Can you answer this CG question? - Pirate4x4.Com : 4x4 and Off-Road Forum

andy 1333 · 01-05-2006, 12:12 PM

The specific question is what width axle would I need to keep the CG the same or as close as feasible after doing these modifications to my 2000 TJ . Currently I have stock width axles, 3 inch suspension lift, 33 x 12.50 tires and 15x8 wheels with 3 1/2 inch backspacing. I will be going to a 5.5 inch RE LA lift with 35 inch tires and new axles.

upnover-X · 01-05-2006, 02:53 PM

People run that set up all day long on stock TJ axles.... so 60" wms to wms would be find... If you're getting customs axles go 62" wms ot wms and 37" tire's.............IMO.....

401ton · 01-05-2006, 03:12 PM

A general rule of thumb is if you go up 4 ", you will need to go 4" wider to remain close to same CG. Doesn't mean you can't go higher without going wider, just use it as a guide.

Kreep · 01-05-2006, 04:46 PM

401ton has given you the text book answer. Keep in mind you should also increase the wheelbase to maintain stability.

Technically, you're not keeping the CG the same, you are keeping the stability the same.

upnover-X · 01-06-2006, 10:25 AM

4x4 is a good rule....... but your not going very big and all the TJ I have wheeled with have to 5.5 and 35's and have no problems at all... Work’s really well.... but If it's an issue with you? Do the long arm and keep the 3.5 springs... and CUT to clear your 35's.... That will keep you COG low..... (Tube fenders up front and comp cut the rear)

I think you’re over thinking your next mod(s)..... 5.5 & 35's on a stock TJ (D44 rear) is a nice set up all by it's self....

butch6924 · 01-06-2006, 12:27 PM

Quote:

Originally Posted by upnover-X

I think you’re over thinking your next mod(s)..... 5.5 & 35's on a stock TJ (D44 rear) is a nice set up all by it's self....

x2

andy 1333 · 01-06-2006, 02:00 PM

I will take your ideas into consideration. If anybody else would like to make a suggestion it would certainly be appreciated.

01-05-2006, 12:12 PM	#1 (permalink)
andy 1333 Registered User Join Date: Nov 2005 Member # 57159 Location: Breckenridge, colorado Posts: 47	Can you answer this CG question? The specific question is what width axle would I need to keep the CG the same or as close as feasible after doing these modifications to my 2000 TJ . Currently I have stock width axles, 3 inch suspension lift, 33 x 12.50 tires and 15x8 wheels with 3 1/2 inch backspacing. I will be going to a 5.5 inch RE LA lift with 35 inch tires and new axles.

01-05-2006, 02:53 PM	#2 (permalink)
upnover-X Registered User Join Date: Oct 2004 Member # 36311 Posts: 134	People run that set up all day long on stock TJ axles.... so 60" wms to wms would be find... If you're getting customs axles go 62" wms ot wms and 37" tire's.............IMO..... __________________ Slow and Go, That is the tempo. [url]http://www.putfile.com/bfg35yj[/url]

01-05-2006, 03:12 PM	#3 (permalink)
401ton Registered User Join Date: Mar 2004 Member # 28432 Location: Des Moines, IA Posts: 319	A general rule of thumb is if you go up 4 ", you will need to go 4" wider to remain close to same CG. Doesn't mean you can't go higher without going wider, just use it as a guide. __________________ AMC 401, Howell TBI, NP-435, Atlas 4.3, Rockcrusher 60, Shaved 14 Bolt, 110" WB, Stazworks Double Beadlocks on 42" Swampers...

01-05-2006, 04:46 PM	#4 (permalink)
Kreep Granite Guru Join Date: Sep 2002 Member # 14004 Location: Illinois Posts: 846	401ton has given you the text book answer. Keep in mind you should also increase the wheelbase to maintain stability. Technically, you're not keeping the CG the same, you are keeping the stability the same. __________________ 82 CJ7 - TBI 304/T18a/D300/44/70/4.88/40's 87 Samurai - GSX carbs/16V 1.6/GRS-II/linked rear/31's

01-06-2006, 10:25 AM	#5 (permalink)
upnover-X Registered User Join Date: Oct 2004 Member # 36311 Posts: 134	4x4 is a good rule....... but your not going very big and all the TJ I have wheeled with have to 5.5 and 35's and have no problems at all... Work’s really well.... but If it's an issue with you? Do the long arm and keep the 3.5 springs... and CUT to clear your 35's.... That will keep you COG low..... (Tube fenders up front and comp cut the rear) I think you’re over thinking your next mod(s)..... 5.5 & 35's on a stock TJ (D44 rear) is a nice set up all by it's self.... __________________ Slow and Go, That is the tempo. [url]http://www.putfile.com/bfg35yj[/url]

01-06-2006, 02:00 PM	#7 (permalink)
andy 1333 Registered User Join Date: Nov 2005 Member # 57159 Location: Breckenridge, colorado Posts: 47	Thanks to all who took the time to answer my question I will take your ideas into consideration. If anybody else would like to make a suggestion it would certainly be appreciated.

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