I have a 1984 f-150 351 WINDSOR HO 2WD.
I am pulling the motor out to reuild it. it is my first complete rebuild.
I want to have some power say... 400-425HP with ample torque.
i have a 650 edlebrock 4bbl that is on the truck now.. with the cash planned to go into this i will upgrade it but would be ok with it as is.. i plan to have headers 3" dual exhaust ... what i would like to know is everything else cam, pistons, rockers, intake, ignition, bore.. so you know what i want to use it for.. hunting camping towing ... oh and i got to beable to put my foot in it and leave the other guys in the smoke ... yes with a boat hooked on. cash wise.. say 300 a week for 6 months so around the 7000 mark but would like to keep it around 3-5000. it is an automatic and would like to keep it that way. thank you for your help.

 

The only way I see you are going to get near that horsepower, and be able to still tow with it, is to put a supercharger system on it.

You don't get that kind of horsepower, without moving the redline way up. This means revving the motor to get power. So that means a stall convertor for the tranny and something like 4.11 gears for the rearend. Not much fun to drive something like that.

 

ok then.... well how about some wehre in the range of 350385. stock tranny & rear end? deep dish pistons. a 750 cfm carb and a .512 .520 cam?

 

I would look at one of these kits. No guess work. Already dyno proven with the graphs and a complete list of parts to do it.

http://www.edelbrock.com/automotive_...nd_kits2.shtml

But I am warning you. Look at the graph. Even though they claim the powerband starts at 1500rpm, the graph doesn't start till 2500 rpm.

 

I went to www.jegs.com. and that 400hp package is about $1734.00.

http://www.jegs.com/webapp/wcs/store...0002_595675_-1

 

I agree 110%. SUPERCHARGER is the ONLY way that you will accomplish what you want to do. I have NEVER been shown a dyno chart of a true 400+ hp 351w (stock 2v heads) in street trim (air cleaner , exhaust, mufflers) and with a max of 5000 rpm (heavy truck - hard to tow with a peaky 6000+ engine)

And yes, I have asked repeatedly for dyno charts, of which I have been informed there are "thousands" out there. Looking at the dyno chart, I see a max of 6500 rpm shown on the 367hp engine. Now that is not a usable street rpm range for most of us, on a daily driver, to say the least in a heavy truck, and what about below 2500 rpm? Seems more than hokey to me. it would however, be fun in a light Mustang

Yes, you can get 4000+ hp out of a 426 based Hemi also - but look at the short life and the totally unusable (for the street) rpm range. (when was the last time you saw a top fuel dragster on the freeway towing a boat? But it has 4000+ hp .......

More reasonable is the 335 - 355 range as you have figured out. A good single four barrel 600 to 700 cfm, head work/clean up, reasonable compression of say 9.5 to 1 and medium duration, high lift cam, premium fuel required, a low restriction air cleaner w/cold air induction for the summer, switchable for hot air in the winter (unless you live down south) and headers with a balance tube should give you about All that you are going to get. A rear end ratio of about 3.55 with the AOD will maximize fuel economy, plus give you the ability to tow in direct. Unless of course you have large tires.

I see that you have a automatic - it will need to be reprogramed / mechanicaly modified if you want the up the operating range to 6000+ rpm, unless you manually hold it in the lower gears.
David

 

why not go to big block,my 460 has gobs of bottom end.can't beat cubic inches.

 

i think ill go with a comp cam .272...... that wasy ill have all around pwer and yet still have some gas left sound good?

 

Sure does as long as your happy with it!!..

 

Go with a 408-417 stroker kit and a modern hydraulic roller cam. Or do what I did, 460!

 

Bang for your buck a 393 stroker is the way to go to get big torque and HP numbers at a reasonable RPM range. There's no reason a 393 couldn't make 390hp and 430 ft*lbs (with aftermarket heads) and not be 100% streetable and towable.

Heck, 300hp and 400ft*lbs will do ALOT more than you'd ever expect and that's a pretty mild build on a 393. Plus it'll be all in by about 45-4800 RPM for hp and 25-2800 for tq.

Justin

 

Yea, but 300hp doesn't hold much weight during bench racing.