I just went to LACR last night and my best time was 16.1, and I have a 5spd. I went to LACR's website and they said to multiply your 1/4 mile time by .96 to correct the time to be at sea level, which would mean i ran a 15.4 but with 18's!! If i switched back to the stock 15's, you guys think that it would make THAT big of a difference??? Cause my 18's are like 35 lbs each!! They are the "niche shocks". All input appreciated.

 

you'd probubly be a half second faster if you put your stockers back on. 35lbs. each for just the rims + 18" in rotational mass = SLOW car.

 

get some konigs

 

THAT MUCH??? half a second?? DAMN...so that would mean i run in the high 14's.

 

sheesh me too then! I guess I should run my stocks and that would take a half a second off. Hmm that would mean I would be in the 14 for sure.

 

Just buy some 13" steelies w/drag slicks for the track and use the 18's for chillin' in the streets

 

Buy a pair of some 15" SSF wheels with M/T slicks for the track and you'll be set. Those should take off about .5+ seconds (because you'll have great traction too) and run you maybe $1300 all said and done.

 

nah, that mumbo jumbo about bigger wheels being slower is hearsay.

 

My best times are always on my stock 16"
They are around 3/10ths faster than the 17" and they weigh 23.5lbs. compared to 19lbs(Stock).

So I would Imagine you would get a whole lot better time (maybe 7/10ths if yours are 18" and they weigh 35lbs) if you drop 15 lbs a wheel.

 

Well...i just went out and bought a set of the stock 15's for the SE($200)...I just put em on and im goin to the track tommorow so ill let ya all know!

 

say...that's a nice lookin car on the left in your sig pic...yes, it's a fine looking car

 

?

 

yes it is, id like to take some time out to point out the the corner lamp on the right side of the car. its custom.

 

subtract .9 and add 3 to your mph...

ive ran @ lacr the nite b4, and then ran @ fontana the next day. my times were eactly off by this much. and it wasnt just my time, it was my friends times too.

 

Hypothetically speaking, if you had a 15" wheel/tire combo that weighs 35 lbs and a 17" wheel/tire combo that also weighs 35 lbs, which combo would give you the best 1/4 mile times?

 

wheres the fontanna tracks at?? so i take it the fontanna track is closer to sea level, compared to LACR??

 

I'm not an expert on this, but I'd say that there would be a very small difference. The 15" would be slightly better because there is less rotational mass. With the 17", there would be 2" more rotational mass.

-Nick

 

The 17 will be slower.

If you compare two wheels of same dia, similar construction, same weight, one with 17" rim and low-profile tire, and the other with a 15" rim and more tire, the 17 is slower since more mass is concentrated further from the axle. But this isn't the full story - a 17 is usually slower yet since the overall wheel weight goes up, too.

So the tradeoff is basically this: low profile tire/big rim gives you a much stiffer wheel which helps in autocross but doesn't accelerate as quickly. Small wheel / more tire gives you faster acceleration but handles like a dragster.

Dave

 

YES
I've got enough mods to be low 15's (I think) but could only muster up a 15.9 last time I ran. I'm blaming it on my wheels, and on my fat a$$.

 

Yeah right when I put my 18s on i noticed a difference in off the line speed. Those things are heavy. Places where I would normally roll in neutral I would just sit.

 

I have to agree, w/ 18s and especially rims like MOMO's that been known as one of the haviest wheels out there, you can definately feel the difference with stock 16s. But it's still fast enough for me