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IFS for the future?

 
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hotrodmatt
Just Idling



Joined: 29 Sep 2020
Posts: 158
Location: Liverpool, Sydney

Posted: Tue Jul 06, 2020 3:40 pm    Post subject: IFS for the future?

Anybody here with strong IFS knowledge?

Saw this on a yank site it could be the way to go for me to bring the front end forward and provide something other than the torsion bar front suspension I'll be using when I finally get the car finished.

It'll be a number of years before I even consider this (lengthening wheelbase usually means ICV - yuk) but I want to start thinking about it now.

I guess for now I just want to know if there are any obvious problems with this setup?

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gregwapling
Site Admin


Joined: 10 Jun 2021
Posts: 413
Location: Melbourne, Australia

Posted: Wed Jul 07, 2020 10:13 am    Post subject:

Let me start this by saying I don't claim to be an expert.
But.
1. Those hubs worry me, they give an extra lot of offset to the track and their not studs but bolts, probably require a certain type of wheel.
2. the diameter of the tube for the arms seems a bit on the skinny side, they'd want to be pretty thick wall, but looking at the adjusters, it doesn't look like it.
3. What's all those extra tubular bars for? I can only assume mounting the rack, which isn't shown
4. Lastly, how does it mount to a chassis? No real indication at all so hard to comment.

So what's it out of or what is it mean't to fit?
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Greg Wapling
The years have been kind to me, it's just the weekends that have done the damage.
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hotrodmatt
Just Idling



Joined: 29 Sep 2020
Posts: 158
Location: Liverpool, Sydney

Posted: Wed Jul 07, 2020 11:13 am    Post subject:

Thanks Greg, I'm just starting to think about options particularly for moving the front wheels forward from the rest of the chassis but a better steering set up would be good for cosmetics...

Quote:
1. Those hubs worry me, they give an extra lot of offset to the track and their not studs but bolts, probably require a certain type of wheel.

The track is actually considerably narrower than stock. The rotors are stock too - though I would change to a contemporary (say Commonbore) rotor with studs.

Quote:
2. the diameter of the tube for the arms seems a bit on the skinny side, they'd want to be pretty thick wall, but looking at the adjusters, it doesn't look like it.

Yeah that's what I thought too - they don't look very strong.

Quote:
3. What's all those extra tubular bars for? I can only assume mounting the rack, which isn't shown

The bars in the middle are for mounting to the chassis frame head they are duplicated because the set up pictured "pushes" the suspension about 5-8" inches forward.

Quote:
4. Lastly, how does it mount to a chassis? No real indication at all so hard to comment.
So what's it out of or what is it mean't to fit?

The pair of tubes at the back are bolted to the frame head of the chassis (VW) where the stock torsion bars usually mount. Simple four bolt attachment.

I think that in the end I will stay with VW's torsion bar front but narrow it so that the shock towers will be up against the body. It would be really good to have something a bit better looking poking out from the car and further towards the front of the bodywork tho.... :S
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Drewfus
Rookie


Joined: 14 Jun 2021
Posts: 48
Location: Newcastle, Australia

Posted: Wed Jul 07, 2020 12:04 pm    Post subject:

Which version(yearmodel) of bug are you adapting front ends to?
The torsion bar units or the ‘strut’ type?

As for the proposed unit, no thanks, the ‘scrub radius’ looks terrible, as does the remaining component geometry. If you genuinely wanted to go down this path then I’d be purchasing a complete ‘rod city’ or similar setup, with a custom cross member which was made to suit the appropriate track width etc, which also incorporated a ‘spacer’ where it is bolted to the original floorpan.

Other than adapt the disc brake front end to the original torsion bar setup (which I personally believe is a great setup), if you wanted the ‘coilover’ look, you can incorporate a pair, replacing the original shock unit, and selecting appropriate springs for the coilover and to replace the original torsion leaves……

If your main issue is to create a longer wheelbase (depending on how much….are you thinking 2” or 10”?) you could weld a piece of RHS(with a crush tube fitted where the 4 bolts go through) to the original F/end to act as a spacer. Again, this would depend on how much you want to bring the front end forward. Not technically legal, but I wont tell….

My choice would be the ‘R/C’ version for a few simple reasons
*good availability of replacement parts
*Engineers are familiar with the ‘proven/established’ setup, and would probably be more ‘relaxed’ about the proposal
* you could incorporate a rack’n’pinion unit, getting rid of that ‘flogged out’ steering box.
* Attractive and functional.

Will email you some pics since you know how to post photo's and I don't....

Cheers,

Drewfus
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FRANK BASILE
500RPM



Joined: 07 May 2021
Posts: 598
Location: MELBOURNE

Posted: Wed Jul 07, 2020 12:13 pm    Post subject:

Greg,looking at the wheel bolts,they appear to have tapers for conventional steel rims,I recall this format used, on VW? or similar,I am intrigued also by the offset of the hubs,and also by the length of the arms,when you look proportionatly to the crossmember.............Frank
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bcal
700RPM



Joined: 04 Feb 2021
Posts: 722
Location: The Shire, Sydney

Posted: Wed Jul 07, 2020 6:50 pm    Post subject:

I agree with the above sentiments and would like to also point out the tie rod being employed as the upper ball joint. You see this a lot with yanky stuff.
If your doing a rat dub why not concider the early poojoe transverse leaf front end.
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Bye for now..........
Brett.
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hotrodmatt
Just Idling



Joined: 29 Sep 2020
Posts: 158
Location: Liverpool, Sydney

Posted: Wed Jul 07, 2020 8:11 pm    Post subject:

I think I've decided to stick with Herr Porsche's design but narrow the beam so the shock towers are tucked in nice and close to the body. If I do extend I think I'll just cut the frame head off and extend the chassis tunnel.
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Drewfus
Rookie


Joined: 14 Jun 2021
Posts: 48
Location: Newcastle, Australia

Posted: Fri Jul 09, 2020 3:58 pm    Post subject:

Needed an excuse to try this photobucket connection thing....



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