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balefire
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Posts posted by balefire
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Your source is wrong.Wheel diameter can be changed independent of suspension or alignment provided the fitmentis correct.Your 255 width is incorrect and would undoubtedly cause speedometers errors and psm errors.UPDATE: I found out that if you own a 996 you have to get the suspension tuned to handle 19" tires. On my previous post I mentioned that I did not know if my suspension was tweaked or not, I found out that it was. It was tweaked to handle 19"/295 tires. I have no rub in the inside of my wheel well and it does not hit my suspension or make contact when I go over bumps or corner really hard duing autocrossing. In fact I took off my rims for winter ( where I am they put salt on the roads) and put on 18"/255. The ride is the same, however 2 things happened. One, for the first mile my PSM would kick in everytime I turned left or right I guess the computer had to re learn the smaller tires. The second thing that has happened is now my car reads me going faster than what I really am, it shows I am going 4mph faster than my actually speed. Which was backed up by a certified radar. When I acquired about the speedometer being off 4 mph as soon as I change the tires and a look at my suspension. I was told my suspension was tuned to handle the tires it was orginally riding on and along with my ECU. The meat of this story is, you can use 19" or 20" tires but you will have to get the suspension tuned to handle the extra size. The 996's originally came with 17' tires, with the option of 18" and the 997's come orginally with 18" and the option of 19".
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Not to hijack the thread ... but: I have a chance to purchase a set of wheels 18x7.5 and 18 x 9.5 respectively for almost nothing. I was thinking about using them as a secondary set for winter, etc....
I have 18x8 and 18x10 mounted on my 99 996 cab at the moment. Is the .5 in diff going to have a significant effect?
Hi Loren,
The offsets are 50 and 54 respectively.
Serg
I was hoping that since the rear wheels were 9.5 in., that the narrower rim might make up the difference and not have the tire rub on the fender.
Serg,
The wheels will fit your car. They may be a good winter set since they are narrow, but would not make an ideal summer set since stock tires may have tire squirm on that narrower wheel.
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Balefire...thank you for the clarification. Very helpful. There is just one thing that I still don't get. Hopefully this doesn't come across as obtuse....
Fronts:
Got it...I need a 7mm spacer to bring the offset in line with my current OE setup. No questions.
Rear:
Is the issue one that my current wheel is 10 inches wide versus the 11" wide wheel that I want to buy. It's not a tire issue then? I figured that mounting the correct tire size (295/30) and playing with the offset would work. What if I go with 285's.
I guess I have to keep looking for the Carrera I wheels made for the 996
Thanks again.
Although some people can run a skinny tire to solve this problem, that is not a good solution.
http://www.1010tires.com/Tools/Wheel-Offset-Calculator
There are plenty of other 996 and 997 wheels that have a better offset to fit your NB mk1 996.
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Found another set of the same tires! I really love the 5 spoke design and I like the fact that they are not chrome as on my 2000 C4
So, the new set are the same as the other ones I found (I guess people don't like them):
235/40/18 ET 57
295/35/18 ET 51
Interersting how Oggie says the correct tire fitment is 245/40 and 295/30.
So, if I buy these I'll need a 7mm spacer up front and 13 mm spacer in the rear. Can anyone confirm this?
Thank you!
I guess I wasn't very clear in this thread.
The front 997 wheels and tires WILL FIT with a 7mm spacer.
The rear 997 wheels and tires WILL NOT fit your mk1 996.
The rear wheel WILL RUB the fender unless you do the following:
1) extreme negative camber which will probably cause premature inner tire wear
2) roll the fenders which can damage the paint.
As I said before NO spacer will fix the rear wheel offset.
99% people would NOT get that wheel tire combo for their mk1 996.
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I never noticed a reduction in torque with my bypass pipes on the street and definitely not on the autox course.
But with my stock headers and cat and bypass pipes, I'm at the sound limit 100 db for my local autox region.
I can't imagine how loud your setup would be.
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Neg camber can cause inner tire wear, but usually its toe that causes the wear. Getting toe as cose to zero as possible will reduce inside wear.
I'm not sure this is correct.
