Building a class 5 unlimited (prerunner) questions

[Brad henrikson]

I'm building a class 5 from the ground up I've got a 64 body 6 over front beam 3x3 rear arms ect. My question is what length should I cut the rear torsion housing to? What length should I weld the rear arm pivots at? Any help would be great I'm going to be using rear coil overs

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[Brad henrikson]

Also if anyone has any pics of the floor portion of there chassis set up just looking for a good place to start. Thanks

[dustymojave]

I see you have a decent chassis table and a new bender. Your fabrication skills just may be quite capable.

But considering the frame and chassis design questions you're asking, I suggest you look into buying a Crumco chassis.

(661) 264-1327 and look them up on Facebook.

My son driving a car in the Mint 400 that he helped build when he worked at Crumco.

Look at their product and check their very good prices. But don't call asking them how to build it yourself. That would be rude. Either buy their product or don't. Know that its race and play proven in quality materials at a price competitive with many less complete CREW play buggy frames. They even include fitting it into your body shell in their price.

The beam you have may be fine.

But the remains of the front clip is horrendous with so many things just wrong it's not even worth starting to list them.
_________________
Richard
Offroading VW based cars since 1965
Tech Inspection 1963 - 2012 SCCA/SCORE/HDRA/MORE/MDR +
Retired from building Bajas, Fiberglass Buggies and Rails in the Mojave Desert. Also Sprints & Midgets, Dry Lakes, Road Race cars. All types New and Vintage
SoCalBajas Member
Kicked Cancer's A$$...1st and 2nd round...Fight ain't over yet.

[Brad henrikson]

Thanks for the info on buying a chassis but I've already got the bom and look forward to building it myself. The excess tube on the front beam came with it I did not do that work. I'm a full time welder so I'm not to worried about the fab work. I just need some measurement to get started

[Brad henrikson]

Maybe someone can answer this question do I want the same rear width as front?

[Iguana]

Good luck with the Build, always more fun to build and buy.

I am running 11 deg box's at a 48" rear torsion with Coil Overs and custom 3x3 arms. If you are using stock VW style then you will want 15 deg but you will also want a shorter housing if you are keeping your pivot angle in line to reduce binding.

The Pivot folds you have will be made for 15 degree and make sure when you put them on your don't clock them as it is all proportional.

The style of spring plate eliminators you have are not correct so you will get binding but it is minimal

My fronts are always 1/2" wider than my rear for tracking purposes.

Being able to weld is half the battle, being able to understand what you are doing is the other. Take your time, understand what you are looking to do and measure lots.

When I set up the bare tubes like what you have there I run 0 degree camber at ride height and clock the box's 2 deg down.

I make my own Pivot Box's as I want a different angle to most

You also need to work out what you are doing for rear arms as that will effect a lot of the geometry, I am using custom ones as I didn't care to much for the off the shelf options.

[Brad henrikson]

Thank you for your help I'll keep up to date with progress

[Iguana]

[KrAzY-BaJa]

you are starting from nothing and no torsions. i would suggest to start by not using the original style pivots. run the dual parallel arms and never have to worry about the arch of the arms. also easy to make.
then go with micro stubs

just a random link to first pic i can find
http://www.4x4brasil.com.br/forum/gaiola-baja-e-bu...ink-2.html
_________________
70% of what you buy is something to start with.
ForYotaWagen: A Ford/Toyota/Volkswagen http://www.thesamba.com/vw/forum/viewtopic.php?p=4871576&highlight=#4871576

[Iguana]

Just keep in mind with Zero Pivots you will get Zero camber change through out travel so it will drive worse on the road and have a tenancy to edge out.

If you have no limits I would go with at least 6 or 7.

Zero is fine in offroad race cars but I would never do it in a dual sport

[dustymojave]

[KrAzY-BaJa]

i know your cornering but you set your camber in the arm then it never changes..
with regular stock mounts is so magnified with bigger arms
if your height is to high its \ /
and to low your / \
_________________
70% of what you buy is something to start with.
ForYotaWagen: A Ford/Toyota/Volkswagen http://www.thesamba.com/vw/forum/viewtopic.php?p=4871576&highlight=#4871576

[Iguana]

[KrAzY-BaJa]