have any of you guys with the 94-96 302 equipped trucks taken your roller block and equipped it with a 347 stroker kit. I am just wondering what horsepower and Tq numbers were actually gained and if it made it a better truck engine?

 

I wouldn't put a 347 in a big truck. I would just go with a 351 for torque.

347 would be better suited for a "hotrod" truck. For high rpms and top end power. 351 for low end torque.

There are a few people that have though.

 

I have built quite a few 347's for mustangs and I have actually put them up againest 351w on the dyno with similiar mods. The 347 will do what the 351w will do with ease in both hp and torque plus you dont have to change brackets,dist,intake etc for the taller deck. If you opt to do a 347 go threw coast high performance for the shortblock. They use a 5.315 rod to bring the wrist pin down so its not in the oil ring. Early 347's had problem with oil comsumption and they corrected it. You can make 450-500hp {crank} with the right heads/cam setup.

If I was doing it with a truck motor I would suggest a setup of

185cc AFR's 58cc chambers upgrade the springs
xe274hr comp cam
1.7 rr
1 3/4 lt's/dual 3' exhaust with x-pipe 3' mufflers
eddy intake for the 5.0L w/ larger tb or some serious port work in the stock one,
underdrive pullies
custom air intake {4' to twin 3'}
pmas 95mm meter
30lb injectors

thats what I would do. Similiar setup in my stangs made 401/400 and had power from 1500-5800rpm

 

i like both the 347 and 351. yes the 47 had problems with oil consumption but they have fixed it. is your truck a mass air engine? if not you can forget any upgrades until you fix that

 

If I was doing a truck engine I would go with a 351 block stroker in either 393 or 408 CI.

 

There's no reason a 347 wouldn't do everything a 351 would with the same parts.

 

It can be done w/ the right parts. Go to sbftech.com, join, post & learn.

 

The 351 standard block is much stouter than the standard 302 block. It has larger main
bearing journals and rod journals than the 302 which provides for more main/rod journal
overlap on the crankshaft which makes it stronger. The webbing in the block around the mains is all so heavier than the 302. Lastly the rod bolts on a 351 are 3/8 vs 5/16 302
rod bolts. This is why a 351 makes more HD engine for a truck than a 302 based stroker.
Anything that can be done to a 302 to make more power can also be done to a 351 for
about the same money including stroking it for more cubic inches.

 

thanks guys. It's just a hypothetical questions. I seen so many ads with 347 stroker i was wondering what one would do in a heavy 4x4. The reason i said 94+ F150's is because my truck is the first year for Mass Air flow from the factory with the 4r70w tranny. I was Considering upgrading the 302 because i am afraid the tranny won't hold up to a built 351w. The 302 i got in the truck right now doesn't have any trouble getting me around except for when i am going up a steep hill there for i can't justify ripping it out when it runs good and doesn't smoke or use oil.

 

It depends my 347 kit came with rods that had the larger 3/8 ARP bolts.
Unless you are going crazy hp like over 500hp i have never really heard the block being much of an issue

 

thanks for the replys sorry it took me so long to reply back but i have been busier than a one legged man in an *** kicking contest.

 

A 347 built with a truck powerband... less peak HP and more low end TQ.. won't have any durability issues. The 5.0 truck intake is also better suited to this displacement than the 5.8 intake so that's one thing that doesn't have to be replaced. Besides the stroker kit itself this could be done relatively cheap, just need some better heads and a cam and possibly an upgrade on the MAF and injectors depending how much better the heads are. I'm think a set of CNC'd E7 from Thumper($600), Comp 35-320-8($300), and a 9:1 cast stroker kit($800) from strokerkits.com for a solid 330hp and 410TQ.

 

That would be an interesting combo Paul. Your power guesstimates look spot on to me. I also agree the 5.0L EFI intake is a decent piece as is, much better than the truck 5.8L EFI setup.

 

Thanks Paul. thats all the power i would need and then some. i will make sure to take a look at those parts. what kind of an upgrade on the mass air flow would i need. would the stock mass air flow sensor not be able to compensate for the upgrades mentioned? how big of injectors should i get as well? thanks guys for the help

 

You could make the 19lbs injectors work with this by increasing fuel pressure, at stock pressure they would be running at 90-95% dutycycle at peak hp which isn't good for their lifespan, upping the pressure will reduce the dutycycle needed to deliver the necesary fuel. The stock MAF is big enough for this HP level and the computer would adjust the fuel maps below WOT to compensate. Another option would be to swap in 24's with a matching(calibrated) MAF meter and leave the fuel pressure alone, this too will produce pretty good result and leave you more headroom if in fact the motor breathes a little better than the predictions.