Building the perfect 351W

[Raskew]

I have a 69 351W, with a C4 tranny which I want to rebuild. It's new life will consist of 90% daily driving, and 10% offroading.

To all the mechanical experts out there, how would you rebuild it to create a dream 351W.

Rick

 

[76Broncofromhell]

I say stroke it and give it more power. Why be modest with it. Make that thing a tire-burner

 

[eBronc]

For your needs (90% daily driving):

.030 overbore

moly rings

stainless valves (3 angle cut)

hydraulic roller cam, 270-280 duration, .450-.500 lift, install 4 degrees advanced

double roller timing chain

high volume oil pump

mildly ported heads (concentrate on exhaust ports)

Edelbrock Performer intake

Duraspark distributor triggering an MSD

Qjet installed facing backwards using a 4-hole adapter

Mustang 5.0 aftermarket shorty headers (yeah, they'll fit)

True, there's no expensive or exotic parts listed, but for your intended usage, you'll have a nice, durable, strong motor that'll start every day, have great low end torque and midrange, awesome throttle response, and not cost you an arm and a leg.

 

[wildbill]

;D ;D ;D eB's but called it that would make a sweet running motor. I like the long tub headers over short ones. But eather will work. good luck with your's. ;D ;D ;D Bill %)

 

[BUCKETOBOLTS]

I'd give the 393 stoker a look. Since you are going to bore the block .030 you will have to buy new pistons. The 393 uses box stock 302 compression height pistons. I've priced the Hyperutectic Speed Pro's for around $12 a piece. Reuse your 351W rods. The only big purchase is the crank. I've seen the cast cranks on Ebay for $300. But if you must have your stock crank turned and polished your looking at up to $200 labor. Add it up and you have 42 more cubic inches for less than $100 more than a stock rebuild.

 

[NYBronco]

351w

I recently went through the same question. Answer-
351W stroked to 408.
Edelbrock performer rpm intake
Edelbrock high flow water pump
Eagle stroker kit. All forged rods and crank
bored motor 30 over
Lightly ported heads
Ford motorsprt roller rockers
Ceramic coated headers
Motor balanced and blueprinted.
Final result - 376 HP and 463 ft. lbs of torque. off dyno machince
Low compression ratio of 9.4 keeps it good for using cheap gas and overall great as a daily driver.

 

[Raskew]

Great ideas so far. What if money was no object? Would/Could you supercharge a 69 351? What would you build if you won the lottery?

Rick

 

[Gummi Bear]

Great ideas so far. What if money was no object? Would/Could you supercharge a 69 351? What would you build if you won the lottery?

Rick

Sell it for a monster profit, and put in a 300 SEFI. Bronco's are not drag race machines, they are utility vehicles. Embrace that spirit. Building a motor that doesn't come to life under 5000 RPM is OK in a dragster, but has no place in a 4wd utility vehicle.

 

[JaxLax]

What if money was no object?

find a way to cram an older 7.3L power stroke diesel in the bay. chip it. banks kit it. add propane. ;D

then sit back and enjoy eating jeeps and vipers for lunch :-*

 

[kb6677]

more 351 ideas

Here is another approach to your "perfect 351" post-not to step on anybody's toes who has posted but as for the stroker-393 and 408-WHY spend that much money on a stroker kit when you don't have to??? Bronco from hell-you have my lunch at 500hp(I would like to see you put that pwr to the ground 4wheeling with us with a d44 front axle-but I digress The high 390to 400 hp by the 393 stroker kit is reasonable from other friends I have who run that combo. The combo I am running (3years with no hangups so far!) is:
94-96 351 W roller motor deal-redone obviously with the following:
30over with 9.5:1 pist-your choice-get good ones,
light bal. work on block and internals with good matching of components during as.
custom ground Comp Cams dual pattern roller cam(cam specs locked in the skunk works vault), rpm band is idle to 4200
1.6 roller rockers
LOTS of head work intake and exhaust
GT40 upper and lower intakes, 65TB and &70 MA-, 24lb inj.
shortie WH/JBA headers, 2 into 1 3" exhaust with a single 3" Flowmaster Delta Series race muf. FR harness mod., stock '92AOD puter
Cooled with a Ron Davis double pass Al. rad. of course
Now the punch line +- 5% 400 hp and 475 ftlbstq
It works well on the trail, rocks, etc.. inc. the street. For impressing the neighbors, if I was on the street 90% of the time I would go up abit on cam-noise is good if it is backed up!!!
FWIW,
KB
NC

