42s on my FJ40? - Page 2

Tapage · 01-15-08, 09:42 AM

I thought krawlers are lovely tires .. ( I like 'em

) but how much weight a krawler vs a irok ?

Sputnik40 · 01-15-08, 03:15 PM

I have 39" red label Krawlers on WE Beadlocks, using 2" spacers to compensate for FJ40 axle width and wheel offset. Love em - I like 42" IROK's too - and had contemplated that before I went with the Krawlers. They're not on the 40 right now - I'll see if I can't find a scale?

So far I've busted a Poly Chromo Rear long side axle shaft (waiting on warranty confirmation and am out $450 in the interim - that sucks), have toasted both small pattern knuckles running 4x4 labs high steer arms (no worries - had the 6 shoots and matching 4x4 labs arms on hand - plus they would have survived if I tightened more often right ;-). I've broken several pinions - but I'll attribute that to some set up issues as well as driving style. Kick arse tire!

Am in debate land on next mods. Definitely 4-linking like R.K. and others. From there it's uncertain - I have a D60 with some good stuff in it - and really like the STAK or Atlas, but am just not sure, prefer to keep a Toyota rear just as I don't know anything about Dana's yet. If that Diamond axle in the Slee Raison (sorry forgot name) were more affordable - I'd jump on that with the 35 spline D-35 axle conversion, and go STAK pronto. Till then - not sure....sorry rambling again. Back to 42's.....

mookie · 01-16-08, 12:37 PM

anyone have any idea how much the 39 krawler weighs? i think the 42 irok is 97lbs.

MarcoPolo · 01-19-08, 09:59 PM

Quote:

fj401ton It's only money, if you don't spend it the wifey will, and who wants a flower pattern couch or more tuperware

That cracks me up

.....a man who knows his woman

R.K. · 02-09-08, 03:47 PM

I have changed my mind (again) and decided to try the 42s. I found a good deal on a set of 42/17 IROKs, so I bought them. We'll see how they work out. Hope to have the Cruiser/buggy ready for Harlan in April. If worse comes to worse, I'll upgrade to 1 tons.

fj401ton · 02-10-08, 11:24 AM

Glad to hear you dropped the purse. Just keep an eye out for the D60 and when a good deal comes up grab it. A friend just got a D70 for his rear and now I want one , the bottom of the diff is as smooth as a baby's butt, and cheep. He paid 50 bucks with a lockright (sp) for a complete diff. enjoy the 42's

baxter650 · 02-18-08, 07:52 PM

I also bought a set, 14/42-15s.
I am hopeful that the rpm and slower torque build up of the diesel will be easier on axles but i will be buying polys for the rear and Longs supers for the front.
I do have a line on a 14 bolt FF rear just in case.

boots4 · 02-19-08, 07:58 AM

A diesel will have the opposite affect because of the way it builds torque. While rpms may be slow the torque builds very quickly and that can break stuff. So if you're in a situation were you are bound it's best not to stab the throttle on a diesel. Your longs and polys will be good insurance and you have a smart plan with planning in a 14bolt if needed. An auto would help cushion driveline shocks.

baxter650 · 02-19-08, 06:18 PM

The dieslel does have more torque but it builds at a slower rate with less shock to the system so i have been told.

boots4 · 02-19-08, 07:18 PM

If you look at a torque curve of a diesel engine you will notice that it rises very quickly compared to a gas engine. Diesels generally produce most of there torque around 2000 rpms, much sooner than a gasser so that causes a bigger and quicker shock to the drivetrain.

baxter650 · 02-19-08, 07:46 PM

This being my first diesel i have no first hand knowedge and i must admit what i was told seemed a little odd.
I guess i "wanted" to believe what i was hearing so... now that you have me all depressed, pass the Prosac.

mookie · 02-28-08, 02:29 PM

any updates on how the 42's on stock axles are working out? i read on pirate that you can now buy 42" irok comp. stickies directly from interco....i can't help but wonder if the increased traction and ease of approaching objects with a larger stickier tire would possible be less stressful on my axles than me constantly having to slam my crappy a$$ sx's into stuff to try to bump up over it? lol, but no doubt if that did turn out to be the case then it would only lead to me slamming into larger than ever obstacles...

