<center><img src="http://www.hostdub.com/albums/veeman_album01/Hpim0872.jpg"></center><p>I'm going to be getting a 1985 4kq in the next couple weeks and I'm already planning for upgrades. :)
I heard of some rubbing issues with 17s, especially lowered. I'll be most likely getting H&R springs for the car and I want to avoid having to roll the fender, yet maintain the wisest wheel/tire possible in 16-17" sizes. What wheels would fit this bill? What offset ranges should I be looking for? Anyone have any pics? Any pics of cars w/ the dark gray exterior?
- GT Style -
04-28-2005, 11:37 AM
Since you didn't give a budget that's a decent setup. Spend more & get Bils or Koni's.
Rubber is the most important upgrade you can make, it controls stopping, turning, acceleration.
Please don't get some stupid 17" rims, even 16" is pushing it.
04-28-2005, 11:41 AM
04-28-2005, 12:18 PM
04-28-2005, 12:21 PM
Something like a 40 or a 42. My 17's are 40s, and I don't rub. Only when I hit a bump will the rears rub on the plastic fender trim.
04-28-2005, 12:34 PM
04-28-2005, 12:36 PM
There are SO many reasons not to put oversized rims on a car. The 4000/CGT came with 14" rims so 20"s would be a +6 fitament. That's insane. First you will absolutely kill the ride. Second, you'd have a SMALLER contact patch...the size you would need is 165/30/20 (yes, 165)...and even that would throw a 3% speedo error into the mix. If they made them, the "perfect" size would be 195/20/20 (yes, 20 aspect ratio), but they don't make tires that low profile.
Now, lets assume for a second you decide that you are OK with 165/30/20s...the unspring weight of a 20 is going to be a LOT more than a 14". Every 1# of unsprung weight is = 10@# of sprung weight, so it's adding a TON of weight to an already slow car. You think your CGT or 4000 is slow now? Count on the 20s adding at least 1-1.5 seconds to the 0-60 run. Also due to rotational inertia, your braking distances with by exponentially longer (to the point of being dangerous unless you do a big brake upgrade at the same time).
OK, so 20s are a BAD idea...so what's a good idea? Well, for performance, you want 15s or MAYBE 16s...anything bigger is 100% pure BLING. Now, if you really like the looks of chuck-wagon wheels with rubber bands...then go for 17s. With 17s you'd be ruinning a 205/35/17 tire, you can't get much lower profile than that..
But beware of that even to equal the performance of a 15"...you need a VERY light 17". Why? The polar moment of inertia increases with proportion to the square of the radius. So given the same weight, the smaller radius wins. If the 17" wheel is a factor of 1.28 lighter however, they would be even (again, ignoring the moment of the tire). So to equal a 15" wheel which weighs 20 pounds you would need a 15.625lb 17" wheel.
So, if you are looking for best performance, go for 15", best ccombination of looks/perfomance go with 16" and for bling bling looks, go for 17s...
04-28-2005, 05:55 PM
205-40-17 no rubbing but yes they are heavy bastards...
04-28-2005, 06:57 PM
Super super light. Some of the lightest wheels available for our cars.
Have any use for ONE extra Type T rim? I have one in my garage if your interested.
04-28-2005, 08:35 PM
Just looking good, GUYS stop giving me ideas will ya
86 Coupe GT
04-29-2005, 04:31 AM
Ah, don't let him get to you. He's just jealous of our uber-GT's.
86 Coupe GT
04-29-2005, 05:04 AM
You know Dave, almost no one on this forum has their car on the edge enough that the weight difference between 17's and 14's makes a notable enough difference to make their use unjustified. In a real world senario, I've driven my car with 14's, 15's, 16's and 17's. There is little perceptable difference between them, except that ride gets harsher with less sidewall - but, conversely, turn in is so much sharper between my 17's and the 16's I have that it makes the car more fun - if a little more tense - to drive.
However, the main reason I have 17's on my car? The Speedline 5 spokes are undeniably hot, but I got them becuase they're EASY TO CLEAN - and that matters a lot, especially after having BBS's on the car. I know you spend a lot of time putting anything over 16" down, and you have some points, but few on the list have a set of all 4 (14-17) wheels, but I do, and I'm telling you there isn't anything wrong with them. Unless, of course, you hit a pothole. But, with 205-40-17's, my speedo isn't off, and I've got sharper turn in, and the car has more grip than I had with Dunlop SP 8000's on the R8's. Soooooo....I'm not saying your wrong, but I also don't think you're completely objective in your arguments.
04-29-2005, 05:10 AM
86 Coupe GT
04-29-2005, 05:28 AM
I do, and I track on 15's, but mostly because of tire costs and wheel costs, not necessarily because of performance, and very few on this list track their cars. And of those that track their cars, very few approach the edge of the performance envelope closely enough on a constant basis that the difference could be measurable. I track my GT a lot, and I'm quite fast with it - faster than many new cars and cars that should be faster, as an instructor for the Audi club, but I also recognize that the limits of the car are realistically higher than I can approach. I just don't see how you can quanitify performance differences when so much else is at play. Again, you're looking idealistically at a non-ideal situation. If you put a Schumacher-type in the car and were able to replicate exact conditions every run, yes, you'd see a difference, but comeon.....let's get real.
04-29-2005, 05:43 AM
<center><img src="http://www.quattro.ca/4kq/0009.JPG"></center><p>Here is the info on 5-bolt swap.<ul><li><a href="http://www.quattro.ca/4kq/4kq.html#pictures">http://www.quattro.ca/4kq/4kq.html#pictures</a</li></ul>
04-29-2005, 07:54 AM
04-29-2005, 09:36 AM
Do those rims in 16" form and 17" clear a big brake kit? Where did you get them? me likey
04-29-2005, 09:42 AM
But for the AVERAGE person, they'd never really see the difference from stock 14"s either...
04-29-2005, 10:00 AM
So I'm well versed in the differences of tire size. I'm thinking I would want 16s, or maybe 17s. How hard is it to tuck in the plastic in the rear well to eliminte rubbing? Any pics?
04-29-2005, 10:36 AM
I'm not gonna lie, I'm in it for the looks.
04-29-2005, 10:38 AM
86 Coupe GT
04-29-2005, 11:14 AM
So, if the difference comes down to looks, guess where Max and I put our votes :-)
- GT Style -
04-29-2005, 11:34 AM
04-30-2005, 11:03 AM
04-30-2005, 12:01 PM
04-30-2005, 12:25 PM
The easy way to do it would be to let the tire rub it until it's all gone. That's what I'm doing, it doens't bother me too much.