Just got my new 500 cid low deck stroker engine of the dyno making 593HP and 610 ft-lbs of torque. I was expecting a bit more? Did I have an unrealistic goal hoping for 650HP based on the following compnents of all new parts?

71 block 0,40 over
440 Source stroker kit (4.150" stroke/6.760" rod)
CNC ported eddy heads, milled to 10,75:1 in Compression (Hughes Racing)
CNC ported eddy victor singel plane intake (Hughes Racing)
Holley 850 ultra carb.
1,6:1 roller rockers (Hughes Racing)
Huges Hydrualic Roller Camshaft (Hughes Racing)
Intake Valve Lift 1.6 .576"
Exhaust Valve Lift 1.6 .576"
Intake Duration at .050" 252°
Exhaust Duration at .050" 258°

Any thoughts on the set up and dyno results is much apriciated.

Not much camshaft for that big of motor. I suspect that is effecting the horsepower, both from a lift and duration standpoint. Don't know much a about hydraulic rollers.

I agree, those numbers aren't bad for that combo, more cam and more compression and 4.25" stroke vs 4.15" stroke would have helped too.

I agree small cam for a big block.

definitely see a lack of lift especially with a CNC head that should happily flow to .600+ lift
how much more that will gain you is only a guess but some for sure

Tex

More cam may cost you mid range torque, and depending on what your use is, might not be as good a combo. I like what you have.

That's Very good for what it is. Mild comp and cam. If its for mostly street it will be a Great ride. If were to be street/strip I would of went with a cam around 262/265 intake @.050

600 hp and 620# torque is going to be a street monster. You probably wont be able to even use that much.

Thats 1.186 hp per cube.. thats not much.. as a rule
strokers EAT duration and the lift is lacking.. and
a 850 is a bit small on a big CI engine of that nature..
at what RPM do it make the peaks
EDIT
whats the use of this engine... and I assume
this was on pump gas

You have a great combination, just a pretty mild camshaft. And for your power goals I would not have went with a hydraulic roller.
But since you already have, maybe call Bryan at IMM. He has some pretty aggressive hydraulic roller profiles that make good power.

Id agree with the others, about what I would expect also, cam, compression, I think it did pretty well, will make a heck of a street motor. More squeeze, bigger cam, Indy or Victor heads would have put you over your expectations.

Miniature cam and carb, with low static.

I'd say about 600hp and 600tq is a pretty good.

Thats not real far from my combo. I use a 440Source 4.15 crank and .030 over 440 block for 493 cubes and around 600 hp. I have 10.6 comp with quench so it runs fine on 92 pump. I have the basic EZ heads and a solid flat tappet cam at .585 & .592 lift with 264 & 270 @ .050 and with 1.6 Hughes rockers its about .630 lift. Also I use the Indy dual plane intake and a Holley 850 DP. Never dynoed but has pushed my 3700 lb 63 to 10.70's @ almost 125 so far through the full exh and on 92 pump. And I do drive it the 45 mile one way ride to the track. Ron

Those are good numbers for a pump gas street engine. If you thought you were building a race engine then you went way too small on the cam and the compression.

The 512 low deck in my '65 Coronet makes similar numbers. I use a hyd roller cam with 250 at 0.050 cam and 10:1 compression. I also have CNC ported Edelbrock heads and a Performer RPM intake with a 750 carb.

Hi Guys. Thanks a lot for grate feedback, this is the first stroker motor that i have build so I was just to find out if the parts that i have put together and the dyno results was way off. Sounds like i have done most right in my bulid with the tought to that this is a street motor on 95 pump gas. the motor goes back in my 70 cuda with a manual transmission this weekend.

Not bad at all for that combo, should be fun!

A 630 solid roller and 1000cfm 4150 carb would make a difference if you ever want to go that route.

I'm getting ready to fire up my new 500" Duster build, it has MW cnc Eddy's and an Indy single plane intake. I'm WAY undercammed with the solid 557 purpleshaft but I don't care cuz I built this car to cruise, and it won't even have enough tire or suspension to hold this much motor anyways.

That's pretty close to my old Stage V 508 RB motor I built several years back, About 610hp/620 lb/ft would be about right for a std port (non MW)motor but with a very broad flat torque curve, I suspect the long runner Victor intake might not be the best fit and might be hurting the curve a little (but not much), I ran an extremely well-ported Street dominator on mine. I like a 1000HP Pro-systems carb on that combo, I think I have my old build sheet if it helps. The 850 will be a little small IMO.

I think your cam is about right for what you're doing, that same duration was awesome on the street in mine. A HR cam is going to limit your lift to ~.600 anyway, can't go much higher unless you switch to a solid and probably not worth it cause all the noticeable power gain will occur above the peak torque RPM....you'll never notice it 85% of the time.

you didn't mention your header size but you'll definitely need a 1 7/8" or 2" primary with a 3 1/2" collector, a 3" collector will lower your HP trajectory substantially vs a 3 1/2"

My old 508 motor is still kicking butt on the street, PM Paul PHJ426 he can tell you all about it.

Dyno tests results are dependent on many things like the lobe center on the cam, the actual weather conditions outside the dyno cell, the amount of tuning done on the dyno. I've seen motors pick up 50 HP and similar torque on the dyno from tuning the carb, igntion and cam timing
I don't finish the final tune up now until the motor is in the car BTW, less power in a stick car can be your friend, less tire spin