Toe will affect a greater portion / almost all of the tire whereas camber can cause inner tire wear.
Although you would like to reduce tire wear, remember reducing camber and making the toe close to zero as many have recommended will loosen the rear of the car which might make the car unstable in emergency situations for your girlfriend.
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36f/44r psi is porsche stock rec.
i flip my tires regularly due to the negative camber.
when in doubt, alignment is always a good idea.
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Ive been doing 35 Fronts and 43 Rears. Just changed my rear tires due to massive inner wear and they told me Im supposed to be at 36 Fronts and Rears?
Tire Sizes:
225/40-18 Fronts
265/35-18 Rears
Also is anyone else having massive inner tire wear? Do these cars have negative camber stock?
Thanks in advance.
I think your old tire pressures were fine and were close to Porsche recs.
Your alignment will affect the inner tire wear 100x more than your tire pressure will.
Yes, the stock porsche alignment has negative camber. You can dial it out, but understand the consequences in handling.
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The stock wheels for a 997 NB such as the targa have a higher offset front wheel and lower offset rear wheel.
The bolt patterns are the same.
However, the 17" wheels were not stock.
So it is guess work whether they would fit unless we knew the dimensions (width, offset, tire size, etc)
Good luck
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NO spacer will correct the wheel offset in the rear on those carrera 3s.
however, 997 tire size works fine on a 996 provided the wheel is the correct offset and width.
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Mk1 1998 to 2001
Mk2 2002 to 2004
The rear suspension changed for mk2 that allows a wider or more offset wheel.
That wheel will rub on the outside of the tire with your fender in the rear
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I have the same wheels and tires.
although they fit my mk2, the rear wheels will not fit your mk1.
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I think my car may have a bad coil pack.
Flashing CEL, heavy vibration on acceleration.
63k miles. New plugs 5k miles ago. Original coils.
Is it ok to drive to the dealer 15 miles away in stop and go traffic?
Or will it toast my cat by doing that?
Thanks!
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i am going to plasti dip the spokes of my autocross wheels blue next weekend. my son loves blue
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I have 19s. I dont like the ride, but they look good. Anyone know what these are. Looking for a good 18 inch wheel after these tires go bad.
ssr wheels.
to the OP, the champion rg5 wheels are great wheels and would make any 996 look better, but the tire sizes are not perfect
i have 19 in wheels and couldnt be happier
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After reading the TSB for "summer tires, wheels and spacers" it looks like the 99-01 will not take a GT3 wheel without rolling the fender, yet the 02 and above will. I'm assuming the 02 and above are slightly wider or have the fenders already rolled. If you notice below, the differences is the GT3 wheel is 13mm closer to the suspension and will stick out 17mm more. In the same TSB it also states that a 17 mm spacer can be used on the 10Jx18 offset 65 with 265 tire without rolling. If this is the case then why can't the GT3 wheel be used without rolling the fender? Has anyone else used the GT3 wheel or other 11" wheels with offset of 63 or less on a 99-01 996 without the need for rolling?
My pss9's go on the car tuesday and new wheels in the future but I'm becoming anal about fitment after reading too many differing opinions about what works and what doesn't.
Thanks for any input or comments
Wheels: Wheel 1 Wheel 2
Wheel size 18x10 ET 65 18x11 ET 63
BackSpace 204 mm (8'') 215 mm (8.4'')
10 mm (0.4'') deeper.
Rim Lip 14 mm (0.6'') wider
Tires: Tire 1 Tire 2
Tire size 265/35-18 295/30-18
Section width 265 mm (10.4'') 295 mm (11.6'')
Sidewall 93 mm (3.7'') 89 mm (3.5'')
Tire diameter 643 mm (25.3'') 635 mm (25'')
Speedometer Assuming that this is OEM tire and speedometer readings are correct When speedometer reads 60mph (96.6km/h) actual speed will be 59.3mph (95.5km/h): 1.2% slower.
Clearance: Package 1 Package 2
Suspension Assuming that this is OEM wheel/tire and there is no any problems with clearance on both sides Package is 13 mm (0.5'') closer to suspension/brakes components. Acceptable for most cars.
