Thread: Lifted P38 on air - questions

Any other recommendations after fitting a lift kit with regards to tracking and caster. I'll get the tracking checked regardless, as it is pulling slightly.

Originally Posted by Keithy P38

Do you drive around in 'standard' height or 'low' most of the time Gary?

On the bitumen low all the time, including for towing. When off road up to standard height. To date I have not had the need for extended height because I have not done any deep creek crossings. In respect to wheel alignment, I took mine in for an alignment after doing the ball joints, drag link and steering. The report back was all within specification. The additional item I have not gotten around to is the front sway bar connectors. Due to the lift the connectors are now 2" too short. One day I must get around to getting some the correct length .

Gary

Thanks mate. Same here.

In my humble opinion there would be two ways to gain the additional height (50mm). Option 1 would be to fit gen 3 bags and extend the sensors to use the additional length the bags offer. The second option would be spacers under standard bags. Both options would utilise the longer shock and require the brake line, etc adjustments.

Would I be correct in assuming that gen 3 bags with spacers would require a 50mm longer shock to take up the spacer dimension, and an additional 50mm (100mm total) additional down travel to make full use of the gen 3 length?

Originally Posted by RoverHse

In my humble opinion there would be two ways to gain the additional height (50mm). Option 1 would be to fit gen 3 bags and extend the sensors to use the additional length the bags offer. The second option would be spacers under standard bags. Both options would utilise the longer shock and require the brake line, etc adjustments.

Would I be correct in assuming that gen 3 bags with spacers would require a 50mm longer shock to take up the spacer dimension, and an additional 50mm (100mm total) additional down travel to make full use of the gen 3 length?

Some of the reason for the angled spacers is also to correct the angle the piston is to the bladder on the rear at full articulation when the +2 inch shocks are in place (equates to about 3 inches more at the wheel). This helps stop over extending the front facing part of the bladder on the rear bags (even on stock shocks the angle gets quite large).

I have had my bits all ready (except to actually extend the sensor arms) but it got pushed back over a locker, front bar, and dual battery setup.... But its coming trust me.

My spacers are only 25mm tall. If the bump stops aren't needed to be lengthened then the articulation is the same as if no spacers are installed with extended shocks. Just the bags won't extend quite as much at full droop ( alot less on the front face of the bags), but the bags will fold more when on the bump stops... 50mm spacers will mean even less extension again but more fold when on the bump stops. Less risky of over extending the bags.

To get the same spring rates as when no spacers, the ride height will increase by the amount of spacer. If you change the EAS to ride at the same ground clearance as stock then the ride will be firmer as standard will move into the highway height spring rates on the bags.

With no bump stop length changes, the +2 terrafirmas are the limit of extended shocks otherwise the shock body gets too big on anything longer, and you would need to extend the bump stops to stop the shock bottoming out.

Hope this helps. You might need to get under and look/think about the spacers a little to understand what I've said though. Not so keen to sketch anything up to illustrate.

What Peter said, plus my own musings.

Option 1 poses problems with extended shocks as you'd be in real danger of over extending the bags.

Same with option 2: spacers plus oem bags and the extended shocks - over extending the bags, but perhaps less of a risk than option 1.

Good point there.

I didn't read the standard bags part... Just assumed he was tossing up between using spacers or not with the gen 3 and extended shocks.

Yep, I second that spacers plus the +2 terrafirma would be risky with standard bags particularly on the rear where the +2 inch shock makes 3 inches extra extension. So the standard bag would extend an extra inch over normal even with 50mm spacers... So even more risk added to using air bags off road. I'm paranoid enough even though I have all the bits and pieces to limp home.

Peter.

Longer shocks and gen III's will pop bags! I popped Gen III's with standard shocks, so going any longer would be even riskier! Plus the added spring rate at higher ride height without spacers would rattle your teeth!

The reasons for the lift IMO is:
- Added ground clearance with comfortable (and bag-friendly) spring rate

- Wheel travel maximisation (currently under review at my end)

- Ability to fit larger diameter tyres in the future.

Cheers
Keithy