Am I going to have an issue? - Pirate4x4.Com : 4x4 and Off-Road Forum

EHeye · 11-25-2005, 04:15 PM

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.

Rockrat · 11-25-2005, 04:48 PM

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..

dr_claw · 11-26-2005, 11:27 AM

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.

dr_claw · 11-26-2005, 11:32 AM

oh yeah, 42's have a fine spline pinion too.

Kicker_92 · 11-26-2005, 11:37 AM

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.

Rockrat · 11-26-2005, 03:58 PM

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

dr_claw · 11-27-2005, 12:18 PM

true, no prob.

EHeye · 11-28-2005, 12:20 PM

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?

11-25-2005, 04:15 PM	#1 (permalink)
EHeye Registered User Join Date: Aug 2004 Member # 34724 Location: Mission, BC, CANADA Posts: 790	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.

11-25-2005, 04:48 PM	#2 (permalink)
Rockrat Zeus of the Sluice Join Date: Nov 2001 Member # 8111 Location: Waukegan Illinois Posts: 3,842	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.. __________________ Your right I own the Fucking Place All Rock 4X Fab Products Made IN THE USA!!! Rock 4X Fabrication,Inc 1-847-672-9653

11-26-2005, 11:27 AM	#3 (permalink)
dr_claw Granite Guru Join Date: Apr 2002 Member # 11222 Location: Vancouver, BC, CANADA EH! Posts: 794	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. __________________ Quote: Originally Posted by 5thgear Or for $59 you could by 2 vibrators and hold them like handlebars Teaching Metalwork in Van City 88.5 Suzuki Samurai, Daily driver with locked toy axles. 77 FJ45 cut up with a bunch of misc crap

11-26-2005, 11:32 AM	#4 (permalink)
dr_claw Granite Guru Join Date: Apr 2002 Member # 11222 Location: Vancouver, BC, CANADA EH! Posts: 794	oh yeah, 42's have a fine spline pinion too. __________________ Quote: Originally Posted by 5thgear Or for $59 you could by 2 vibrators and hold them like handlebars Teaching Metalwork in Van City 88.5 Suzuki Samurai, Daily driver with locked toy axles. 77 FJ45 cut up with a bunch of misc crap

11-27-2005, 12:18 PM	#7 (permalink)
dr_claw Granite Guru Join Date: Apr 2002 Member # 11222 Location: Vancouver, BC, CANADA EH! Posts: 794	true, no prob. __________________ Quote: Originally Posted by 5thgear Or for $59 you could by 2 vibrators and hold them like handlebars Teaching Metalwork in Van City 88.5 Suzuki Samurai, Daily driver with locked toy axles. 77 FJ45 cut up with a bunch of misc crap

11-28-2005, 12:20 PM	#8 (permalink)
EHeye Registered User Join Date: Aug 2004 Member # 34724 Location: Mission, BC, CANADA Posts: 790	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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