View Full Version : Auto-x wheel-tire opinions...
Blasphemous
12-09-2002, 11:09 AM
Well, I've decided on the wheels that I want to get. Rota Sub-Zero's 17"x7.5"... they have the size and offset I want at a good price and look good IMO.
The tires I'll probably get are Yokohama AVS ES100's. 235/40's...
Now, are the 235's to big for a 7.5" wheel? I know they're a little small for an 8" wheel. The 235's are about 9.25" wide, so there's a difference of about 1.75" in the tire to wheel width.
SilverNB
12-09-2002, 04:04 PM
curious, why are you getting 17" diameter for "track" wheels?
if you went with 16X7.5 or even 15X7.5 you'd see better results (in acceleration and handling)
tecnic1
12-09-2002, 04:23 PM
personally, I would get the smallest rim that would fit over my calipers with falken azenis...
oh, wait, that's what I have...
I like the subzeros though. I think I like the attacks better though.
Blasphemous
12-09-2002, 04:43 PM
Originally posted by SilverNB
curious, why are you getting 17" diameter for "track" wheels?
if you went with 16X7.5 or even 15X7.5 you'd see better results (in acceleration and handling)
Point taken... I might get the Rota's for my driving wheels and use my stockers (16x7) for the track wheels. 225's will fit alright, but I'll probably go with 215's or 205's with a lower sidewall.
roadRacer
12-09-2002, 07:01 PM
I have 15x7 rims for track tires with Hoosiers and 16x7's for street tires. The hotshoes with GSLSE's typically run 13x8's so... I admit that I never plan to go beyond local area. Oh, I have 205/45 tires (track tires might be 205/50). The national level guys are running 225/45-13's on a GSLSE. I couldn't really tell you what the SP or SM guys are doing for the TII's. I don't think the added gearing of the smaller diameter is that important to you since your car has more torque.
If you are running stock class the usual is to get some street rims in the size you like and use your original rims for track rims, but I am guessing you already have enough mods to take you out of stock...
Blasphemous
12-09-2002, 07:13 PM
Originally posted by roadRacer
I have 15x7 rims for track tires with Hoosiers and 16x7's for street tires. The hotshoes with GSLSE's typically run 13x8's so... I admit that I never plan to go beyond local area. Oh, I have 205/45 tires (track tires might be 205/50). The national level guys are running 225/45-13's on a GSLSE. I couldn't really tell you what the SP or SM guys are doing for the TII's. I don't think the added gearing of the smaller diameter is that important to you since your car has more torque.
If you are running stock class the usual is to get some street rims in the size you like and use your original rims for track rims, but I am guessing you already have enough mods to take you out of stock...
I'm still in stock right now, all I have for performance in a filter and fuel pump (and that doesn't do much in itself). Hopefully, by the next time I run, I'll have a few power adder mods put on and either wheel/tires or suspension.
roadRacer
12-09-2002, 07:33 PM
then definately put track tires on stock rims and get what you want for the street. Align suspension with as much negative camber as possible in the front (you will still want more than is available) and as much positive caster as possible. Set the toe to the out side of zero (this might be a little too squirrely for the street, you can judge for yourself). If that is too much set it as close as you can to the toe-out side of the factory settings. I do my own alignments so it doesn't cost anything (ask me how if you don't already know). Shocks will add more than you think they will. See if you can find yourself a set of used R compound tires like Trip did, that you can abuse in the learning process. Either go to a pro race or something like that where they are tossing away piles of them or buy a set from some other well funded road racer or autocrosser (I got mine for $100/set with about half tread). Then have fun in the learning process. Spend your first few months driving your car at every autocross you can afford to attend and have a blast. After 3-6 months the desire to become competitve will make you figure out the best things to spend money on modifying your car.
My idea of the best way to start autocrossing. Your Mileage May Vary.
Blasphemous
12-09-2002, 07:35 PM
Originally posted by roadRacer
then definately put track tires on stock rims and get what you want for the street. Align suspension with as much negative camber as possible in the front (you will still want more than is available) and as much positive caster as possible. Set the toe to the out side of zero (this might be a little too squirrely for the street, you can judge for yourself). If that is too much set it as close as you can to the toe-out side of the factory settings. I do my own alignments so it doesn't cost anything (ask me how if you don't already know). Shocks will add more than you think they will. See if you can find yourself a set of used R compound tires like Trip did, that you can abuse in the learning process. Either go to a pro race or something like that where they are tossing away piles of them or buy a set from some other well funded road racer or autocrosser (I got mine for $100/set with about half tread). Then have fun in the learning process. Spend your first few months driving your car at every autocross you can afford to attend and have a blast. After 3-6 months the desire to become competitve will make you figure out the best things to spend money on modifying your car.
My idea of the best way to start autocrossing. Your Mileage May Vary.
I found an oil pan that I think will fix my problem/worry. Moroso makes a twin baffled 6 1/4 quart pan for like $258. That's going to be my next upgrade.
ZoomZoomH
12-09-2002, 08:07 PM
Hoosiers on the stock rims baby!
for racing of course
those sound like nice choices for street tires :)
Blasphemous
12-09-2002, 08:11 PM
Originally posted by ZoomZoomH
Hoosiers on the stock rims baby!
for racing of course
those sound like nice choices for street tires :)
I want to stay out of the Prepared class, stay in the BS (B stock) for as long as possible.
