so i autox'd my truck today

[pejsa s-13]

and it didnt do half bad

at the course today my best time was a 71.611and the thing was a beast to controll under steer over steer under steer over steer lolbald front tires, rain, no weight in the bed = fun times.

heres how some of my competitors did

240sx(coilovers good tires)dohc= 67.564240sx(coilovers good tires)sohc= 69.442infinity g20(stock) = 68.932toyota echo(full suspension) = 65.791toyota x runner(stock) = 66.253ford cosworth = 65.236mustang = 73.586

so if any of you can help me

what psi should i run? how much weight in the back? anything else?

[Rev_D21]

I'd beef-up the front end with poly. I'd add a RSB. How you lowered it might have a lot to do with how it handles as well. Didn't you pull a leaf on each side? Sounds fun though, any vid of your runs?

[pejsa s-13]

i didnt pull a leaf i just took the load leaf and put it on top

and whats RSB?

and yea i welded up a camera mount in my truck lol ill have to footage up soon

next im gonna LSD and 4 link it and put a sway bar in the rear

[PEZi]

SUSPENSIONfor the front.... BUSHINGS BUSHINGS BUSHINGS!!! (and camber too)

I'm not sure how the camber curve is on the HB, but if its anything like the 720, you'll need excessive amounts of front camber... the best way of going about this is by marking your tires at events to calculate rollover and by looking at mid turn pics

after about 2 months of this process i got mine right... i run about -4 degrees of camber, and as you can see here the outside wheel goes to 0 while the inside goes for the ride of its life



another big thing is to make sure you aren't hitting the bump stops in the front... its easier than it seems to do under hard cornering... and if you hit them its understeer heaven

for the rear... just make sure you have all of your stiffness still in tact after lowering it the way you did

WEIGHTthis is all class dependent... but to make our trucks more competitive with the low power they make, it better to take weight out of the front or move it further back wherever you can... the closer you can be to 50-50 weight distribution the better, but adding weight is not good for such a sport where you are always changing direction and accelerating

also... with a truck, you'll never really get rid of the oversteer without mega grippy tires (which i will be running come summertime)

in the meantime... its fun getting sideways



TIRES AND PSIas a beginner... you probably don't want to spend too much on tires that you're just gonna tear up... but you will honestly be surprised what tires like Dunlop Direzza StarSpecs and ADVAN Neovas can do... or Hosiers of course if you want a track only set

for your current tires.... you want to set the pressure according to weight bias.... the fronts will need a lot more than the rear

set them close to the max PSI up front and 5-8 lower in the rear.... as they heat up, after each run lower them back down because they will increase each time with the heat...

to figure out the proper PSI for your tires... mark them with chalk and see how much rollover you're getting... you want to use all of the contact patch AND NOTHING MORE

SIDENOTES-4 degrees of camber is not necessarily ideal for street use, however, as long as toe is completely in check, it doesn't really hurt the tires bad... what it does is wear the inside and not the outside (it does not do this faster than normal contrary to popular belief.... that what bad toe alignment does)... as long as you swap the tires from side to side (re-mount so the inside becomes outside etc) then you'll still get the full life out of the tire

removing weight and rearranging weight is not allowed in most classes... doing so will move you into the Prepared and Modified classes

AND SOME QUESTIONSwhat class did you run in? does your region calculate points? if so how did you score?do you have any other numbers that i can compare to? (i typically run the times of the Street Modified cars... evos WRX's and such with engine and suspension mods)

[pejsa s-13]

i ran in the "xp" class it was a group called sd club racing that made their own class i guess?

and as for sti's and stuff

there was a guy just like the ae86 you posted that ran a 58 flatand a bad evo with a load of money into it that ran 61

[LEMHEAD16]

Car set up is important but the driver makes all the difference in the world.

In my VH powered S13 with full suspension and sticky tires, I got beat by a girl who has been Autocrossing a long time driving a stock Mini Cooper.

I let one of the more experienced drivers take my car out and he took 6 seconds off of my best time. Needless to say I Fail at driving. But practice makes perfect.

[PEZi]

there was a guy just like the ae86 you posted that ran a 58 flatand a bad evo with a load of money into it that ran 61

hmmm... with my current setup i'd prolly have been around 62 or so then.... once i get my sticky tires on i'll drop to 59-60 territory (tracks always changing of course)

did you do this in SD??? i want to go there for a national tour event but it costs a lot to get my truck down there for it

p.s. XP is a ridiculous class..... crazy index etc.... allows for basically unlimited engine and suspension mods with fully stripped interior

[Rev_D21]

RSB=Rear Sway Bar.

[pejsa s-13]

there where no xp cars there the club im in bacically just took the xp class over

and i picked up a lsd and some new tires last night and yes i will be doing a rsb =]

[BronkStang]

awesome! got any pics?

i would second the rear swaybar, but it trucks didnt run them and handled great.

yeah these truck need serious camber, it racers used 3-4 degrees

how was it, did the truck roll a lot?

[pejsa s-13]

http://sdclubracing.com/forum/..._id=6

clic here for some pics and video

i have in cab videos im working on right now should be up soon

it felt like it rolled alot

but i had tons o' fun

[pejsa s-13]

heres some pics for ya

[PEZi]

good stuff man.... doesn't look like your camber is quite as bad as the 720's... but it could still use a bit

[pejsa s-13]

im maxed out on my uca i cant go in any further lol

what should i do?

i plan on raising the shock and bumpstop towers about an inch

[PEZi]

wait.... the UCA is different then? cause there's basically no such thing as maxed on mine

[pejsa s-13]

lol then i guess they must be

[PEZi]

hmmm.... on mine the more spacers/shims you add the more negative it goes.... all you need is longer bolts if you want to go further

[pejsa s-13]

well the more shims i add the more positive camber i get? and im already at zero shims

[PEZi]

haha.... nice so yours is normal.... just the opposite of mine

i believe most are like yours... but i know people still do things to get more camber out of them so see if you can find anything on... chevy trucks

i believe those are set up the same... like the S10's and such

[pejsa s-13]

nice ill look into to it

today i started playing around with the lsd stripped it down and got it ready for the transplant

just need some ones help pulling my bed off and big things will happen =]

[goomba1]

u guys are lucky u can even run at AX up here at the closest one to me they don't let trucks run at all. they say its to unsafe.

[PEZi]

u guys are lucky u can even run at AX up here at the closest one to me they don't let trucks run at all. they say its to unsafe.

too unsafe??? yell at someone! send the event chair pics of our trucks... and more specifically tell them to look in the new 2010 rulebook under:Apendix A - Automobile classes - Stock Category - H-StockH-Stock specifically says "All RWD Pickups NOC"where NOC means not otherwise classified

You can also feel free to point them to Appendix A - Automobile classes - Prepared class category - E-Prepared - Datsun/NissanMy truck specifically got added into this class for 2010.... so tell them to shove it up their a**... trucks are legal end_of_story

[pejsa s-13]

hell yea you tell em haha

[BronkStang]

with only springs and shocks at the time, stock tires, i was in street modified, WTF! i think they just wanted to throw me in a class cause it was my first time.

pajsa, ur trucks stance looks good! i had more roll in front and less roll in back with just belltech springs. this made the rear of the truck really tail happy.

hey have you guys ever tried a nose up stance? im thinking about doing this at the next autox. figure its an easy way to get weight on the rear and keep nose dive under braking in check

[pejsa s-13]

that sounds like a good idea im just gonna cut my shock towers and bump stop towers out in the front and raise them about an inch and see how that works