What It Takes to Run 40s on Your Rig | Harry Situations
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- Опубліковано 26 лип 2020
- Nothing commands respect on the trail like 40-inch tall Nitto Trail Grapplers, but it takes a lot more to go from a 37-inch tire to a 40-inch tire than it does to go from a stock sized tire to a 37-inch tall tire. We aren’t just talking about a lift, kit, the weight and leverage from such a large diameter tire requires upgrades to axles, gearing, and braking in order to safely run such a large tire. Harry Wagner from Harry Situations has upgraded all of these components on his ’77 F150 in order to run 40-inch Nitto Trail Grapplers.
Harry compares the ground clearance, weight, acceleration, and supporting modifications necessary to run 40-inch Nitto Trail Grapplers compared to 37-inch Nitto Ridge Grapplers on his ’77 Ford F150. Then he hit the trail and went wheeling with Mike Henderson from All-Terrain Family. Upgrades made for the bigger tires include:
• Super Duty axles built by Axleline with disc brakes, Detroit Lockers, and 5.38 gears (the lowest you can get for a Sterling axle)
• Nate’s Precision swapped in the 460 that LA Speed built with Edelbrock heads and intake manifold, roller cam, and FI Tech
• Axleline retrofitted hydroboost from a Super Duty
• Hydraulic assist steering from PSC with an upgraded pump with enough pressure and volume for the hydroboost and steering ram
So why is Harry so hung up on weight? Unsprung weight, which is the weight of the axles, brakes, and tires, and wheels has to be controlled by the suspension. The heavier they are, the harder the suspension has to work. Also, tires and wheels are rotating mass, so the larger and heavier they are the more work the vehicle has to do to accelerate and the harder the brakes have to work to stop you. If it sounds like we are trying to talk you out of running 40s, we aren’t. We love them on our Ford, but after seven years of costly upgrades it can only be described as an emotional decision, not a rational one.
Drop a comment and let us know what you want to see next from Harry and Mike!
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I'm so glad I found Nate through your video's. He does all the work on my Jeep now and I am really happy!
Great video! so many folks don't think about the impacts of going to larger tires. It's so much more than just getting enough lift to clear the tires.
I have loved this truck since you got it for Cheap truck. With that 460 it sounds as mean as it looks can't wait to see more of it!!!
Deep pockets that’s what it takes
Great video! Communication skills are top notch along with the information. Thanks man
Great video, I was already planning 40's for my K30 so this just solidifies my decision!
Great video. Cool truck. I just finished a79 bronco 500hp 6.0 built 4l80e . Has 410s/35 swapping to 9" out for 14bolt and building up the 44 and going 4.88 and 37s....its never ending cash dump. I love it
Great short write up. Would love to see more of the truck rock crawling like towards the end of the video.
We will get more footage of the truck on the trail soon!
Great video
The first iteration of this truck when it just had 41.5in rockers was pretty badass and similar to how alot of trucks end up on 40s lol
Love that truck 😍
More videos by Harry, please. That was awesome.
Thanks!
@@HarrySituations by any chance do you know what lift was on the truck when you run it on cheap truck challenge
@@dakotasplace5021 it had 4” BDS lift springs in front and lift blocks in the back. It was terrible with the negative caster and axle wrap, I don’t recommend it without radius arm drop brackets and new springs or a shackle flip in the rear.
@@HarrySituations I liked the way it looked a lot with big meats but it wasn’t super tall I’m wanting to something similar just to go have fun with but not sure what I wanna do
I'm so glad this truck would be 20+ grand now if you could find one at all because I really dont need to have a $1200 yard ornament that I just sit in everyday and go "vroom vroom"
I think I saw you on 80 by the Nugget driving this a week or two ago. I lol'd because it's an era of vehicle that isn't common any more.
It goes down the road pretty well!
Great vid! I always thought your truck was badass! I follow you on instagram and was very happy to see a youtube video! I am buidling a 79 F150 and I'm trying to decide the tire size. I have a dana 70 rear and the front is stock dana 44. I heard the dana 44 with cast radius arms mounts weren't very strong and was considering swapping it out for an older dana 44 from a F250. I plan on running a Cummings R2.8 with the 37.5x13.5 Cooper STT pro tires on Battle Born beadlocks. Thanks, your video helps a lot!
Sounds like a good combo! The only hitch might be swapping in the F250 axle because it has leaf spring mounts instead of wedges for your radius arms.
Not going to lie Raymond looks really good with the aev wheels
Those wheels look good on everything!
"Nothing commands respect on the trail unless you know what you are doing". There. I fixed that for you.
Really enjoyed your video I wanted to ask you your race line wheels did you paint those or did you powder coat them Or did race line to them thanks again awesome video
Thanks Tim! The wheels were painted locally.
Didn't take me long to Sub
wow, this topic is so important with everything going on in the world right now, LOL.
you have no idea.... lol
460 7.5 big block is a work horse ! Shitty gas mileage but they’re 😍
Definitely not great mileage! I drove the truck to Alaska last summer and it cost a fortune.
Really good info. Why are you running wheel adapters?
The AEV wheels are 8x6.5 so I needed the adapters to put them on my Super Duty axles.
Harry, Thanks for the videos! Good stuff. You mentioned a roller cam. Do you have a grind number or do you know the specs? Also for your injection are you running a single or dual plane intake? Thanks man!
The cam is Comp Cams 34-432-9 and the intake manifold in an Edelbrock Performer RPM dual plane. I originally had a smaller cam because I was after low end torque but it wasn’t as good of a match for the intake and heads.
