onetoncrawler
Well-Known Member
First off I want to give a shout out to everyone that made this build possible. It was kind of a bucket list item for me and thanks to my wife and good friends it's now a reality. Mark, Mo, Ben & Jimmy all put in a lot of late hours and weekend hours to make it happen. I can't thank those guys enough. Huge thanks to my wife for being patient as the last couple of months have been a mad dash to try and wrap this thing up. First race was last weekend, so we were cutting it close!
After dabbling in ECORS and WeRock we decided to try and build an Ultra 4 race car. Jimmy Penner had a few ideas he wanted to try out so I agreed and we started finalizing a cad drawn sub frame design that he had been working on. Thanks to Jamie, we got the cad files sorted out about this time last year.
We sent all of the files out to be laser cut then Jimmy started tig welding.
EOR hooked us up with a pile of tubing so Mark and I got started bending. Jimmy, Mo and I shared bendtech pics and files for several days before I settled on a design for the chassis.
My buddy Craig tig welded up the trailing arms
After everything was mocked up it went back to EOR for interior and skins.
Then EOR built the killer drive shafts. EOR is known for their standard DIY driveshaft kits. We went with a similar setup to the off the shelf kit for the front. For the rear Jimmy decided to go a little stronger. He used a chromoly trophy truck slip. He tig welded both front and rear for strength. Give EOR a shout for all your driveshaft needs. They have slips, yokes and joints on the shelf.
Went with all Holley fuel delivery – dual pumps to eliminate a common single point failure. Also trying out the new Holley Hydromat. So far it seems to work great
Off to Wicked Coating in Clanton, AL for powder coating. Then re-assembly began. The Artec fuel cell mount saved a lot of time over building one from scratch and looks awesome.
Once it was a roller again eXtreme Roc Rigs (XRR) started working their magic with the wiring. Ben drew up a full schematic and started planning the wiring harness. He used all mil spec wire & IP67 automotive connectors. We went with sealed switches with built in circuit breakers to make the wiring as simple as possible. With an U4 car there are a lot of extras such as the radio, fresh air pumper, brake lights, etc. XRR done an excellent job with the wiring and kept it super clean. XRR has wire, connectors, battery cable, shrink tubing, etc. all in stock. Hit them up for your next wiring job.
Artec Industries came through for us on the high steer arms, ram mount & fuel cell mount. All their stuff is top notch and fit great.
Some steps Mo whipped up
Off to Culver Auto Specialties for tuning. I can't say enough about Lane, he went out of his way to work with us and meet our deadlines. He stayed up late helping me troubleshoot an easy fix.
Going through tech inspection at the Ultra 4 race in Hot Springs
Few specs for anyone interested.
• Chassis
o EOR Cad designed laser cut subframe incorporating link mounts crossmembers and skid
o Bendtech designed chassis DOM/Chromoly mixture
o 3/8" aluminum full skid
• Front Axle
o Ruffstuff 9" fabricated housing
o Strange Hi-9 3rd member with dual load bolts, spool 5.38 gears
o RCV axles
o Reid inner C's and outer knuckles
? Reid bronze kingpin bushings
? Crane Kingpin spring eliminator kit
? Stage 8 locking spindle nuts
o Artec High Steer Arms, Artec Ram mount
o Yukon hardcore hubs
o EBC Chevy ½ ton drilled/slotted rotors and pads
o NWF drive flanges
• Rear Axle
o Ruffstuff 9" fabbed housing
o Gearworks TT 10" third member, spool
o RCV 300m shafts
o 14 bolt spindles
o Ballistic fab aluminum 14 bolt hubs with keyed drive flanges
o EBC Chevy ½ ton drilled/slotted rotors and pads
• Engine
o ATK Racing Engines Chevy 383
o Splayed 6 bolt mains
o Canton 11 QT offshore oil pan
o 100% Forged rotating assembly
o 11.5/1 compression
o Brodix ported heads
o Roller cam/roller rocker combo
o Sanderson ceramic coated shorty headers
o Holley EFI system tuned by Culver Auto Specialties
o Holley dual fuel pump with hydromat pickup, fuel shut off valves
• Transmission
o DBR built TH400
o PRC cooler with dual Spal fans
• Transfer Case
o Atlas 2.0 with 300m gears from the famous 555 racing Unicorn!
o EOR HD driveshafts front and rear
• Suspension
o 4 link rear with Fabricated rear trailing arms, FK 1.25" heims
? 4 tube Bilstein Bypass shocks, Bilstein coilovers w/ pac racing springs
o 4 link front with 7075 Aluminum links, FK 1.25" heims
? Bilstn triple bypass shocks and coilovers & 4" bumps
• Steering
o PSC P-pump with PSC Remote reservoir and 12.1 steering valve, Howe TT inline cooler, trailgear double ended ram
o Longacre steering wheel with splined double safety clip quick disconnect
• Miscellaneous
o PRP Podium seats and 5.3 ratcheting harnesses
o Raceline TR232 wheels
o BFG KR2-S tires
o Rugged radios 357 intercom
o Rugged radios dual fresh air pumper kit
o Aluminum shifter
o Autometer ultra-lite gauges
o Odyssey PC-1500-DT Battery with Ruffstuff mount
o Jaz 22 gal fuel cell with Artec mount
o PRC 31X19 radiator with -16 AN fittings and dual 14" Spal fans
o Wilwood dual ¾" master cylinders with Wilwood pedal
o Kartek siren
o Jamar Aluminum throttle pedal
o Aluminum interior with Custom Tint & Offroad bedliner
o Mastercraft window nets
o Warn VR-8000 winch
o Screen Printing Lodge Custom wrap
After dabbling in ECORS and WeRock we decided to try and build an Ultra 4 race car. Jimmy Penner had a few ideas he wanted to try out so I agreed and we started finalizing a cad drawn sub frame design that he had been working on. Thanks to Jamie, we got the cad files sorted out about this time last year.