Fenders Package will stick out 17 mm (0.7'') farther. Make sure that you have enough room under the fender. If not, consider narrower tires or higher offset.
Wheelwells 100% clear (leaves even more room than OEM)
I know this is an old thread, but I'm about to order Porsche OEM Sport Techno wheels with 11x18 ET 63 and 295/30x18 rears for my 2001 C2 (narrow body). This is the same as the GT3 spec, so I'm wondering whether I need to get the rear fenders rolled. Pac911, how did this work out for you? Did you get the GT3 wheels without fender rolling? In the event I need to get the rear fenders rolled, how big an expense is this? Thanks.
There is a difference in rear suspension between mk1 and mk2 996 NB that allows a mk2 NB to fit a wider wheel and still clear the fender.
However, 18x11 et 63 on 295/30/18 should fit a mk1 NB assuming stock suspension and alignment.
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What about bosch coils? Any reason to choose Bosch over Beru coils?
Part 0 986 221 016
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what about k&n oil filters?
and which filter is OEM? mahle or hengst?
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On my dectane LED 997 tail light for my 996 mk2 car, the install took 5 min total. One 10mm bolt. One connector each side. Truly plug and play. No CELs despite multiple LED lights throughout. Unfortunately, the cost is prohibitive. Carlightpro is the official distributor of dectane in the US and they charge $850. I saved $250 by getting mine from Pitlane which is an overseas european company which exported the lights to me over a 1 month process. Still, thats a lot more than the Asian older style LED lights, but to me the quality and look was worth it.
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I've searched all the TSBs and whatever FSMs I could find.
No luck for the 996 non GT3
I did find this for the GT3.
http://forums.rennlist.com/rennforums/4611961-post8.html
Any other references for a slotting/shim/camber bolt for the 996 non GT3 in a TSB or FSM I would appreciate.
Thanks!
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after lots of phone calls to parts places and internet searching, 3 weeks later my dealer found a random plug in a porche tool kit that matched.
picked up my car yesterday
logray thanks for all the help.
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I'll probably have my bumper off next week and if i can remember will take a look at that connector and see if there is a part number on it.
In the case of the engine wiring harness connectors you can buy replacement sockets and plugs, so it's possible they are using the same setup with that plug. I seem to remember it being different though.
This is just a guess, but the #2 on the left side in the link I gave you is for the left lights and trunk release, plus other things on the left side. The harness on the right is for the lights on the right plus the temp sensor and other stuff on the right side.
The year of your car is important though, because in 2002 the right side one became part of the passenger compartment harness.
The part number was the same cost on each side which suggests to me they are the same harness, but perhaps porsche just charges the same.
I'll tell my parts guy and go from there.
I have a 2004 anniversary with the turbo front bumpers if it helps.
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Is the wire OK, is it just the plug socket that is damaged? Sometimes the plugs are available separately and can be soldered on.
If the wire is not ok, you'll need the harness, which could be #3 in this diagram:
http://www.autoatlan...9-05/902-10.php
Thanks for the link.
As far as I know, only the plastic socket is damaged.
However, my dealer has been unable to find the part number for either the plastic socket or the entire wiring harness
That pic shows a wiring harness on both sides, with similar prices.
I thought the ambient air temperature sensor is located only on the passenger side?
Here's another link with the part number for the temperature sensor, but not the plug it goes into.
http://www.renntech.org/forums/topic/32425-outside-air-temperature-sensor-failure/
Any ideas? Thanks.
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A semi truck cast a piece of its retreaded tire right in front of me and it made a small hole in my bumper.
Unfortunately it also damaged the plug that the ambient temperature sensor goes into.
My local Porsche shop has tried finding the part number for the plug and have been unsuccessful.
They have also tried calling Porsche Germany and that hasn't worked either.
It has been 2 weeks and still no luck.
Any ideas or a part number to look up?
The sensor is number 25 in the attached picture, but I need the plastic plug that it goes into.
Thanks!
odd lug nut torque question
in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)
Posted
Often the wheel is not perfectly seated until the second lug is placed.
Thus, the first lug usually must be readjusted after applying the remaining lugs.
I bet someone forgot to retighten the first lug.