Flashback F-150 Project Update - Trucks 4x4 @ Off-Road.com
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Flashback F-150 Project Update

Source: Off-Road.com

It's been several months since we began work on our 79 F truck, and by and large it's been an informative, and surprising experience. Informative in that we've learned just how capable a "general purpose" vehicle can really be, and surprising in that the response from our readers has exceeded our wildest expectations. In fact, just about every letter has included some version of the following statement… "It's about time that a publication paid attention to the full-size market." While those of us on the Ford side of the fence would like to hog all the credit, the Chevy guys have played no small part in building a loyal full-size following. In addition to projects "Flashback F-150" and "Great White", the Chevy known as "Potent Rodent" has given our readership hope that not all off-road vehicles require a Jeep logo to perform on the trails.
The aptly named "Bronco Falls" in Logandale NV provided the backdrop for an afternoon of climbin' and crawlin' in our newly capable F-150. contrary to popular belief, there's plenty of room for a full-size F-truck.
With the Flashback project now well underway, we've had time to live with, and thoroughly evaluate the products we've bolted up. now it's time to give you an interim report on what we've learned. By and large, the results have been positive. That in itself says a lot about the state of todays 4x4 aftermarket. Quality products are no longer hard to come by. Mastercraft Seats You'll likely remember the glowing review we gave the Mastercraft "Prerunner" seats a few months back. Well, with over 5 months of use, our original opinion hasn't changed, but our respect for these quality pieces has grown considerably. After being subjected to a slob of an owner (me), the full brunt of the Vegas sun, and no small amount of sliding in and out of the saddle, these seats are in perfect condition. There is no detectable wear, the foam padding hasn't settled, the lumbar support works great, and they have survived multiple spill / clean cycles without a whimper. Spending as much time as I do on the road, these seats have proven to be a godsend. The higher than normal side bolster does take some getting used to, but it's proven a very small inconvenience when compared to the payoff in driver/passenger comfort. Off-road, the Prerunners' have lived up to their hype every time the rubber leaves the road. Jacobs Off-Road Ultra Team We've put a lot of trouble free miles on the new Jacobs unit both on and off the highway, and it's done wonders for our fuel bill. It's also done wonders for our trail performance. Now that Flashback has evolved into a highly capable trail machine, we've been spending lots more time testing its limits. As you can see from the pictures here, we've been none to easy on the old war horse, and trails like this demand performance, not promises from your equipment.
Proof positive that you don't need a Jeep to have fun in the rocks. Superlift suspension and Detroit Lockers add up to serious traction when you need it most.
To date, the Off-Road Ultra Team hasn't let us down. The truck continues to fire instantly at the turn of a key, and the benefit from the Jacobs "Uphill Power Module" are evident every time we get into some "less than level" situations. When used in its element, the Jacobs box has proven itself top notch. Hell, it does pretty well everywhere else we've tried it too. Superlift 4 in. Suspension To be fair, we've been pretty hard on our suspension from the day we bolted it up, and we gotta' say that it's performed exceptionally in every aspect but one. The shocks. Now in the interest of full disclosure, we blew the two front units jumping the truck - a condition for which these units were never designed. In "normal" off-roading situations, they performed very well, and were worlds above the functionality of their stock counterparts. Perhaps it just happened that we got a couple bad apples? The rear shocks held up fine to the abuse, and were only replaced after we hyperextended them one time too many. This was clearly our fault, and should not reflect negatively on the product. As for the rest of the kit, we maintain that it is an outstanding product. Repeated airtime, rockcrawling, and high speed blasts across the desert haven't dimmed our enthusiasm for the kit in stock form. It's done everything we've asked, and returned to fight another day, time and time again. Our only gripe is one of personal preference, and easily addressed. The overload leafs that come stock on the Superlift spring packs left the truck a little too inflexible for heavy rock work. We recently removed the offending leaf from the stack and were rewarded with a far more supple suspension than we had before. While we're sure this will void Superlifts' warranty, we're willing to forgo it in favor of the improved ride and functionality. Bottom line? We strongly recommend the Superlift 4in. lift, but if you plan on entertaining any "Ivan Stewart" fantasies, you'll be better served with shocks to match. Saner off-roaders will like the kit's units just fine. Goodyear Wrangler MT/R Sized at 35x12.50x15, our MT/Rs have been wholly trouble free for over 10,000 miles now, and are wearing exceptionally well. Highway manners are great for such an aggressive tread, and their off-road performance leaves little room for complaints. Thusfar, the only thing that has slowed their forward progress was the mud-slicked logs of the BITD Tough truck meet here in Vegas. Even then, a little heavier application of the right foot got us up and over with no further fuss.
