Spoa on a CJ3B

conjon · 16th April 2010, 10:02

Quote:

Originally Posted by ex670c

SPOA will always improve the ride.

Arka sir,

Is this because the leaf springs are under compressive load normally on road rather than tensile load as in a sping under axle setup?

ex670c · 16th April 2010, 18:47

Quote:

Originally Posted by diesel_maniac

Hi Arka,

For a layman like me going for SPOA setup on a vehicle means it will increase the overall height. Since I have no experience or knowledge about the effects of a SPOA job on a vehicle's ride and handling. Please elaborate what benefits can one expect from a SPOA setup. This information will be very educative and inspiring to upcoming Jeepers like me.

regards

Quote:

Originally Posted by conjon

Arka sir,

Is this because the leaf springs are under compressive load normally on road rather than tensile load as in a sping under axle setup?

Hi Guys,

I'm not thorough with the tech stuff on this. But it as the Axle Center will change relative to the Leaf Spring Eyes (Triangulation) also the Leaf Spring will pivot on the Axle Tube.

I think Spike Arrestor can make a better and more elaborate explanation.

Regards,

Arka

jagat nanjappa · 22nd October 2010, 10:33

Tried out SPOA on the CJ3b. The handling, don't even want to talk about it !
Undoing it now.

headers · 22nd October 2010, 11:13

That was fast Jagat. I was expecting the handling to go for a dive..Thanks for the reassurance.

Ride and handling are two different parameters and one should strike a balance [read as compromise during OTR].

Cheers

Jaggu · 22nd October 2010, 19:24

Jagat did you try wider axles? SWB taller you go, wider track will help compensate the handling issue to an extent.

svsantosh · 6th December 2010, 00:02

Quote:

Originally Posted by livyodream

saw this SPOA'd jeep in coorg OTR. not sure of the model though

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Quote:

Originally Posted by krishnathanthri

I had seen this Jeep in a Garage in Mysore. It was there for quite a few months

I happened to come across a SPOA Jeep, coincidentally in coorg. More coincidentally done up in Mysore.

This is owned by a estate owner, has participated in OTRs and more relevant, used as a daily drive. Necessity for the MOD was daily drive around the unforgiving paths/tracks around coffee estates around Coorg.

He said a few things that should sum up any questions from prospective modders...

1) Very easy to do, only need a competent garage/mechanic
2) no failures/breakdowns so faar due to increased joint angles
3) BAD shift in C.O.G on normal roads - something what Jagat said a few posts ago. This owner also was a rally'ist in the past.

Notice, no traction bar - and no failures till date with daily offroading activity around tracks. Of course none so demanding that may warrant a axle wrap prevention mod.

PS - Guess the vehicle

Njoy the pics... notice the experimenting with Rear Shocker mount on/off axle, reverting to u-bolt plate (whats that called).

jeepster · 6th December 2010, 10:11

Quote:

Originally Posted by svsantosh

I happened to come across a SPOA Jeep,

PS - Guess the vehicle

its a 540/550 with NGCS setup.

svsantosh · 6th December 2010, 15:10

^^ Huh, not even close, on both fronts

I can understand the 5x0, but how did you relate to NGCS? No M&Ms IIRC are offered as SPOA.

offroad_maniac · 6th December 2010, 15:26

Quote:

Originally Posted by svsantosh

^^ Huh, not even close, on both fronts

I can understand the 5x0, but how did you relate to NGCS? No M&Ms IIRC are offered as SPOA.

Is it the first lot of Commander 750 series having BOX section rails?
I think those chassis were on few LWB Mahindras. They are same like older C sections but are boxed having tubular cross sections??

I think Invaders/ Strikers are offered with rear SPOA setup stock from factory.

fazalaliadil · 6th December 2010, 15:57

The rear differential has been tilted upward by 3" to minimize the tilt of the rear shaft, the front differential being in the stock position has the front shaft tilted at a ridiculous angle, subjecting the joint/ cross to extreme stress, wear and very good chance of breaking at the stress point.

