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Johnny's GoatBuilt JHF buggy build

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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#791 ·
Gold heat shield was not a miracle, but kept it tolerable. I never shot a heat gun at the panels, but I didn't feel like they radiated heat; but they were definitely warm.

I came home with a short list of fixes. I put them in a note on my phone so I wouldn't forget. Nothing major on the list.

I do have some finishing bits like outer skins for wheeling in wet/colder temps. A few tubes to add for support. That's on the wall of the shop. I'm sure I'll always have more ideas; but overall I'm pretty happy.
 
#793 ·
So I was watching a youtube video, and heard another LS hiss at idle like my buggy does. I did a little research and apparently the WARR 92mm is known for this, and I may have to do some tuning to get rid of it. I have an el-cheapo refurb laptop on the way that I plan to use for tuning. Things I know need work are my fan on/off temps and now some IAC tuning.

If the shop isn't too uncomfortable this weekend, I hope to get the buggy up on the hoist and start looking for any unnoticed damage from the trip. I have a few things like protective boots for shutoff switch and some nylock nuts for some things that got loose that I can work on as well. Shop still needs a good cleaning, so may do that as well.
 
#797 ·
Played around with the buggy last night. My refurbished $200 laptop arrived this week and I previously picked up a programming cable for the Terminator EFI. I took the time to upgrade the firmware on Terminator, then played around with the online calibration tool. Changed my fan calibrations to 205 on / 195 off and 210 /195. I noticed during the trip that the fan couldn't pull the temp below 194* much, which looking online is the fully open temp for a stock F-body thermostat.

I couldn't find a rock solid concept on what fan temps should be, so I figured I'd be comfortable so long as the buggy runs below 210. I'll play around this weekend with it and see how it works. It would be nice to tool around without the fan running most of the time.

As for the $200 laptop, not shockingly the battery is crap. So now I need to find my power inverter if I want to drive around with the laptop. I don't have plans to drive with it offroad, but plan to take on trips if I need to make adjustments and maybe when I tool around the neighborhood.