Of course, a lot of credit goes to the Goodyear MT/Rs for keeping the truck moving forward. Even at highway pressure, the big rubber stuck like glue to the slickrock formations.
In the rocks of Logandale NV or the sands of Nellis dunes, the MT/Rs have carried the heavy Ford forward, backward, up, down, and sideways with authority - and even on 3-1/2+ rated trails, I've yet to air them down. Sidewall damage has been non-existent, bead sealing has been total, and as we said earlier, wear is minimal. I've fielded a lot of questions about these tires, and recommended them a dozen times over. It may sound like gushing, but facts are facts. These tires are very impressive, and I'll be damned if I can find a performance fault with them. Randy's Ring & Pinion
Yukon 4.56 Gearsets & Detroit Lockers
If you recall, we took the Diff God's recommendation of the Yukon gears and the Detroit Lockers for Flashback F-150, and he was right. It was like driving a different truck. In our conversation, I'd told Randy that I was willing to live with the Detroit's quirks and bad habits in the interest of dead simple reliability. Well, now that I've been living with them for a while, I don't regret the decision. I will say though that there is a learning curve. The sudden sound and "twitch" that goes along with a diff suddenly unlocking has left me wondering whether or not I broke something, and it turns pedestrian heads when it happens on the street. I finally had the chance to learn about the Detroit's street manners on wet pavement, and I can see why they may not be the best choice for short wheelbase vehicles or even full size rigs in moist/snowy climes. You definitely have to pay attention to what you're doing, or you could get in trouble fast. As long as you stay on top of things, you'll be fine.
The SpinTech mufflers are the hot ticket for abusive wheeling. The thick walled construction acts as it's own skid plate when you run out of ground clearance.
Off-Road? God, tell me how I ever survived without lockers? I'll say this - novice wheelers really need to develop their off-roading skills on an open diff vehicle because once you're locked up, you think you're Superman. Obstacles that would previously stop you dead in your tracks suddenly become speed bumps. Well, perhaps that's stretching it a bit (lot), but seriously, a locker equipped vehicle can get you into trouble (IE: situations beyond your skill level) faster than you may be able to get out of. Once you have the basics down though, a pair of Detroit Lockers will likely be the best investment for your truck you'll ever make. The Yukon gears have remained quiet and trouble free. Once broken in, I changed the lube and have largely forgotten about them. They are performing their job with no fuss or muss, and the ratio is the perfect compliment for the 35 in. tire diameter - even without an overdrive. SpinTech Mufflers Our last modification to Flashback was a pair of SpinTech's ubermufflers, and they have been a great addition to the project. The unique exhaust tone coupled with reduced back pressure gave our new 400 CI engine a freer flowing system when coupled with the custom pipe work of Henderson NV's Hot Cars, Cool Trucks. Still love'em, still recommend'em. Interior Updates The door panels and dash cap from Coverlay Mfg. are holding up just fine thanks, but the same can't be said for the Lightning Audio amplifier. It seems that due to user error, a little moisture found it's way into the workings, and, well, "Poof!" OK, ok, I left a window down and it got rained on. My fault. The Crow 5-point competition harnesses have performed flawlessly, and look as good as the day we bolted them in. I haven't had any reason to call up Herman DeNunzio and complain (mostly out of some primal fear that I can't quite explain - something to do with his buddy "Guido" I think) Autofab The seat mount for the Mastercraft Prerunners hasn't given me a lick of trouble either. Not that any was expected. The heavy duty piece has a single job to do, and it does it well. Got Mastercrafts? Get one. End of story.
Photographic evidence aside, we maintain that this isn't a "rockcrawler", just a good all around 4x4. Recent mods to the rear spring pack opened up even more articulation, and vertical wheel travel for our desert persuits. With the basics covered, it's time to get into more serious mods to the truck.
