Just got back from the track.Very hot day,but some how poor traction.best 60 foot time 1.99,worst 2.05.Dumping at 5000 seemed to track better,but time and mph suffered.
Dumping at 7000 seemed to spin way to much but netted better times and mph.
Would the car do better with 22-8-13s.
90 crx full interior(2575 lbs with driver)B20 /GSR head with type r head internals.
4.4 final drive (xsi)with jap spec lsd.
Slicks had 11 lbs of air when hot.
All info will be welcome----thanx
ps --lsd makes bad interior noise as soon as you turn steering wheel even
just slightly,could this be part of the problem

 

i personally use the m/t 20/8/14's in my gsr-hatch pull 1.8's on occassion try different launch techniques btw i am jumping @ about 5800

 

More windup more sidewall more bite John@M&H<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LaminaR X &raquo;</TD></TR><TR><TD CLASS="quote">Just got back from the track.Very hot day,but some how poor traction.best 60 foot time 1.99,worst 2.05.Dumping at 5000 seemed to track better,but time and mph suffered.
Dumping at 7000 seemed to spin way to much but netted better times and mph.
Would the car do better with 22-8-13s.
90 crx full interior(2575 lbs with driver)B20 /GSR head with type r head internals.
4.4 final drive (xsi)with jap spec lsd.
Slicks had 11 lbs of air when hot.
All info will be welcome----thanx
ps --lsd makes bad interior noise as soon as you turn steering wheel even
just slightly,could this be part of the problem</TD></TR></TABLE>


Modified by SlicksMH at 8:13 AM 6/24/2003

 

with the type of motor setup you have and the potential power you can make.. I'd think about stepping up to a slick with more sidewall like John said. Look into a 22x8x13 slick.. that will be the next step up for you. those 22x15 just dont have that much sidewall.

Wil

 

I don't think that you're making enough power to need the 22inch tire, I'd try the 20x8x14 with your setup. Maybe you are making lots of power, i don't know, but your car is heavy man. My friends Type-r was running 13.7's on street tires, and with a 22 inch slick it went 14.0's. Then he switched to a 20inch and went 13.2's. That's just my thoughts though.

 

i think ur way confused. use SLICKS TO THEIR POTENTIAL. last yr dumping at 6 grand i pulled 1.8s all day long. now i dump at 8k and pull 1.6/1.7s all day. i think ur clutch is going, theres no way u have enough power to break those tires free. drop the pressure to 8psi b4 burnout and do a proper 2nd gear burnout just till the tires smoke. u should b able to figure it out from there. o yeah i run 22/8/15 MTs also.

 

i run the same tires and although i have yet to run better than a 1.92, i have found that 9-11psi when hot, is sort of a sweet spot.

i usually launch @ around 4500 or so but i am running an F22 w/ 6800 maximum RPM plus, my motor produces a decent amount of torque to pull me out of the hole from such a "low" rpm.

when i cosistantly launch above 5k, i start breaking axles and w/ an open diff i might add.

 

you deff need more sidewall i couldnt do better thna 2.0 on those same slicks , you go to 13's or 14's in that same size you will hit 1.8's all day

 

Thaught your car was lighter than that. Your LSD can be a problem but I've seen better time with stock diff. How do you do your burn out ? I normally do 1.8 60ft with the same slicks as you, lauching at 4500rpm on my puny turbocharged 1.6 SOHC.

BTW, did you check if the slicks were spinning on the rims ? I'm using beadlocks to make sure they don't.

 

i use the 22x8x15 MT slicks and they seem to be holding up for me..

I usually get 1.9s...
I am hoping to drop down to 1.8s.. that should help my 1/4 a bit..

 

I hit consistent 1.75's with M/T 22x8x15.

 

i ran 1.63's w/ the stock dif on those same slicks

 

im not much of a believer in the more sidewall deal. yes it makes sense in a high HP car but in a car thats NA it usually wont have enough power to use the sidewall to its advantage. as i said, last yr i was only pullin 1.8s in my car and at the woodburn event i was next to alot of NA guys that had 22/8/13 inch M@H VS my 22/8/15 MTs and i was still pullin slightly better 60s. i dont know the answer but sounds to me like ur just launching to softly. lauch hard.

