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Old 04-28-2008, 04:26 PM   #21 (permalink)
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Excalibur, In my opinion it is because radials work best at their prescribed pressure. It's not a slick that gets a softer sidewall with less pressure. This notion that 20psi gives more traction is beyond me. At this low pressure the tire cups and looses contact patch, which means less traction.
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Old 04-28-2008, 04:37 PM   #22 (permalink)
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Originally Posted by mike07si View Post
Excalibur, In my opinion it is because radials work best at their prescribed pressure. It's not a slick that gets a softer sidewall with less pressure. This notion that 20psi gives more traction is beyond me. At this low pressure the tire cups and looses contact patch, which means less traction.
I thought he was on stock michelins? Just sounded like a really high number to me. I know what you mean about finding the correct pressure. You want a flat contact patch.
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Old 04-28-2008, 07:43 PM   #23 (permalink)
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Originally Posted by K20z3 Civic Si [PHONG] View Post
Dang, I wish I got one of those haha. I guess they just starting handing those out this year. I got mines like mid last year. Congrats on the awsome trophy!
You should go back and win one yourself.
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those are good times and the trophy is awsome dude congrats
Thanx...
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what yr m3 was it ?
I have no idea. sorry, i'm not a bmw fan.

EDIT: just checked on Wikipedia, it looks like that M3 was "1992-1999 E36"
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Old 04-28-2008, 08:11 PM   #24 (permalink)
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You should go back and win one yourself.

Thanx...


I have no idea. sorry, i'm not a bmw fan.

EDIT: just checked on Wikipedia, it looks like that M3 was "1992-1999 E36"
yea... the later ones wouldve been unbeatable....

Great performance mate
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Old 04-28-2008, 08:40 PM   #25 (permalink)
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nice times man

get and exhaust and see if you can net some slightly better times :)
I'm kool with the stock exhaust for now.
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How are you pulling off those times with those mods and such a high tire pressure in the front?
What's wrong with high tire pressure in the fronts??
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Old 04-28-2008, 08:40 PM   #26 (permalink)
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yea... the later ones wouldve been unbeatable....

Great performance mate
Thnks....
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Old 04-28-2008, 08:48 PM   #27 (permalink)
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I'm kool with the stock exhaust for now.

What's wrong with high tire pressure in the fronts??
Well, if it's too high, it also decreases the contact patch. You would only have contact on the center as opposed to the outside if it was too low.
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Old 04-28-2008, 11:58 PM   #28 (permalink)
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Well, if it's too high, it also decreases the contact patch. You would only have contact on the center as opposed to the outside if it was too low.
Yes, I understand what you're saying, thats why i set the psi on the rears higher than the fronts. Most people think that if the psi is too high, it will result in wheel spin or slower launch when its actually the driver who causes wheel spin. At the track I looked at other cars and alway notice that their front/rear tires are low on air. When I asked, I get response like 20psi, 25,psi, etc. When I tell them I have my fronts set at 45psi, they go and look at me like I'm stupid. Then they go when they lose to me.

My front tires only need enough flat contact to the ground for a good launch. Notice how I can still pull a 2.1 60' with 45psi in the fronts. The main reason why I set the fronts to 45psi is for faster acceleration, better top end, to save gas Notice how my trap speed is high
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Old 04-28-2008, 11:59 PM   #29 (permalink)
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Originally Posted by Bboy_Burst View Post
Yes, I understand what you're saying, thats why i set the psi on the rears higher than the fronts. Most people think that if the psi is too high, it will result in wheel spin or slower launch when its actually the driver who causes wheel spin. At the track I looked at other cars and alway notice that their front/rear tires are low on air. When I asked, I get response like 20psi, 25,psi, etc. When I tell them I have my fronts set at 45psi, they go and look at me like I'm stupid. Then they go when they lose to me.

My front tires only need enough flat contact to the ground for a good launch. Notice how I can still pull a 2.1 60' with 45psi in the fronts. The main reason why I set the fronts to 45psi is for faster acceleration, better top end, to save gas Notice how my trap speed is high
What is the recommended tire pressure on our tires?
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Old 04-29-2008, 12:21 AM   #30 (permalink)
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Originally Posted by Excalibur View Post
What is the recommended tire pressure on our tires?
Honestly, I don't know. I'm still experimenting I would said, just set your fronts to a certain psi that you feel comfortable with and try launching at different rpm. Get as close to getting wheel spin as you can without actually spinning your wheels. Your tires will screech a little bit, but that's ok, as long as you don't start spinning like crazy.

