp from Tech Archive
Similar build?

500hp from a 440 isn’t hard at all...... you just need to have “enough” to get the job done.

Enough....... compression, flow, cam, intake manifold, headers, and carb.
None of those items by themselves need to be anything stellar(as in the default combo from the archives), but if any of those items aren’t quite “enough”, then it’s obviously harder to reach that 500hp mark.

In the mid 1990s a magazine built a 440 to stock 375 specs and on the dyno came in just shy of 375hp. But then they added typical weekend bolt ons consisting of 509 Mopar cam, headers, single plane intake (Torker?) and different carburetor and dynoed 425hp. But we know that even if the HP number is not BBC impressive on paper an engine like this will punch well above its weight and can run well into the 12s.

My past 440 had compression, flow, intake and carb, and it fell short by a lot.

You’ve been around this stuff forever....... so, where do you feel your combo needed to be improved to get into that 500hp range?

I can assure you there were no magic parts in the “default 500hp” combo.

Regardless what the output actually is your engine in a properly set up say B body would run about 2 seconds faster in the 1/4 than a stock example. I bet low 12s or better.

I wasnt suggesting that magic parts were needed, but that all the right parts are needed

I guess I left a bit to the imigination with my statement. 6 pac intake, true 10.5:1 compression ratio, The heads were my old 915 that you have seen. I think they were 255 - 260 cfm flowing heads, but the cam was the MP 272° - 0.455" lift. So the cam was smaller. And of course exhaust manifolds. This was before my TTI, so compression bent pipes and 2 1/4" super turbo mufflers.

No dyno data. Car ran almost 109 at probably 4250 lbs in very good air. Assuming the good air was close to standard conditions, that's probably a corrected net 420 hp at best, according to Moroso. Probably a 440 hp on the dyno. I do think a better cam and headers it gets close to 475.

A ha!!!
“Not enough”....... cam or exhaust in your old combo to sneak up near the 500hp mark.

I think many people underestimate the importance of the “big cam” when reaching for 500hp out of those milder combos.

Of course, depending on how the car is being used...... using a 500hp capable cam may or may not be a good choice.
In your old combo, the car would have just slowed down with a cam like that.

Running the 500hp cam successfully means....... running “enough” gear and converter to go along with it.