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YOUR RESEARCHNewbie asking a spacer question
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It may be possible to use a 15 mm bolt-on spacer in the rear, but I can't say for sure as we aren't recommending changes like that.
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I live in Europe, my friends have some GT3 Mk1 and Mk2 and the best expert in these cars (who knows every detail about GT3 for track setting told me what you said is not correct)
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Suggestion
It may be possible to use a 15 mm bolt-on spacer in the rear, but I can't say for sure as we aren't recommending changes like that.
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I live in Europe, my friends have some GT3 Mk1 and Mk2 and the best expert in these cars (who knows every detail about GT3 for track setting told me what you said is not correct)
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Im new with sports cars, might be a bit dum question but I will ask anyway...
Are spacers just for looks or will they improve stability and cornering? If so, why arent they installed in the factory? Porsche offers several different widths. Which one would fit my car best? I have a 1999 Carrera 2 with original suspension and original 18'' TurboTwist rims. What are the pros and cons of spacers?
The downside of spacers is that they increase the loading on the wheel bearings quite a bit and they can cause fitment problems. They also make the wheel a REAL pain to install and require longer bolts. On the plus side a wider track can improve handling but are unlikely to make a noticeable difference unless used in conjunction with other adjustments such as camber, bars, springs etc. To improve your handling best to start with an alignment for which this forum has a ton of information.
Correct or to allow non spec offsets of after market wheels to fit correctly.
Some put 5mm spacers on so their OEM wheels stick out from the wheel well.
I also have a 99, but a C2. I found the stock wheels 18 turbos too far inside the wheel well for my taste. I prefer the outside edge of the wheel to be even with the inside edge of the top of the fender both front and rear. I went with 15mm H&R to acheive this and it is perfect. I hate when the tires stick out past the fenders - terrible look. You will need longer - studs and H&R has them also
Any improvement on handling, they are aesthetical only.
One of my friends is a expert on Porsche engineering and advise me not to mount them in front train , as it would be a bit lazy.
5 mm rear and that's all
Porsche Mk1 gt3 (Euro) came with 5mm spacer up front... from the factory.
It is common practice by raceteams to put spacers (front and rear) to promote/cancel over/understeer depending on track configurations.
I don't where you'd find this information.
The 996 GT3 mk1 never came with 5 mm spacers
You can add whatever you want but the car has no spacers from the factory. I live in Europe, my friends have some GT3 Mk1 and Mk2 and the best expert in these cars (who knows every detail about GT3 for track setting told me what you said is not correct)
OK, I said 5mm up front... they actually put the spacers both front and rear... I got this information from the PCA website, Here's the info.....
http://www.pca.org/tech/tech_qa_question.asp?id={2B1D81D2-9E14-4E7C-B25E-35781F2AF0EE}
I am thinking of purchasing a second set of wheels so that I can mount track tires on them for DE events. Is it safe to be considering a wheel that would require spacers on the front for track use?
What Porsche did for the ROW 996 GT3 street car (1999-2001) was to add on a 5 mm spacer all the way around. Then they made corresponding lug bolts, which are 5 mm longer for this purpose.
996.361.605.90 spacer 5 mm (qty 4)
996.361.203.90 lug bolt +5 mm (qty 20)
...or 16 of those, and...
996.361.057.90 anti-theft bolt +5 mm (set of 4)
Since the part numbers end in .90, these are motorsport parts and normally that means your US dealer won't be able to supply them. You would need a European dealer, or a supplier like FVD. In this case, I believe the US dealer parts system does show the number for the plain extra length lug bolt, and they can be ordered, but I don't know about the spacer. Those are available aftermarket.
I don't know what the maximum is, and if you pursue it, be prepared to have the tires hit the bodywork, perhaps over bumps, bumpy corners, maybe while turning or parking (with the steering wheel turned all the way), etc. It may be possible to use a 15 mm bolt-on spacer in the rear, but I can't say for sure as we aren't recommending changes like that.
Joel Reiser - PCA WebSite - 10/29/2002
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