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#1 |
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Newbie
2000 V6 Mustang
Join Date: Mar 2009
Location: In da middle of da sea
Posts: 44
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99 Cobra IRS rear end or beef up 7.5 stock?
I have a chance to pick up a 99 cobra IRS rear end with 3.27 gearing with a little of 70K miles on it for $400.00.
I would like to change to 3.73 and detroit T-loc (or is a loc in there already?)..is it worth it? Or should I just get a t-loc and gearing for my 7.5? Is that a good deal? I don't plan on getting bigtime horsepower, so I think I can get away with beefing up the 7.5, but is this a good price and oppurtunity to do that swap? what do you guys think?
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2000 V6 Atlantic Blue GT Clone True Duals Flowmaster 40's originals custom "H" pipe Headers Eibach Drop Custom tuned w/SCT X3 and a lot more..... Saving for my NEW EDGE GT |
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#2 |
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Hardcore Enthusiast
2003 V6 Mustang
Too long@Too slow
Join Date: Oct 2008
Location: NC
Posts: 2,672
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well, you dont even need an 8.8 in rear end until you go forced induction, but a t-lok and gears will run over $400 after you get it installed, and you should be able to install the 9" rear end on your own. the 9" will have a t-lok, and a detroit tru trac isnt very streetable, so a t-lok is advised if youre not going to make too much power.
its a very good price, but youll just be having extra weight that could be avoided. but the final decision is up to you
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#3 |
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Premium Member
3.9L V6
Join Date: Apr 2007
Location: Portland, TN
Posts: 20,970
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if i can recall from talking to cobra guys around here...they prefer a GT rear end if they wanted to get a 8.8 over the cobra rear set-up...something about the difference between drag vs track racing....i don't know for sure, but i thought this might spark an idea and give ur thread a bumb
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[SIGPIC][/SIGPIC] 6k HIDs - Rear Sway Bar - Mac Prochamber - Goodridge Gstop SS Lines - Lots of Visual Fun - Go Fast Mods (no point in buying...it's a v6) Want to see your car as art...ask me how |
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#4 |
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[8MINUS2]
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Yep, cobra rear end is better for people who are going to auto-x and road course. And it will require you to change your exhaust also.
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![]() Hi, You can call me Kyle |
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#5 |
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Hardcore Enthusiast
2003 V6 Mustang
Too long@Too slow
Join Date: Oct 2008
Location: NC
Posts: 2,672
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ya ive heard that too, something like the 9" irs doesnt launch as well as the 8.8" solid live axle.
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#6 |
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Hardcore Enthusiast
2003 V6 Mustang
Too long@Too slow
Join Date: Oct 2008
Location: NC
Posts: 2,672
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i didnt even think about that, that will run you a couple hundred more, which basically makes the 9" irs not worth it at all on a low power v6.
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#7 |
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[8MINUS2]
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9" ?
I thought we were talking about an IRS.
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![]() Hi, You can call me Kyle |
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#8 |
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Newbie
2000 V6 Mustang
Join Date: Mar 2009
Location: In da middle of da sea
Posts: 44
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Yeah..
I never really heard much about IRS rear's. Only swapping out for GT rear ends, so I have no idea what is expected. He was also going to include the catback for the axle, so I guess the exhaust my existing exhaust might have to be modified. Ah...I think I might just stick with my 7.5 and gear it to 3.73 and t-loc her. BTW..is the IRS 9" rear end???...DAYUM!!!
__________________
2000 V6 Atlantic Blue GT Clone True Duals Flowmaster 40's originals custom "H" pipe Headers Eibach Drop Custom tuned w/SCT X3 and a lot more..... Saving for my NEW EDGE GT |
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#9 |
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[8MINUS2]
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Irs = 8.8
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![]() Hi, You can call me Kyle |
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#10 |
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Hardcore Enthusiast
Modded V6
Join Date: Sep 2006
Location: Mukilteo WA
Posts: 1,445
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How much power do you plan on making?
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![]() 1999 e46 328i BMW - Daily Driver 2001 SVT Cobra - Project 1995 v6 vert - SOLD 1996 v6 vert - SOLD 1995 v6 vert #2 - SOLD 1995 GT - SOLD 1997 v6 coupe - Parting |
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#11 | |
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Zoolander
04 Cobra #2260/3768 1/820
Join Date: Sep 2005
Location: Va Beach
Posts: 7,570
Blog Entries: 1
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The IRS is better for handling. So if you want it to be a car that handles better than your average mustang you can go the irs way, but if you plan on drag racing it keep a solid axle. The IRS is known for wheel hop in Cobras especially the 03-04 which can all sorts of problems. Now granted if your not looking for tons of power you probably won't be thinking of the power range of the 03-04 Cobras. Not saying they have a lot, but just saying that might be out of the range your looking at. |
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#12 |
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Hardcore Enthusiast
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Dont go irs...and if you dont plan on a lotta power keep the stock rear
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2000 V6 vert Mac LT headers, Mac O/R H-pipe, Mac CAI, ASP 25% underdrive pulley(r.i.p), SCT tune, 8.8 rear and 4.10 gears. |
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#13 |
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Hardcore Enthusiast
1989 LX Coupe
7.1@99mph
Join Date: Jan 2009
Location: Texas
Posts: 1,151
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IRS > 8.8 solid > 7.5 solid
IRS hooks better on the street IRS hooks better on the track (when setup properly) IRS ride quality is TONs better. I know. I traded my solid for an IRS. I made over 650-700rwhp and its still together. Stock axles, stock Posi, IRS brace at a minimum, and poly bushing if you can. FOr your application, you can probably just to IRS brace and springs. It will hold a lot and keep the axle hop down. |
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#14 |
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Newbie
2000 V6 Mustang
Join Date: Mar 2009
Location: In da middle of da sea
Posts: 44
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I don't plan on going any higher with the horsepower then what my stock engine with headers and CAI can push out.
I guess makes more sense to keep my 7.5. So I think I might just T-loc and 3.73 the rear end.
__________________
2000 V6 Atlantic Blue GT Clone True Duals Flowmaster 40's originals custom "H" pipe Headers Eibach Drop Custom tuned w/SCT X3 and a lot more..... Saving for my NEW EDGE GT |
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#15 |
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Hardcore Enthusiast
2003 V6 Mustang
Too long@Too slow
Join Date: Oct 2008
Location: NC
Posts: 2,672
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wow, its is 8.8, i wonder where i got 9 from
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#16 | |
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Premium Member
3.9L V6
Join Date: Apr 2007
Location: Portland, TN
Posts: 20,970
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__________________
[SIGPIC][/SIGPIC] 6k HIDs - Rear Sway Bar - Mac Prochamber - Goodridge Gstop SS Lines - Lots of Visual Fun - Go Fast Mods (no point in buying...it's a v6) Want to see your car as art...ask me how |
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#17 |
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Hardcore Enthusiast
1989 LX Coupe
7.1@99mph
Join Date: Jan 2009
Location: Texas
Posts: 1,151
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91 LX. upper/lower control arms, 3.73s, built Windsor, 5500rpm launch, solid, NO A/C, No backseat, lightened.
1.69 60ft on 16" ET streets. 99 GT, Full weight +IRS, A/C, back seat, 3.55 gears, no transbrake, leaving at 2300-2400, no boost till almost the 60ft mark...heavy... 1.73 60 on the same ET street from 3 years ago. Ill take the IRS any day. AND I know some 1.5 60 ft IRS cars...stock save for a brace. |
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