Some general hp/tq & axle combo guidelines?

[Vexarana]

I've been reading up on a few different engine and axle swaps, and for right now I'm thinking I should do the axle swap on my truck first and then do the engine in a few months.

What I don't want to have to do is swap axles multiple times, or worry about beefing stuff up too much in order to avoid breaking it before i even start souping up my engine I'll be swapping.

Right now I have an old OHV 4.0, which is somewhere around 160 HP and 240 tq's.

But what I want in the long run is a 4BT with somewhere around 300-400 HP, and that would put it somewhere near 700-900 tq's.

Do I need to put a full 1 ton axle underneath that?

I was looking at a D44 TTB front, modding it with equal length beams, and making it have a crazy amount of travel. Then for the rear I was looking at a 10.5/10.25 or a D60.

Some of the threads have cast doubt on running a half ton with that many horses, and especially the tq's a 4BT puts out... makes me somewhat doubt it.

Basically, does anyone have some general guidelines of what axles are suitable for what hp/tq/tire sizes?

Forgot to mention I'll only be running 35's on my ranger. Most likely never larger than that.


TLDR:

4BT 350 HP 700 ftlb

D44 TTB front D60 rear? Or get something better? (Disc preferred, or able to upgrade to disks later)

EDIT : Forgot to mention I'm wanting to 4-link the rear to lay down the power off stoplights and other foolishness, and coilovers on the front.

 

[scooter]

I've been reading up on a few different engine and axle swaps, and for right now I'm thinking I should do the axle swap on my truck first and then do the engine in a few months.

What I don't want to have to do is swap axles multiple times, or worry about beefing stuff up too much in order to avoid breaking it before i even start souping up my engine I'll be swapping.

Right now I have an old OHV 4.0, which is somewhere around 160 HP and 240 tq's.

But what I want in the long run is a 4BT with somewhere around 300-400 HP, and that would put it somewhere near 700-900 tq's.

Do I need to put a full 1 ton axle underneath that?

I was looking at a D44 TTB front, modding it with equal length beams, and making it have a crazy amount of travel. Then for the rear I was looking at a 10.5/10.25 or a D60.

Some of the threads have cast doubt on running a half ton with that many horses, and especially the tq's a 4BT puts out... makes me somewhat doubt it.

Basically, does anyone have some general guidelines of what axles are suitable for what hp/tq/tire sizes?

Forgot to mention I'll only be running 35's on my ranger. Most likely never larger than that.


TLDR:

4BT 350 HP 700 ftlb

D44 TTB front D60 rear? Or get something better? (Disc preferred, or able to upgrade to disks later)

EDIT : Forgot to mention I'm wanting to 4-link the rear to lay down the power off stoplights and other foolishness, and coilovers on the front.

If you have the money for a 700hp engine and coilovers Run d-60's or 14 bolts (d-60 outer steering stuff for a steer axle) f&r.
A d-44 is not a good abuse axle for 300hp...


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[6.2]

definately want more than D44 up front with that kinda torque/power.
for piece of mind at least. im sure the 44 would hold up, but the question is for how long lol

 

[1badexplorer]

D70 10.25 or 14b for the rear. a 60 wont hold 900tq without better shafts.

 

[scooter]

Here you go, Rockwell Hybrid Axles.

http://www.pirate4x4.com/forum/showthread.php?t=891594

Todd S.
P.S. I have read this entire thread. There is some great info out there if your thinking about running Rockwells.


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[Vexarana]

ahh I'm trying to avoid throwing a 500 lb axle under each end. What about the D50 TTB? How much could that hold? I'm buying a 250hd in about a week, and was going to sas that with a d60 or possibly larger. The axle I put under that I'll be buying though. If. I need to put some heavier weight axles under my ranger anyways, id hate to waste a TTB 50.

I could always change plans on the engine, too. Keep the injectors a little bit smaller or cut out methanol. What would a mildly built D50 TTB hold? 250hp/600tq?

 

[scooter]

A ttb prolly wouldnt hold up imho.
More hp/tq = bigger axles. A solid axle 60 is wayyyyyy stronger that a ttb 50. Not to mention lots of aftermarket parts when/if you break something.

 

[Vexarana]

Sorry, not really an axle guru. Is it more about the u-joints on a TTB or is it the axle shafts?

 

[1badexplorer]

Sorry, not really an axle guru. Is it more about the u-joints on a TTB or is it the axle shafts?

The inner shafts on a TTB 50 are the same size as a dana 44. The 50 also uses smaller joints than a 60 front.

 

[scooter]

The inner shafts on a TTB 50 are the same size as a dana 44. The 50 also uses smaller joints than a 60 front.

Did not know that ^^
What about a solid d-50? Is it smaller shafts too?

Just wondering cuz I know a local goon that put one in a FS Bronco and swore it was a d-60. After he bought a 60 locker and it wouldnt fit he admitted he was wrong.

 

[1badexplorer]

Did not know that ^^
What about a solid d-50? Is it smaller shafts too?

Just wondering cuz I know a local goon that put one in a FS Bronco and swore it was a d-60. After he bought a 60 locker and it wouldnt fit he admitted he was wrong.

The Dana 50s Both TTB and solid are like a 28/35 hybrid in a ranger. Big outers like a Dana 60 but smaller gears, carrier, and inner shafts.

 

[4x4junkie]

The SA D50 could be compared to the D28/35 hybrid (a D50/60 hybrid).

The TTB D50 is kindof it's own thing (like the earlier D28 is), it has little in common with any other axle aside from the hubs/rotors.

 

[Vexarana]

So anything safe for a 44 would be safe for a 50 prettymuch? Are there any advantages then to a D50 other than it would come straight out from under my F250 when I SAS that?

Since it was put under the 7.3 PSD it should be good for 200-250 horses and 500 tq's? I'm interested in spinning the 4BT but probably not as fast as you need for 300+ horses..

 

[85_Ranger4x4]

I don't think it would be worth the hassle to put a TTB D50 under anything that didn't come with one.

I don't think a solid D50 would be too bad though...

 

[Cummins_Ranger]

not axle related, but i saw 4bt mentioned so i figured id add... if your shooting for the 3-400hp mark find a p-pump'd engine if you havent bought the engine yet. going to take a lot to get up to 400 reliable hp