69 Cyclone 428 in Carcraft makes big hp with exhaust manifolds

[rcodecj]

The article states 508hp at 5900 and 514 tq at 3900

Built by MAS Performance in Ellsworth Minnesota
Engine specs:
428 bored .010
10.0:1 compression
Edelbrock Performer RPM heads
Comp cam measuring 218/224 dur and .513/.520 lift 
Holley 750 carb
factory 428cj exhaust manifolds 

Quite impressive since the most I can get EA3.2 to tell me is:
461 hp at 5500 rpm's
481 tq at 4000 rpm's

I have found EA3.2 to usually be quite generous with the hp, this engine beats EA3.2 by 47 hp!
But of course no dragstrip times, par for the course with car magazines.

Impressive, quite impressive indeed.
Thoughts?

[cjetmech]

They must have forgot to mention the 150 shot of juice. 

[jayb]

   I'd call BS on that one...

Edit - In fact, I'd call the results published in the magazine one of the more flagrantly optimistic dyno results I've ever seen.  The editors at Car Craft should have been able to see that one for what it is.

[Kerry j]

If it really made that kind of power, sure makes my 416 numbers look anemic. 

[Qikbbstang]

I was thinking it would a FAST racer and the ET/MPH would lend credence to what would be a 428 on the outside but being stuffed to the valve covers with stroke and plenty of tricks.......NOT

[RP]

That engine is pretty much covered in Jay's book, more or less.
400 hp+-, maybe closer to 375.

[TorinoBP88]

I used that same cam in a 416 engine with truck headers (about the best out there according to Jays book) and with a 'S' intake it was maybe 330 HP and with an RPM intake it might have made 375 hp.  Good torque, it would smoke the truck tires all they way to 55 MPH on the FWY if i wanted, but it was no way over 400 HP!

So at about 12 HP and 15 ft torque to get to a 428...  Hog wash is what those numbers are.

[Barry_R]

Don't know if the owner is being lied to - or lies all by himself.  But those numbers go into the same basket as the mythical 450HP bolt together 390 from Hot Rod many years ago.  Stuff like this make my task a lot tougher since I can't make real power to match the published fraud numbers.

[rcodecj]

So I think by now we have a consensus. I am glad to see we have an honest bunch that sees it how I saw it. That's the reason I brought it up the way I did, I did not want to sway opinions. It seems no one here thinks it's possible. Even when given "magical heads" EA3 won't give it that much hp, and I'm a firm believer in heads being a major player in hp production.

[Garyford]

Need a dual scale dyno: on set of real numbers and another set of magazine numbers.