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Thanks for reposting that instag vid. I would have never seen it since my usage of instag is primarily browsing young ladies w/ daddy issues and/or generally free spirited behavior. The car sounds good sparky.
Here is the tech bulletin from Porsche. It's not essential many run on track without issue to date. But I would recommend it for piece of mind. Small price to pay. Yup that is the one.
Last edited by BLACK-BETTY; 01-29-2015 at 06:11 PM.
Yeah, it sounds very nice. I'd hazard a G-Pipe and perhaps a cup pipe.
Now that's interesting! Tell me what is the aspect ratio? 40 is what I would presume... This chap is running a 35.
Here are pics. For a C4 it requires the line to be slightly bent. Easy peasy.
Here is the tech bulletin from Porsche. It's not essential many run on track without issue to date. But I would recommend it for piece of mind. Small price to pay. Yup that is the one.
Cheers dude. That's added to the list that's as long as my arm.
A 265/35 on the rear, which I've seen Francis mention several times, is 1.23% larger than stock. Not to mention, mismatched aspect ratios are much worse for an AWD car.
I run 245/35's which are only .43" smaller than the stock 16's.
A 265/35 on the rear, which I've seen Frank mention several times, is 1.76% larger than stock. Not to mention, mismatched aspect ratios are much worse for an AWD car.
I run 245/35's which are only .43" smaller than the stock 16's.
Frankie you're not taking into consideration the side wall isn't straight with a stretch. You're comparing square fitting tyres with square fitting tyres.
Thanks for reposting that instag vid. I would have never seen it since my usage of instag is primarily browsing young ladies w/ daddy issues and/or generally free spirited behavior. The car sounds good sparky.
It was WAY too loud. It was straight pipped. Exhaust from the previous owner was a mess and needed a quick fix. Now has full stainless steel exhaust on it.
Originally Posted by Talat
964 3.8RS fronts are 9J and they run 235 tyres from the factory, so obviously Porsche had no issue with it
Well interesting.
Right black whatever
You are in luck as conti doesnt make a 235/35/18 no more so im sure you will argue over this. But every other manufacture out there that does which isnt many. The widest recommended width for a wheel on a 235/35/18 is 9.5. Also the 235/35/19 version of the same tire which conti still make the recommended wheel width range is 8-9.5. So you should go ahead and call them and tell them they are all wrong. You must have some degree in tires with how you go on.
If you are that worried about rolling radius wearing out parts that you have to keep going on and on and on about it. I would suggest that you take your wheels off and put the oem porsche wheels and tires on. Seen as you seem to be so worried about it. You must be really fun to hang out with with how you go on about pointless things.
Frankie you're not taking into consideration the side wall isn't straight with a stretch. You're comparing square fitting tyres with square fitting tyres.
Right so you are saying that my 235/35 on a 9 is stretch. So to you the diameter is smaller becuase of the stretch. So that means it would be closer to oem spec. As a 235/35 is taller than a oem spec wheel and tire combo.
Frank, there is no stretch involved in this equation. I'm comparing a size you continually recommend as the official spokesman for 964 wheel and tire fitment.
A 265/35 on a 18x10 wheel is 1.76% larger than a 225/50 on a 16x8.
So you better quit running 265's, you might break something and your speedometer is reading slow, lol.
Frank, there is no stretch involved in this equation. I'm comparing a size you continually recommend as the official spokesman for 964 wheel and tire fitment.
A 265/35 on a 18x10 wheel is 1.76" larger than a 225/50 on a 16x8.
So you better quit running 265's, you might break something and your speedometer is reading slow, lol.
Frankie,
Between a 225/50/16 and a 265/35/18 there is a 1.75% change, agreed. This is within spec... because the tyres are square. The 225 is on an 8J and the 265 is on a 10J = square tire.
Putting a 235/35 on a 9J the tyre is no longer square so the percentage change no longer applies! The side wall is no longer vertical. It's now stretched. Your aspect ratio has gone out the window. I mean look at the pictures the sidewall is reduced hugely so clearly the rolling radius must also be reduced.
I can't either, Frank. You're doing the exact same thing that you're telling Sparky he shouldn't do.
Originally Posted by BLACK-BETTY
You're causing stress to the the transmission, throwing out ratios, stress on wheel carriers, throwing out speedo readings. Like I said, your car. But don't tell us that you aren't wearing a significant stretch, you are.
I can't either, Frank. You're doing the exact same thing that you're telling Sparky he shouldn't do.
Ok this is the best way I can describe it.
What ever you do your overall rolling diameter (X) shouldn't change. Your aspect ratio/ profile should be vertical. When it no longer is the figures goes out the window.
Your basing your percentage change on an aspect ratio/ profile this is vertical on a stretched tyre it no longer is. Above is much more than a single percent change
01-29-2015, 04:56 PM
