924Board.org

Leander · Joined: 02 Nov 2005 Posts: 15

Hey People

Long time ago !
Question.. i've seen some pretty 17 inch rims for the 924 ( see picture )
It is 225 at the front and 255 at the back..

Isn't that much?
The man said it is easy to drive.

Leander

_________________
being 19
driving 924

CSI = Canada Seen It

Going back to Edmonton next year !

Lizard · Posted: Tue Aug 15, 2006 8:36 am Post subject:

I have run 225 all around with no issues on a 924,
and I do now live right beside vancouver.
_________________
3 928s,

Kenodog · Joined: 25 Jun 2003 Posts: 2669 Location: Vancouver,B.C.

225's on the front are doable but I wouldn't advise it. You'll only wear out your steering box that much quicker,not to mention your arms from trying to turn the steering wheel at slow speeds. I have 205's on 7 inch rims on the front and even these feel very heavy in a parking lot.

There are a bunch of us here in Van so just give us a jingle when you're coming and we'll hook up.Where are you coming from anyways ?
_________________
1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

Lizard · Posted: Tue Aug 15, 2006 10:22 am Post subject:

Kenodog · Joined: 25 Jun 2003 Posts: 2669 Location: Vancouver,B.C.

It's only common sense that says the more pressure you put on something the quicker it will wear out. Like the bushings in the steering column and firewall,gears in the steering rack,ball joints etc. Can you honsetly say that you don't think the gears in the steering rack will wear quicker with the extra pressure ?

Come on Lizard you're always telling me what a smart guy you are so then why don't you tell me of one part on any car,even your beloved 928,that gets better with abuse ?

Adding 225's to the front of a 924 is abusing your front end if the car is a daily driver. Period. If don't believe me then ask a mechanic.
_________________
1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

Raceboy · Joined: 01 Mar 2004 Posts: 2327 Location: Estonia, Europe

I've run 225's in the front for 2 years now on my wifes NA without any issues besides sometimes complaining wife (in the supermarkets parking lot), but that is absolutely the maximum tyre width to use without power steering. I just can't use narrower rubber because I use 8.5inch wheels in front. Seriously, I'd put, but I don't want to give up those nicelooking Turbo Twist wheels, so the wife had accepted that also

Most important thing that probably has shortened life due to wide tyres are steering shaft U-joints, so far they're fine, but who knows when they need replacement.....
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

OutOfTheBox · Joined: 31 Mar 2006 Posts: 434

I found that running 2 much width leads to tramlining, on poor road surfaces, especially in the wet.

Leander · Joined: 02 Nov 2005 Posts: 15

Hey,

I've been in Vancouver a few weeks ago. Nice city !
I'm going back in a year.. i liked it to much !

But those U-Joints are they expensive?
Cause i saw some 16 inch 205 in front and 225 in back also, maybe thats safer u know.

Regars Leander

( From The Netherlands )
_________________
being 19
driving 924

CSI = Canada Seen It

Going back to Edmonton next year !

Lizard · Posted: Wed Aug 16, 2006 12:07 am Post subject:

Leigh, first I would like for you to show me a 924 (or a 928) rack that the gears have actually worn out in. I never have, never even heard of it,

I also have never seen any evidence of balljoints, or inner and outer tie rods having a decreased service life because of a slightly wider tire,

these items will wear the most with an unbalanced wheel, or with major alignment issues WAY faster than a slightly wide tire, as well more damage would come to the steering rack internals from a shot inner tie rod which would cause whipping on one end, but even when that happens the rack still doesnt fail

as well I would like to note that the CGT and the 944 which use ALL the same steering parts (83 944 is non PS) both of which ran 225 from the factory.

so I do stand by my origonal statement. and until you can show me the gear and bar from a rack the has ever only had 205 on it and a rack that has only had 225s on it and show me that there is a significant more amount of wear.
_________________
3 928s,

SoCal Brian · Joined: 11 Nov 2005 Posts: 16 Location: San Diego

I recently switched out the wheels on my 931 S and was initially concerned
that the steering would be tougher with wider tires. I went from 205/55/16 in
the front to 225/35/18. Much to my suprise, the steering is much easier than with the stock wheels. I think it's because of the sidewall having much less flex as well as the tire pressure increase from 32 to 45 PSI. I put 255/30/18 on the rear and they are a perfect fit after dropping the spacers and fitting shorter lugs. Overall the handling of the car has improved on dry roads with the wheel swap.

