IRS in my 89 5.0 GT

EscortSportage · January 31st, 2009, 05:47 PM

what would be the easiest swap for this to be done, from a 03 cobra or the f150 lightning ?

im getting into autocross and open track SCCA / NASA stuff and i really want to my stang to handle, any tips or ideas im want to use maxium motorsports for lots of chassis and suspension

GT347SC · January 31st, 2009, 08:42 PM

Your only option is the Cobra. Lightnings dont have IRS.

Traidmarx · January 31st, 2009, 10:02 PM

thunderbird super coupe is also an option.

Racinjason81 · January 31st, 2009, 10:10 PM

the best way to do it is an 03-04 cobra irs swap.the reason is its the strongest factory IRS that will fit your car.the supercoupe setup is different than a mustang so only the
8.8 centersection will fit,your other option is the 99,01 cobra but that setup isnt quite as durable as the 03-04 irs.

86er · February 1st, 2009, 11:01 AM

thunderbirds I thought had the 7.5 in the irs

White Thunder · February 1st, 2009, 11:14 AM

the old ones did

start looking for a wrecked cobra in junk yards

fateisajester · February 1st, 2009, 11:50 AM

Originally Posted by GT347SC

Your only option is the Cobra. Lightnings dont have IRS.

no sir....

lincoln mark VIII has IRS and tbirds too

Racinjason81 · February 1st, 2009, 12:55 PM

the v6 t-birds had 7.5 irs but the v8s and SCs had 8.8s but that wouldnt work for your swap

WhiteSSP · February 1st, 2009, 01:42 PM

The Tbird IRS will not bolt up for a fox-chassis car. The 99-04 Cobra IRS is a plug and play swap, everything bolts right up with no real heavy modification needed.

And if you're looking to make it handle, keep the solid-axle and start talking to Maximum Motorsports or Griggs Racing. There hasnt been an IRS prepped mustang yet that has been faster than the solid axle cars that are done right.

Haggis13 · February 1st, 2009, 02:53 PM

Originally Posted by WhiteSSP

The Tbird IRS will not bolt up for a fox-chassis car. The 99-04 Cobra IRS is a plug and play swap, everything bolts right up with no real heavy modification needed.

And if you're looking to make it handle, keep the solid-axle and start talking to Maximum Motorsports or Griggs Racing. There hasnt been an IRS prepped mustang yet that has been faster than the solid axle cars that are done right.

I remember many many years ago TBird SC IRS swaps into Foxes. In MM&FF or some such mag. Needed a bit of elbow grease though. Definately almost plug and play with late model IRS though.

I'd keep the solid axle and throw in a tri-link or some such solution.

EscortSportage · February 2nd, 2009, 11:54 PM

i want to use maxium motorsports for like everything, but how can u be serious the the live axle out handles IRS, i find this hard to believe, live axle is old skool technology i would amagine IRS performing hell of alot better, think of all he BMW M3's and evo's and impreza's how could the live axle rear end compare to IRS?

78mach1 · February 3rd, 2009, 12:08 AM

Originally Posted by fateisajester

no sir....

lincoln mark VIII has IRS and tbirds too

that would be your best bet, mark viii are everywhere out where i live.

dblzroracin · February 3rd, 2009, 12:09 PM

You may can find someone that has swapped the IRS out of an 03/04 cobra and just buy the IRS from them. I know alot of people around Memphis has had the swap done in 03/04 Cobras to a live axle and thier old IRS is still sitting around somewhere.

Haggis13 · February 3rd, 2009, 04:16 PM

Originally Posted by EscortSportage

i want to use maxium motorsports for like everything, but how can u be serious the the live axle out handles IRS, i find this hard to believe, live axle is old skool technology i would amagine IRS performing hell of alot better, think of all he BMW M3's and evo's and impreza's how could the live axle rear end compare to IRS?

I'm quite sure that live axle modified Mustangs hold some of the faster track times out there...

flyin ryan · February 3rd, 2009, 04:34 PM

go with one from a terminator cobra like stated above, those guys remove them because they break em and you do know you'll be adding like 400lbs to your car right

GT347SC · February 3rd, 2009, 06:20 PM

Originally Posted by fateisajester

no sir....

lincoln mark VIII has IRS and tbirds too

I was refering to stuff that bolts in. The cobra is the only one he should be looking at unless he wants to do alot of work. He only listed two options anyway, one of which does not have IRS.

