Lowering IRS suspension

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Lowering IRS suspension

Postby vwlimoguy » Fri Jan 14, 2011 7:12 pm

Does anybody have a rough estimate about how much in inches changing the splines or degree affects ride height. For example, the stock setting for the spring plate is 21°5' from the frame tube. How much in inches is it lowered if I change it 3°? Also, how much will the camber be affected at a lowered height of say 2"? 3"? I'm trying to avoid lots of measuring and math and definitely don't want to go the trial and error route.
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Re: Lowering IRS suspension

Postby Mason » Fri Jan 14, 2011 9:16 pm

Came across this thought it might help. http://www.glenn-ring.com/tech/low.html
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Re: Lowering IRS suspension

Postby gimpy60 » Sat Jan 15, 2011 6:46 am

Be sure to level the pan both ways. Get a cheap angle finder @ h-f or steve's. What are you workin on now? JP
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Re: Lowering IRS suspension

Postby vwlimoguy » Sat Jan 15, 2011 9:25 am

Thanks Mason. That's exactly what I was looking for. Still working on that Super Beetle JP. I have the pan completely stripped down and coated in POR 15. I might get the rear suspension started back together today.
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Re: Lowering IRS suspension

Postby gimpy60 » Sun Jan 16, 2011 6:41 am

If your lowering, there won't be much preload on the plates. Keep your fingers outta the way, we already have a 9 fingers. :lol: New rubbers I hope. I guess everyone is in hibernation, sure quiet on here. later.....JP
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Re: Lowering IRS suspension

Postby vwlimoguy » Mon Jan 17, 2011 9:13 pm

Jim goes to the desert and everyone goes silent. I'll be using the polyurethane blend, but its always good advice to use new rubbers ;)
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Re: Lowering IRS suspension

Postby vdubjim » Tue Jan 18, 2011 10:24 am

yep it does! :)

are you wanting to drop it alot? the IMPORTANT thing is what size tires are you trying to put on the rear?

If you drop it alot and dont like the camber, you can flip the arms side to side and cutoff the shock mounts and re-weld them on the correct 'side' and it will make them wheels straight again.
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Re: Lowering IRS suspension

Postby vwlimoguy » Wed Jan 19, 2011 8:06 pm

I'm not sure how much I want to drop it yet. I'll be running 225/50/16 tires on 7" wide rims for the rear. I obviously don't want to prematurely wear out the tires. I'm thinking that I'll only drop it 1" to 2". Kind of depends on how it looks after I drop the front about 3".
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Re: Lowering IRS suspension

Postby gimpy60 » Thu Jan 20, 2011 6:46 am

Did I see an underlying message about the rubbers, huh? Poly will stiffen the ride, but not enough to be noticeable I don't think. Three in the front will just give ya a slight rake 'cause the supers sit high in front anyhow. Keep us updated. yur rite, it is quiet in here, isn't it?...........JP
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Re: Lowering IRS suspension

Postby vwlimoguy » Thu Jan 20, 2011 10:39 am

You might have seen something about the rubbers. I do know that you need to use copious amounts of lube with the poly or she'll groan everytime you hit a bump. :o
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Re: Lowering IRS suspension

Postby vdubjim » Thu Jan 20, 2011 12:03 pm

Must have a good offset then with 16s and 7"?

just do one spline, im sure your rear is saggy anyways and will be running lowpro tires.
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