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Stroker power estimate help

  
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Stroker power estimate help

 
TNT1 TNT1
New User | Posts: 4 | Joined: 10/12
Posted: 10/28/12
05:15 AM

Can you give me a rough estimate on what kind of power this combo makes?

- chevy small block 388 stroker with eagle forged steel crank and rods 4 bolt main block world product sportsman II heads stiffer valve springs, comp cams roller cam 550 lift 230 duration@ 50, roller lifters and harlend sharp roller 1.6 rockers, performer RPM airgap intake, holley 750 HP carb, block hugger headers.
- dual 2 1/2" flow master exhaust

That's all the specs i have on it.I was also told this ran a 13.9 quarter in a 4x4 truck weighing roughly 3400 pounds.Does this sound right?Any help and opinions appreciated.  

68scott385 68scott385
Guru | Posts: 1990 | Joined: 10/09
Posted: 10/28/12
10:05 AM

Is that 550 lift with the 1.6 rockers or is that the advertised lift with 1.5 rocker arms?

How much air do the heads flow?

What is the compression ratio?

What is the header primary tube size?  
68scott385 68scott385 68scott385

pepsi1 pepsi1
Guru | Posts: 1718 | Joined: 09/11
Posted: 10/28/12
01:48 PM

TNT1 welcome to CHP:

  Too,too many details left out. It's hard to say. What are stiffer valve springs, so stiff the lifter collapes on the Cam...LOL... All kidding a side. If you want an honest answer you need to supply a lot more information then that...Okay...Just having fun with a Newbee...Thats all don't take it to heart...But we really need more info.Thanks

Bob  

TNT1 TNT1
New User | Posts: 4 | Joined: 10/12
Posted: 10/28/12
04:05 PM

I'm guessing it's advertised lift.200cc heads some say are good for well over 400hp.I don't know the compression but it's for pump gas.No clue on header primary size.  

redneckjoe69 redneckjoe69
Addict | Posts: 2337 | Joined: 03/10
Posted: 10/28/12
04:13 PM

ill blindly guess you have the potential of making 400+ h.p. & ft. lbs. of torque,...with the proper tune.      you could always hit a dyno if your real curious.     its just really hard for these guys to make a prediction without alot of specifics.     welcome to CHP.  

68scott385 68scott385
Guru | Posts: 1990 | Joined: 10/09
Posted: 10/28/12
04:31 PM

I'm gonna go out on a limb, due to similarities, and say 425-450hp and possibly more depending on specifics.  
68scott385 68scott385 68scott385

skyeking skyeking
Addict | Posts: 2738 | Joined: 08/09
Posted: 10/29/12
03:59 PM

Hi there,
 try this guess....431@6500rpm...Torque should be all in by 4200rpm..[400+]  
skyeking

TNT1 TNT1
New User | Posts: 4 | Joined: 10/12
Posted: 10/29/12
06:30 PM

Thanks for the help guys, i'm happy now.  

Dave632 Dave632
Addict | Posts: 2218 | Joined: 07/08
Posted: 10/29/12
07:26 PM

A 4x4 full size truck that weighs 3400 lbs. is hard to believe unless it is totally gutted and then some.
My big pickups, 2500 & 3500 were not 4x4 and they weighed close to 6000 lbs.
400 hp is not out of the question but there are so many variables.
The best way to tell hp is by track MPH.
Take you Mile Per Hour and you car weight. There are formulas available to give you a good idea of the power made. Remember that is rear wheel HP and you have to add roughly 20-25% more for drive train loss.
Here is an example using that 3400 lb weight. If the Truck ran 94 mph in the 1/4 with that weight it is making 220 hp at the rear wheels. Adding approx 50hp for loss and you get 270hp.  
[[SUPPORT AMERICAN CARS, STOMP A RICE CAR TODAY.]]

68scott385 68scott385
Guru | Posts: 1990 | Joined: 10/09
Posted: 10/29/12
08:12 PM

+1 Dave

It's hard to take weight out of a truck because there's not much left after the interior is gutted. I know that fiberglass cabs, beds, etc, are available but they can be pricey.  
68scott385 68scott385 68scott385

TNT1 TNT1
New User | Posts: 4 | Joined: 10/12
Posted: 11/01/12
06:42 AM

Hey, I never said it was a Chevy truck - it was a 1980 Toyota Hilux with big 38.5x11.5x15 off road tires.