rear diff strenth
#21
Melting Slicks
I thought I read that in a Book 'Differentials ID restorations & repair" But I can't find it in there today. I thought it was a bit strange. However it dose say that a Cherokee used a version of the Aluminum D44 IRS and that Honda and Isuzu used them as well. However I think the book is more intnded for the Four wheel Drive Guys they also say that the early D44 IRS (C3) was cast iron.
#22
Team Owner
Sense doesn't even attempt what you ask.
#23
I just hate theese weak rear-ends !, And i truly hate the price on tom´s diff wich leaves many race-interested vette-fans with their original stuff. I even called Tom´s and asked if it wasn´t possible to make a cheaper solution perhaps not for the 1400hp cars but more moderately 800hp or so :-) .... but he WAS NOT Interested....
But what i´ve heard a standard case early diff with following modifications will handle 650hp with slicks.
1. Replace to a Eaton Diff or a Auburn Pro
2. Make rear-end symmetry better with for example "drag-Vette"-kit wich will lighten the stress alot from the whole diff.
3. Replace to 3" half-shafts with 1350 spicers.
4. 1/2" rear wheel-studs
For safety-reasons safety loops are ofcourse a big + !.
Above has been good for 9,80" with a th400 and big block chevy. Good Luck or No, thats still a fact.
This is of great interest tough please keep this topic ALIVE !
But what i´ve heard a standard case early diff with following modifications will handle 650hp with slicks.
1. Replace to a Eaton Diff or a Auburn Pro
2. Make rear-end symmetry better with for example "drag-Vette"-kit wich will lighten the stress alot from the whole diff.
3. Replace to 3" half-shafts with 1350 spicers.
4. 1/2" rear wheel-studs
For safety-reasons safety loops are ofcourse a big + !.
Above has been good for 9,80" with a th400 and big block chevy. Good Luck or No, thats still a fact.
This is of great interest tough please keep this topic ALIVE !
#24
Me thinks you should buy a van, trailer and spare pants! I'm going 9" on my 6-71 400 and that's only pushing 530bhp. It has the benefit of straight line stability, which is quite important when you hit 'Warp' factor!!
Yours sounds awsome
Yours sounds awsome
#25
Le Mans Master
Time to sell off your first born....
I will HAVE to find a cheaper way myself.... I will only have about 550-600 crank hp, no nitrous, TH400.... I think I will try the 3 1/2" have shafts and solid u-joints with the drive shaft loops first....at least that way if it blows, I don't tear the car up.....The only problem with this is when I DO upgrade the inner and outter axles, my $450 half shafts will have to be worked on(flanged added)....
By my tally...
the 12bolt kit is $1750, then the HD axle kit is $1988, plus labor to build it....thats easily $4k in the rear end alone...then once you factor in building the trailing arms(to install the HD outer axles) etc, thats another $1000....add a new spring, bushings, shocks, loops etc.....An easy $6k in the rear end....
When you consider a loaded to the hilt Fab 9" can be built for $3k....this seems VERY ridiculous to me....not much you can do about it though...
I will HAVE to find a cheaper way myself.... I will only have about 550-600 crank hp, no nitrous, TH400.... I think I will try the 3 1/2" have shafts and solid u-joints with the drive shaft loops first....at least that way if it blows, I don't tear the car up.....The only problem with this is when I DO upgrade the inner and outter axles, my $450 half shafts will have to be worked on(flanged added)....
By my tally...
the 12bolt kit is $1750, then the HD axle kit is $1988, plus labor to build it....thats easily $4k in the rear end alone...then once you factor in building the trailing arms(to install the HD outer axles) etc, thats another $1000....add a new spring, bushings, shocks, loops etc.....An easy $6k in the rear end....
When you consider a loaded to the hilt Fab 9" can be built for $3k....this seems VERY ridiculous to me....not much you can do about it though...