Estimated HP?

I just bought a 408 stroker motor and was wondering if any one might have an estimate on how much horse power it might be making?
What might be a good carb for this motor; I have an old 850 holley that came off of a 383 but isn't a double pumper.
What kind of limitations does cast piston and crank have?
Whats a good spark plug to run in this?

360 bored .030 over
4" Eagle cast crank
Cat H-beam rods
KB pistons 9.6 compression ratio
Edelebrock Performer Heads
Edelbrock Cam Flat tappet Hydraulic
Lift at valve
 Intake .488
 Exhaust .510
Duration at .050 lift
 Intake 234 degrees
 Exhaust 244 degrees
Edelbrock performer plus timing chain
Mopar single plain intake
Crane gold anodized aluminum roller rockers 1.5 ratio
Also has windage tray  

The same plug you would run in a high comp. 340 or pre 1970.
HP? around 450.
Why not more? Not enough cam.
I would go with a solid with at least .550 lift 284/242@ .050 duration.
I am not a fan of the vac. carbs especially in a performance application such as yours.
A 750 HP double pumper is more likely to out run and give better throttle response than your 850.
Doc  

with a 1.75" header around 450 flywheel. try the carb u have , what is the rear gear? a naturally aspirated mopar do not worry about a cast crank or pistons. with aluminum heads and only 9.6 a 10.5 1970 n9y plug may be a little cool. a hotter plug is a n10y or n11y champion. use a thin (.025") moparperf. p4120094 orange head gasket for more comp. ratio than the average .045" gasket.  

Hey thanks for the information I'm planning on putting the motor in my Demon the rear end ratio is 4.30 and I am planning on running a 28" tall tire hopefully. What would be a good RPM to shift the motor at, down the 1/4 mile.

Thanks  

whatever rpm makes the quickest time. start at around shifting at 5500 rpm, then 5700 rpm then 5900 rpm then 6100 , etc. rule of thumb is shift at a slightly higher than peak HP rpm. she sounds like mid to low 12's.  

The cam is a little small. I would go for a double pumper right off the start, but that is just me. The cast crank will take alot of power before it breaks. I agree a 750 would probably work quite well on this set up the way it is.

Personally I would shave the heads some, and get that compression up! If not, you are going to net your best hp numbers with regular 87 octane from what I have seen on our dyno.

If you went up with compression and cam, I would go to a 850 or 950 carb. I have seen many combos that had not enough carb, hardly ever see an engine that has too much!


My 434ci small block made the best power numbers and curve with a 1050 dominator, most would say that is too much carb, but I have the results that prove it! Dyno numbers and track numbers.  
434ci. "318" N/A Small Block. Street Driven Pump Gas Racin'

Go with at least 250* @.050 on the cam duration for that 408, but not too much, gotta keep some cylinder pressure!


Ask me how I know.  
age is no lock on brillance

use the cam u have. use the carb u have etc. make changes later.  

.250 duration with 9.6 comp? If you do this your motor will be lazy below 4500 rpm.
Doc  

I have a 68 340 block that I want to make into a 416 stroker with forged crank,  h-beam rods, (11:1 cr.)pistons and put a solid roller cam in and use the Edelbrock heads and Mopar M-1 intake off of this engine and have them fully ported and pollished. I plan to just use this 408 stroker motor to get the car up and running hopefully while I collect and save up for the 416 motor. This 408 motor has a center sump oil pan on it does any one know if this will work in my car or do I have to get a rear sump pan?

Thanks for all the info and opinions that every one has sent. Any more info or opinions are certianly welcomed.  

cars are center sump. mopar trucks and vans are rear.  

The oil pan is a stock style sump not a deep one. My question is will the high volume oil pump on my motor suck the pan dry during a 1/4 mile pass if I run the oil level at the add mark instead of the full mark?

Thanks  

just might suck the pan dry, baffle it and use a stock replace melling pump.
Your wasting hp with the hv pump. I run stock on all of mine turning 7200 in a 340 and 65-6800 in the 410.

btw 250*@.050 duration is not big for a 408, I know cause I actually have a 410 =.040 version and run 252*@.050 and it'll rip you're head off from idle or any rpm for that matter.  
age is no lock on brillance

This should be a more accurate "guess". Loaded up on the desktop Dyno, i come up with the following:





If you can get me some airflow specifics, as well as missing camshaft data....lobe centerline (I guessed) and installed intake centerline, I'm sure I can come much closer. I used 850 CFM and "large tube headers with mufflers" for exhaust.  
____________________

It is enough that Jesus died and that he died for me.

do not run a hi volume pump with a stock pan. I run a hi volume hi pressure pump at 340 hi rpm and a 7 quart 10-30 oil system with a 10" deep Moroso pan and pickup. with a windage tray.