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Old 06-01-2021, 07:23 PM   #15
simpleisbest
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Originally Posted by mkodama View Post
Trailer balance has definitely been a big thing on my mind. Im leaning towards tires on the car side of the trailer axle, so that there is always weight on the trailer hitch for safety. Tools may vary, fuel jugs get used up, but wheels and tires are a constant.

My track wheels and tires are 44lbs each
the track wheels are about 2 feet from the trailer axle and 4 feet from the hitch
59lbs on the hitch with just wheels on the trailer
0lbs on the hitch with 20 gallons of gas and 50lbs of tool on the opposite side of the axle of the wheels.

Thanks!


I thought I couldnt make that part any more obvious.
Nice! Good to see you are taking that into account!
I'd recommend considering how it balances when unloaded once you get to the track.
One of my past variants was too rear biased when I removed the wheels, so before I unloaded the tires on the front I'd need to use a jack stand on the rear otherwise the front would flip upwards
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Old 06-08-2021, 03:53 AM   #16
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Next step, mounting frame rails.

Im a big fan of T-slotted framing for prototyping structures, especially if Im expecting adjustments after assembly. I had a job at one point making things exclusively out of the Bosch Rexroth branded version of this stuff. The only downside is raw material cost, but i decided it was worth the saved time.

So adapting the BRZ subframe holes, that normally have big M14x1.5 bolts going through, to the 1.5x3.0 profile with slots for 5/16-18 fasteners.

Layout, measure, CAD, laser cut, quick fit check, weld, and final fit check.

Definitely relearned how much stainless likes to warp. I should probably look into better gas coverage, too much color.

Oh, and found out the control arm bolts are also M14x1.5 and fit great in this case for mounting the extrusion-to-subframe adapters, so I ordered more of those from my local parts department. The normal bolts used for mounting are monstrously long.
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Old 06-11-2021, 12:53 AM   #17
mkodama
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And like that, I had something that looked like a trailer!
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Old 06-17-2021, 01:44 AM   #18
mkodama
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I was stricken with an idea, to lock the steering, just use oversized steering rack limiters! So much easier than what I preciously had planned. I also have a template for making 3D printed steering rack limiters now.

Also, new steering rack bellow and instead of the overpriced OEM hose clamps, got stainless single ear clamps from McMaster-Carr for like 1/10th the price. Oetiker 515 or McMaster-Carr 5435K44.
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Old 06-17-2021, 01:49 AM   #19
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OEM nut (normally used on I think the rear suspension strut mounts) and JIS flanged bolts to hold the trailer hitch to the framing.
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Old 06-17-2021, 02:03 AM   #20
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Front mounts for front control arm bushings, made in the typical CAD, laser cut, weld method.
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