drag setup help for s13 and s14

[Silvia479whp]

i have s13 hatch with rb26dett making 370whp on dyno yet
went down to the track 60 2.2 on stock sus..
n i have s14 rb25 making 402whp on dyno yet
i cant even leave the hole good

tires used on s13 were 26/8/15 m and h dot
tire used on s14 275/40/17 Hoosier r6

i have tein flex coilover on s14, s13 sum cheap maxspeed aka nex ?

now i need help on getting both of my car to hook

what kinda tire do u guy recommended ? i m looking into Mt et 26/10.5/15
need help choosing a wheel that would fit both of my car

both of the car have rb25det tranny,
rear gear used on s13 is 4.63, s14 stock with kazz 2 way


what kinda suspension do u guy recommend ? help me plz
and what kinda gearing on rear ends?

[Ali 556]

S14 with 2JZ-GTE + Percision billet 6765 and 6-spd and 15x9 welds with 26x9x15 M.T slicks

STOCK 130+ k rear coils

9.1 @ 151mph

good luck with your 2.6L of fury :squintd:

[s14freak93901]

ditch the flex coilovers.

[ej2civic]

get mickey thompson ET street or ET street radials. They make them in both your sizes and are awesome tires.
I have a similar problem my old KA with tein flex and street tires 255/40-17 best 60' was 2.02.

I see guys on KA-t getting 1.5-1.8 60' on ET street radials with no drag suspension.

[homeslicej2]

^What S14freak said. Most coilovers for 240's are too stiff for good drag launches bc they are meant to cater to the drift crowd. In general for RWD drag vehicles, you want a soft rear spring with shocks that compress easily and have minimal rebound. For the front you'll want shocks/struts that have harder compression and softer rebound. This allows the back end to "squat down" and the front end to "stand up". The front setup helps to keep the back end down by making it harder for the front to settle, leaving the back pushed down longer. This is just one thing you can do. There are so many tricks to good launches and hooking up on a track. Best thing to do is check with local drag racers and shops. You'll learn a lot from them.

[homeslicej2]

get mickey thompson ET street or ET street radials. They make them in both your sizes and are awesome tires.
I have a similar problem my old KA with tein flex and street tires 255/40-17 best 60' was 2.02.

I see guys on KA-t getting 1.5-1.8 60' on ET street radials with no drag suspension.This too. Good tires with proper inflation (less psi than for the street and dependent on track & ambient temps and vehicle weight) make a world of difference. My previous post is more for a dedicated drag car.

[s14freak93901]

slapping on wider/better tires won't help. you need to tune your suspension. it's not hooking because the rear end is too stiff.
hit up mazworx's. they specialize in drag 240's. they are legit.

[Silvia479whp]

thanks u guyz
i will try to hit them up

[Jmac39]

I use cheap megan streets with 26x8.50x15 mt slicks and it does the job very well.

1.48 60
YouTube - Johnnys 240 (http://www.youtube.com/watch?v=SrjcXW2w1II)

[thefro526]

A lot of the Coilovers I've found for the S-Chassis seem to be way too stiff to get a halfway decent launch with.

Apparently Fortune auto has coils with a special option with revised dampening for Drag Racing now. I'd check those out.

Also, a little bit of positive camber may help too. I believe S13's (and S14's are close to this I'd imagine) gain somewhere around .75*-1* of negative camber for every inch as the suspension travels (squat) in the rear.

[s14freak93901]

totally forgot about squat. positive your rear camber so when you launch it squats to 0.

[thefro526]

totally forgot about squat. positive your rear camber so when you launch it squats to 0.

It's a bit more difficult than that.

First he would have to launch and some how record how much his suspension actually Squatted.

From there he'd have to find out how much negative camber he gained with that amount of squat, then add that amount of positive camber so that at full squat the car zeros out.

[Flicktitty]

I use cheap megan streets with 26x8.50x15 mt slicks and it does the job very well.

1.48 60
YouTube - Johnnys 240 (http://www.youtube.com/watch?v=SrjcXW2w1II)
whats your setup? motor/tran/etc.

[slow92]

It looks like it hooks pretty good. Have you ever thought about giving up on the coilovers. Most drag guys run coilovers up front and put a drag shock and spring set up in the rear that allows more travel in the rear suspension. Too, you could try taking more air out of your tires. My car really squats but I run agx's in the rear with some sportline springs. At least with this set up you can adjust how stiff or soft your shocks are. Just a thought. Plus remove your rear sway bar.

[Jmac39]

whats your setup? motor/tran/etc.

sr20det built
bc 272 cams
full race manifold with gt3076 86ar (25psi)
sard 850cc
stock tranny with act hd 6 puck
nistune ecu