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-   -   Race truck! (https://www.pirate4x4.com/forum/showthread.php?t=2681416)

pitbullcruiser 04-27-2019 07:18 PM

Race truck!
 
I am currently building a 4600 class Toyota truck for KOH 2020. I came back from the 2019 KOH, parted out my truggy, bought a Toyota truck and started building.
Specs-
Toyota truck
22r on GotPropane
W56 transmission
Marlin ultimate dual transfer cases
OEM Toyota front axle housing
4.88 gears Detroit locker
OEM Toyota rear axle housing
4.88 gears spool
TrailGear leaf springs front/ rear
Fox 2.5s with reservoir
35 DOT Krawlers
15 DIY bead locks

Old build thread.
https://www.pirate4x4.com/forum/toyo...ta-truggy.html

Truggy last ride and disassembly.
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pitbullcruiser 04-27-2019 07:21 PM

The Race Truck!
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pitbullcruiser 04-27-2019 07:50 PM

Laying out some measurements for the cage. Measure, cut, notch and weld up some 1 3/4 .120 wall DOM for the main structure. 1 1/2 .120 wall DOM for the bumpers.
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Provience 04-27-2019 07:58 PM

:eek: :eek: hells yeah :smokin:

save weight at every possible chance you get, looking forward to seeing this get built up. air bumps are now class legal :grinpimp:

pitbullcruiser 04-27-2019 08:22 PM

Yea man, I got some air bumps! Trying to keep this as simple and light as possible. A reliable trail rig with racing stuff.

Toyota axles with all the normal weld on stuff. Diff stud eliminator, fox 2.5 12 and 10. Freshly rebuilt 4.88 diffs along with my old Detroit locker thats all blown up.
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Provience 04-27-2019 08:42 PM

what is the plan for the rear bumper? It looks big, like slap that ass and hold on for the ride big. Are you not concerned about horrible drop off angle?

rockyota83 04-27-2019 09:16 PM

why 4.88s instead of 5.29s?

pitbullcruiser 04-27-2019 09:20 PM

Quote:

Originally Posted by Provience (Post 44419950)
what is the plan for the rear bumper? It looks big, like slap that ass and hold on for the ride big. Are you not concerned about horrible drop off angle?

LOL, I made the bumper stick out so far because the bed was bobbed. I am trying to make it the same length as it would normally be so I hopefully wont have any issues with tech inspection.
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pitbullcruiser 04-27-2019 09:46 PM

Quote:

Originally Posted by rockyota83 (Post 44419980)
why 4.88s instead of 5.29s?

I had 3 diffs with 4.88s already, one was new. I might swap them out for some 5.29 down the road.

YotaAtieToo 04-27-2019 11:16 PM

Gear it so you can run in 2.28

Aisin 04-28-2019 06:19 AM

That front axle gusset you welded on will result in a bent housing. Id fix it before you wheel it.

pitbullcruiser 04-28-2019 10:41 AM

Quote:

Originally Posted by YotaAtieToo (Post 44420050)
Gear it so you can run in 2.28

My crawl box is 2.28.

Provience 04-28-2019 10:51 AM

Quote:

Originally Posted by pitbullcruiser (Post 44420366)
My crawl box is 2.28.

i think that was his point :flipoff2:

How fast can your suspension keep up running in the desert/sand?

gear it so that you can hit that speed redline 4th gear with the crawl box in low range

YotaAtieToo 04-28-2019 11:01 AM

Quote:

Originally Posted by Aisin (Post 44420138)
That front axle gusset you welded on will result in a bent housing. Id fix it before you wheel it.

Racing with stock housings is a waste of time anyway.

SLOWPOKE693 04-28-2019 11:22 AM

No tubing bender? I noticed every bar in your cage is straight and sort of Lincoln logged together. Never seen a cage built like that before.... Any worries about passing tech?

pitbullcruiser 04-28-2019 11:53 AM

Quote:

Originally Posted by SLOWPOKE693 (Post 44420412)
No tubing bender? I noticed every bar in your cage is straight and sort of Lincoln logged together. Never seen a cage built like that before.... Any worries about passing tech?

I designed it based on a couple of current cars running in 4600 and 4500 classes.

rockyota83 04-28-2019 12:06 PM

Quote:

Originally Posted by SLOWPOKE693 (Post 44420412)
No tubing bender? I noticed every bar in your cage is straight and sort of Lincoln logged together. Never seen a cage built like that before.... Any worries about passing tech?

i see lots of trophy truck chassis with only one or two bends throughout the whole chassis, typically the A and B pillars

SLOWPOKE693 04-28-2019 12:38 PM

Quote:

Originally Posted by rockyota83 (Post 44420478)
i see lots of trophy truck chassis with only one or two bends throughout the whole chassis, typically the A and B pillars

So have I. JHF buggys and the Goatbuilt buggys as an example, only have one or two bends in the chassis. Never saw a chassis built with zero bends though...

Provience 04-28-2019 01:54 PM

Quote:

Originally Posted by SLOWPOKE693 (Post 44420500)
So have I. JHF buggys and the Goatbuilt buggys as an example, only have one or two bends in the chassis. Never saw a chassis built with zero bends though...

i did my cab cage like that on my pickup, rolled it over a few times (yeah all low speed) and never had any issues with it.

Nodes are effective as long as they are braced and welded properly, no reason it would fail tech. straight tubes are, in a marginal sense, stronger than bent tubes.

consider that whenever you bend a tube you are changing the dimensional shape of it, either by smooshing the cross section or by thinning out the walls.

pitbullcruiser 04-28-2019 04:29 PM

Junk in the trunk.
Done-
Spare tire mount
Propane tank
Battery box
Spare coolant
Floor jack
Triangle reflector
Breaker bar with extension
Ammo can for tools
Number plates
Rear lights

Need to do-
Ammo can for spare parts
2 Fire extinguishers
Fresh air pumper
Antenna mount and a few other things.
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Black Sheep 04-28-2019 04:57 PM

Looks like a lot of the inner fenders and core support was cut out, how do you plan on justifying that against the rules?

Quote:

Front inner fenders must be complete and unmodified, with the following limitations
and exceptions: outer fenders (wheel well openings) may be trimmed for the single
and exclusive purpose of allowing for tire clearance.

pitbullcruiser 04-28-2019 05:41 PM

Quote:

Originally Posted by Black Sheep (Post 44420736)
Looks like a lot of the inner fenders and core support was cut out, how do you plan on justifying that against the rules?

The inner fenders are still there. Core support did get a little trim, dont worry about that little guy
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KH85 04-28-2019 06:10 PM

Quote:

Originally Posted by YotaAtieToo (Post 44420396)
Racing with stock housings is a waste of time anyway.

This would concern me as well.

rockyota83 04-28-2019 08:41 PM

stock housing works fine if you truss it from steering stop to steering stop, he almost did :laughing:

i beat my stock trussed housing like it owed me money, stole my girl, called me a jeep fanboy, and it held up just fine :grinpimp:

keeping chromo birfs alive is the problem once you properly build the rest of the axle

pitbullcruiser 04-28-2019 09:20 PM

Ok, so move the front truss out to the steering stops. Start saving up my pennies for an aftermarket Toyota housing before KOH and look into swapping my 4.88s for 5.29s. :flipoff2:


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