We sent all of the files out to be laser cut then Jimmy started tig welding.
EOR hooked us up with a pile of tubing so Mark and I got started bending. Jimmy, Mo and I shared bendtech pics and files for several days before I settled on a design for the chassis.
My buddy Craig tig welded up the trailing arms
After everything was mocked up it went back to EOR for interior and skins.
Then EOR built the killer drive shafts. EOR is known for their standard DIY driveshaft kits. We went with a similar setup to the off the shelf kit for the front. For the rear Jimmy decided to go a little stronger. He used a chromoly trophy truck slip. He tig welded both front and rear for strength. Give EOR a shout for all your driveshaft needs. They have slips, yokes and joints on the shelf.
Went with all Holley fuel delivery – dual pumps to eliminate a common single point failure. Also trying out the new Holley Hydromat. So far it seems to work great
Off to Wicked Coating in Clanton, AL for powder coating. Then re-assembly began. The Artec fuel cell mount saved a lot of time over building one from scratch and looks awesome.
Once it was a roller again eXtreme Roc Rigs (XRR) started working their magic with the wiring. Ben drew up a full schematic and started planning the wiring harness. He used all mil spec wire & IP67 automotive connectors. We went with sealed switches with built in circuit breakers to make the wiring as simple as possible. With an U4 car there are a lot of extras such as the radio, fresh air pumper, brake lights, etc. XRR done an excellent job with the wiring and kept it super clean. XRR has wire, connectors, battery cable, shrink tubing, etc. all in stock. Hit them up for your next wiring job.
Artec Industries came through for us on the high steer arms, ram mount & fuel cell mount. All their stuff is top notch and fit great.
Some steps Mo whipped up
Off to Culver Auto Specialties for tuning. I can't say enough about Lane, he went out of his way to work with us and meet our deadlines. He stayed up late helping me troubleshoot an easy fix.
Going through tech inspection at the Ultra 4 race in Hot Springs
Few specs for anyone interested.
• Chassis
o EOR Cad designed laser cut subframe incorporating link mounts crossmembers and skid
o Bendtech designed chassis DOM/Chromoly mixture
o 3/8" aluminum full skid
• Front Axle
o Ruffstuff 9" fabricated housing
o Strange Hi-9 3rd member with dual load bolts, spool 5.38 gears
o RCV axles
o Reid inner C's and outer knuckles
? Reid bronze kingpin bushings
? Crane Kingpin spring eliminator kit
? Stage 8 locking spindle nuts
o Artec High Steer Arms, Artec Ram mount
o Yukon hardcore hubs
o EBC Chevy ½ ton drilled/slotted rotors and pads
o NWF drive flanges
• Rear Axle
o Ruffstuff 9" fabbed housing
o Gearworks TT 10" third member, spool
o RCV 300m shafts
o 14 bolt spindles
o Ballistic fab aluminum 14 bolt hubs with keyed drive flanges
o EBC Chevy ½ ton drilled/slotted rotors and pads
• Engine
o ATK Racing Engines Chevy 383
o Splayed 6 bolt mains
o Canton 11 QT offshore oil pan
o 100% Forged rotating assembly
o 11.5/1 compression
o Brodix ported heads
o Roller cam/roller rocker combo
o Sanderson ceramic coated shorty headers
o Holley EFI system tuned by Culver Auto Specialties
o Holley dual fuel pump with hydromat pickup, fuel shut off valves
• Transmission
o DBR built TH400
o PRC cooler with dual Spal fans
• Transfer Case
o Atlas 2.0 with 300m gears from the famous 555 racing Unicorn!
o EOR HD driveshafts front and rear
• Suspension
o 4 link rear with Fabricated rear trailing arms, FK 1.25" heims
? 4 tube Bilstein Bypass shocks, Bilstein coilovers w/ pac racing springs
o 4 link front with 7075 Aluminum links, FK 1.25" heims
? Bilstn triple bypass shocks and coilovers & 4" bumps
• Steering
o PSC P-pump with PSC Remote reservoir and 12.1 steering valve, Howe TT inline cooler, trailgear double ended ram
o Longacre steering wheel with splined double safety clip quick disconnect
• Miscellaneous
o PRP Podium seats and 5.3 ratcheting harnesses
o Raceline TR232 wheels
o BFG KR2-S tires
o Rugged radios 357 intercom
o Rugged radios dual fresh air pumper kit
o Aluminum shifter
o Autometer ultra-lite gauges
o Odyssey PC-1500-DT Battery with Ruffstuff mount
o Jaz 22 gal fuel cell with Artec mount
o PRC 31X19 radiator with -16 AN fittings and dual 14" Spal fans
o Wilwood dual ¾" master cylinders with Wilwood pedal
o Kartek siren
o Jamar Aluminum throttle pedal
o Aluminum interior with Custom Tint & Offroad bedliner
o Mastercraft window nets
o Warn VR-8000 winch
o Screen Printing Lodge Custom wrap