Tapage · 02-29-08, 11:36 AM

Quote:

Originally Posted by boots4

If you look at a torque curve of a diesel engine you will notice that it rises very quickly compared to a gas engine. Diesels generally produce most of there torque around 2000 rpms, much sooner than a gasser so that causes a bigger and quicker shock to the drivetrain.

Much more if it's a Turbo Diesel, when the Turbo kicks on full boost you will notice the real amount of power in segs ..

R.K. · 03-01-08, 06:02 AM

Quote:

Originally Posted by mookie

any updates on how the 42's on stock axles are working out? i read on pirate that you can now buy 42" irok comp. stickies directly from interco....i can't help but wonder if the increased traction and ease of approaching objects with a larger stickier tire would possible be less stressful on my axles than me constantly having to slam my crappy a$$ sx's into stuff to try to bump up over it? lol, but no doubt if that did turn out to be the case then it would only lead to me slamming into larger than ever obstacles...

No updates yet, I haven't finished rebuilding the rig yet. I hope to have some updates in a month or so.

Another way to look at the sticky tires is that the increased traction would slip less, putting more force on the axles when they grab - potentially breaking more axle parts. I guess it depends on what your driving style is.

DBrown2 · 03-01-08, 09:39 AM

R.K. I have a rear for ya..

D44 6 Lug, out of a rodeo... Its 30 spline now, but they make upgrade axles to 35 spline... Heck 4 you I will sell it cheap

That was going to be my rear, until I found a 60 Already Cut.

Sputnik40 · 03-02-08, 07:02 PM

Didn't know you were shopping for a rear axle - I have that D60 sitting at Alan's shop near Traveler's Rest that I need to sell to recoup my loss on the boogered 40" MTR's I got last year. Supposed to have Yukon or Moser shafts, disc brakes and a 4.10 chunk. Only downside is overall width and I'm pretty sure it's 8 lug. Might just hang onto it for a future buggy project, but having just ordered a Orion HD and disc kit from Jessie - and well, hot damn, funds are low

.

Driving style might be key, after busting a 30 spline Poly shaft while idling up a hard line, I've been really really babying it!

R.K. · 03-03-08, 07:07 AM

Quote:

Originally Posted by Sputnik40

Didn't know you were shopping for a rear axle - I have that D60 sitting at Alan's shop near Traveler's Rest that I need to sell to recoup my loss on the boogered 40" MTR's I got last year. Supposed to have Yukon or Moser shafts, disc brakes and a 4.10 chunk. Only downside is overall width and I'm pretty sure it's 8 lug. Might just hang onto it for a future buggy project, but having just ordered a Orion HD and disc kit from Jessie - and well, hot damn, funds are low

.

Driving style might be key, after busting a 30 spline Poly shaft while idling up a hard line, I've been really really babying it!

I'm not shopping for a new rear axle, I think David was joking. I won't rule out an axle upgrade in the future if my current axles don't survive the 42s. If I upgrade, it will probably be a Dana 60 and 14 bolt.

DBrown2 · 03-03-08, 08:27 AM

Yep RK... A joke, but if its still at my house next time thru...

You need it really bad..

Mace · 03-03-08, 09:55 AM

Quote:

Originally Posted by Sputnik40

Driving style might be key, after busting a 30 spline Poly shaft while idling up a hard line, I've been really really babying it!

WHat fun is that??

lowtideride · 03-03-08, 11:14 AM

Quote:

Originally Posted by Mace

WHat fun is that??

Haha, watching that worked for me

Eskimo · 03-03-08, 01:37 PM

Quote:

Originally Posted by Mace

WHat fun is that??

Exactly. Mind you, I'm practicing the "preferred East Coast Driving Style", and idling is what is done right before the "clunk" of the stupid pedal hitting the floor.

I know it's not the most graceful or even the best way to get up things, but it's really, REALLY damn fun...

R.K. · 03-03-08, 02:49 PM

It's time for a new avatar Rich!

lowtideride · 03-03-08, 02:57 PM

Quote:

Originally Posted by Eskimo

Exactly. Mind you, I'm practicing the "preferred East Coast Driving Style", and idling is what is done right before the "clunk" of the stupid pedal hitting the floor.

I know it's not the most graceful or even the best way to get up things, but it's really, REALLY damn fun...

Whatever traction you have here its normally on the first go. So if you can't crawl it in the first few attempts there is nothing else to do but romp the skinny pedal.

