how fast with 7.5 rearend - Ford Mustang Forums : Corral.net Mustang Forum
Go Back   Ford Mustang Forums : Corral.net Mustang Forum > General Tech Forums > Drag Racing

Corral.net is the premier Ford Mustang Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 02-10-2005, 09:08 PM   #1
Registered User

Trader Feedback: (0)
 
Join Date: Jan 2004
Posts: 11

how fast with 7.5 rearend

like it says whats the fastest anyone's run with the 7.5. i have one thats a posi so i thought i might try it for a while. does it save any horsepower compared to the 8.8?
dt79 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 02-11-2005, 01:43 PM   #2
Registered User

Trader Feedback: (4)
 
Join Date: Jun 2000
Location: Baytown, TX USA
Posts: 3,921

Garage
Don't know for sure, I've heard of guys running bottom 11s on them, most likely with Autos. My cousin is installing some GT40 Y heads, exhaust, E303, weiand intake, 650 holley, and tuning. We're going to see how far we can push his 85GT with the stock 7.5 rear and stock gears with a stock T-5
__________________
Carl S.: 417", Yates C3s, Edelbrock 2828, Dominator, Powerglide, 4.10s, 3100 lbs raceweight. 1.27 60' 5.470@127 nitrous on 275/60 Mickeys in Ultra trim
2014 Ruby Red GT Auto, bone stock for now
http://i269.photobucket.com/albums/jj77/carlrenee1/sigpic1-1.jpg
White90GT is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-11-2005, 01:51 PM   #3
Registered User
 
AnthonyDalrymple's Avatar

Trader Feedback: (0)
 
Join Date: Jul 2003
Location: Salt Lake City, Utah
Posts: 4,486

Quote:
Originally Posted by White90GT
Don't know for sure, I've heard of guys running bottom 11s on them, most likely with Autos. My cousin is installing some GT40 Y heads, exhaust, E303, weiand intake, 650 holley, and tuning. We're going to see how far we can push his 85GT with the stock 7.5 rear and stock gears with a stock T-5
Same thing I've heard; but have not seen in person. I would think, just like using an 8" versus the more popular 9" rear diff in the "older days; the 8" get's the job done up to about 300rwhp. Probably the same situation with the 7.5 versus the 8.8" More power than that.... It becomes a crap shoot.
__________________
'89 LX 'vert. 331 stroker, TKO600, 11.52@118.93mph; new motor in & looking forward to better times!
AnthonyDalrymple is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-16-2005, 12:20 AM   #4
Registered User

Trader Feedback: (0)
 
Join Date: Feb 2005
Location: Northern Minnesota
Posts: 52

I was wondering the same thing. I have a 7.5 T/L rear out of an 86 Turbo Coupe I am going to install in my Futura to start out with. Later it will be replaced by a 9".
Unless I have been ill informed, aren't the axles the same as 8.8 axles? The units look kind of puny, but I am not putting drag radials or slicks on right away, so I am hoping it will give me a summer's worth of use.
Anyone who has beat on one of these things hard, please chime in!
Thanks- L.W.
MONTsterLW is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-16-2005, 03:43 PM   #5
Registered User

Trader Feedback: (0)
 
Join Date: Feb 2005
Location: Climax, Mn Yes it's a real place
Posts: 16

Had one in my 83 gt DONT dump the clutch at 5,000 took off 5 teeth on the ring gear.
forsale is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-16-2005, 06:47 PM   #6
Registered User
 
red89coupe's Avatar

Trader Feedback: (31)
 
Join Date: Feb 2003
Location: Ohio
Posts: 3,292

see sig.. I just added nitrous and it has taken the 75 shot with no problems so far It will be taking a 150 shot and we will see what happens but I think the reason mine wont break is beacuse I have a 8.8 ready to be swaped in when it does go
__________________
Turbonetics 62-1 and Chinese headers on stock junk ran good... B&G kit with a 67mm, P heads and explorer intake should be even better.
red89coupe is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-16-2005, 06:53 PM   #7
Registered User
 
red89coupe's Avatar

Trader Feedback: (31)
 