Apart from the above, this 540 with a later model (tubular cross members) chassis loses on stability due to the body raise resulting in higher center of gravity.

ex670c · 6th December 2010, 18:26

Quote:

Originally Posted by svsantosh

Guess the vehicle

Hi Santosh,

This looks like a pre 1998 Armada.

Peugeot Engine with Spike Arrester.

Regards,

Arka

svsantosh · 6th December 2010, 18:49

Hi Off_Man, Fazal, Arka,

The vehicle was a 750 commander. Chassis# was CDR750..., I would have never guessed it, looked like a 540, but very purpose built for estate/farm use. The owner Harsha uses it for daily use, and has had no issues till date. Am surprised the front joint hasnt broken at such angles.

Arka - Can you help me identify the shocker on this, it is a silver painted gabriel gas-filled shock. I couldnt identify the part# under the dust and grime.

Thanks in advance...

jeepster · 6th December 2010, 19:10

here is a NGCS 650.

i guess both 750 & 650 use same NGCS setup.

sreejeshmp · 6th December 2010, 20:16

Santhosh,

This type SPOA set up came as OEM for mahindra CL series type 4WD pik up
with DI engine.

22nd October 2010, 10:33	#18
jagat nanjappa BHPian Join Date: Mar 2007 Location: Bangalore Posts: 39 Thanked: 14 Times	Tried out SPOA on the CJ3b. The handling, don't even want to talk about it ! Undoing it now.
	() Thanks

22nd October 2010, 11:13	#19
headers Senior - BHPian Join Date: May 2006 Location: Greater Chennai Posts: 4,667 Thanked: 559 Times	That was fast Jagat. I was expecting the handling to go for a dive..Thanks for the reassurance. Ride and handling are two different parameters and one should strike a balance [read as compromise during OTR]. Cheers
	() Thanks

22nd October 2010, 19:24	#20
Jaggu Team-BHP Support Join Date: May 2004 Location: Bangalore Posts: 20,212 Thanked: 15,892 Times	Jagat did you try wider axles? SWB taller you go, wider track will help compensate the handling issue to an extent.
	() Thanks

6th December 2010, 15:10	#23
svsantosh Senior - BHPian Join Date: Mar 2008 Location: Dubai Posts: 3,990 Thanked: 6,175 Times View My Garage	^^ Huh, not even close, on both fronts I can understand the 5x0, but how did you relate to NGCS? No M&Ms IIRC are offered as SPOA.
	() Thanks

6th December 2010, 15:57	#25
fazalaliadil Senior - BHPian Join Date: Oct 2008 Location: Hyderabad Posts: 2,022 Thanked: 671 Times View My Garage	The rear differential has been tilted upward by 3" to minimize the tilt of the rear shaft, the front differential being in the stock position has the front shaft tilted at a ridiculous angle, subjecting the joint/ cross to extreme stress, wear and very good chance of breaking at the stress point. Apart from the above, this 540 with a later model (tubular cross members) chassis loses on stability due to the body raise resulting in higher center of gravity.
	() Thanks

6th December 2010, 18:49	#27
svsantosh Senior - BHPian Join Date: Mar 2008 Location: Dubai Posts: 3,990 Thanked: 6,175 Times View My Garage	Hi Off_Man, Fazal, Arka, The vehicle was a 750 commander. Chassis# was CDR750..., I would have never guessed it, looked like a 540, but very purpose built for estate/farm use. The owner Harsha uses it for daily use, and has had no issues till date. Am surprised the front joint hasnt broken at such angles. Arka - Can you help me identify the shocker on this, it is a silver painted gabriel gas-filled shock. I couldnt identify the part# under the dust and grime. Thanks in advance...
	() Thanks

6th December 2010, 19:10	#28
jeepster Senior - BHPian Join Date: Oct 2008 Location: MH24 aka LATUR Posts: 1,694 Thanked: 1,926 Times View My Garage	here is a NGCS 650. i guess both 750 & 650 use same NGCS setup.
	() Thanks

6th December 2010, 20:16	#29
sreejeshmp BHPian Join Date: May 2007 Location: Areekode Posts: 651 Thanked: 821 Times	Santhosh, This type SPOA set up came as OEM for mahindra CL series type 4WD pik up with DI engine.
	() Thanks