Another option is the King Springs KTRS-79. I've installed these and when unloaded, my rear pressures are a bit lower than optimum, however they're great when the beast is loaded and/or towing a trailer with decent drawbar weight...
...context and additional updates - somebody from King Springworks did get back to me confirming all I need to do is ensure the product code is KTRS-79 and they are compatible with the 2007 regardless of what the vendor is saying.
The context:
I've just added steel front & rear bumpers, and...
...context and additional updates - somebody from King Springworks got back to me confirming all I need to do is ensure the product code is KTRS-79 and they are compatible with the 2007 regardless of what the vendor is saying.
The context:
I've just added steel front & rear bumpers, and have a...
...sourcing parts for this project. Managed to find some shocks and ahc spring. King on the background is what the truck is on now. They are not ktrs-79. But blue KTRR-CB131 for lc200. They are soft, but no plans for ahc use. This guy was scammed by mechanic to change out front shocks only to...
...is not sufficiently corrected by a spacers (which causes pre-loading of the springs), then more spring rate is necessary, such as with King KTRS-79 springs.
You already understand the Height Control Sensor readings -- but to set it out again for anybody else who comes this way ....
Suggest...
...and drawer system in the back. I don't usually pack heavy and it's typically two adults and a dog in the back. Suspension is AHC with King KTRS-79 coils and AHC torsion bars. I checked my AHC pressures yesterday and the back was 5.7 MPa (well within spec) and the front was 7.8 MPa (outside of...
...I decided to order new globes + AHC fluid to address part of the problem. (just arrived a few days ago). I booked in car for new kings (ktrs-79) springs…and probably went over the top but ordered airbag man bags too (thought it can’t hurt and will leave them run pretty much flat unless I’m...
My rear pressure with the KTRS-79 springs is 4.8, and the AHC seems happy with a big load on board + trailer ball weight. No spacers.
https://forum.ih8mud.com/threads/ahc-pressures.1138174/page-2#post-14991889
...fluid ok, 12 gradations H->N->L, and about to organise a flush, then globes replacement in 10,000ks or so. Rear springs are King Springs KTRS-79, we occasionally tow a camper trailer with ~200kg ball weight.
My front pressures are too low, and my rear pressures are low.
Q1 - The best way...
...spacers and springs you can use to compensate for additional weight while keeping pressure within spec.
I found that fully loaded (armor, camping gear, etc)my rear AHC pressure was on the high side 8.1MPa, and have ordered a set of king springs Ktrs-79. There are other options for heavier loads.
Thanks! They're definitely a tight fit. Mods for this are:
1 inch spacers
1 inch body lift
1 inch sensor lift
2 inch sensor lift on back with King KTRS-79 springs (because I'll be towing)
Trimmed mud flaps
Trimmed front bumper
5mm trim on the pinch weld (didn't need to do the full thing)
...and consider what to do about Rear AHC pressures if necessary – spacers, or new OEM springs, or upgraded springs, or airbags (maybe King KTRS-79 springs already are in place (?), in which case expect low AHC pressures and a slightly more firm ride when there is no load in or on the vehicle)...
...over the 24 years, 400,000 kilometres of life of the vehicle. Presumably, the necessary checks and adjustments were made when KING KTRS-79 Rear springs were fitted? If AHC pressures have remained within the FSM-specified ranges, then AHC presures should not be a problem. I have KTRS-79...
incredible post! thank you so much for taking the time to reply! invaluable info. i will definitely adjust the rear sensor heights and do the cross-leveling - i'm guessing my measurements explain why my Front Right tire is wearing so much more than the Front Left!
...specifications.
In answer to your questions, note also that upgraded springs (or torsion bars) with a higher spring rate (such as KING KTRS-79 coil springs) do not increase the ‘ride height’ of the vehicle. ‘Ride height’ is controlled by the Height Control Sensors and the Suspension ECU...
...on the spring rates are summed up below
Name
Rate
Free Length
OEM 100 AHC Rear Springs
90 lbs/in
OEM specs say ~19 inches
King KTRS-79
130 lbs/in
17 3/8 inch (after 2 years of use)
80 Series LX450
150 lbs/in
D 18 1/2, P 17 1/2 inches (used springs)
80 Series LC
170 lbs/in
Didn't...
I have not read this read through, so forgive me if its covered.
Not sure your ID and length, but the eibach motorsports catalog or the OME spring catalog may be your friend. Find your own rate and length to meet your needs.
https://eibach.com/us/rt-2-catalog-downloads.html
OME spring...
...with AHC are as follows (from memory.... no longer from memory):
Name
Rate
Free Length
OEM 100 AHC Rear Springs
90 lbs/in
Didn't record
King KTRS-79
130 lbs/in
17 3/8 inch
80 Series LX450
150 lbs/in
D 18 1/2, P 17 1/2 inches
80 Series LC
170 lbs/in
Didn't measure when I had them out
I believe, if you're at stock height, the KTRS-79 springs will handle vehicle load fine. They may be shorter, but they are also stiffer so don't compress as much with the standard weight on them. Ditto with extra load in the rear.
But, I added 2" poly spacers to my rear when I added the...
Refreshing the topic.
How come the KTRS-79 springs (free coil height 430 mm) can fit plug-and-play TLC AHC rear coils (500 mm free spring height)?
Isn't it going to drop the standrd height on the back a bit, then?
Trying to get more AHC occasional load here (max +150 kg) so thinking about...