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Johnny's GoatBuilt JHF buggy build

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214K views 993 replies 64 participants last post by  JohnnyJ  
#1 · (Edited)
At post 110 I changed my mind and decided I would build a buggy instead of the Wag. The Wag continues to wait for it's next build.

At post 187 I ordered up a GoatBuilt JHF chassis to hopefully speed this up. (edit: nope)

Current Build plan:
GoatBuilt JHF Chassis, 108" wheelbase, "jeep" hood and grille
2007 Ford F250 Dana 60, 5.38, Sparty locker, JHF high-steer
- narrowed 4" to use 78 F250 axleshaft on the long side, using factory 1550 shafts
1998 Chevy K3500 14-bolt, shaved, 5.38, Detroit, 1/2t chevy disc brakes
39" BFG Krawler Red labels on KMC Machete Beadlocks
2001 GMC Yukon XL 6.0L LQ4
  • Holley TerminatorX EFI
  • Champ oil pan (high-ish clearance, baffled, steel)
  • Dorman LS2 car intake and Warr cable throttle body
  • Holley fuel rails with late-model 6.0 truck injectors (EV6, E85 flow rates, 12613412)
  • Goatbuilt accessory brackets, TC pump on driver's side, alt on passenger
  • GM 706 heads
  • BTR Truck Norris cam
TH400 built by Tranny Tom, Reverse Manual with Winters/WOD shifter
Atlas transfer case, 3.0 low range
Fox 2.5 air shocks
PSC Full Hydro, 2.5x10" ram, TC-pump
Mastercraft cheap seats with Impact 5-point harnesses
Griffin 31x19 radiator, Derale 16927 shroud and twin fans
Goatbuilt fuel tank and factory fuel pump
Magnaflow muffler mpe-12649

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I bought my Wagoneer in 1997. It was my first 4x4 and I bought it so that me and my friends could go camping and have room for our gear since we all drove econoboxes. That fall I ended up moving to Germany for 18 months and it went into storage.

When I got back I rebuilt the AMC 360 with the help of a friend, and we did enough maintenance on the rest to get it on the road. Over the next few years it got a 4" lift and went from 31s and then 35s when I put a 3" body lift. We did some wheeling with it and eventually I put it on 33 Stampers from my old Wrangler.

In around 2005 it was parked due to lack of time and using any spare time on my Wrangler. A few years later we stole the drive train for the TREC Wagoneer, and it has sat since.

Over the summer I got out of racing, bought a RZR and drug this back in the shop. I'm thinking I want to get it back on the road and trails.

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#957 · (Edited)
Ugh. I made a mistake.

When I made the hydroboost mount, I did not have the exhaust in. I thought saved enough room, but I'm off by at least an inch. So I've got to chew on it.

I can either :
a) install hydroboost and redo the rear exhaust behind the muffler
b) install hydroboost and use short dump right off muffler
c) reinstall manual brakes and return to this later.

At this point I'm thinking option c, and if I have time before going to South Dakota I can redo the exhaust. Option b may work, but it may be much louder and/or I could have heat issues with random exhaust placement.

I'm going to sleep on it, but I think slamming the car together and getting some test time is my best path forward.

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#961 · (Edited)
Interesting exhaust routing...I've been trying to figure out how to dump mine out the back and never thought about doing it like that.

I think option C or D would be a good path to go down. Don't load yourself up with stuff to do now. Sounds like your manual brakes work but not ideal. So just get it ready for your trip and reevaluate later.
 
#962 ·
After a night of sleep, I think I'll install old brakes and finish everything else and then reassess where I am at. The manual brakes are 94.732% good, but I know the hydroboost will make it better for holding on steep inclines/declines.

When the time is right, I think I can recreate the tail pipe with a shorter section in orange. That should give me the space I need. I know I have the 3" v-band pieces and I think some 3" straight pipe, but might need some 3" u-bends to make this.

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#965 ·
I dump my exhaust rite behind the t case. I don't think there is physically a way I can route it out from under with the way the chassis is built and with the 4 links in the wa. With the muffler I have, it is not too terribly loud inside. I would like it a bit quieter though. I do not get any nasty exhaust smells.

Sounds like option C would be the best route.
 
#982 ·
The manual brakes on my buggy worked, but required lots of pedal travel. In 4LO crawling down large drop offs, I sometimes was annoyed at it's holding capability. I generally just go into front low as it helps the push off feeling and helps the braking. It's not super common, but that was my biggest complaint.

I'm blowing up the entire setup right now. I wanted to try using an iBooster and in the process I'm swapping out calipers and rotors to match up with the stock ibooster master. Not sure how it'll work, it's more of a science project.

If I ever get to it, I plan the original rotors & calipers with a hydroboost system on my Wagoneer. For the buggy I decided I didn't want hydroboost, but for the Wagoneer I think it'll be fine. The reason for not wanting on the buggy was that when you are braking and steering, it can have impacts on steering. Given the buggy is a crawler, I wanted to avoid this pitfall. The wagoneer will be hydro assist and I won't be using it for the technical crawling that i use the buggy for.