WhiteSSP · February 3rd, 2009, 07:23 PM

Originally Posted by EscortSportage

i want to use maxium motorsports for like everything, but how can u be serious the the live axle out handles IRS, i find this hard to believe, live axle is old skool technology i would amagine IRS performing hell of alot better, think of all he BMW M3's and evo's and impreza's how could the live axle rear end compare to IRS?

Because it does.

In general, yes, an IRS is better than a stick axle. However, the IRS in the mustang was designed around a chassis that was designed for a Solid Axle, making it a very compromised design. A properly setup solid axle car will handle amazingly. Bruce Griggs has been proving that since the early 90's.

As far as the live axle comparing ont he race track, it does so quite well. In 2008's Ultimate Track Car Challenge put on by Grassroots Motorsports, there were two solid axle mustangs in the top 10. One of which was on pace to destroy the fastest time of the event before he had an off and broke his car. Ernesto Roco placed 3rd with only one single lap in a solid axle griggs prepped car.

EscortSportage · February 4th, 2009, 06:47 AM

So the live axle is hands down better for autocross, open track, drag, street than IRS...i still cant get that, when was the last time uve seen an indy car is a live axle setup, and the IRS is heavier than the live axle?

EscortSportage · February 4th, 2009, 12:41 PM

im still thinking of converting to IRS, i mean it all sounds good with a beefed up live axle but if u take physics into mind and the geometry of suspension and suspension travel while going around a corner, or even just cruising on the streets, im looking at maxium motorsports things for IRS and you could build up a cobra IRS just like you can the live axle...

Hunt_chevs · February 4th, 2009, 03:23 PM

at best, more of a novelty in your vehicle,... the solid axle drivetrain on these are no slouches as many of these gentlemen stated, you can have quite the solid axle autocrosser with a little money and work

January 31st, 2009, 05:47 PM	#1
EscortSportage Hardcore Enthusiast 1989 Mustang GT 5.0 Join Date: Oct 2007 Location: CT Posts: 2,186 iTrader: 0 reviews	IRS in my 89 5.0 GT what would be the easiest swap for this to be done, from a 03 cobra or the f150 lightning ? im getting into autocross and open track SCCA / NASA stuff and i really want to my stang to handle, any tips or ideas im want to use maxium motorsports for lots of chassis and suspension __________________ Cage Maximum Motorsports Sparco QH/BE Nitto "a huge bad azz motor is nice untill you have to turn or stop"

January 31st, 2009, 10:02 PM	#3
Traidmarx Hardcore Enthusiast 1995 Mustang GT SLOWER THAN OLD PEOPLE FUCK..:-( Join Date: Aug 2008 Location: Roanoke,VA Posts: 2,075 iTrader: 0 reviews	thunderbird super coupe is also an option. __________________ 1995 Mustang GT..4.30's,BBK Longtubes, Off Road X-Pipe,Magnaflow Catback,BBK Intake,BBK Underdrive Pulleys Walbro 255lph pump,accel dizzy,MSD Coil,MSD 8.5 Super Conductors,front sway bar removed, more coming soon.

January 31st, 2009, 10:10 PM	#4
Racinjason81 Hardcore Enthusiast Join Date: Feb 2007 Location: New jersey Posts: 1,559 iTrader: 0 reviews	the best way to do it is an 03-04 cobra irs swap.the reason is its the strongest factory IRS that will fit your car.the supercoupe setup is different than a mustang so only the 8.8 centersection will fit,your other option is the 99,01 cobra but that setup isnt quite as durable as the 03-04 irs. __________________ Heres a real funny video youtube.com/watch?v=ojB7KkaR03I VTEC stands for Very Torqueless Economy Car Honda stands for Hold On Not Done Accelerating 1991 LX 5.0 H/B(T-70 turbo coming soon)

February 1st, 2009, 11:01 AM	#5
86er I Post Entirely Way Too Much Join Date: Nov 2006 Location: Memphis, TN Posts: 7,626 iTrader: 0 reviews	thunderbirds I thought had the 7.5 in the irs __________________ Just a truck 5.4 3v: 264hp 317ft lbs rock stock The "search" button, its not just for porn piecing together the next project faster than your first sexual experience

February 1st, 2009, 12:55 PM	#8
Racinjason81 Hardcore Enthusiast Join Date: Feb 2007 Location: New jersey Posts: 1,559 iTrader: 0 reviews	the v6 t-birds had 7.5 irs but the v8s and SCs had 8.8s but that wouldnt work for your swap __________________ Heres a real funny video youtube.com/watch?v=ojB7KkaR03I VTEC stands for Very Torqueless Economy Car Honda stands for Hold On Not Done Accelerating 1991 LX 5.0 H/B(T-70 turbo coming soon)

January 31st, 2009, 08:42 PM	#2
GT347SC Regular 89 GT, 92 LX Join Date: Nov 2008 Posts: 120 iTrader: 0 reviews	Your only option is the Cobra. Lightnings dont have IRS.

