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Discussion Starter · #1 ·
Ok, well back when I was stock I could run in the 15.7's and I even dropped down to 15.6 once. Since my car was stock I have lowered it, added a CAI, and got some 17" ADR GT-Sports, with Michelin Pilot Sport Z rated tires. Before I just had my stock wheels with the stock Michelin Pilot XGT-V4's. My new wheels shouldn't really be a factor cause they aren't to heavy (like 19-20lbs probably). Could someone please help?
 

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Ok, this is only a posibility. By increasing the size of your rims, you also may have increased the size of your tires. A larger radius would make the wheels more difficult to spin. The same thing happened to a guy on a-tl.com who put 19's on his car. It ruined his 1/4 mile times even worse than yours. Also, adding one pound to your wheel is the same as adding four pounds to the rest of the car. This wouldn't make that big of a difference though. If you do not have low profile tires, get some. Also, take into account the whether conditions. Hope this helped.
 

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Yea, that was what I was gonna say. Possibly your wheel/tire combo made your final drive ratio a little longer, thus killing your 1/4 mile. Hey, when you goto the track, try putting ur 15's back on ur front along with like some 205/55's. Hehehe. Do that, watch your 1/4 mile times and 60' times go down down down down.
 

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Think physics guys. Smaller diameter of a circle spins faster but travels a smaller distance. Example: Our planets. or as a matter of fact think 21 speed bicycles.
 

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yeah the wheels

and are all the exterior factors the same? Sametrack, temperature,humidity,altitude? etc. Just a thought but maybe the cai started making up for its negative low end, and if u did like a "half mile" run you would have improved . like some said before the only way to tell is put back your stock
 
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Discussion Starter · #7 ·
Hmmm, well I'm not really into racing so I'm not gonna kill myself that my car isn't faster yet. I'm sure that once I get my new exhaust and a Stage II chip I'll improve. When I go to the track I don't want to start stripping my car or anything like that. I just go to have fun and see what my car is gonna run like when I'm on the street. I don't go unless I have some new mod that I want to test out.

Also, DV8 can maybe answer this or someone else who has proven experience at the track. What is the best way to start in our cars. It seemed like brake torquing wasn't helping, any ideas?
 
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Discussion Starter · #8 ·
BTW, thought I should mention that I still do have low profile tires. My wheel radius shouldn't have changed and I don't think that my 17's are probably that much heavier than my stock 15's.
 

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Life Ruiner
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LEgEnD4LiFe said:
brake torqueing=bad for tranny

i think i read somewhere on the forum that someone actually broke their transmission from doing it??

after reading that, i dont do it anymore. esp with 98 k on it.
I beg to differ, brake torqueing is not bad at all. your just loading up the torque converter to 2000RPM then releaseing the brake with the gas pressed, its nothing like tranny dropping from reverse or neutral.

you should get a feel for the track, odds are that you were nervous, it could of been hot, there was a big headwind, etc.

start off the line in d3 with the brake pressed and the gas floored, just before the tree starts to count, on the last yellow let go of the brake.

Ive got 17" and there are no advantages over my 15".

i need more info on you old runs versus your new runs like: 60ft times and Trapspeed MPH

defenitly get the stage 2 bayou it really helps out with the series of mods you have.

~Hybrid
 
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Discussion Starter · #11 ·
Will the Stage II Bayou chip help even though I just have a CAI and no Exhaust yet. I plan on getting an exhaust, but I want to make sure that the chip won't hurt my speed between now and then. Also, is there anyway to get one for $250 still, becuase there is no way that I'm gonna pay $400 considering the kind of trouble that people have been having.

DV8, so you think that Brake Torquing is advantageous? Whenever I brake torque it feels like it takes my car so long to start picking up. Once I let off the brake the car just feels like it sits there and is sucking in air or something. Also, I can't even chirp my tires when brake torquing. I seem to have more power when I just slam on the gas while lifting my foot off the brake at the same time, due to the fact that I can get my tires to chirp that way so it seems like there must be more power. Also, why do you say to keep it in D3? It's not going to shift till I get to 98MPH or so anyways and I'm finishing at like 89-90MPH.

Later on today I'll post some more details about the 60ft times etc... BTW, it seems like the conditions today would have been the best for racing. We raced from 3PM - 11PM and my best times were early on. They progressively got worse until I ended with a 15.9something.
 

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502MotorSports.com
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I would say that you would want to do what DV8 said...I was not fortunate to get more than ONE run at the track on Test n Tune day...my track conditions were horrible, and I ran on my 18's, full interior, spare tire, stools, etc in the trunk, and had to piss like a **** racehorse after sitting in the car for about 3 hours waiting to get my FIRST run. I think I ran a 15.9....my 60' was too high, and the Prelude stripped of interior ran a 15.56...and he was spraying. I know my bad time was also due to my loss of traction going into 2nd gear...I span my tires from 0-40, which sllowed me down, big time. I didnt care at the time, I was hot, had to go to the restroom and the track was a mess..a Supra ran into the wall on my side 45 minutes earlier, so grease and oil and coolant still on the track made for bad conditions. My advice is to try again, with your 17's, and try to stage as far back as possible so you will have more room to take off. Holla back.
 

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I don't want to sound ignorant but high 15's 1/4mile times with typeII coupe is disappointing. It's even more disappointing running high 15's with mods. No offense to anyone.
 

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legendtype2 said:
I don't want to sound ignorant but high 15's 1/4mile times with typeII coupe is disappointing. It's even more disappointing running high 15's with mods. No offense to anyone.
alot depends on track conditions, driver, etc.

Like I said in my post, I was pretty ticked off since I spent 3+ hours waiting to get my first and only run. Got there at 12:45 to meet with Club Lexus, teched by 1:00pm, got in line, got to the stage light around 4:15. Needless to say I was thirsty, and had to go, but I couldnt get to a restroom since they were pretty inaccessible from where I was, and didnt want to lose my position in line, esp since we were PACKED in, and inching up. I will be back soon. I will post some better times...been practicing, and paying attention...plus NickD and DV8 have posted some important info regarding launching. Traction makes a big difference on your ET.
 
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Discussion Starter · #15 ·
Yeah, traction does make a huge difference, I just wish that I could figure out the best way to take off, because I think that that is my biggest problem. I'm gonna run some fuel system cleaner through my car this week. I'm hoping that that will help too, because I'm also getting terrible gas mileage lately.
 

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Your 17" rims and tires are still hurting your times. Even with the same overall diameter, you have to consider that a 17" low profile tire weighs more than a 15" regular tire. And that weight is farthest away from the center of rotation, thus creating more inertia. Even if your 17" combo were to weigh the same as the 15" combo, which I doubt. Look up the weights of 17" low profile tires. They are about 20 to 23 lbs. The weight of the stock sedan 15" rim with 205/60/15 Michelins is around 36~37 lbs. Doing the math, your 17" rim would have to weigh 13~16 lbs just to make even.

I think the bigger rim hurts 60' time the most. I ran at the track with my 17" rim/tire, my 60' time is around 2.5 to 2.6. I didn't brake torque, though. I won't do that until I get my trans cooler installed.

And as others said, track condition is very important. I ran in bad conditions (temp, elevation, etc), and a lot of cars weren't doing so well. This was in Fontana, CA. Everyone said that they were doing better in Pomona.
 
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