Join Date: Feb 2003
Location: Ohio
Posts: 3,292

Quote:
Originally Posted by MONTsterLW
I am hoping it will give me a summer's worth of use.
Anyone who has beat on one of these things hard, please chime in!
Thanks- L.W.
I have BEAT THE CRAP out of mine. it just seems to take it. I have broke 2 trannys,1 imput shaft and 1 second gear cluster but the 7.5 is fine so far. 100 timeslips,10,000 miles and 1000 miles of driving like I was trying to break it
I dont dump the clutch and I dont hook for crap with street tires. with STICKEY TIRES IT WILL BREAK.
__________________
Turbonetics 62-1 and Chinese headers on stock junk ran good... B&G kit with a 67mm, P heads and explorer intake should be even better.
red89coupe is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-17-2005, 07:59 AM   #8
Registered User

Trader Feedback: (161)
 
Join Date: Nov 2001
Location: Pensacola Florida
Posts: 7,198

Thats the main thing, if you put tires to it or dump the clutch alot, it WILL break fast! I come from F-Bodys, they come with a d@mn 7.5 stock and it's a JOKE with a stick shift. If you can keep the clutch or tires spinning it will last a little while, take the fusable link out of the equation and blam!
Speeds8erM-1 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-17-2005, 08:37 AM   #9
Registered User

Trader Feedback: (0)
 
Join Date: Dec 2004
Location: Marinette, WI
Posts: 5

I broke the one in my old ranger with a 2.9 busted every tooth of the ring gear.
__________________
Nick L.
Nick L is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-22-2005, 08:54 PM   #10
Registered User
 
90 Crustang LX's Avatar

Trader Feedback: (12)
 
Join Date: Nov 2004
Location: Scandia Pennsylvania
Posts: 565

What gears came stock in the 7.5's?
__________________
1990 Mustang GT, T56, 425ci Windsor, 225AFR's, Megasquirted; previously 5.0, 1.5 Kenne Bell
1977 Ford F250 351m, 4 speed, 2wd
1972 Honda CB350 Four, 1978 CB750F
Current project: 1931 Model A Ford tudor sedan, rat rodish with 2.3 turbo 5 speed
90 Crustang LX is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-22-2005, 11:37 PM   #11
Registered User
 
red89coupe's Avatar

Trader Feedback: (31)
 
Join Date: Feb 2003
Location: Ohio
Posts: 3,292

Quote:
Originally Posted by 90 Crustang LX
What gears came stock in the 7.5's?

3.45 came in mine and seems to be pretty common.
__________________
Turbonetics 62-1 and Chinese headers on stock junk ran good... B&G kit with a 67mm, P heads and explorer intake should be even better.
red89coupe is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-23-2005, 12:54 AM   #12
Registered User
 
onesillynotch's Avatar

Trader Feedback: (1)
 
Join Date: Jul 2003
Location: Rockland, NY
Posts: 2,007

they last a while if they dont have a trac-loc..
__________________
1988 Notch...2.5T
5 lug cobra brakes, full MM CO, MM PH, MM TA, MM FLSFC, SN95 A-Arms.
onesillynotch is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-23-2005, 01:02 AM   #13
Registered User
 
red89coupe's Avatar

Trader Feedback: (31)
 
Join Date: Feb 2003
Location: Ohio
Posts: 3,292

Quote:
Originally Posted by onesillynotch
they last a while if they dont have a trac-loc..

I dont know
my trac-loc has seen many many passes and alot of street/highway miles. but I get NO traction,(2.1 60 foot ) NO dumping the clutch,NO crazy burnouts or anything like that.

now that I said that next time out its flying out the cover
__________________
Turbonetics 62-1 and Chinese headers on stock junk ran good... B&G kit with a 67mm, P heads and explorer intake should be even better.
red89coupe is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Old 02-23-2005, 01:44 AM   #14
Registered User
 
Rather B. Racin''s Avatar

Trader Feedback: (2)
 
Join Date: Apr 2000
Location: Southeast Mo.
Posts: 178

Running a 7.5 w 4.10s and lincoln locked its been bullet proof for several years now on slicks.
__________________
If it wasn't for the last minute I'd never get anything done.

www.jsiskphotos.com
Rather B. Racin' is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 02:47 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.5.2
© 2010-2011 Corral.net

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.