Last edited by Bboy_Burst; 04-29-2008 at 02:08 AM.
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Old 05-03-2008, 03:49 AM   #31 (permalink)
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Was suppose to dyno on 4/29, but the dyno guy was in the hospital so i had to reschedule for 5/3. will update with results.

EDIT: They reschedule me again Now its going to be on 5/6. If I don't get to dyno that day, then taking my money somewhere else.

Last edited by Bboy_Burst; 05-04-2008 at 02:56 AM.
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Old 05-04-2008, 03:44 AM   #32 (permalink)
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What is the recommended tire pressure on our tires?
I think its around 32 psi.
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Old 05-04-2008, 11:10 PM   #33 (permalink)
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that is funny how the tire pressure can create good launches
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Old 05-04-2008, 11:12 PM   #34 (permalink)
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nice times
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Old 05-04-2008, 11:15 PM   #35 (permalink)
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were you power shifting? gas floored the whole time shifting?
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Old 05-05-2008, 12:29 AM   #36 (permalink)
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Did you do any weight reduction...that mph is way up there. Track must be down hill...lol...for only a custom made intake and race header...the spacer isn't going to help that much.

not trying to hate...just strange. When I had the same mods I ran a 14.7@95mph with a 2.2 60ft. I know conditions are different there...low 50's at night versus the mid 70's I was in here in San Antonio...I also know the track in Sacramento is 100 ft in elevation. The track here in San Antonio is 625ft.

San Antonio Raceway

Sacramento Raceway

And correction doesn't bring my time down any... .0013
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Old 05-05-2008, 02:54 AM   #37 (permalink)
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Originally Posted by Ainokea_Si View Post
that is funny how the tire pressure can create good launches
Yea, I didn't think it was possible either.
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nice times
Thanks...
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were you power shifting? gas floored the whole time shifting?
No, I was power shifting only on Runs #2 & 3.
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Old 05-05-2008, 03:11 AM   #38 (permalink)
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Did you do any weight reduction...that mph is way up there. Track must be down hill...lol...for only a custom made intake and race header...the spacer isn't going to help that much.

not trying to hate...just strange. When I had the same mods I ran a 14.7@95mph with a 2.2 60ft. I know conditions are different there...low 50's at night versus the mid 70's I was in here in San Antonio...I also know the track in Sacramento is 100 ft in elevation. The track here in San Antonio is 625ft.

San Antonio Raceway

Sacramento Raceway

And correction doesn't bring my time down any... .0013
I did no weight reduction; I had to leave the spare on because I didn't want to risk having a flat/blown tire on the road.

Hmmm.... Well, I ran consistent 14.5 - 14.6 STOCK, with 14.4 being my best. I ran at 2 different track and the times were consistent. Tracks are: Infineon Raceway & Sacramento Raceway. If my STOCK car is faster than your MOD car, then it must be the elevation. I don't know, I've beat many rsx-s(with mods) and Si(with mods) when I was stock. I've seen Si's barely breaking into 14s, leaving me scratching my head saying "it is really that hard to run 14s ??"

Last edited by Bboy_Burst; 05-05-2008 at 03:13 AM.
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Old 05-05-2008, 11:40 AM   #39 (permalink)
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Hey, nice runs with the victory!!!

Curious, did you start in 2nd gear just enough to roll and then spray?
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Old 05-05-2008, 01:45 PM   #40 (permalink)
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I did no weight reduction; I had to leave the spare on because I didn't want to risk having a flat/blown tire on the road.

Hmmm.... Well, I ran consistent 14.5 - 14.6 STOCK, with 14.4 being my best. I ran at 2 different track and the times were consistent. Tracks are: Infineon Raceway & Sacramento Raceway. If my STOCK car is faster than your MOD car, then it must be the elevation. I don't know, I've beat many rsx-s(with mods) and Si(with mods) when I was stock. I've seen Si's barely breaking into 14s, leaving me scratching my head saying "it is really that hard to run 14s ??"
I guess it's just location then...I know I'm not a bad driver...I've drag raced many times at this track. I guess locations like yours and people that I see get the same numbers as you over in NJ must be perfect temps and zero humidity? It is pretty humid here. I don't think it's possible for us to get the times you guys get. Best time I got that was close to that was with my EP3 when I had the k20a2, kpro, i/h/e and hit a 14.1 with a 101mph...but it was damn cold that day.

Or maybe I'm just doing something wrong while shifting. I feel like I have to leave the gas down as I shift...if I don't, it usually has that drive by wire hesitation between 2nd and 3rd if I don't do that.
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