Polyairs for 78 Series Troopy
Submitted: Friday, Jan 21, 2005 at 00:28
ThreadID:
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Member - John (Vic)
Thinking of fitting a set of Polyairs to the rear of the Troopy to help with a bit of bottom sag when heavily loaded or when towing the work trailer.
I have been told they help with stability etc "Is this the case?" Any comments or advice would be appreciated.
I note they advertise two types for the 78 series, Red ones for about $300 and Black ones for about $700 any advice as to the pro's and con's of either model appreciated.
Reply By: V8troopie - Friday, Jan 21, 2005 at 01:20
Friday, Jan 21, 2005 at 01:20
John, I'm curious about the rear end sag on your 78 series. I drive the 75 series and it does not overly sag with the 250kg load on the towball when I hitch on my boat.
The springs got reset many years ago before going on a CSR trip but nothing had changed since on the spring shackle angle.
Do you have a large rear mounted long range fuel tank and perhaps two spare wheels on the back too? If so then the Polyairs might help. I thought about fitting some but would have to remove some spring leaves too to make them worthwhile for everyday driving.
Klaus
AnswerID:
94194
Follow Up By: Member - John (Vic) - Friday, Jan 21, 2005 at 01:36
Friday, Jan 21, 2005 at 01:36
Hi Klaus
It's actually a bigger problem with the trailer thats what first started me thinking of Polyairs.
I was also under the impression that they would provide a bit more stability and some degree of lift giving me more clearance between the bump stops with a load for 4wding.
Hence I am interested in peoples thoughts and experience with them.
Why would you have to remove some leaves ? my understanding was they would fit straight on.
FollowupID:
353195
Follow Up By: V8troopie - Friday, Jan 21, 2005 at 01:47
Friday, Jan 21, 2005 at 01:47
Hi
John,
you asked "Why would you have to remove some leaves ? my understanding was they would fit straight on."
When you just drive around town (not towing heavy trailers) the standard
suspension is already rather stiff so that the addition of polyairs would do nothing for driving comfort. Removing a leaf or two makes the adjustability of the Polyairs more useful. This is what I was led to believe, others might have a different opinion on that.
Its not because they need extra room to fit.
Klaus
FollowupID:
353198
Follow Up By: Member - John (Vic) - Friday, Jan 21, 2005 at 01:55
Friday, Jan 21, 2005 at 01:55
Klaus another thought would be to lower the pressure in the Polyairs when no load support is required, therefore utilizing the original
suspension and negating the leaf issue, Does this sound reasonable ?
FollowupID:
353199
Follow Up By: V8troopie - Friday, Jan 21, 2005 at 02:04
Friday, Jan 21, 2005 at 02:04
Sure
John, sounds reasonable to me - if it is reasonable to have a$700.- gadget under the car doing nothing :-)
Come to think of it, my troopie has expensive locking diffs fitted, doing nothing for most of the time :-))), very reasonable, LOL
Klaus
FollowupID:
353200
Follow Up By: Member - Davoe (WA) - Friday, Jan 21, 2005 at 10:17
Friday, Jan 21, 2005 at 10:17
v8 troopie, difference between your 75 and a 79 is the length of the spring. Toyota lengthened the leafs in the 79s to give a better unladen ride and they claimed it would not greatly effect carrying capacity, but there is definitly a difference. most load carrying 79s have heavier duty spings with at least 2 extra leaves
FollowupID:
353222
Follow Up By: toymn8r - Saturday, Jan 22, 2005 at 13:55
Saturday, Jan 22, 2005 at 13:55
John
I was thinking along similar lines myself.
Would a small shackle lift on the rear do the job and still allow the leaf setup to work properly?
I have a 78 troopy with rear wheelcarrier and have noticed a drop in the rear as soon as the wheel carrier was fitted.
Bart
FollowupID:
353369
Reply By: Wombat - Friday, Jan 21, 2005 at 12:59
Friday, Jan 21, 2005 at 12:59
Hi
John,
When we lifted the Triton we added Polyaires for towing the camper trailer. Apparently for some vehicles there is a choice of general purpose (red) or heavy duty (black). If you put the two side by side the stronger construction of the black ones is fairly obvious, but only you will know whether the additional $400 is justifiable for your application. They are very easy to fit, even a mug like me can do it, and after sales service from Polyaire in
Sydney is excellent. Upon inflation for the first time it was obvious that there was a fault in the construction of one of ours and it was replaced with no questions asked.
The trick with them is to inflate to the maximum of 30psi (no higher!) prior to hooking up the trailer and then lower them until you're happy with the height. With the huge towball weight on the Silhouette camper I run them at the full 30psi. After you are finished towing simply lower them to the minimum 5psi (no lower!) and you don't know they are there. I have left them at 30psi on occasions in the Buckland Vallet for the additional clearance but the ride does tend to get a bit "choppy".
Overall, I think they are a great product. Just make sure if you do fit them that you don't cut the air hoses too short but allow enough additional hose for movement.
AnswerID:
94258
Reply By: Richard Kovac - Saturday, Jan 22, 2005 at 15:05
Saturday, Jan 22, 2005 at 15:05
John
I've been thinking of using these Firestone airbags they use them on the NDC Ute's and troopys over here in the west they have them in kit form and are made the same as large truck airbag
ride-rite
AIRBAG MAN
Unit 1, 126 South Pine Rd. Brendale Queensland
Australia
Tel: 07 3889 6556 Fax: 07 3889 6557
Email: info@airbagman.com.au Regards
Richard
AnswerID:
94404
Reply By: kesh - Saturday, Jan 22, 2005 at 15:46
Saturday, Jan 22, 2005 at 15:46
Like many of the others I have the "black" Polyair bags under the 75 trayback. They do all and more that any respringing could do, 20psi for an easy ride, 100psi for 5 drums in the back and still a level ride. Same if you have a heavy front on trailer. Mind you, I dont know what sort of back yard mob Toyo. get their springs from! Even the 79's are sagging from nearly new.
Mine are 5 yrs. old, no problems.
AnswerID:
94409