Xenotide · Joined: 06 Oct 2004 Posts: 26 Location: Chilliwack

Hey guys I am gunna have to go with Lizard on this one I have been runn 225s all around for almost 3 years and have had zero issues with steering or wear, and I have to say that I am pretty hard on my car. Infact I just recently had to do a B.C. Inspection on my car and if you have ever heard anything about them they will fail you for the littlest thing like a 2 inch tear in your seat. My car passed with flying color with Lizards help. I have also been friends with Lizard for a long time now and to be honest with all the people I have met through him he knows the most about these cars out of anyone I have met. So I am gunna have to say I trust his word . (Friend or not)
_________________
1980- 924 first Porsche and Restore Project
My girl is getting painted... ABOUT TIME

Kenodog · Joined: 25 Jun 2003 Posts: 2669 Location: Vancouver,B.C.

A gear rack will probably never wear out to the point of failure but you WILL get added backlash in the set. I don't really care what you say,I KNOW different.

Remember when you told me to just swap in the LSD ? I wobbled and took it to a Porsche trained transmission specialist,used by ALL of our local Porsche dealers , and he cringed when I told him what you suggested.He showed me the shim plates that are supposed to be used to properly set backlash between the pinion and ring gear.

Sorry buddy,you were wrong then and you're wrong now.Like I said in a previous post,go to a mechanic and ask him what he thinks.

Also as out of the box says,and this applies especially to people that live in a wet clime, your chances of hydroplaneing (sp?) are so much greated with wider tires. I have great suspension and pretty decent tires and in the rain my car borders on scary when I give it any kind of acceleration. I've often thought about getting a set of 6" rims with stock width tires for the winter. (Mostly just rain here.)

I'm not trying to flame you ,i'm just disagreeing with you. I know it's tough to accept Liz but your not right ALL of the time.
_________________
1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

Raceboy · Joined: 01 Mar 2004 Posts: 2327 Location: Estonia, Europe

Kenodog, aquaplaning depends mainly on tyre design and condition, not width. I've had some terrible slides with 195, 205 and 225 tyres, but not with all of them. Some handle better in the wet and some are just pure crap.
I had 225 Michelin Pilot Sports that were horrible on dry tarmac but absolutely good on very wet (couple of cm's on the track) surface.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

Kenodog · Joined: 25 Jun 2003 Posts: 2669 Location: Vancouver,B.C.

Hydroplaneing also depends on the pressure per square inch making contact with the road.If you put 2" wide tires on then you have greatly increased the lbs. per sq. in. of the rubber that is pushing down on the road. Inversly, wider tires mean less lbs. per sq. in. of the rubber making contact,therefore making it much easier for the water to "lift" the car from the road. This reason is why small cars like Geo Metros and the like are so good in the snow/rain compared to done up cars with 14" wide tires.

If you have identical cars and one has a new set of stock width tires and the other has the same brand tires only a couple of sizes larger in width, the car with the stock tires will out handle,out perform the one with wider tires in wet/ snow conditions.
_________________
1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

Robb Northrup · Joined: 11 Oct 2006 Posts: 49 Location: Mesquite, Nevada

I'm new to 924s (although not new to high performance cars) and was wondering if anyone has worked this combination out.

I'm not interested in the ultimate wheel/tire combination. I've gone down that route in the past and don't want to do it now. I just want a combination that is different -- yet Porsche.

Also, does anyone have experience with water leaks (but not from the sun roof). We just had a rain today and I dound water on the passenger floor, seemingly from the front of the passenger compartment.

Any ideas?