What equal's a better 60'/Qtr mile time

[cobrasvtcoupe25]

Simple question:

What would get me (Mods in Sig) a better 60'/Qtr mile time for a rear DR set up?

A 17x9 (275/40/17) or 17x10.5 (315/35/17)


I got a 1.777 with a 17x8 Hoosier DR. This is the 2nd set of wheels I'm currently working on right now and need more info from you guys. Thanks!

1999 Cobra SVT Mod List

Engine
JLT 9" Filter
01 Cobra intake tube
Ported & Polished Lower 01 Cobra Intake
3/8 Intake Spacer
Can Diablo Tuner (Street Tuned)
SLP Line lock

Exhaust
JBA Shorties (Custom Ported)
Bassani Catted X-pipe
SLP Catback w/ Bassani Race Mufflers round (Custom)

Drivetrain
2003-2004 Cobra Clutch
Fidanza Billet Aluminum Flywheel
FRPP Alum D/S
Stifflers 99-04 Driveshaft Safety Loop
31 Spline Eaton tru-trac Diff
FRPP 4.56's
31 Spline Mosers
3" ARP Studs
CHE SRA Brace
Trick Flow Diff Cover
Pro 5.0 Shifter

Suspension
Eibach Pro-Kit
MM LCA's
MM FLSFC's
Steeda UCA's
KYB 8-Way adjust. Struts/Shocks



-Mike

 

[Bite u]

A big n little setup with some stiff wall slicks, a good 6-6500 rpm launch... Good set of adjustable shocks all the way around. N some bracing/ stiffing of the rear suspension if that hasn't been done already...

With enough suspension and setup you could prolly get it to hook on some 17" drag radials, but being n/a and need to launch at a high rpm, drag radials don't have enough give an 17" tires don't have enough sidewall to take the launch you need.

I was able to run roughly the same time as you on some 15" nittos 555r's but could never really launch hard (4.10's) always around 4-4500 and had to slip it just right. To hard she'd spin, to soft she'd bog.

Now I'm on some 26x8.5x15 Stiffwall good year slicks and even at 5-5500 it's hooking to hard and bogging the car... Us n/a guys really really need to launch at about 6500 to keep the rpms turning... But if your like me I don't like the idea of that, but u want them times that's what has to b done!

Ask svt Camr 98 n/a svt n all the fast n/a guys what they launch at

6k or above or you will b stuck in the 1.7x range

 

[Bite u]

Oh n also, being your n/a the wider tire will actually hurt you more than help I'd think, being 300 wheel or so. I vote for getting it to hook on a smaller/ skinnier tire

 

[cobrasvtcoupe25]

Mod list added to the top. (In original post)

A big n little setup with some stiff wall slicks, a good 6-6500 rpm launch... Good set of adjustable shocks all the way around. N some bracing/ stiffing of the rear suspension if that hasn't been done already...

With enough suspension and setup you could prolly get it to hook on some 17" drag radials, but being n/a and need to launch at a high rpm, drag radials don't have enough give an 17" tires don't have enough sidewall to take the launch you need.

I was able to run roughly the same time as you on some 15" nittos 555r's but could never really launch hard (4.10's) always around 4-4500 and had to slip it just right. To hard she'd spin, to soft she'd bog.

Now I'm on some 26x8.5x15 Stiffwall good year slicks and even at 5-5500 it's hooking to hard and bogging the car... Us n/a guys really really need to launch at about 6500 to keep the rpms turning... But if your like me I don't like the idea of that, but u want them times that's what has to b done!

Ask svt Camr 98 n/a svt n all the fast n/a guys what they launch at

6k or above or you will b stuck in the 1.7x range

Oh n also, being your n/a the wider tire will actually hurt you more than help I'd think, being 300 wheel or so. I vote for getting it to hook on a smaller/ skinnier tire

Wow, thanks for all the great info. I'll run a 17x9 over a 17x10.5 if I have to run that set up.

What would be the best rear tire for me a 15x8 or 15x10? What are you running? Thanks!

 

[mustang john]

15x9 or 10 rim with a 28x10.5 stiff wall slick. Good enough for my sig pic.

 

[Mr Patience]

15X10 with 26x10 stiff wall slicks was good for 1.48 when I was NA with 316 rwhp.

 

[Bite u]

I have a 15x8 race star wheel with a Goodyear 26x8.5x15 slick. With 4.56's n 8 total passes on the setup I managed the best in my sig. N 1 1.69 60' but I have still yet to launch the car at 6-7k.... 5-5500 is as high as I go, n she still bogs.

But I agree with mr. Patience... 26" tire if staying n/a, 28" is just too much tire for our low hp n low tq 281's to power.

 

[Bite u]

15X10 with 26x10 stiff wall slicks was good for 1.48 when I was NA with 316 rwhp.

How'd u launch her

 

[Mr Patience]

How'd u launch her

6-7k...slight slip of the clutch not a dump.

 

[99MystiC]

For N/A guys a 26x10.5x15 worked best. Ive hit 1.46 on that setup with Strange all around with 300 hp. That was through a converter with a about 4500 rpm launch with a 5500 stall.

 

[Mach828]

Best i managed was a 1.65 with a 6k+ dump and 26 8.5 15 slicks. 4.10s and 312hp

 

[Blake04]

Due to you power level I'd say go with the smaller size.