February 1st, 2009, 01:42 PM	#9
WhiteSSP Regular 1989 Mustang GT Join Date: Jan 2009 Location: Norfolk, VA Posts: 72 iTrader: 0 reviews	The Tbird IRS will not bolt up for a fox-chassis car. The 99-04 Cobra IRS is a plug and play swap, everything bolts right up with no real heavy modification needed. And if you're looking to make it handle, keep the solid-axle and start talking to Maximum Motorsports or Griggs Racing. There hasnt been an IRS prepped mustang yet that has been faster than the solid axle cars that are done right. __________________ www.varacers.com -Shawn 1989 Mustang GT - My Garage 1990 Mazda Miata

February 2nd, 2009, 11:54 PM	#11
EscortSportage Hardcore Enthusiast 1989 Mustang GT 5.0 Join Date: Oct 2007 Location: CT Posts: 2,186 iTrader: 0 reviews	i want to use maxium motorsports for like everything, but how can u be serious the the live axle out handles IRS, i find this hard to believe, live axle is old skool technology i would amagine IRS performing hell of alot better, think of all he BMW M3's and evo's and impreza's how could the live axle rear end compare to IRS? __________________ Cage Maximum Motorsports Sparco QH/BE Nitto "a huge bad azz motor is nice untill you have to turn or stop"

February 3rd, 2009, 12:09 PM	#13
dblzroracin Regular 92 Mustang GT vert Join Date: Aug 2005 Location: Memphis, TN Posts: 151 iTrader: 0 reviews	You may can find someone that has swapped the IRS out of an 03/04 cobra and just buy the IRS from them. I know alot of people around Memphis has had the swap done in 03/04 Cobras to a live axle and thier old IRS is still sitting around somewhere. __________________ www.bbandtracing.com

February 3rd, 2009, 04:34 PM	#15
flyin ryan Banned Join Date: Jun 2008 Posts: 3,387 iTrader: 0 reviews	go with one from a terminator cobra like stated above, those guys remove them because they break em and you do know you'll be adding like 400lbs to your car right

February 4th, 2009, 06:47 AM	#18
EscortSportage Hardcore Enthusiast 1989 Mustang GT 5.0 Join Date: Oct 2007 Location: CT Posts: 2,186 iTrader: 0 reviews	So the live axle is hands down better for autocross, open track, drag, street than IRS...i still cant get that, when was the last time uve seen an indy car is a live axle setup, and the IRS is heavier than the live axle? __________________ Cage Maximum Motorsports Sparco QH/BE Nitto "a huge bad azz motor is nice untill you have to turn or stop"

February 4th, 2009, 12:41 PM	#19
EscortSportage Hardcore Enthusiast 1989 Mustang GT 5.0 Join Date: Oct 2007 Location: CT Posts: 2,186 iTrader: 0 reviews	im still thinking of converting to IRS, i mean it all sounds good with a beefed up live axle but if u take physics into mind and the geometry of suspension and suspension travel while going around a corner, or even just cruising on the streets, im looking at maxium motorsports things for IRS and you could build up a cobra IRS just like you can the live axle... __________________ Cage Maximum Motorsports Sparco QH/BE Nitto "a huge bad azz motor is nice untill you have to turn or stop"

February 4th, 2009, 03:23 PM	#20
Hunt_chevs Hardcore Enthusiast 2002 Gt Not Slow Join Date: Aug 2007 Location: SJ-CA, 50-ft elev. Posts: 1,649 iTrader: 1 reviews	at best, more of a novelty in your vehicle,... the solid axle drivetrain on these are no slouches as many of these gentlemen stated, you can have quite the solid axle autocrosser with a little money and work __________________ 2k2 Gt Eibach pro kit, bbk cold air, exhaust, 4.10s, 6k hid's

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