 

I launch at 6100rpm, and I hit 1.6's-1.7's all day long. Launch hard, who cares if you break, that's when you know you're hookin up. Don't be scared to break ****, cause that's part of racing. If you are scared then you shouldn't be racing at all.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kwik93si &raquo;</TD></TR><TR><TD CLASS="quote">Launch hard, who cares if you break, that's when you know you're hookin up. Don't be scared to break ****, cause that's part of racing. If you are scared then you shouldn't be racing at all.</TD></TR></TABLE>

damn, sounds damn near like a direct quote from one of my posts quite awhile ago.

 

SOHC on 85 shot + 20x8x14 MT's at 12 psi + 7800 rpm launch = 1.816 60 foot

Next step is 22x8x13's

 

11psi cold is way too much pressure...try 8psi and launch it like a man.

I was lauching @ 6krpm on 20x8x14 and cutting 1.9 60ft.

I plan on lauching at ~8000rpm+ on 23x8x13 on my new setup.

If you aren't breaking parts you aren't trying hard enough...

Suprdave

 

thats basically what i said dave.

speaking of which, when are u gion to get that thing finished. i dont know the exact setup but ive seen bits and pieces here and there on HT. hurry up and quit foolin around.

 

Man, Im a ****** broke ***...

I've been dumpin' all my money into my new shop and overhauling the car with suspension and basically everything else. I'm almost done with the motor...waiting on a new machinist scale to do my claying (broke mine) and then final assembly time. Machine Shops have been laggin' on me hardcore...first it was RS and they didn't do a buncha stuff so I had to get that **** done locally.

Patience My Son...heh

Suprdave

 

ahh broke means nothing, thats what credit is for. i should have another GSR block next week hopefully for my first 2L sleeve job. after that im goin to attempt some 14+:1 pistons either CP, wiseco or JE again. finally get my head off for porting (still havent decided who, portflow or alaniz) and prolly stick with my JUN 3 cams cause so far they have kicked ***.

 

Thanx guys for all the replyes. Ill lower the presure to 8psi and try a second gear burnout.I have run low 1.8 60 foot times,but not often.
PS my car weights over 2500 lbs with me in it and i have run a best et of 12.92@108.When i pull 2.0 60 foots,the car never does better than 13.25@105 mph.
Ill let you know after next outing

 

A correction on the weight of my car.Its 2325 with me in it.
Just got back from the track.Finally some traction.The car was hooking,to bad baro.
pressure was so low.I did 5 passes and the 60 foot times were from 1.88-1.91.
Those 2nd gear burnouts are great,the tires smoke very quickly and the car advances less quickly.
Best et was 13.22@106
13.27@105.9
13.33@105.5
13.37@105.9
13.40@105
dumping clutch at 7000 rpm with 8 psi when hot

 

could u run a breakdown of that timeslip. those MPH should easily put u into the 12s every pass with 1.8s. id b curious to see where ur losin the ET at.

 

I will try to post my slip.Maby I can shed some light.
If i pull an 8.2 in the eight then im assured of a high 12 pass.
I have trouble pulling 8.2s without those all important power
shifts.Last year I had to overhaul my transmission,and its not cheap.
My trans is jap spec,and the gears are just not available.
When i used to power shift it was no problem.
Now I just shift quick,but with low air in the slicks,the car sits back
on those type of shifts.I usually pick up from 2-3 tenths with the
power shifting,but too hard on the trans.
This might explain the non 12 passes.
Also your car is much lighter than mine(2150),with no driver.

 

that power shifting crap is for the fast and the furious. u shouldnt lose that much momentum doin regular shifts. my car when i was runnin 12.6s was 2000lbs not much lighter than ur car is currently. 8.2s all day long still should net 12s. even on misshifts i was runnin 13.3s@107 still.