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Old 11-25-2005, 04:15 PM   #1 (permalink)
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Am I going to have an issue?

Seeing as I can't afford to do the swap that I WANT right now (putting a ring on the g/f's finger) I was wondering about the power of my 1.3L. Heres the basics of what I am going to do.

I have an 85 flat deck.

Have rears all the way around, I am going to be putting bj42 LC diffs under it (don't want a compund angle on the dshaft with such a short wheelbase, I also picked them up for next to nothing) w/ 5.29 R&P. The plan is to run 35" boggers (our terrain in BC needs them). I just want it to be going for right now, so I am not going to do anything to the t-case yet, dont have the coin to do it.

Do you think my 1.3L w/ TBI and a 1 3/4" exhaust will be able to turn those boggers w/ 5.29's in the R&P? I know the LC diffs are much beefier than the mini truck diffs, so I am pretty sure that will tie into the extra turning mass.
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Old 11-25-2005, 04:48 PM   #2 (permalink)
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Well LC diffs definatley have larger R/P but if the birfs are the course spline they are not stonger then the mini's. Seeing how you got them for near nothing run them. as for the motor and 5:29 it wont be a speed demon but it should work until you get the coin for case gears..
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Old 11-26-2005, 11:27 AM   #3 (permalink)
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sorry rockrat...

the landcruiser diffs use a 9.5" ringgear. The birfs are the same as a mini truck. Same hubs, same brakes on the front. Removable third. All kinda same.

The rear of a bj42 has better brakes than a 40, but the same as a 60. The 42's use only one brake cylinder, not two like 40's. They are 2" narrower than a 60.

Do not run 5.29's in your landcruiser diffs. Unlike mini trucks, 5.29's are kinda weak for landcruisers.

Run 4.88's.

I will be running a landcruiser ff rear axle and a mini truck front when my truck is done.
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Old 11-26-2005, 11:32 AM   #4 (permalink)
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oh yeah, 42's have a fine spline pinion too.
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Old 11-26-2005, 11:37 AM   #5 (permalink)
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Quote:
Originally Posted by EHeye
Seeing as I can't afford to do the swap that I WANT right now (putting a ring on the g/f's finger) I was wondering about the power of my 1.3L. Heres the basics of what I am going to do.
I think your solving the wrong problem. Cubic zirconia and doing the motor swap is your answer.
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Old 11-26-2005, 03:58 PM   #6 (permalink)
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Quote:
Originally Posted by Rockrat
Well LC diffs definatley have larger R/P but if the birfs are the course spline they are not stonger then the mini's. Seeing how you got them for near nothing run them. as for the motor and 5:29 it wont be a speed demon but it should work until you get the coin for case gears..
Quote:
Originally Posted by dr_claw
sorry rockrat...

the landcruiser diffs use a 9.5" ringgear. The birfs are the same as a mini truck. Same hubs, same brakes on the front. Removable third. All kinda same.

The rear of a bj42 has better brakes than a 40, but the same as a 60. The 42's use only one brake cylinder, not two like 40's. They are 2" narrower than a 60.

Do not run 5.29's in your landcruiser diffs. Unlike mini trucks, 5.29's are kinda weak for landcruisers.

Run 4.88's.

I will be running a landcruiser ff rear axle and a mini truck front when my truck is done.
As I stated above they have larger R/P, But the Birfs are not all the same. Older L/C had a course spline birf that was weaker then the newer fine spline they also had drum until 77 or 78 on hte front. I am not familiar with the exact years, Just stating that there is a diffence depending on which one you get
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Last edited by Rockrat; 11-26-2005 at 04:00 PM.
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Old 11-27-2005, 12:18 PM   #7 (permalink)
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true, no prob.
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Old 11-28-2005, 12:20 PM   #8 (permalink)
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When I lock up the front I will be smurfing the birfs anyways, so that shouldn't be any problem.

So no to the 5.29's and get 4.88's? With the 4.88's will I have any issues? Right now I am running 32" tires with 3.90 r&p. The 1.3L has enough power to spin them, just a little bouncy when doing any "crawling"

With the 4.88's and 35" boggers, it should be about the same as my current setup with the 3.90's correct?
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