Could someone give me how much horsepower that they 'think' my engine will have with all these mods listed. I know that I will never actually know until it is dynoed but, just speculate for me please.

460 with ported heads (not extreme port job, but decent)

edelbrock performer rpm intake manifold

LandL headers

Edelbrock performer 750cfm carb

Dual Flowmaster 30's series muffler/exhaust

Compcams magnum .530 lift .230/.230 duration at .05 280/280
total duration 110 degree lobe separation

edelbrock roller rockers with 1.73 ratio

edelbrock performer link timing chain.

New valve springs.

valve job

That is it I think, I may be missing something. Come on give me your best guesses. Thanks.

 

Awwwww... If you are going to move it at least move it to the 385 series forum, that has more traffic and more people with knowledge of this specific engine.

 

Anyone?

 

You haven't listed enough information to input on DD2000. What is your compression ratio? Valve sizes? What is the cam part number?
I can also tell you right now that the cam your thinking of getting is fairly "wild" for street use. Your going to need a higher stall converter if its an automatic and probably 4:10 gearing no matter what tranny you have to take full advantage of that much duration ... Deen

 

Yeah I forgot, I ordered a 2400 rpm stall torque converter. I really do not know what the compression ratio is. I am assuming that it has the stock valve size, I know the intakes are a little over 2 inches, don't know about the exhaust, maybe 1.6. How exactly do I go about regearing?

 

I'd also go 8-12 degrees more on the exhaust side of that cam than the intake.

 

with stock 8:1 compression on most 460's you'll probobly make 315 hp 350 ft lbs of torque. Up the compression to 10:1 and I'd guess 400hp and 425 ft lbs torque.

 

What would be the cheapest way to up the compression? By the way, how many cc's are the heads?

 

I've ran a combo with that same cam in a 1974 F-100 that weighed 4270 lbs and it would haul!! All I had was headers, the cam and a 750 Holley. I even had the stock smog chain and 8:1 CR. It ran on 87 octane and never rattled the valves. The power come on strong at 2500 rpm and ran up to around 6000. I had 3.70 gears and a stock converter. You will be very happy with it I think even if you don't put the gears or converter in it now. It would definitely help, but it will run fine. I don't have any clues on HP, though. It would be close to 400, I guess. Dave

 

I ran DD with your combo using a 25% increase in exhaust port flow over stock and came up with:

468hp@6000rpm (flywheel) 351rwhp with 25% driveline loss.
475tq @4500rpm

Max torque at 4500rpm takes you way out of street cam status in a truck, even with a 2400rpm converter. Way too much cam.

You're at risk with stock rods at 6000rpm (CJ/SCJ used DOOE rods at 5800rpm). I wouldn't run those rpms with stock rods as you're looking at 62-6300 without a limiter.

You didn't mention push rod guide plates or push rods. CJ's bent 5/16" pushrods at those rpms with guide plates.

All in, I would consider backing off on the cam until you're at 5500 max rpm. And you'll still need guide plates and hardened push rods.

 

Are you serious? Crap, In your PM you told me that cam should be fine, so I ordered it, damnit. I suppose I can return it, but I don't know. I tried DD at school and got 390 hp at 5000 rpm and 487 ftlbs at 3500 rpm. I wonder what we did differently? Could you send me the *.dyn file at erikl85@inreach.com please?

 

I'm running 226* @.50" and around .516 lift with a similar engine setup (I have 9.5:1 compression - not sure what you have) and my truck runs great. See my gallery for more detailed description.

Did I miss something in the description of your engine? Why would George say you have too much cam?

I'm even thinking about going to a higher duration cam like yours.

 

Thanks, I bought some 9.5:1 pistons and I am getting some hardened pushrods and guideplates I just do not know what size. I think that I will just stick with this one and see how it works out.

 

Eric, if you say so, but I can't imagine ever recommending a square duration cam for a BBF. Must have been under the influence.