Rear Axle Strength
11-21-07 | 08:58 PM
#1
Thread Starter
*
Joined: Oct 2006
Posts: 235
Likes: 0
From: Green Bay, WI
Rear Axle Strength
So I'm going to be dropping the S5 TII into the FB soon with the TII tranny but I'm worried about the axle. How much power will it handle before I'll snap it? I searched for about 45 mins but could not get some real answers about it.
Just want to know if the ford rear end is would be a good idea even though its a huge expense.
Can someone give me a decent estimate as to how much the axle can take, and make it archive worthy.
Thanks guys
Just want to know if the ford rear end is would be a good idea even though its a huge expense.
Can someone give me a decent estimate as to how much the axle can take, and make it archive worthy.
Thanks guys
11-21-07 | 10:24 PM
#2
FB+FC=F-ME
Joined: Jul 2004
Posts: 3,353
Likes: 5
From: Rohnert Park CA
Its been covered a million times.
Its all about how you apply the power.If you pop the clutch,drift,drive hard and/or run slicks then you can break the stock rearend with the factory 101HP.Its commonly agreed that the 84-85 units are a bit stronger due to their larger axle shafts,but the 3rd member is basically the same.
If you start with a good condition rearend,give it the best oil and regular attention.....then they can take a lot,for a long time, under high HP applications so long as you dont abuse them.
Ive put 300hp through a stock GSL-SE rear axle for 50K miles and almost 7 years and it had 100K when I got it.Daily driven,not abused but I do use full power and keep her on boil regularly....... 245-17" tires out back.
Basic rule of thumb.....if you stick with the stock TII ECU,your power levels shouldnt exceed what the stock rearend can handle.
Here are my components,torn down last year to replace a noisy pinion bearing.....no worn teeth,no twisted splines.
Its all about how you apply the power.If you pop the clutch,drift,drive hard and/or run slicks then you can break the stock rearend with the factory 101HP.Its commonly agreed that the 84-85 units are a bit stronger due to their larger axle shafts,but the 3rd member is basically the same.
If you start with a good condition rearend,give it the best oil and regular attention.....then they can take a lot,for a long time, under high HP applications so long as you dont abuse them.
Ive put 300hp through a stock GSL-SE rear axle for 50K miles and almost 7 years and it had 100K when I got it.Daily driven,not abused but I do use full power and keep her on boil regularly....... 245-17" tires out back.
Basic rule of thumb.....if you stick with the stock TII ECU,your power levels shouldnt exceed what the stock rearend can handle.
Here are my components,torn down last year to replace a noisy pinion bearing.....no worn teeth,no twisted splines.
11-21-07 | 10:57 PM
#3
Thread Starter
*
Joined: Oct 2006
Posts: 235
Likes: 0
From: Green Bay, WI
Its been covered a million times.
Its all about how you apply the power.If you pop the clutch,drift,drive hard and/or run slicks then you can break the stock rearend with the factory 101HP.Its commonly agreed that the 84-85 units are a bit stronger due to their larger axle shafts,but the 3rd member is basically the same.
If you start with a good condition rearend,give it the best oil and regular attention.....then they can take a lot,for a long time, under high HP applications so long as you dont abuse them.
Ive put 300hp through a stock GSL-SE rear axle for 50K miles and almost 7 years and it had 100K when I got it.Daily driven,not abused but I do use full power and keep her on boil regularly....... 245-17" tires out back.
Basic rule of thumb.....if you stick with the stock TII ECU,your power levels shouldnt exceed what the stock rearend can handle.
Here are my components,torn down last year to replace a noisy pinion bearing.....no worn teeth,no twisted splines.
***deleted images for thread sake***
Its all about how you apply the power.If you pop the clutch,drift,drive hard and/or run slicks then you can break the stock rearend with the factory 101HP.Its commonly agreed that the 84-85 units are a bit stronger due to their larger axle shafts,but the 3rd member is basically the same.
If you start with a good condition rearend,give it the best oil and regular attention.....then they can take a lot,for a long time, under high HP applications so long as you dont abuse them.
Ive put 300hp through a stock GSL-SE rear axle for 50K miles and almost 7 years and it had 100K when I got it.Daily driven,not abused but I do use full power and keep her on boil regularly....... 245-17" tires out back.
Basic rule of thumb.....if you stick with the stock TII ECU,your power levels shouldnt exceed what the stock rearend can handle.
Here are my components,torn down last year to replace a noisy pinion bearing.....no worn teeth,no twisted splines.
***deleted images for thread sake***
11-21-07 | 11:11 PM
#4
FB+FC=F-ME
Joined: Jul 2004
Posts: 3,353
Likes: 5
From: Rohnert Park CA
If you want to make more than 300 crank HP,then youll need a standalone ECU and a TO4 family turbo,or better.Once you get into that territory,then money flies out the window anyways,so the cost of the Ford rearend swap shouldnt be an issue.
11-23-07 | 02:26 AM
#5
Hunting Skylines
Joined: Apr 2001
Posts: 3,431
Likes: 4
From: Brisbane, Queensland, Australia.
It all comes down to how you apply the power. I've known people running a lot more than 300rwhp with the standard LSD but if you plan on doing high rpm launches at the track with sticky rubber you're bound to break something. I'm running about 300rwhp with the S3 LSD but I don't abuse it so I should have any issues.
11-23-07 | 08:21 AM
#6
"dont fix it unless its broken"
im BIG on overkill. do it right and go big or go home. i was going to do a 8.8 swap into my car but changed my mind. im certain the 7" can hold up fine if treated properly. iyoure going to be running drag slicks and doing high rpm launches, get the 8.8. if youre not, dont.
i have faith that with the moser axles the rigidity of the stocker is beefed up drasticly. if anything else brakes, theres a solution to those problems as well. cryo the gears, reinforce the housing, stronger LSD, etc etc.
pus, i dont like the fact of loosing so much power in the drivetrain when i dont have to.
im BIG on overkill. do it right and go big or go home. i was going to do a 8.8 swap into my car but changed my mind. im certain the 7" can hold up fine if treated properly. iyoure going to be running drag slicks and doing high rpm launches, get the 8.8. if youre not, dont.
i have faith that with the moser axles the rigidity of the stocker is beefed up drasticly. if anything else brakes, theres a solution to those problems as well. cryo the gears, reinforce the housing, stronger LSD, etc etc.
pus, i dont like the fact of loosing so much power in the drivetrain when i dont have to.
11-23-07 | 08:38 AM
#7
Lives on the Forum
Joined: Jun 2004
Posts: 11,359
Likes: 14
From: Grand Rapids Michigan
Trending Topics
11-23-07 | 10:58 PM
#8
Savanna Rx-7
Joined: Jun 2004
Posts: 1,577
Likes: 12
From: yokosuka japan
once more for effect:
kenn
12-26-07 | 01:36 PM
#9
Psalms 37**25
Joined: Jan 2007
Posts: 866
Likes: 0
From: Garnerville N.Y
oh and 26x8.5 slicks...
The fella who built it for me gave me both 5.29"s with spool and 5.71"s with spool to use..
I recomend the toyota..oh and it weighs aprox 75-100 less than a mustang8 or ford 9.
