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Dissapointing Quarter Mile

cordiapower
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cordiapower Collaborator

cordiapower

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I went to dragstrip last night and managed dissapointing time of 13.8s, 109mph (175km/h)...car is r33 with bigger turbo (its T-57) making 347hp atw ON 15psi, and i expected at least low 13s...traction was shit 60 foot 2.478 sec, with shit trampio tyres at the back 18 inches 265 wide, tyre pressure at 40psi (stupid me checked today tyre pressure)...what do you reckon the car should do with this mph, and what launch methods u using, i managed best 60ft without much throttle at take off and whenever i upped the revs i couldnt do better time than 2.6 60foot...i noticed as well that gear stick was sticky on second run, i needed to push really hard few times to get it in third gear, still beat wrx hehe...what could the reason be? i suspect when car was brought here from japan while compliancing all the fluids have been changed except gearbox oil so it could be too old?

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skyman Enthusiast

skyman

Posted
Posted

i have 225rwkw and got a 13.5 at 109mph... 60 foot 2.3 on 235/45/17

then the next week went back (same set up) and managed 13.1 at 110mph

then went back and got 12.71 at 111mph 60 foot of 1.93 on the same tyres...

just go back and practice...

by the way i launch at 6 grand

hope that helps

grim32 Community Regular

grim32

Posted
Posted
i have 225rwkw and got a 13.5 at 109mph... 60 foot 2.3 on 235/45/17

then the next week went back (same set up) and managed 13.1 at 110mph

then went back and got 12.71 at 111mph 60 foot of 1.93 on the same tyres...

just go back and practice...

by the way i launch at 6 grand

hope that helps

is that a 6000 dump or u let it ride a little

skyman Enthusiast

skyman

Posted
Posted
is that a 6000 dump or u let it ride a little

i ride it a little. best way to explain would be that i let the clutch go in one fluid motion over a period of about a second or a bit less.

NickR33 Grand Master

NickR33

Posted
Posted

don't hit the limiter it will die in the ass before you grab the next gear... your MPH indicates a mid to high 12 sec pass if you can get the 60ft time down to 2 flat...

I suspect your suspension setup to be at fault... common errors for drag are too stiff a rear suspension and too much neg camber at the rear as the car has been lowered? modern IRS cars don't like to be lowered or you will just fry the insides of your tyres... which is even worse with wide tyres... get some camber adjustment bushes should help get the beast off the line

cordiapower Collaborator

cordiapower

Posted
  • Author
Posted

i have a feeling if i had 50hp less i would have done better time

i have 225rwkw and got a 13.5 at 109mph... 60 foot 2.3 on 235/45/17

then the next week went back (same set up) and managed 13.1 at 110mph

then went back and got 12.71 at 111mph 60 foot of 1.93 on the same tyres...

just go back and practice...

by the way i launch at 6 grand

hope that helps

cordiapower Collaborator

cordiapower

Posted
  • Author
Posted

what revs is rev limiter at

don't hit the limiter it will die in the ass before you grab the next gear... your MPH indicates a mid to high 12 sec pass if you can get the 60ft time down to 2 flat...

I suspect your suspension setup to be at fault... common errors for drag are too stiff a rear suspension and too much neg camber at the rear as the car has been lowered? modern IRS cars don't like to be lowered or you will just fry the insides of your tyres... which is even worse with wide tyres... get some camber adjustment bushes should help get the beast off the line

cordiapower Collaborator

cordiapower

Posted
  • Author
Posted

suspension does feel stiff, its tein not adjustable suspension, no camber kit

don't hit the limiter it will die in the ass before you grab the next gear... your MPH indicates a mid to high 12 sec pass if you can get the 60ft time down to 2 flat...

I suspect your suspension setup to be at fault... common errors for drag are too stiff a rear suspension and too much neg camber at the rear as the car has been lowered? modern IRS cars don't like to be lowered or you will just fry the insides of your tyres... which is even worse with wide tyres... get some camber adjustment bushes should help get the beast off the line

cookie300zx Explorer

cookie300zx

Posted
Posted
I went to dragstrip last night and managed dissapointing time of 13.8s, 109mph (175km/h)...car is r33 with bigger turbo (its T-57) making 347hp atw ON 15psi, and i expected at least low 13s...traction was shit 60 foot 2.478 sec, with shit trampio tyres at the back 18 inches 265 wide, tyre pressure at 40psi (stupid me checked today tyre pressure)...what do you reckon the car should do with this mph, and what launch methods u using, i managed best 60ft without much throttle at take off and whenever i upped the revs i couldnt do better time than 2.6 60foot...i noticed as well that gear stick was sticky on second run, i needed to push really hard few times to get it in third gear, still beat wrx hehe...what could the reason be? i suspect when car was brought here from japan while compliancing all the fluids have been changed except gearbox oil so it could be too old?

it's all about the first 60 foot. 2.5 is way too high to be able to run a low13/high12. i am pretty sure it's just a practice thing. and lower your pressures to about 24 psi. that will help a shiteload :(

skyline Collaborator

skyline

Posted
Posted (edited)

Dump the 18's get some sticky street tyres on some 16's,select correct tyre pressures,change over your susp for some 90/10 's pedders,take the spare and any thing else loose out of the car,i would lightly slip the clutch on initial drop, short change into second,dont drive to limiter in 2nd then give it all you have got in 3rd and hang on,drop into 4th if you need it.The biggest mistake every one makes is using too much 1st and 2nd gear these only result in excessive wheelspin- hence your slow 60ft times,3rd gear is the one that does the driving and you must get up into it as soon as posible!

Anyhow good luck with your future racing (remember is not the out right hp but the way in which you hook up! )

Regards,

SKYLINE (Kym)... B)

Edited by skyline

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