Eskimo · 03-03-08, 03:46 PM

Quote:

Originally Posted by R.K.

It's time for a new avatar Rich!

Happy now?

Tapage · 03-03-08, 04:02 PM

Quote:

Originally Posted by Eskimo

Happy now?

Damn nice .. where to see more pics .. ?

R.K. · 03-03-08, 07:28 PM

Quote:

Originally Posted by Tapage

Damn nice .. where to see more pics .. ?

Pics of Rich's (Eskimo) Cruiser:

And more here:
RKBJR/Tellico Ocotber 2007 - Photobucket - Video and Image Hosting

01-15-08, 03:15 PM	#32
Sputnik40 IH8MUD Lifer Join Date: Sep 2005 TLCA# 6187 Posts: 1,348	I have 39" red label Krawlers on WE Beadlocks, using 2" spacers to compensate for FJ40 axle width and wheel offset. Love em - I like 42" IROK's too - and had contemplated that before I went with the Krawlers. They're not on the 40 right now - I'll see if I can't find a scale? So far I've busted a Poly Chromo Rear long side axle shaft (waiting on warranty confirmation and am out $450 in the interim - that sucks), have toasted both small pattern knuckles running 4x4 labs high steer arms (no worries - had the 6 shoots and matching 4x4 labs arms on hand - plus they would have survived if I tightened more often right ;-). I've broken several pinions - but I'll attribute that to some set up issues as well as driving style. Kick arse tire! Am in debate land on next mods. Definitely 4-linking like R.K. and others. From there it's uncertain - I have a D60 with some good stuff in it - and really like the STAK or Atlas, but am just not sure, prefer to keep a Toyota rear just as I don't know anything about Dana's yet. If that Diamond axle in the Slee Raison (sorry forgot name) were more affordable - I'd jump on that with the 35 spline D-35 axle conversion, and go STAK pronto. Till then - not sure....sorry rambling again. Back to 42's..... __________________ "The devil made me do it the first time. The second time I done it on my own."

01-16-08, 12:37 PM	#33
mookie IH8MUD Regular Join Date: Oct 2004 Location: Temple, georgia Posts: 305	anyone have any idea how much the 39 krawler weighs? i think the 42 irok is 97lbs. __________________ "Beer is living proof that God loves us and wants us to be happy." - Benjamin Franklin '71 FJ55 '74 FJ40

02-09-08, 03:47 PM	#35
R.K. IH8MUD Addict Join Date: Feb 2002 Location: NC TLCA# 3968 Posts: 545	I have changed my mind (again) and decided to try the 42s. I found a good deal on a set of 42/17 IROKs, so I bought them. We'll see how they work out. Hope to have the Cruiser/buggy ready for Harlan in April. If worse comes to worse, I'll upgrade to 1 tons. __________________ FJ40 buggy - 5.7 Vortec/SM465/LoMax205, 42" Iroks, 30 spline Longs, tubed back half, 4-linked rear, etc.

02-18-08, 07:52 PM	#37
baxter650 IH8MUD Regular Join Date: Aug 2005 Location: Abbotsford B.C. Posts: 419	I also bought a set, 14/42-15s. I am hopeful that the rpm and slower torque build up of the diesel will be easier on axles but i will be buying polys for the rear and Longs supers for the front. I do have a line on a 14 bolt FF rear just in case. __________________ 1980 PU 9" lift 383 38" Swampers 1993 FZJ80 6" slee lift 37s 2000 XR671L 83 BJ60 under construction 2008 XR650L

02-19-08, 07:58 AM	#38
boots4 IH8MUD Addict Join Date: Jun 2007 Location: Portland OR Posts: 567	A diesel will have the opposite affect because of the way it builds torque. While rpms may be slow the torque builds very quickly and that can break stuff. So if you're in a situation were you are bound it's best not to stab the throttle on a diesel. Your longs and polys will be good insurance and you have a smart plan with planning in a 14bolt if needed. An auto would help cushion driveline shocks. __________________ 85 FJ60, testing, Cummins 4BTA, manual 4L80E, 203 to splitcase doubler, SOA, 38s, some other stuff. build-up: http://forum.ih8mud.com/hardcore-corner/160807-family-haulin.html