Awesome! I have a ‘78 f250 with a 4spd. It has a .030 over 460 with the edelbrock RPM kit just carbureted. I want to go full roller motor with an injection. You always see engines on the Dyno but you never see how they react in a vehicle especially a heavy truck. From the video your truck looks like it has power in all the gears. That’s what’s behind the cam question. Thanks for the reply! Really appreciate it!
Love the truck! Was curious what your thoughts might be on this. I’m looking to upgrade to 37s on my 1986 f250. I got a Dana 60 with a Detroit locker and 5.13 gears to swap in. And a 396 stroker mated to a c6 trans (3sp). Should I keep the 5.13 and swap that gear into my sterling to match or go to something around a 4.56/4.88? The f250 is going for more of a heavy off duty camper/ trail rig. Thanks!
I think the RPMs will be high at freeway speeds but since the front already has 5.13s I would stick with them.
Thank yeh, I appreciate it! That’s what I was thinking but needed to convince myself with some outside opinions.
Hey Hary, what's that bar in front of your front axel? Is it a stabilizer?
It is a PSC hydraulic assist ram. Definitely a requirement when steering 40s in the rocks at single digit pressures.
Harry,
Who do you recommend getting wheels spacers from and what size did you use. Any issues with them while you’re off-roading?
Thanks!
I have Spidertrax spacers on my Tundra and my Jeep and like them, but they didn’t make the adapters I needed for the Ford so I got these off ebay. I haven’t had any issues with them but the truck is already wide and I find it troublesome on some trails when it is 4” wider.
Do you think my 2016 F250 would manage the 40’s okay with 4:56 gears? It currently has 37s and there is excellent acceleration on road with great crawling ability off road. I’m wondering since it’s a newer platform if it’s just able to take more for off roading.
Yeah you basically started with the axles I swapped in to my F150.
I have the same Racelines on my Jeep. How did you get the orange accents on the inside of the wheel? Is it powder coated? I'd like to add a pop of color to mine
It is paint. And it took forever to mask! I think the end result is worth it though.
Lots of money on that truck wow.
I’m turning 16 soon and I was wondering if 38s would fit under a 2000 f250 with a 3 inch body lift and a 6 inch suspension lift?
Yeah that should be plenty of lift for 38s.
@@HarrySituations okay
I not concerned with. Crawling anymore 66 years old. What would be the best the set up with 40s or 44s to run major interstate's like I-75? JUST want to run hard and everything be right. Just want to see the country and have a rig to handle the weather.
Why would you need 40s to run down the interstate though? Do you own a gas station? And if so are you looking to adopt???
What components do you recommend upgrading on a 2018 1500 GMC Sierra with a 6” BDS fox resi coil over lift that’s been reheated with 4.56’s..that runs 37’s?
Sounds like you already have a pretty good combo! Have you upgraded the tie rod ends?
@@HarrySituations BDS provides some longer tie rod ends with the kit but not sure how they would compare to kryptonite’s..
How about if you get a flat tire? Tough changing such a heavy tire and wheel.
Hasn’t been an issue but I do have a 40” spare in the bed. I also carry tire plugs and onboard air.
Hey Harry, do you think I could fit 37’s under a 1978 f150 with a 4 in lift?
Most 4” lifts specify a 35 but if you don’t mind a little trimming you will be fine.
@@HarrySituations Thanks!
What kind of exhaust do you have on it?
It was custom made by Nate’s Precision with 3” mandrel bends and a Walker muffler.
Was that in between lemmon valley and sun valley?
Yep. Good eye!
@@HarrySituations I just went through there 4th of July in my zj
Can a IFS 31 spline Ford 8.8" handle 80lbs. 37s? I want to toss some Mickey Thompson Baja Boss ATs on my 1998 4WD Ford Expedition.
I think that is pushing it in terms of weight and leverage, but if you are easy on the throttle and don't mind doing maintenance for things like CVs and ball joints more often you can get away with 37s. I'm sure they will look awesome on your Expedition!
@@HarrySituations Hey, appreciate it man. I'm upgrading to polyurethane bushings all around, so hopefully that reduces the torque and overall stress on some of my other componenets as well.
@@HarrySituations Hey, appreciate it man. I'm upgrading to polyurethane bushings all around, so hopefully that reduces the torque and overall stress on some of my other componenets as well.
Nice video. Just saying, stayed to hear the big block...
Ok so how much lift?
It has 6” BDS coils in the front and Deaver leaf springs with an Off Road Design shackle flip kit in the rear. (And a lot of fender cutting)
What if the 40” tire weighs the same as the 37”?
Then the only concern would be the added leverage from the taller tire.
A smaller diameter tire covers less ground for each revolution. A larger tire covers more ground. Torque is a measure of force over distance. More distance with the same force= less torque.
@@kingofbrutaltheocracy9201 talk to me like im stupid, are you saying 40’s weighing the same/less than my current 37’s would be ok/ better?
@@JamesM0M 40s will be a little slower to accelerate, they wont pull as hard as a smaller tire. 40s will put more stress on your axel shafts, dif, driveshaft ujoins and trans, but not a lot more than 37's. :)
Edit: even if the weight is equal, the above is true for any larger diameter tire.
Maybe it's time for a brake proportioning valve. sounds unsafe on the streets tbh.
It’s not unsafe on the street, the entire braking system from the master and the hydroboost to the calipers and rotors are factory Super Duty parts.
44s
37 gumbo mudders is my choice 14 lbs in rock or mud,,re air when you go back to pavement
Are Gumbo Mudders still being produced?
@@HarrySituations yep
dont even need to watch the video i say 44's but thats not a choice so i say 40's