That cam is a little big for a 454 that will only see 5200. I would spend the extra $$ and get a forged crank and forged pistons. That way you won't have to worry when you spin it to 5500 +. Lots of used HP500 cranks around.

You may be right, but unless there is a great deal to be had, I'll be using the crank I've got.
Hell, I'd love to buy a stroker kit so it would make even more power.
Just don't have the extra $$...

For guessing, I'm with the answers already posted.

500hp / 502cid's = .996 hp per cid

.996 x 454 = 452.184
.996 x 468 = 466.13

==============

Now, add a few for slightly more compression.

Big ? is what that big 2.25" intake valve will do for you - which includes how the cyl head person cuts the seats and if any bowl work and if correct/good bowl work is done.

Also, the 4.25 bore will shroud this intake valve a good amt. It even somewhat shrouds the 2.19 valve.

So, as others have said, a decent GUESS is 450-465hp or so. Any more, will be icing on the cake.

Pat, If you are looking to buy pistons and rods anyway and your weak link is the Crank. Why not just go with one of the budget stroker kits on Ebay and have a 496?

Pat I have a nice kit to build a 575 - 600 hp blower motor out of your 454

Here is a link , http://www.offshoreonly.com/esvon/page-13153.html

I also have my un cut steel crank balanced with new balancer and flywheel , worked dimple rods glass beaded, balanced with arp bolts, 7 pistons ( #8 is no good ), . I will also give you the block ( needs to be decked). All this and The blower kit I have listed in the classifieds for $3600 delivered to your house. I have more photos if your interested.

Paul

About the same horsepower it took you a year to make.
Course you could look at Scoggin-Dickey's website and find that a 454HO makes 425 HP, and a 502 HO makes 450 HP Same idential parts except CID, so your math doesn't work.

Thats why they bore notch the block.

Speaking of which, I forgot to show the 500EFi cam specs.

Here is what I have in my notes:


Merc 500EFI
Gen VI #169621 Grind#HR-292-2S-14 IG
292,298 at .004” Lift with 1.7 rocker .598” , .610”
230, 236 at .050”
ICL 109 , ECL 119
LSA 114


Part Number: 169621 Grind Number: HR-292-2S-14 IG
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1996 Up CHEVROLET 8 HYD. ROLLER WITH CAST IRON DISTRIBUTOR DRIVE GEAR
Engine Size Configuration
454-502 C.I. V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 352 @Valve 598 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 359 @Valve 610
Rocker Arm Ratio 1.70

Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 33.0 BTDC 79.0 ABDC 292.0 °
Exhaust 84.0 BBDC 34.0 ATDC 298.0 °

Spring Requirements: Triple Dual Outer Inner
Part Number 99896
Loads Closed 150 LBS @ 1.900 or 1 29/32
Open 454 LBS @ 1.310
Recommended RPM range with matching components
Minimum RPM 3000
Maximum RPM 6500
Valve Float 6800

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 6.0 BTDC 44.0 ABDC 109 230.0 °
Exhaust 57.0 BBDC (1.0) BTDC 119 236.0 °

Remarks:
CRANE 16535-16 LONG TRAVEL HYDRAULIC ROLLER- LIFTERS MUST BE USED WITH GREATER THAN .570 LIFT CAMSHAFTS TO PREVENT ALIGNMENT BAR DISENGAGEMENT.

Believe me, I would love too.
It would seem that most of the stroker kits I have found are for Gen IV engines.
I have found stroker cranks for the single piece rear seal Gen V and Gen VI engines so I'm sure kits can be put together for less $$ than buying the parts separately.
Either way, I simply don't have the extra $$ and it's not necessary to reach my goal at this stage of the game.

Great Info and I thank you.
RM Builder was nice enough to give me the cam spec a while back.

The heads that I acquired are off a HP500 carb engine so I am assuming they already have 2.25 intake valves. Being that the engine is a 454, the larger intake valves may not matter...