Other Additions Along the trail to general-purpose bliss, we installed a remanufactured 400 CI engine from the good folks at Pep Boys. Sure, we coulda' shot our wad and threw down cubic dollars for a custom-built performance engine, but let's be realistic here. How many of us are going to shell out the dough? How many of us really need 600 HP at 7500 RPM? Most of us shmucks can and will fork over the 1200 semolians on a re-man, then add a few goodies as time and fundage allow though right? Good answer. After ditching the tired 351M, the 400 bolted up as if it was designed to - probably because it was. It's basically the same engine as it's smaller brother, and was in fact offered as an optional mill. Listed at the same price, the 400 provides an extra 49 cubes, so the choice is easy to make. We abandoned the stock 2bbl intake and manifold in favor of a free flowing Edelbrock Performer intake and 600 cfm 4bbl carb, adding both mileage and power to the factory numbers. While we're still fiddling with the jetting, the carb looks to be a good all-around choice for the off-roader (once you add the "off-road" needle and seats) but has trouble with extreme angularity. I foresee fuel injection in the 400's future. Even with addition of the Jacobs Ignition, 4bbl, and SpinTech exhaust, the performance of the engine still seemed lacking. Respectable, but lacking. We're talking 400 cubes here - and "Cleveland" cubes at that. That displacement should provide plenty of go for anything. After buying up every book we could find relating to the 400 (all of about 3 of'em), we learned that Ford (in it's environmental wisdom) had retarded the cam timing a full 4 degrees to meet emission specs. What it did was knock about 40 HP off the top, increase fuel consumption (and thus "emissions" - DUH!), and accelerate engine wear. The weak 8 to 1 compression doesn't help either. While we can't do much about the compression without a major rebuild, we can address the cam timing issue easily enough. Look for an upcoming cam swap to solve our performance woes. Nothing to radical mind you, just a good swift kick in the valvetrain. Flashback F-150 - Stage 2 On Deck For all intents and purposes, we could stop here and call it "Done!" The modifications performed on Flashback F-150 thus far have resulted in a fully trail capable rig that you can live with all week long, and won't gut the kiddies college fund. Of course, what fun would that be? There are plenty of mods in store that will result in an even more capable weapon for the off-roader's arsenal. With the insanity of the Baja 2000 behind us, look for the long awaited Klune-V Goliath reduction box installation, along with the equally long awaited NP 205 swap from National Drivetrain. With the stock NP203 nearing the end of it's life, this is a "do it NOW!" kinda' thing. Since we're going to have a perfectly good (and sparkley clean) NP 205 sitting on the floor, it would be a shame not to do the Currie Twin Stick conversion before we bolt it in. For those caught unaware, the twin stick conversion entails adapting the Currie Twin Stick shifter designed for a Dana 300 x-fer case to the 205, and results in any possible combo of high or low in 2 or 4 / front or rear wheel drive. It's the perfect compliment to a front locker and a Klune Planetary box. Rounding out the drivetrain will be an all new C-6 auto from the gods of the slushbox over at Valley Transmission. We're going to get a little carried away here and go with the manual valve body and E4OD gear set. Necessary? Hell no, but you cant beat the performance of a manually shifted auto, and sheer "cool factor" that goes with it. Lastly, South Bay Driveline has pledged a set of brand spankin' long travel driveshafts to compliment the added output of the powertrain. Remember, thet Klune box builds viscious torque. Designed for serious flex/travel and equipped with 1 ton u-joints, we doubt we'll experience driveline failure even under obscene conditions. Protecting all that hardware seems like a good idea don't ya' think? As we're moving into tougher terrain with the big F-truck, the need for body armor is becoming increasingly apparent. That said, we've decided to take a page from the Jeep book (perish the thought!) and have the entire body sprayed in Line-X. Don't worry folks, it's still gonna' be red ;-) Since there aren't too many bolt on HD rock rails (well, none really) for the F-trucks, we're going to have to wander off the path into fabrication land, but we aren't going to get too carried away. The goal here is "minimal fabrication." We'll save the scary stuff for a later stage - one outside the goals of this project. Skid plates and higher clearance bumpers are also becoming a necessity, and fortunately, they're available off the shelf. Overall, we've got a lot more on deck for Flashback F-150, but there's enough here to keep us wrenchin' and you readin' for quite some time. I guess we'll just leave off with a little teaser about that double shackle rear suspension using a combination of factory and off-the -shelf parts……..Oh yes, we figured out how to do it with a minimum of welding involved! Who knows? Maybe we won't make you wait that long after all!
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