Thread: Lifted P38 on air - questions

Apologies for the dual conversations; it's all related though!! And like Kiethy's and Peter's efforts, myself and others are benefiting - thanks!

Peter; you were saying the spacers for yours are 22mm on the front, and 32/12mm on the rear. Are you running any extended bumpstops?

I think i've got the front sorted. But i'm trying to make use of every mm of travel.

So far I have a 1 inch spacer ontop of the front bags, and a 1inch solid bumpstop block bolted to the axle.

On the rear; 28.5mm on the rear of the spacer, and 22.2 on the front. This gives me an inch (25.4) in the middle and lifting the angle of the piston by 1/4 inch. With a 1inch solid bumpstop block. I'll also lowering the top shocker bracket 1 inch.

Hopefully I can get away with a 1/4 inch foward lean on the bottom piston at what should be oem clearances within the bag... if that makes sense.

I'm a little dissapointed that in real life i can only seem to get an extra 1 inch on the front, and 2.1 inches on the rear out of the gen3s. On paper they have 2 and 3.5 inches over OEM, but with the extra diff rotation not so in real life.

I'll also have to see what eventuates from this chaffing issue; however, the spacers being ontop of the bag should fix it.

Hopefully seeing the cnc plasma guys tommorow...

Originally Posted by benji

Apologies for the dual conversations; it's all related though!! And like Kiethy's and Peter's efforts, myself and others are benefiting - thanks!

Peter; you were saying the spacers for yours are 22mm on the front, and 32/12mm on the rear. Are you running any extended bumpstops?

I think i've got the front sorted. But i'm trying to make use of every mm of travel.

So far I have a 1 inch spacer ontop of the front bags, and a 1inch solid bumpstop block bolted to the axle.

On the rear; 28.5mm on the rear of the spacer, and 22.2 on the front. This gives me an inch (25.4) in the middle and lifting the angle of the piston by 1/4 inch. With a 1inch solid bumpstop block. I'll also lowering the top shocker bracket 1 inch.

Hopefully I can get away with a 1/4 inch foward lean on the bottom piston at what should be oem clearances within the bag... if that makes sense.

I'm a little dissapointed that in real life i can only seem to get an extra 1 inch on the front, and 2.1 inches on the rear out of the gen3s. On paper they have 2 and 3.5 inches over OEM, but with the extra diff rotation not so in real life.

I'll also have to see what eventuates from this chaffing issue; however, the spacers being ontop of the bag should fix it.

Hopefully seeing the cnc plasma guys tommorow...

Unfortunately my focus went elsewhere for some time now so all the bits are sitting there waiting to be installed.... Just got to prioritise it. I started off keen and moving forward, just lost the momentum in this upgrade.

Think I've done a locker, front bar, winch, dual battery, boot wheel carrier/bracket since starting this lift and stopping at it's install.

But like you I'm really hoping to not extend the bump stops to keep the articulation as much as possible but it is looking like I/we'll have to...

I'd be prepared to check the contact by lifting the rhs rear wheel with no air in the rhs rear bag to see if the two touch... Although not sure how I'll check this. Maybe try it with no bag in place and measure I guess. Wish I had a blown rear gen 3 bag to put in place just to see if the two parts touch.

But hitting a bump stop on cornering is what concerns me more. and not sure how to reenact that without destroying something.

Be interesting what Keith and others say about their angle once it was all installed. Would they reduce it if they did it again or leave it as is. I'm sure its better for the full droop and protecting the bag, but is it too much for highway and standard mode?

Sean

I've just crawled out from under the car after making a couple of measurements. It looks like I may only need around 10mm additional length on the panhard rear bar. Trying to find 2 fixed points on either side that I could get a 30cm ruler or calipers in wasn't as easy as I thought it would be

Gary

Originally Posted by davidsonsm

Good result. You should have a reasonably low cost solution.

Have you actually measured the offset of the axle at the higher heights? Are you going to centre the axles for highway height or standard height?

Have you given any thought to moving the front axle forward - via spacers on the radius arm?

I think we've got the angle perfect! In low the piston sits just forward of vertical, it seems like in standard and high that its practically vertical and at full droop its just off vertical again.

Wouldn't change a thing in regards to spacers!

Cheers
Keithy

Originally Posted by mtb_gary

Sean

I've just crawled out from under the car after making a couple of measurements. It looks like I may only need around 10mm additional length on the panhard rear bar. Trying to find 2 fixed points on either side that I could get a 30cm ruler or calipers in wasn't as easy as I thought it would be

Gary

Gary, 10mm offset was what I measured in standard height at the rear. Not too bad really. I put a piece of timber across the outer tyre surfaces and measured the distance to the axle, attempting to ensure the same points were used. Measuring from underneath is probably better though.

The front is harder owing to the converging chassis rails.

Originally Posted by Keithy P38

I think we've got the angle perfect! In low the piston sits just forward of vertical, it seems like in standard and high that its practically vertical and at full droop its just off vertical again.

Wouldn't change a thing in regards to spacers!

Cheers
Keithy

I agree. The angle of the rear spacers seems bang on. My rears are something like 40mm high at the front and 60mm at the rear - 50mm centre. Giving a slope of 5 degs top and bottom.

I decided to do a lap of town in normal height yesterday, just for a comparison now it's sitting higher. I think I prefer it up there over the low height.

Ride quality is much better in normal height over imperfections and there is less body roll.

I think I'm a contender for panhard rod extensions!

Cheers
Keithy

Keith

Week after next I should have mine on. Full report with pics of course. As it turns out it's only around 10 mm to extend but I'm sure it's going to change things for the better.
On another note hopefully you guys are ok up in N.Qld, it looks like another cyclone building off the coast. Down here on bribie island at the in laws it's just very humid compared with Perth .

Gary

Originally Posted by Keithy P38

I decided to do a lap of town in normal height yesterday, just for a comparison now it's sitting higher. I think I prefer it up there over the low height.

Ride quality is much better in normal height over imperfections and there is less body roll.

I think I'm a contender for panhard rod extensions!

Cheers
Keithy