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Author
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Topic: Need some advise 8.8 vs 9
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YellerStang
Journeyman Posts: 2
From: Ontario Canada
Registered: Jul 2004
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posted 07-23-2004 09:38 AM
 
OK...here are the questions before I go out and drop the cash, which i have no problem with...providing there is a advantage from one or the other.For the last 2.5 years i am lucky to have put 250-300miles on it per summer. The car i am begining to work on is a 94 Mustang GT, and will be built for 80% Strip..and rarely but 20% Street. The car has stock 8.8 rear end, ..now i am wondering if i should stay with it, and adding a detroit locker 33spline axles, C-clip eliminators, etc etc...or i can get a Ford 9" direct bolt in from strange in Chicago IL with detroit locker 35spline etc etc. The question is there any advantage having the 9 over the 8.8
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steve'66
Gearhead Posts: 9835
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 07-23-2004 10:23 AM
The 8.8 is more efficient.The 9" is easier to swap gears. I'd upgrade the 8.8 and use it.  SteveW
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Bloose
Gearhead Posts: 888
From: Milwaukee, WI
Registered: Dec 2001
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posted 07-23-2004 09:34 PM
I'd go with the 8.8.B-loose
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wildfire466
unregistered
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posted 07-24-2004 12:58 AM
Agree 8.8 way to go. If your gonna put mass power to them then you can have the axle tubes welded to the center section.Uses less hp then 9! Les ------------------
http://www.geocities.com/wildfire1mustang/
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Buster
Gearhead Posts: 1821
From: Hurricane alley
Registered: May 2002
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posted 07-24-2004 06:53 PM
...but there's nothing like a 9" Ford in the rear. I've got a 1985 SVO that has a 7.5 rear that I'm going to swap it out for a 9". I could go with a 8.8" but I might wont to make some power later on. What kinda ET's does it run?
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TomP
Gearhead Posts: 6376
From: Delta BC Canada
Registered: Dec 99
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posted 07-25-2004 09:59 PM
The 8.8 has been proven in 1500hp cars, how much power do you really want anyways?
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JCQuinn@work
Gearhead Posts: 998
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 07-26-2004 10:38 AM
One factor, as has been mentioned, is the ease of changing ratios with a 9 inch. Of course that requires having a spare pumpkin but it is an important feature to some people. Another consideration is the much greater ratio selection with a 9 inch.John
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Buster
Gearhead Posts: 1821
From: Hurricane alley
Registered: May 2002
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posted 07-26-2004 05:38 PM
quote:
Originally posted by TomP:
The 8.8 has been proven in 1500hp cars, how much power do you really want anyways?
Want or afford, lol.
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Bloose
Gearhead Posts: 888
From: Milwaukee, WI
Registered: Dec 2001
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posted 07-26-2004 07:28 PM
quote:
Originally posted by JCQuinn@work:
One factor, as has been mentioned, is the ease of changing ratios with a 9 inch. Of course that requires having a spare pumpkin but it is an important feature to some people. Another consideration is the much greater ratio selection with a 9 inch.John
Also, a 9" is about the easiest to install gears in. Not only can you do it with the pumpkin out of the car, but the way you set pinion depth is super easy as well. On top of that, with the pumpkin out the bearing preload adjusters on the carier are very easy to access. So, even without a spare pumpkin the 9" is easier to do gears in. The question becomes, how often will you need to change gears? If I already had a 8.8 I would stick with it. It uses less power and is plenty strong. I went with a 9" because I found one that was a direct bolt in for a good price. HTH,
B-loose
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wildfire466
unregistered
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posted 07-26-2004 10:44 PM
What happened to YellerStang ?? Must have left the building?Well here ya go! Read this, http://www.superstang.com/horsepower.htm Anyone want a "9" now? Les ------------------
http://www.geocities.com/wildfire1mustang/
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n2oMike
Gearhead Posts: 3058
From: Spencer, WV
Registered: Jan 2001
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posted 07-26-2004 11:31 PM
I don't see anything seriously bashing the Ford 9" rear. A decent lesson in inertia, but that's about it.I saw the AOD is a serious power hog, but anyone in the late model mustang world knows that. 5-speed mustangs totally trash AOD cars at the track. For 99.99% of hotrods out there, any difference in power transmission between the 8.8 and 9" is very insignificant. I'll take the 'mechanic friendly' 9" anytime. my $0.02 ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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wildfire466
unregistered
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posted 07-28-2004 01:01 AM
I'll guess I'll have to wait and see? By the way what is the weight difference between the 9 and 8.8?
Les 
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http://www.geocities.com/wildfire1mustang/
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