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Dec 29, 2009 | 11:46 PM

#21

ESG-642T

Buyer Beware

Joined: Oct 2007

Posts: 3,586

The unfortunate part about IRS is that, since the mustang suspension is basically unchanged since 74-04 it was never meant to go into a mustang. (like it is in the vette for instance) So its basically a hack job by ford. And you can make the solid axle handle better with money.

Dec 30, 2009 | 08:29 AM

#22

Blainestang

2nd Gear Member

Joined: Jul 2006

Posts: 379

From: FL

Quote:

Originally Posted by jthorn9

Increases overall weight 200-250lbs.

The Solid Axle is lighter, but not THAT much lighter.

Quote:

Originally Posted by TheCarConnection

The Cobra IRS arrives already assembled and aligned at Ford's River Rouge Mustang factory in Dearborn, Michigan. Ford even uses the same machine to lift it into place that the solid-axle Mustangs use. The IRS assembly weighs about 80 pounds more than the solid-axle setup on the Mustang GT, but it allows a 125-lb reduction in unsprung suspension weight. To compensate for the heavier rear end, the engineers lightened the front end by 95 pounds, providing the 1999 Cobra with an improved 55/45 percent weight distribution, compared to last year's 57/43 percent.

Another important note is that the IRS reduces unsprung weight significantly, as well.

Quote:

Originally Posted by ESG-642T

And you can make the solid axle handle better with money.

Then you can mod the IRS, though.

Dec 30, 2009 | 07:43 PM

#23

JUSTA6

Thread Starter

2nd Gear Member

Joined: Sep 2009

Posts: 253

From: maryland

here we go with the irs vs. solid debate

Dec 30, 2009 | 09:33 PM

#24

jthorn9

The Godfather

Joined: Sep 2005

Posts: 15,480

From: Temple, Texas

More parts for the IRS than SRA, apparently you havn't looked at your 95 and back 5.0 selection of parts, it's HUGE!!! And pretty much all interchangeable.

Sorry for the weight screw up, I could of swore the complete IRS assembly adds about 200lbs in total over a regular SRA, but I could be wrong.

Yea, the IRA vs SRA is a debate, but in short, I'd chose a solid built IRS over a SRA any day.

Dec 30, 2009 | 10:56 PM

#25

JUSTA6

Thread Starter

2nd Gear Member

Joined: Sep 2009

Posts: 253

From: maryland

so you personally would rather have a bullitt proof irs than a straight axel?

Dec 30, 2009 | 11:14 PM

#26

neo8222

4th Gear Member

Joined: Nov 2007

Posts: 1,701

From: Florida

for my v6 im going IRS cause i want to turn it to autocross, after marine corp when i get my cobra im putting a 9 inch in that so a TT or 2.8L+ supercharger won't blow it up (yes entire drive line will be forged ad built up im no idiot lol) so really depends on the application.