28" slick on Cobra IRS

MyGT · January 15th, 2010, 08:21 PM

I've got a set of 15x8 Draglites w/ 4.5 BS. Can I run a 28" slick??

HBK_2007 · January 16th, 2010, 11:47 AM

hate to ask a dumb question but are u talking 28" wide or tall?

MyGT · January 16th, 2010, 11:53 AM

Originally Posted by HBK_2007

hate to ask a dumb question but are u talking 28" wide or tall?

Tall lol

drazga97 · January 16th, 2010, 12:07 PM

if it fits im sure it would be really close not to mention breaking a halfshaft on the launch.

MyGT · January 16th, 2010, 12:26 PM

Originally Posted by drazga97

if it fits im sure it would be really close not to mention breaking a halfshaft on the launch.

It's all about tire compound with the IRS.

drazga97 · January 16th, 2010, 12:36 PM

either way idk theres just something that erks me about the irs on these cars i cant get used to it. cant wait to get a 9" or a built 8.8.

mpe331lx · January 16th, 2010, 04:13 PM

Originally Posted by drazga97

if it fits im sure it would be really close not to mention breaking a halfshaft on the launch.

Really? Slicks and hard launches are not what break the halfshafts (atleast not commonly). Axle hop is what MURDERS them. Drag radials and street tires are prone to axle hop. Slicks and DOT slicks atr bias ply instaed of a radial. They absorb a lot more of the shock on the launch then a DR or street tire does.

The Cobra IRS can take VERY hard launches as long as there is hop.

Originally Posted by MyGT

It's all about tire compound with the IRS.

It's more related to the tire type then the compound

Originally Posted by drazga97

either way idk theres just something that erks me about the irs on these cars i cant get used to it. cant wait to get a 9" or a built 8.8.

Regardless of how much the IRS can really take, I completely agee with you. I swapped the IRS out of mine probably within the first month of ownership.

Besides, its an 85lb weight savings to ditch the IRS. These cars need as much weight off as possible!

C MY 4D · January 16th, 2010, 04:29 PM

how wide of a tire are you planning on? I have 28x10.50 with a 5.5 backspacing. The fender lips are rolled and its close.

drazga97 · January 16th, 2010, 05:03 PM

Originally Posted by MyGT

It's all about tire compound with the IRS.

im not comparing the abilities of a slick vs regular tire. i just cant stand the irs in these cars i have yet to launch mine hard yet. i dont plan to either on the 555rs i just ordered, im gonna wait for my solid rear.

forcefedcobra · January 16th, 2010, 05:47 PM

I currently run a 26x10.5x16 and plan to step up to a 28" this spring. 5k rpm launches with no issues. Just need to get some bags for the rear springs to help with the irs squat.

January 15th, 2010, 08:21 PM	#1
MyGT Hardcore Enthusiast 2004 Mustang GT 13.1@105 Join Date: Oct 2007 Location: Houston Posts: 2,237 iTrader: 7 reviews	28" slick on Cobra IRS I've got a set of 15x8 Draglites w/ 4.5 BS. Can I run a 28" slick?? __________________ 2009 Super-Stangs Fantasy Football League Champion Thanks Brees!

January 16th, 2010, 11:47 AM	#2
HBK_2007 Genibus Nitito Canus 2009 Ford Mustang GT Join Date: Jan 2008 Location: Wyoming Posts: 2,832 iTrader: 0 reviews	hate to ask a dumb question but are u talking 28" wide or tall? __________________ Red 1996 GT: JLT RAI, Steeda Underdrive pullies, Stewart Waterpump; nothing to brag about Black 2009 45th aniverary edition GT 5 speed: K&N CAI, BBK Twin 62mm Throttle Body, BBK Underdrive Pullies, SLP Loudmouth

January 16th, 2010, 12:07 PM	#4
drazga97 Noob Slayer 2004 Mustang GT 13.82 @ 101.09 Join Date: Oct 2007 Location: New Jersey Posts: 2,458 iTrader: 1 reviews	if it fits im sure it would be really close not to mention breaking a halfshaft on the launch. __________________ 2003 Black Cobra 10th Anniversary 2.8 Kenne Bell Mammoth LC - Built SRA - T56 - E85 - Spray - Stock Longblock - True Forged Mach 5s 2004 Silver GT 5 speed - SOLD MM Cobra Club Member# 97

January 16th, 2010, 12:36 PM	#6
drazga97 Noob Slayer 2004 Mustang GT 13.82 @ 101.09 Join Date: Oct 2007 Location: New Jersey Posts: 2,458 iTrader: 1 reviews	either way idk theres just something that erks me about the irs on these cars i cant get used to it. cant wait to get a 9" or a built 8.8. __________________ 2003 Black Cobra 10th Anniversary 2.8 Kenne Bell Mammoth LC - Built SRA - T56 - E85 - Spray - Stock Longblock - True Forged Mach 5s 2004 Silver GT 5 speed - SOLD MM Cobra Club Member# 97

January 16th, 2010, 04:29 PM	#8
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	how wide of a tire are you planning on? I have 28x10.50 with a 5.5 backspacing. The fender lips are rolled and its close. __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

January 16th, 2010, 05:47 PM	#10
forcefedcobra Enthusiast 2003 SVT Cobra Join Date: Nov 2008 Location: oklahoma Posts: 535 iTrader: 0 reviews	I currently run a 26x10.5x16 and plan to step up to a 28" this spring. 5k rpm launches with no issues. Just need to get some bags for the rear springs to help with the irs squat.

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