IRS into a '94 GT

[procharge94]

Just thought I would drop in and mention that I swapped an IRS into my '94 GT this past weekend. The swap was MUCH easier than I anticipated. The only real issue thus far has been running down a soft line to complete my rear brake lines. Other than that, it was relatively simple. I have yet to drive the car due to some wonderful clutch engagement/disengagement issues, but hopefully tonight all of that will be fixed. What I am the most excited about is the ability to play with my rear toe-in and negative camber!

I purchased koni SA's with 10" 600'lb coilover springs for the rear, urethane control arm and subframe arm bushings, aluminum diff bushings, and a rear bump steer kit is in the immediate future. Can anybody think of anything else I am missing on the rear?

Matt

[blue00gt]

I'm a big fan of Maximum Motorsports. Looks like they make some new parts for the IRS:
http://www.maximummotorsports.com/irs-asp.asp

[procharge94]

Originally Posted by blue00gt

I'm a big fan of Maximum Motorsports. Looks like they make some new parts for the IRS:
http://www.maximummotorsports.com/irs-asp.asp

My car is equipped with all sorts of maximum parts. That is actually where I ordered the bushings from.

Matt

[fastmax]

Yes MM does make suspension parts for the IRS. The IRS is good for cornering. I am also a big fan of MM parts.


Matt

[Duncan]

what car did you get the irs out of

[Vortec99GT]

Originally Posted by procharge94

I purchased koni SA's with 10" 600'lb coilover springs for the rear, urethane control arm and subframe arm bushings, aluminum diff bushings, and a rear bump steer kit is in the immediate future. Can anybody think of anything else I am missing on the rear?

Matt

Just out of curiousity, what model are the SA's that you got? Sports, 30 series, etc......? Also what was in the decision to get 600lb springs in the rear? I have the Griggs kit all the way around on my car (which i dislike btw) but it has 475lb springs in the rear its way to soft. Many people have been telling me that 475 was way to stiff..... as i was contemplating doing a 550 in the rear and a 500 in the front. Your thoughts?

[procharge94]

Originally Posted by Duncan

what car did you get the irs out of

It came out of an '03 Cobra. The guy was looking for a solid axle for the drag strip and I just happened to have one containing what he was looking for.

Originally Posted by Vortec99GT

Just out of curiousity, what model are the SA's that you got? Sports, 30 series, etc......? Also what was in the decision to get 600lb springs in the rear? I have the Griggs kit all the way around on my car (which i dislike btw) but it has 475lb springs in the rear its way to soft. Many people have been telling me that 475 was way to stiff..... as i was contemplating doing a 550 in the rear and a 500 in the front. Your thoughts?

If I remember correctly the SA's were 30 series, but I could be wrong. It was years ago and I purchased them used.

As for why I chose 600 lb springs for the rear? Mainly because it was available at a great price and I've heard of people running higher spring rates on the IRS. I matched this with 450 lb front coilover springs. I ran this setup at Sebring at about 50% effort (head gasket failure) and was surprised at how well the combination matched.


P.S. - Sorry for the incredibly delayed response. I had a slight leave of absence.