02-10-08, 11:24 AM	#36
fj401ton IH8MUD Rookie Join Date: Jul 2007 Location: Coquitlam british columbia canada Posts: 19	Glad to hear you dropped the purse. Just keep an eye out for the D60 and when a good deal comes up grab it. A friend just got a D70 for his rear and now I want one , the bottom of the diff is as smooth as a baby's butt, and cheep. He paid 50 bucks with a lockright (sp) for a complete diff. enjoy the 42's

02-19-08, 06:18 PM	#39
baxter650 IH8MUD Regular Join Date: Aug 2005 Location: Abbotsford B.C. Posts: 419	The dieslel does have more torque but it builds at a slower rate with less shock to the system so i have been told. __________________ 1980 PU 9" lift 383 38" Swampers 1993 FZJ80 6" slee lift 37s 2000 XR671L 83 BJ60 under construction 2008 XR650L

02-19-08, 07:18 PM	#40
boots4 IH8MUD Addict Join Date: Jun 2007 Location: Portland OR Posts: 567	If you look at a torque curve of a diesel engine you will notice that it rises very quickly compared to a gas engine. Diesels generally produce most of there torque around 2000 rpms, much sooner than a gasser so that causes a bigger and quicker shock to the drivetrain. __________________ 85 FJ60, testing, Cummins 4BTA, manual 4L80E, 203 to splitcase doubler, SOA, 38s, some other stuff. build-up: http://forum.ih8mud.com/showthread.php?t=160807

02-19-08, 07:46 PM	#41
baxter650 IH8MUD Regular Join Date: Aug 2005 Location: Abbotsford B.C. Posts: 419	This being my first diesel i have no first hand knowedge and i must admit what i was told seemed a little odd. I guess i "wanted" to believe what i was hearing so... now that you have me all depressed, pass the Prosac. __________________ 1980 PU 9" lift 383 38" Swampers 1993 FZJ80 6" slee lift 37s 2000 XR671L 83 BJ60 under construction 2008 XR650L

02-28-08, 02:29 PM	#42
mookie IH8MUD Regular Join Date: Oct 2004 Location: Temple, georgia Posts: 305	any updates on how the 42's on stock axles are working out? i read on pirate that you can now buy 42" irok comp. stickies directly from interco....i can't help but wonder if the increased traction and ease of approaching objects with a larger stickier tire would possible be less stressful on my axles than me constantly having to slam my crappy a$$ sx's into stuff to try to bump up over it? lol, but no doubt if that did turn out to be the case then it would only lead to me slamming into larger than ever obstacles... __________________ "Beer is living proof that God loves us and wants us to be happy." - Benjamin Franklin '71 FJ55 '74 FJ40

03-01-08, 09:39 AM	#45
DBrown2 IH8MUD Regular Join Date: Mar 2005 Location: Dayton, TN Posts: 348	R.K. I have a rear for ya.. D44 6 Lug, out of a rodeo... Its 30 spline now, but they make upgrade axles to 35 spline... Heck 4 you I will sell it cheap That was going to be my rear, until I found a 60 Already Cut.

03-02-08, 07:02 PM	#46
Sputnik40 IH8MUD Lifer Join Date: Sep 2005 TLCA# 6187 Posts: 1,348	Didn't know you were shopping for a rear axle - I have that D60 sitting at Alan's shop near Traveler's Rest that I need to sell to recoup my loss on the boogered 40" MTR's I got last year. Supposed to have Yukon or Moser shafts, disc brakes and a 4.10 chunk. Only downside is overall width and I'm pretty sure it's 8 lug. Might just hang onto it for a future buggy project, but having just ordered a Orion HD and disc kit from Jessie - and well, hot damn, funds are low . Driving style might be key, after busting a 30 spline Poly shaft while idling up a hard line, I've been really really babying it! __________________ "The devil made me do it the first time. The second time I done it on my own."

03-03-08, 08:27 AM	#48
DBrown2 IH8MUD Regular Join Date: Mar 2005 Location: Dayton, TN Posts: 348	Yep RK... A joke, but if its still at my house next time thru... You need it really bad..

03-03-08, 02:49 PM	#52
R.K. IH8MUD Addict Join Date: Feb 2002 Location: NC TLCA# 3968 Posts: 545	It's time for a new avatar Rich! __________________ FJ40 buggy - 5.7 Vortec/SM465/LoMax205, 42" Iroks, 30 spline Longs, tubed back half, 4-linked rear, etc.