I own a '87 F-150 w/ a 5.0. I need close to or above the 350hp range. What applications are recommended for this process. (Besides swaping motors) Thanx

 

all I have to say is, 460.

 

How long does it have to last?

 

well the first thing i would do is junk the truck 302 and find me a H.O to put in its place better pistons and a roller block i am sure that will help and for the other 150 H.P try NOS....cheap an easy

 

with origional block, first thing you are going to have to look at is boring .030 over and stroking the block to 347ci. (there is no replacement for cubic inchs.) Second and third is getting better fuel and air flow, perhaps twisted wedge heads with a crane powermax cam, with 19-24lb fuel injectors. That should get you pretty close. you will probly need to change you torque converter as well. (hate to lose power in the drive train).

My personal opinion agrees with mjl (except for the NOS for which to do properly you would be cheaper with a Supercharger) if you got it to spend, go with a 5.0 HO EFI these are the best 302's to build horsepower out of.

 

Pull the radiator cap, and pull a Mercedes AMG 65 under it.
6.0L twin turbo V-12, 615HP......

 

don't stroke and bore a 302 when ford has already done that get a 351, bore and stroke it.

 

I would say world products roush 200 heads, a comp roller cam, and a Kennebell.

 

how much would a 302 stroker kit cost, and would the motor hold up to NOS or a supercharger

 

i know you can twist some pretty mean rpm's with a 302, you know, where all the horse power comes from on a 302, is this still possible w/ a stroker kit in it. And i know horse power is bitchin' but you can have all the horse power in the world, but you aint movin without the torque, how does a 302 stroker rate for torque? Along with 350 horses or there abouts, i would also like to have about 400 ft. lbs. of torque, once again, is this still possible with a stroker kit and some other goodies? Thanks for all your help. With all of your replies, I could be very well on my way to building an awsome machine

 

the 347 stroker will have about the same horse and torque as a 351 possibly a little more with higher compression (as that is basically what you are turning it into). a decent kit is around $1500 far as NOS or a supercharger, I dont recommend NOS to anyone It burns hotter and will wear out the engine quicker also when the bottles empty bye bye power. With a supercharger you will get the extra power as long as it functions and your engine will last longer from being run cooler from the air being forced into the block. Also as I said before, pay attention to the drivetrain this is where the power gets delivered it doesnt matter how mean a engine you got if you lose the power here. If you are building for speed you only need enough torque to pull your vehicle out of the hole say up to 2,000-3,000 rpm after that you want horsepower.

 

I disagree with the tone of this thread somewhat. After driving, beating, thrashing, and trashing my share of 302's, I can tell you with some degree of certainty that 302's will push a truck and pull a light load, but when it comes to pulling any weight at all or shredding tires and hauling *** in a pickup, a 302 is the last thing you want. For that, they are much better suited to a light car like a Rustang.

Can you get 350 HP out of a 302 for relatively cheap? Oh yeah. Fat lot of good that will do you in a big, heavy truck. It's simple physics. You'll have to spin it to the moon to get into the powerband and the only way to do that in a truck is to regear it. Then of course, you can get it moving pretty quick, but you'll run out of gear too quick, too. And there isn't anything special about an HO motor versus yours, either. They've got roller cams and that's about it. What's that good for? Horsepressure on the top end. Once again, wrong answer.

To do anything useful like haul stuff or haul *** with a truck, you need torque. Period. Your problem here is that 302's don't really have any. The stroke is too short. Real tough to get around without stroking it or a power adder. I don't know why the other poster thinks that there's a difference, but BOTH blowers and giggle gas will raise combustion chamber temperature - blowers even moreso than the gas. That's a fact. Both are expensive to set up with an EFI system and either will nuke your pistons if you've got the setup even a little bit wrong. Strokers are cool, but 347's are not. They burn oil and they aren't very durable. The whole concept pushes just a little too far past the limitations of the 302's block dimensions. NEVER build a 347 to put in a vehicle that a 351W will fit into. 347's are for those Rustang drivers that can't get a 351 under there hood without a torch. It makes ZERO sense to dump that kind of money and time into an engine that is barely capable of what a 351 is and won't last half as long.

So what do you need to do? What you really need to do is swap in a 351W. If you really want to keep the wheezer, recam and supercharge it. Use a Comp Cams 31-255-5 and save your lunch money for a Kenne Bell whipplecharger. That's the only way you'll ever build any useful HP AND torque in a truck 302. Avoid all the centrifugal blowers. They don't start to move any air until you're too high in the powerband.

 

I had a friend install edl intake and 2 edl carb 600cfm, and machine 'd aluminum heads, board and stroked along with a 270 cam and upgraded all of the small parts like (titanium valves, new springs and rockers) anything he could make better he did. All new ignition and fuel system... He made the thing like a stock car engine, cost him 4000. And he Dyno'd it and got 370 hp and 436ftlb's of tourque. That is why I have a 302 in my truck... And also, if you want to do something like that to an engine. The 302 is the easiest engine to do it to. There are more parts and that makes for more of a selection.

P.S. Remember... Weight is a major factor in drag racing. The 302 is light weight, but it also depends on what you put it in.... I have seen somone with a stock 351 in a Stang and somone with a stock 302.. Guess who won ?

 

Sorry racerdave, but I've got to disagree w/you. No doubt, 302's can make good power, and yeah, they're a little lighter than a 351w. Not by much, however. I would like to see your friend bore and stroke a 351w (they can be stroked to 428+ cu. in.) install machined (ported) alum. heads, cam it out, basically completely build it, and see the power difference. What is really odd is that it can be done for not much more money. Edelbrock claims that in a 10.0 to 1 compression 351w w/just their bolt-on parts they made like 410 hp. I think that includes heads, intake, carb, cam, and fuel pump. Maybe something else too, I can't remember. That doesn't even include anything like stroking. That's on a single carb as well. Oh yeah, I think they may have had roller rockers.

The easiest engine as far as parts selection to hot rod are the small block chevy's, but who wants a chevy. If you really want the hp and torque just get a big block.

Oh, and about the mustangs. There are many differences betwen stock 302's and 351's mainly depending on year produced. If it was two late model 'stangs, it's pretty likely that one had the stock h.o. engine built for the mustang, and hi-po lightweight cars, and the other had done some kind of engine swap, which probably either meant a heavily smog-restricted engine or a truck engine. They may have even been two different year mustangs. It's been a while since Ford put a 351 in a 'stang from the factory. If the cars were old it's untelling what kind of milage and abuse were on the engines. You have to think about all the factors.

Bottom line- 302's are good engines. They aren't weak at all. I'm not trying to put them down. But there is no replacement for displacement, so w/equally built 302's and 351's, the larger one will probably always kick more butt, for not much more money, or weight. Don't forget that the 351w's also have a much stronger block than the 302. It may cost a few hundred extra bucks to build a 351 because things like intakes and distributors won't swap due to greater deck height. But if you're going to spend 4000 bucks building something, what does it matter.

 

First off, let me clear some minunderstandings, this truck is a 4x4, there is no possibility of this truck ever going to a drag strip, the only reason i would need the speed is if i'm mud hole way to deep for the truck, and even then i dont need the tires to spin at 90 mph, this trucks use will be mostly used for hill climbs and some minor rock crawling ( nothing to major ) the gearing will be to low for speed. But i can see your reasons for going with a 351, and all of your input has been most useful, thanx guys and keep 'em coming