Partially Committed Racing #006 turn key buggy build - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 06-25-2019, 11:01 AM   #1 (permalink)
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Partially Committed Racing #006 turn key trail buggy build

Figured it was time to start another build thread – try to get some good old fashioned tech back onto the boards! This will be build #006 and will be built as a full turn key trail buggy.

We finished #004 for Todd about a year ago, and he has been riding it for a while – has it really dialed in and can drive that thing up pretty much anything he points it at. We were really happy with how these chassis have been performing, and its really cool to see them do so well in the rough rocks.

Not sure if I carried a build thread on that buggy here...but its a (slightly bigger) clone of my personal buggy that I did do a build thread on here. In any case here is the completed #004 turn key build:



Just for reference, here is my personal buggy



and here is the other full turn key that was built at the same time as mine - it is very close to the same as mine...just a lighter weight version, pretty much:



Had another guy in our group approach us about a new build that will be a little different than the last 3, but still retain the key design features that (in my opinion) make these buggies work so well. When combined with some proper shock tuning, these chassis wake up even more and our experience with that lead us to make a few slight changes on the suspension on this one – mainly the trailing arm setup in the rear, and the extra 5+” of uptravel both front and rear. Other than that, the suspension geometry is the same as the other 3 and that should play out well. Anyway, on to the build!

Some basic info:

-57” wide chassis, 2” DOM tube with a mix of 1.75” and 1.5” as fillers. Combination of .120 wall and .250 wall in the high impact areas, as well as some 7075 aluminum slugging in the rockers and the trailing arms. Rear radiator setup on this one to shoehorn a massive 35”x19” CBR radiator in there, coolant flowing through the chassis rails.
-14 bolt axles front and rear
-43” SX stickies
-416ci LS powerplant Holley tuned
-TH400
-Atlas 3.0
-2.5” Radflo coilovers
-2.0” Radflo coil carriers, 2.5” Radflo bypasses, 2.0” Radflo air bumps
-room for a family sized cooler

We started laying out tube in a simple jig which was nice to use and let us get things moving along pretty quickly. We ended up with a base chassis in in 2 work days, which was a little faster than before.




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Old 06-25-2019, 11:02 AM   #2 (permalink)
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Things started falling into place pretty quickly after that and parts started showing up. You can get an idea of radiator size compared to the 31x15.5 that is a pretty popular trail buggy size radiator. The 35x19 is more in line with race car sized, but we didnt want to ever have to even consider cooling being an issue on this build.





Built a simple plate style radiator mount, this will be captured and shrouded in from the top as well. Sway bar tube is incorporated into the radiator mount as well and from there, we filled in a majority of the main chassis support tubing.



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Old 06-25-2019, 11:02 AM   #3 (permalink)
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We knew going in that we would be doing the rear of the chassis differently than the previous ones. We did this for 2 reasons… first being the obvious difference of the massive rear radiator taking up some real estate back there, but the 2nd , and probably more important reason being that we wanted to make sure that uptravel was maximized back here to really take advantage of the shock package. Too many folks build buggies and spend all this money on shock packages…and slap them on a setup that looks like they were designed using crayons and old newspaper. We are maximizing smooth travel numbers, keeping shock angles ideal through travel, and will work extensively on the tuning to make sure that this thing reaches full potential. The different rear section adds an additional 6” potential uptravel over the “trail buggy” version on the previous 3 buggies (4 chassis are built with the same design, and this 5th one will be the first using this rear setup.




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Old 06-25-2019, 11:04 AM   #4 (permalink)
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Then we got to the fun part! The biggest difference you will see on this build is the body. The owner wanted something different, and settled on the Fybr Concepts bronco body. They redesigned the normal bronco body and came up with a highline fender setup – we had some discussions with them and got the 2nd set coming out of the mold with the understanding that this was still somewhat of a prototype body and there may be some edits needed. They were needed The doors needed to be completely changed to match the new body lines, and there is no tailgate…but that is OK, we will make our own there. Beyond that…they are nice heavy quality glass that should put up with some decent abuse.

First thing was to get the drivetrain in place to see what we were working with. And then start laying out the front end glass – which turned out to be a lot easier than we thought it was going to be!






Then we moved on and started to lay out the rear to get a feel for what needed to be trimmed up there. Couldn’t help but to see what it would look like…should turn out looking NICE!


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Old 06-25-2019, 11:04 AM   #5 (permalink)
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Another big difference on this one compared to the others will be the exhaust setup – in order to get the most uptravel we possibly could up front combined with driveshaft angles and keeping the suspension geometry ideal through all of that travel, we decided to give ourselves a little extra room and remove the standard drop down and around exhaust setup from the equation. Over and back we go! These are obviously not done yet – There are some edits to the driver side header that we will make (original plan was to use stock style fuel rails, so we had to leave room for the side entry fuel line…but we moved to a flow through rear entry billet style rail, so I will make some changes to the driverside header and it will match the passenger side shaping a bit more) from there they will be cleaned up, TIG welded, jet coated, and then wrapped. Heat shielding will go between the headers and the intake, and the collectors will get V-band clamps on down to a true dual exit out the side/back of the belly like the others.






