I think you will find a total diameter difference of .9". This would mean you would gain about .45" of clearance before you rub the top of the inner fender liner.
Later, Steve
Later, Steve
Grant said:http://www.smokemup.com/utilities/calc/tire_diameter.cfm
I've had stock suspension with 275/315s for a while, and I didn't think tire temps were that bad. In the rear I think they were pretty even, obviously up front it was all at the outside egde.
Did you remove those 3 screws on the outside of the wheel well? You need to or the tires will rub, especially KDs.
BTW Mike... I talked to John Purner last week.... he checked your order... you have 17x9.5's and 17x11.5's.fleadh said:
Nope, literally all i did to make the wheels/tires fit was have the rear lips rolled... didnt touch anything else.
Cool site for diameters of the wheels... thats almost an inch of height savings with the 18's.... god damn. Wish i could run 18 fronts for the OTC, id buy a pair.
-mike
I like 17's.... preventing bent rims is a plus.carcnoid said:Andi,
Why are you going with 17's up front? Why not 18's? Bent rims?
That is correct.jkbrauch said:I've had suspension people tell me suspension geometry works best with horizontal control arms at resting ride height.
I run mine at about a .25" drop. I get tire rub up front if I go any lower even with the stock bumpstops and 750 lbs. springs. The problem with rubbing isn't tire wear as much as that if you rub the top of the fender long enough you'll wear through that plastic piece behind the fender liner and start rubbing a wire harness that runs up there. Bad things will happen quickly once that starts. In a video I'll post the URL for shortly, you can hear what my car sounded like with a ~1" drop. It would rub on just about every corner and/or bump.I assume we're not going to road race at stock ride height (has anyone done this with coilovers/big tires?) because of the roll center being so high. I'm using Kumho tires (315 in rear) and the handling is spectacular compared to the stock wheels. I ran many laps with the rub and didn't lose much rubber, so the rub can't be that bad. I'm going to heat gun the liner where it's rubbing and try to deform it just enough so it won't rub.
Jeff
Eric said:
That is correct.
I run mine at about a .25" drop. I get tire rub up front if I go any lower even with the stock bumpstops and 750 lbs. springs. The problem with rubbing isn't tire wear as much as that if you rub the top of the fender long enough you'll wear through that plastic piece behind the fender liner and start rubbing a wire harness that runs up there. Bad things will happen quickly once that starts. In a video I'll post the URL for shortly, you can hear what my car sounded like with a ~1" drop. It would rub on just about every corner and/or bump.
Eric
Correct. I have 275/40-17s up front. I have not looked into relocating the harness because IMO, lowering the car much isn't a good idea. There just isn't enough suspension travel up front before the tire hits something.fleadh said:
Eric,
You get that rub with 275/40/17 fronts rite? Or is that with 18's?
What wiring harness is it that rubs? And have you looked into relocating it?
-mike
About the same drop as in the front. I didn't want to change the relative f/r drop. I haven't really experiemented with different rear ride heights though.jkbrauch said:Eric - Thanks for the input. What ride height are you running in the rear?
Jeff
If I remember correctly, my car was only .25" higher in the back with the stock springs. It's worth experimenting with. I just haven't been motivated to do it. Running the 18"s up front should allow for more drop since it's a considerably shorter package than with the 17"s.jkbrauch said:Eric - I notice to level the lower suspension arms in the rear, it has to be dropped more than the front. I guess they were looking at this car carrying 4 people alot of the time. Go figure. Did you notice any handling changes when you raised the car for tire clearance?? I figure with a smaller diameter 18 I can maybe get away with a 3/4" drop - I'll experiment and let you know.
Thanks again, Jeff
Hmm, I didn't know that.jkbrauch said:I've had suspension people tell me suspension geometry works best with horizontal control arms at resting ride height
I don't know - I know I'm using whatever HKS fits to their coilover setup.Grant said:
Hmm, I didn't know that.
So do people use the stock bumpstops in the rear?