drag setup help for s13 and s14 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Silvia479whp · 12-07-2010, 08:32 PM

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 · 12-08-2010, 01:04 PM

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

s14freak93901 · 12-08-2010, 03:49 PM

ditch the flex coilovers.

ej2civic · 12-08-2010, 04:03 PM

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 · 12-08-2010, 04:11 PM

^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 · 12-08-2010, 04:13 PM

Quote:

Originally Posted by 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.

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 · 12-08-2010, 04:21 PM

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 · 12-09-2010, 01:19 AM

thanks u guyz
i will try to hit them up

Jmac39 · 12-09-2010, 02:17 AM

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

1.48 60
YouTube - Johnnys 240

thefro526 · 12-09-2010, 06:42 AM

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 · 12-11-2010, 10:12 AM

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

thefro526 · 12-11-2010, 10:19 AM

Quote:

Originally Posted by s14freak93901

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 · 12-11-2010, 04:23 PM

Quote:

Originally Posted by Jmac39

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

1.48 60
YouTube - Johnnys 240

whats your setup? motor/tran/etc.

slow92 · 12-11-2010, 04:51 PM

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 · 12-14-2010, 11:58 PM

Quote:

Originally Posted by Flicktitty

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

12-07-2010, 08:32 PM	#1
Silvia479whp Zilvia Junkie Join Date: Mar 2008 Location: Porterville Age: 36 Posts: 543 Trader Rating: (5) Feedback Score: 5 reviews	drag setup help for s13 and s14 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?

12-08-2010, 01:04 PM	#2
Ali 556 Zilvia Junkie Join Date: Sep 2006 Location: Far Far Away...... Posts: 359 Trader Rating: (0) Feedback Score: 0 reviews	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 __________________ '95 S14 Se With HKS's - BREMBO's - ES/SPL.

12-08-2010, 04:03 PM	#4
ej2civic Leaky Injector Join Date: Jun 2006 Location: Northern CT Posts: 105 Trader Rating: (0) Feedback Score: 0 reviews	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. __________________

12-09-2010, 06:42 AM	#10
thefro526 Nissanaholic! Join Date: Feb 2008 Location: New Jersey Posts: 1,813 Trader Rating: (8) Feedback Score: 8 reviews	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. __________________ http://thefro526.wordpress.com/ Deto International

12-11-2010, 04:51 PM	#14
slow92 Zilvia Junkie Join Date: Jun 2008 Location: NV Posts: 423 Trader Rating: (16) Feedback Score: 16 reviews	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. __________________ Sr22 in the works

12-08-2010, 03:49 PM	#3
s14freak93901 Zilvia Member Join Date: Apr 2005 Location: salinas,ca-fort bragg,nc Age: 36 Posts: 203 Trader Rating: (0) Feedback Score: 0 reviews	ditch the flex coilovers.

12-08-2010, 04:11 PM	#5
homeslicej2 Zilvia Member Join Date: Aug 2008 Location: Adairsville, GA Age: 41 Posts: 152 Trader Rating: (0) Feedback Score: 0 reviews	^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.

12-08-2010, 04:21 PM	#7
s14freak93901 Zilvia Member Join Date: Apr 2005 Location: salinas,ca-fort bragg,nc Age: 36 Posts: 203 Trader Rating: (0) Feedback Score: 0 reviews	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.

12-09-2010, 01:19 AM	#8
Silvia479whp Zilvia Junkie Join Date: Mar 2008 Location: Porterville Age: 36 Posts: 543 Trader Rating: (5) Feedback Score: 5 reviews	thanks u guyz i will try to hit them up

12-09-2010, 02:17 AM	#9
Jmac39 Join Date: Nov 2007 Location: Richmond KY Age: 40 Posts: 42 Trader Rating: (3) Feedback Score: 3 reviews	I use cheap megan streets with 26x8.50x15 mt slicks and it does the job very well. 1.48 60 YouTube - Johnnys 240

12-11-2010, 10:12 AM	#11
s14freak93901 Zilvia Member Join Date: Apr 2005 Location: salinas,ca-fort bragg,nc Age: 36 Posts: 203 Trader Rating: (0) Feedback Score: 0 reviews	totally forgot about squat. positive your rear camber so when you launch it squats to 0.