Moved on to get the back end laid out some more. Got the fuel cell mounted and in place, got the beer cooler rack mounted and in place. Started on the chassis supports back there, and once we get axles we will lay out the suspension on the buggy and get the rest of the supports all tied in with the shock mounts.



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Old 06-25-2019, 11:06 AM   #6 (permalink)
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Then we jumped up to the front end to get the winch mount / sway bar tube laid out. Winch and steering/trans coolers will all be behind the grill like the rest of the buggies – this one will also have the minimalist front bumper look like the others, but will have a small push bar out front to keep the fiberglass all in line as this thing gets beat up and crashed. It looks a little strange at the moment, but its missing all of the rest of the supports and tie ins. It will all flow together when its done. There is a plan! �� You can see where the coolant will come out here as well.





And that gets us up to how it currently sits – we will get started on the interior here next as we wait on axles to be finished and once those get in, we will make this thing a roller! We are pumped to get it on its legs and get into the real fun part of the build.
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Old 06-25-2019, 01:52 PM   #7 (permalink)
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Awesome to see you posting another build!

I’ll offer some unsolicited advice and say that some LSA or C5 manifolds would give you adequate clearance without having to go up and over. They exit no lower than where your motor mounts are located and hug the block pretty tight. C5’s dump closer to the center, while the LSA manifolds exit rearward.

If your motor mounts didn’t come straight off of the chassis tube laterally, and had some sort of arch to them, I’d of kept my mouth shut

Keep up the great work!
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Old 06-25-2019, 02:04 PM   #8 (permalink)
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Originally Posted by scottapher View Post
Awesome to see you posting another build!

Ill offer some unsolicited advice and say that some LSA or C5 manifolds would give you adequate clearance without having to go up and over. They exit no lower than where your motor mounts are located and hug the block pretty tight. C5s dump closer to the center, while the LSA manifolds exit rearward.

If your motor mounts didnt come straight off of the chassis tube laterally, and had some sort of arch to them, Id of kept my mouth shut

Keep up the great work!
I am all for feedback, no need to worry about keeping any mouths shut!

We didnt really NEED to do up and back headers, but when we started laying out the things we wanted...it ended up making sense. We wanted true duals both coming out the same side of the buggy, we wanted to give the driveshaft maximum clearance, and we also just kinda wanted to build some headers

On the last buggy with the 14b front, the driveshaft to exhaust to upper link clearance is really tight, so we wanted to give ourselves a little more wiggle room on this one just for ease of working on things as well as to just have the space. The issue isnt as much the headers themselves as much as it is the tube that wraps around the front of the oil pan. When its all combined together it just gets crowded - but with this chassis having so much extra space in the dash/console area there will be no issues with space done like this.

Thanks for the feedback!
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Old 06-25-2019, 02:34 PM   #9 (permalink)
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Got it.

Id like to build some headers at some point as well...looks like fun!
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Old 06-25-2019, 03:47 PM   #10 (permalink)
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Got it.

Id like to build some headers at some point as well...looks like fun!
its definitely something that takes a little time to figure out, but once you build the first few sections of exhaust, it starts to make sense and is actually pretty fun.

I have grown to enjoy exhaust building, even with no fancy exhaust building tools...these headers were built with an angle grinder, a degree finder, a protractor, and a marker
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Old 06-25-2019, 05:13 PM   #11 (permalink)
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have loved your builds. I'll keep an eye on this one too. hopefully see ya on the trails sometime as well!!!
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Old 06-26-2019, 06:11 AM   #12 (permalink)
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have loved your builds. I'll keep an eye on this one too. hopefully see ya on the trails sometime as well!!!
thanks!

and definitely let me know if you ever make it down this way...we are pretty much always up for an AOP / Harlan / Windrock trip
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Old 06-26-2019, 02:23 PM   #13 (permalink)
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nice start. thanks for sharing your build here.
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Old 06-26-2019, 05:51 PM   #14 (permalink)
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thanks!

and definitely let me know if you ever make it down this way...we are pretty much always up for an AOP / Harlan / Windrock trip
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Old 06-28-2019, 10:58 AM   #15 (permalink)
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Looks good as always! Looking forward to watching the build.
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Old 06-28-2019, 11:53 AM   #16 (permalink)
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Thanks for posting up, I'll be following along!
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Old 08-12-2019, 10:05 AM   #17 (permalink)
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any updates on this?
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