Jakeg97

iTrader: (56)

nice street race ^^^^^^

Warrtalon

iTrader: (6)

No, the gears are shorter in the early gears. 4th also runs out at 111mph for us, whereas they can go to 120+ in 4th.

Mr.MR

Of course not, we were on a sanctioned track. Of course this was not a racetrack and we were not being timed(tongue out to Mitsu). I would never street race, especially against a friend who is a law officer.

So I guess the gears gave me the jump on him in the first 100ft. How come he still couldn't pull on me though? Oops, I just remembered he has the SSL package. We are the same weight, so his car should outweigh mine by about 75lbs. That would give me a car on him right there.

Greyfox5

iTrader: (1)

yeah u cant hit 12's nor attempt to hit 11's without that setup. i have an 05 and its not that much diff stock.

Warrtalon

iTrader: (6)

Where have you been? You must have missed all the recent timeslips posted, namely mine.

Can't hit 12s without that setup? 05 is not much diff stock? You can hit 12s on a stock 05, first of all, so you can hit 12s without ANY setup. Secondly, 2 of us have hit 12.2@111-112 with just exhaust and afc (one with, one without mbc). 03/04s can't get close to 12s in stock form, because 05s have 20 more whp on average. The only thing keeping me from 11s without cams (or flash) is my 6spd being limited to 111mph in 4th.

EvoTio

iTrader: (10)

Actually, some 03's have run 12's bone stock. I believe Malibu Jack was one of them. I definitely was not one of them, especially in the land of 91 octane.

Warrtalon

iTrader: (6)

Perhaps a few have, but they would be incredible anomalies aided by perfect conditions and perfect driving. The stock 03 can only do 101-102mph in the 1/4, and since the stock clutch is so weak, 1.6 60's are incredibly unlikely, so that's just not enough to get 12s. The few who may have done had something in their favor, whether it be a slightly stronger stock Evo, great track conditions, or they are just incredible drivers. With an 05, just about anyone can hit a 12.9x if they get the launch right, so it's a matter of averages. On average, 05s hit 13.1@104 while 03/04s hit 13.4@101. That indicates a significant and measurable difference in power with maybe some improved shifting involved.

EvoTio

iTrader: (10)

This is true, just wanted to point out that it has been done. The trap speeds alone on the 05's show that they are about 20 horse power or so stronger than the 03/04's. I am curious what the 05's are putting down on our terrible 91 octane here in California.

fromWRXtoEVO

iTrader: (18)

When I first got my 05 MR, I got two friends with a 04 Evo that want me to compare them. My bone stock 05 MR was equal from a 30-110mph roll than my buddy red 04 with a B&B Turboback(no cat) and cone filter, more over my gas tank was absolutely full and his was in reserve.


I haven't rematch the person again but just think about this, his car full 3" TB plus CAI and less weight(100lbs less in gas alone) and my car with no mods and more weight and still equal.. WOW!!

Mr.MR

I keep seeing you post this problem. I have the RT615's in 245/45 on my MR now. I keep thinking I should get the 255/40's since they are .6 inches shorter and will keep my gearing nice and short. I am more interested in 0-100 than 100+mph, so the 255/40's seem to be the right choice for me. You, on the other hand might benifit from the taller gearing Warrtalon. You could see 11's at well over 111mph. Now if your more interested in auto-xing then the point is moot I guess. Just my .02.

Warrtalon

iTrader: (6)

Yes, this was mentioned as a potential work-around for the 111mph problem, but I have yet to see it in action. I'm waiting for someone to eclipse 111mph with the stock rev limiter in an MR with taler tires. If it works, then I may try it one day, but that would only be to prove I can hit 11s, not to compete. I am only interested in auto-x and road racing for the long term...

Mr.MR

I had a feeling your more autocross then straight line. Well, if I keep the 245's I'll have to let you know what happens. Do you think the height will hurt my launch or 1st,2nd, and 3rd gear speed alot? The tires are rated at 245=806rpm vs. 255=825rpm. I don't want to lose the advantage the 6-speed gives us.

Warrtalon

iTrader: (6)

No clue on that at all...

Knyght

iTrader: (1)

245 and 255 has 'almost' nothing to do with 'height'

The typical stats are as follows for example "245/45/17"

245 is the width in mm of the contact patch, 45 is the height(which is technically the aspect ratio of the width, so it's 45% of 245) and 17 inches for the rim.

So a 245/45/17 tire shows a total height of 220.5mm + 17 inches. Convert/add and you have total height.

A 255/40/17 would have 204mm + 17 inches. Thus would be a smaller overall height.

If you went with a taller overall diameter you would be able get a higher trap speed on the same gearing. The taller diameter would make your gearing longer. So if you had alot of power that wraps up too fast in those lower gears, then a longer rpm range could benefit you, along with better 60 foots. But I dont think a taller overall height would help an otherwise stock car. Then again, if shifting isn't a downfall for your driving skills, a smaller height would let you be able to get into another gear well before the end of the track. It just really depends on how desperate you are. Gearing changes happen on race cars all the time, just depends on what you need at the time.

For instance, as warrtalon stated he is limited at around 111. If he really wanted to he could go with taller tires and possibly make a higher trap speed. Unless he continues to mod his car, then he might benefit from smaller tires. He seems to be right at the edge of his gearing/current power. But, unless you are very serious about drag racing it's prolly not worth worrying about on a nice street car. Buy yourself a junker DSM to play with

Hope this helps with your gearing/drag concerns.

Mr.MR

I don't get it. You are saying the same things as I did. I know exactly what the sidewall height is for the tires. I understand what all the #'s mean. The thing is, I want to know how much effect the taller tire(245/45=25.6" od) vs. the shorter tire(255/40=25" od) will effect the 6-speeds quick gearing. I'm thankful for your help, but we're saying the same thing. I agree that it just depends on the situation and what the car is used for. The thing I'm thinking is that the MR 6-speed should be able to pull away from the 5-speed with the exact same power and same tire height. I don't want to have taller tires that take away the gearing advantage in the low gears, and make the handling less precise due to taller sidewalls. Once again, I appreciate the help, but we are on the same page already.