 

[BUCKETOBOLTS]

Our "hard" trails are quite different than the ones out west; with they're near perfect traction. More times than not, you'll find the trails at Tellico to be wet with several of the hardest obstacles have seeping springs located right at the base of them. Ultra low gears are not needed here and sometimes hurt more than they help, as wheel spin is required to clean the tires and heat up the rubber in hopes that they will stick to the wet rocks. You will see a lot of local rigs here with 300 horsepower and tires in the 40"+ range.

I remembered reading this on tellico4x4.com sometime ago. Its a good reminder that not everyone has the same needs for a trail rig. Here on the East coast the trails are very different from the ones I see in magazines. I prefer alittle extra HP and torque.

P.S. Don't pay much attention to the 300hp remark. The comment came from a wimpy Jeep site.

 

[76Broncofromhell]

Yeah KB there's that thing called the gas pedal. I keep my foot out of it and all goes well. The thing is I don't really abuse my Bronco because it is my only mode of transportation at the moment. Yeah it's got some "lope" at idle but nothing too bad. It just smells bad when you're next to it.

I disagree with Gummi Bear on the motor thing but we probably use ours differently, mine goes offroad occasionally but is a daily driver. Having lots of low-end torque is cool, but having enough power to shatter things down the drivetrain is also cool.

 

[TonyPDX]

315W Torque monster

My ideal:
94-96 5.8L roller motor with SEFI (Mass Air), long tube headers, 70mm TB and MAF, 30lbs injectors, Edelbrock perfomer heads. Factory fuel injection really makes a big difference in driveablity, economy, and boosts low end torque compared to a carburator. Keep the compression at 9:1 or less (maybe 9.5:1 if your running aluminium heads).

Still not enough? Add KenneBell Ssupercharger, 500ft/lbs torque @ 2500rpm now that is a truck motor! Peak horse power? I don't care what the motor does after ~4500 rpm as I am not racing it.

Tony

 

[Bart]

Hey TonyPDX what does tha 94-96 5.8 Roller motor come out of????????

 

[76Broncofromhell]

Bart- from 1994-97 any truck with a 351W was a roller. 94-96 F150's and Broncos and up to 1997 F-250's. Hope that helps

 

[TonyPDX]

As I understand it the 94 and up blocks are designed for roller cams but that doesn't mean it was actually built with a roller cam. I call Ford Racing when I got mine because I was unsure wich cam it had, they indicated it may be a roller because it was a 94' and up block but not all 94' and up motors were built with them. I had to measure a push rod to be sure.

I would look one of the vehicles 76Broncofromhell sugested then verify a F4..... casting number on the block then measure the push rod to be sure.

Tony

 

[Raskew]

Can you put a roller cam in a 69 351W. If you can is it worth it?

Rick

 

[TonyPDX]

Yes you can with a retrofit kit. Is it worth it??? Maybe... Roller cams have a little more flexibility in their design so they can run higher lifts w/shorter durations than flat tappet cams plus they have less frictional losses. The OEMs are using them so there must be a very tangible benefit to efficiency for them to spend the additional dollars on something the average customer would never notice. I think they are worth it, but I am sure others would disagree.

Tony

 

[Labbster]

If I used eB's formula, and put EFI on it, what size of injectors, MAF meter and TB would I have to use? Would the Mustang (19 lb. injector) set up work?

 

[rjlougee]

All the '94 and later 5.8s were roller blocks, but not necessarily roller cammed. The F4TE block marking will let you know it's designed for it. Just about all the truck engines EXCEPT the Lightning engines were roller cammed. The Lightning got a flat tappet cam.

How you inject it depends on how you build it. Using what eB suggested, I'd probebly go with 24# injectors, 65mm TB and 70mm MAF. You could get away with the stock 19# injectors if you're on a budget, but they'd pretty much run out of pulsewidth about 3200-3500 RPM.

I run that exact setup (19/65/70) on mine, but I live at 7000' elevation. The air's a lot thinner here and it falls on its face about 4000RPM.
Joe