How to lower 911sc????

[PWICK911]

What is the best way to lower 911sc?

I assume adjust torsion bars?


What else do I need to do to ensure tyres don't rub on arches?

It's not a track car, it is purely for looks.

Thanks

[Trackrash]

The best way would be to take it to an expert on air cooled 911s and have it lowered, corner balanced and aligned.

[mickey356]

If you don't have the tools and a lift its a PITA. You will spend hours and hours back and forth...up and down...and you most definitely will need an alignment when done. I did my SC with the help of a VERY knowledgable pelican and it took ALL DAY and part of another. It was worth it because the car looked fantastic properly set. Take the advice given above and find someone who can do it, corner balance it and align it. You may want to save money but trust me, if you don't know what you're doing you'll end up spending money anyway.

[patz]

The front is easy. The rear not so.

I replaced the rear bushings AND the swing arms with adjustable ones. Doable DIY. But you will need an alignment.

If you have the coin, let a shop do it.

[tirwin]

Lowering the rear is a bit of a pain. You have to re-index the torsion bars. It's not a super complicated process but it is a lot of labor.

The front is a different story. Easy (easier) to lower, but there are consequences. What happens is you affect the geometry of the control arms and the tie rods. This has been discussed a million times. You should read up before proceeding so you understand the implications. The short version is lowering increases bump steer. There are ways around this -- spacers or adjustable tie rod ends but proper solutions can get spendy. I did this and it involved raising the spindle height and adjustable tie rod ends plus rolling the fenders (I also have 21mm spacers up front).

If looks is the only reason you want to do this, then I advise you strongly rethink how much money you want to throw at looks.

[PWICK911]

Thanks for the advice which I will take on board

As the above have said needs set up after or it will handle like A dog.

Shocks and bushes already done
I know there is adjustment in the standard swing arms which should be ok for a 20mm drop. Unless anyone knows otherwise.
I'm running 17's

[Bob Kontak]

Originally Posted by PWICK911

I know there is adjustment in the standard swing arms which should be ok for a 20mm drop. Unless anyone knows otherwise.

Scott Spence, the guy on the cover of Bruce Anderson's first edition Porsche 911 Handbook barked at me for suggesting this. I have told this story before.

He was adamant about torsion bar indexing only for street use when lowering. Said arm adjustments were for track adjustments, not routine daily drivers.

I only know what he said. I got nothing else except I did replace the bushings and index the bars. Then he aligned.

[Trackrash]

Originally Posted by Bob Kontak

Scott Spence, the guy on the cover of Bruce Anderson's first edition Porsche 911 Handbook barked at me for suggesting this. I have told this story before.

He was adamant about torsion bar indexing only for street use when lowering. Said arm adjustments were for track adjustments, not routine daily drivers.

I only know what he said. I got nothing else except I did replace the bushings and index the bars. Then he aligned.

I would like to hear the reasoning behind that statement.

[Bob Kontak]

Originally Posted by Trackrash

I would like to hear the reasoning behind that statement.

I honestly do not know.

That is simply what the man said and I am certain of what he said.

I am not defending his statement but given his station, I am not disregarding what he said. I just don't know.

OP asked for input. That's all I had.

The street Porsche is not a race car. The obvious question is why did they make the arms adjustable then?

[HarryD]

Some reading to help you figure the way forward: Lowering the Porsche 911 | 911 (1965-89) - 930 Turbo (1975-89) | Pelican Parts DIY Maintenance Article