ZoomZoomH
12-09-2002, 08:17 PM
huh? you guys don't allow r-compounds in stock class???
Blasphemous
12-09-2002, 08:29 PM
Originally posted by ZoomZoomH
huh? you guys don't allow r-compounds in stock class???
I don't know for sure... if R's are allowed, then bring it on :)
ZoomZoomH
12-09-2002, 08:36 PM
SCCA rules definitely allow R's in stock class.
I'm not sure about NASA rules.....
so victoracers can keep me in DS and not DSP
Blasphemous
12-09-2002, 10:08 PM
Originally posted by trip
so victoracers can keep me in DS and not DSP
That's what I'm sayin. I'm already slow enough in BS, don't need to be in BSP.
vbspec
12-09-2002, 10:12 PM
If you change rim size does it put you in street prepared?
I run a SpecV and want to get a set of race tires but, my stock rims are 17 inch I want to run a smaller rim. But, I dont want to not be able to run in STX. I run in DSX now but my suspension will be here for Xmas. If anyone knows please post. Thanx
Michael
ZoomZoomH
12-09-2002, 10:37 PM
SCCA rule basically says you MUST keep stock rim size (you can swap out for lighter rims of course) to stay in stock class, but R-compounds (Victoracers, Hoosiers) ARE OK, and is probably THE biggest enhancement you can do in stock class (at least 3-4 second difference for a good driver)
change of rim size should still keep you in STX. You have to do A LOT more than just rim size to be bumped to SP classes... (like stripping out interior trims, removing seats, etc...)
roadRacer
12-09-2002, 10:41 PM
Just for clarification. Stock rim sizes on an otherwise legal stock car ( still allows alignments, shocks, cat back exhaust ) and any DOT R compound tire (Victoracer, Hoosier Autocrosser, A302, BFG G-force R or whatever it is called now) is allowed in stock. You are allowed the same tires on any sized rim (and other mods) in Street Prepared. If you run a non-DOT tire (aka a full racing slick like Kenan runs on the yellow Mustang) then you have to run in Prepared where you are allowed to gut the interior and do lots to the internals of the engine.
Now STS, STX and SM really don't follow these guildelines and are an exception.
vbspec
12-09-2002, 10:45 PM
many thanx
Michael
ZoomZoomH
12-09-2002, 10:52 PM
thanks for the clarifications roadRacer :)
so i was running in the wrong class all along? I have eibach springs and bilstein sport shocks and that it is but i run victoracers and that put me in DSP. should i be in DS with that set up of springs, shocks, and victoracers?
98sr20ve
12-10-2002, 07:20 AM
Stock class allows a change in rims as long as the size and width is the same. The offset can only change by .25 inch's. As far as the spec V. I would find some light 17's and use either your stock wheels for track wheels or the other way around.
jetroc0088
12-10-2002, 08:19 AM
No Trip. As soon as you lowered your car you went into DSP.
roadRacer
12-10-2002, 07:15 PM
Originally posted by trip
so i was running in the wrong class all along? I have eibach springs and bilstein sport shocks and that it is but i run victoracers and that put me in DSP. should i be in DS with that set up of springs, shocks, and victoracers? Nope, you can change the shocks, but you can't change the springs in stock. You can run any size Victoracer that will fit on stock dimension rims.
Originally posted by roadRacer
Nope, you can change the shocks, but you can't change the springs in stock. You can run any size Victoracer that will fit on stock dimension rims.
hum... i still have my stock springs laying around??? Tripey may play PAXey.
Blasphemous
12-10-2002, 07:49 PM
Originally posted by roadRacer
Nope, you can change the shocks, but you can't change the springs in stock. You can run any size Victoracer that will fit on stock dimension rims.
So if I get a "sleeve kit" coilover set (K2RD) then what tires should I run to stay in that class? I'm in B-Stock right now... so I'm not sure what I'd be moved up to. I'm still a HUGE auto-x newbie.
roadRacer
12-10-2002, 10:55 PM
Originally posted by FastX7
So if I get a "sleeve kit" coilover set (K2RD) then what tires should I run to stay in that class? I'm in B-Stock right now... so I'm not sure what I'd be moved up to. I'm still a HUGE auto-x newbie. Coilovers will move you to street prepared. Then you can use any rim and any DOT approved tire. Allwed headers, ignition and external mods to engine, any spring sway bar, camber plates, etc.
ZoomZoomH
12-10-2002, 11:10 PM
yup, SP classes aren't friendly to noobs, very hard to do well :(
try stay in STS/X or stock for the time being while you get your feet wet
tecnic1
12-11-2002, 02:54 PM
Originally posted by jetroc0088
No Trip. As soon as you lowered your car you went into DSP. trip was in sts with the lowered car...
the kumhos put him in DSP
vbspec
12-11-2002, 03:01 PM
What tire is better Ecsta V700's or the Victorracer V700's?
lightningd
12-11-2002, 11:24 PM
Originally posted by tecnic1
trip was in sts with the lowered car...
the kumhos put him in DSP
i second that notion
jetroc0088
12-12-2002, 09:04 AM
Originally posted by tecnic1
trip was in sts with the lowered car...
the kumhos put him in DSP
Does a 325is have a limited slip diff?
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