Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

How much power can a built 8" handle.

Thread Tools
 
Search this Thread
 
Old 02-03-2008, 07:03 PM
  #1  
65Raven65
3rd Gear Member
Thread Starter
 
65Raven65's Avatar
 
Join Date: Mar 2007
Location: Houston, TX
Posts: 748
Default How much power can a built 8" handle.

I've got a 9" in a donor car also, but its going to be a pain to get it out, store it, move the donor car after its out, etc etc....
I'm planning on about 400 hp, will the 8" handle that if its well built?
Thanks
65Raven65 is offline  
Old 02-03-2008, 08:58 PM
  #2  
BULLITT GT 390
1st Gear Member
 
BULLITT GT 390's Avatar
 
Join Date: Mar 2007
Location: Kiss-my-assvill florida
Posts: 149
Default RE: How much power can a built 8" handle.

it can what gears are you going to run? a stock one no.....
BULLITT GT 390 is offline  
Old 02-03-2008, 09:34 PM
  #3  
Mustangdemon67
4th Gear Member
 
Mustangdemon67's Avatar
 
Join Date: Aug 2004
Location: Los Angeles, CA
Posts: 1,115
Default RE: How much power can a built 8" handle.

someone on here posted pics of their broken axle from about 330 whp (8in). i forgot who it was though.
Mustangdemon67 is offline  
Old 02-03-2008, 09:46 PM
  #4  
andrewmp6
6th Gear Member
 
andrewmp6's Avatar
 
Join Date: Oct 2006
Location:
Posts: 8,162
Default RE: How much power can a built 8" handle.

I think that was nick dodgestang define built 31 spline axles which diff you have etc etc.
andrewmp6 is offline  
Old 02-03-2008, 11:08 PM
  #5  
65Raven65
3rd Gear Member
Thread Starter
 
65Raven65's Avatar
 
Join Date: Mar 2007
Location: Houston, TX
Posts: 748
Default RE: How much power can a built 8" handle.

Probably go with 3.73 or similar, whatever is close and available. It will have a 5 speed.


My '71 Chvelle made 450hp, and my built 10 bolt little 7.8" (I think) held up. I can't believe it would be impossible to make a Ford 8" hold 400hp.
[align=left] [/align]
65Raven65 is offline  
Old 02-03-2008, 11:12 PM
  #6  
65Raven65
3rd Gear Member
Thread Starter
 
65Raven65's Avatar
 
Join Date: Mar 2007
Location: Houston, TX
Posts: 748
Default RE: How much power can a built 8" handle.

ORIGINAL: andrewmp6

I think that was nick dodgestang define built 31 spline axles which diff you have etc etc.

Strong enough to handle 400hp. Aftermarket parts in a stock Ford 8" housing. Sorry, maybe thats a local term. (built)
65Raven65 is offline  
Old 02-03-2008, 11:41 PM
  #7  
67mustang302
6th Gear Member
 
67mustang302's Avatar
 
Join Date: Apr 2007
Location: California
Posts: 10,468
Default RE: How much power can a built 8" handle.

I'm running around 300+rwhp through an 8" with street tires. No problems. The only thing stock though are the axles, and with the Richmond Powertrax being pretty solid and made from a titanium alloy, it doesn't flex, which may have an impact on how precisely the axles stay where they're supposed to. Misalignment will kill things faster than power will. You flex metal and it'll break faster.
67mustang302 is offline  
Old 02-04-2008, 11:35 AM
  #8  
cprstreetmachines
4th Gear Member
 
cprstreetmachines's Avatar
 
Join Date: Aug 2007
Location: Socal
Posts: 1,235
Default RE: How much power can a built 8" handle.

Depends 100% on your driving. The axles suck, and if they're replaced, the caps are the weakness. Dropping the clutch, spinning the tires, then letting them grab is mainly what breaks them. The shock of power is what kills them.
cprstreetmachines is offline  
Old 02-05-2008, 09:00 PM
  #9  
65Raven65
3rd Gear Member
Thread Starter
 
65Raven65's Avatar
 
Join Date: Mar 2007
Location: Houston, TX
Posts: 748
Default RE: How much power can a built 8" handle.

Thanks for the response everybody. So, the general concensus is that it will hold the power, as long as the parts are all upgraded, and its driven in a halfway sane manner?
For what its worth, the car will never see slicks, and usually be granny shifted. But realistically the motor will make 350-400hp.
65Raven65 is offline  
Old 02-05-2008, 09:03 PM
  #10  
dodgestang
5th Gear Member
 
dodgestang's Avatar
 
Join Date: Nov 2004
Location: Insanity
Posts: 2,176
Default RE: How much power can a built 8" handle.

ORIGINAL: Mustangdemon67

someone on here posted pics of their broken axle from about 330 whp (8in). i forgot who it was though.
They were 28 splines in a 9 inch and when they went they took everything else with them
dodgestang is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
lincolnshibuya
V6 (1994-2004) Mustangs
1
10-06-2015 08:45 AM
KingRando
2005-2014 Mustangs
5
10-02-2015 08:06 AM
ChampInSD
5.0L GT S550 Tech
13
10-02-2015 04:55 AM
1Bad71
New Member Area
5
09-30-2015 07:37 PM
Drastang
4.6L (1996-2004 Modular) Mustang
2
09-30-2015 03:48 AM



Quick Reply: How much power can a built 8" handle.



All times are GMT -5. The time now is 10:30 PM.