After 2 years of inactivity i thought i better write another blog posting, goodness knows where the time has gone, but were still going strong!
Looking at my last postings, one referred to the Cooper STT tyres i put on the Oilybits truck, well, that was now 45,000 miles ago and their whopping 18mm of tread has been reduced to 5mm, so were back on the tyre trail, though theres still probably 5,000 miles of tread left in them. The great news is that the Cooper tyres have lasted an unbelieveable amount of time, and were exactly as i was told, sticky, great on road and off, quiet, self cleaning, and with solid walls, not one tyre has needed attention in the whole time they have been on the truck.
Typical of me though, i want to go one better than before, so im going to try and get 33" tyres on the beast, the sad news is that Cooper dont do the STT in 33x10.50R15, and their 33x12.50R15 are too wide for my Stock '7J' rims, which i like too much to change, so we need to change to BFGoodrich Mud TA KM/2 33x10.50R15. The KM/2 is supposed to be a better tyre than the KM/1 which had mixed reviews, but looking at the tread these are going to be noisier tyres than the Cooper STT's due to the tread spacing, and this will mean they will reduce fuel efficiency. The Cooper STT's had a more equal tread spacing across the tyre making them quieter and more economical. The only other visual negative is the tread is only 13mm deep, compared to the STT's 18mm.
At the same time as bigging up the tyres i wanted to uprate the suspension but have drawn a blank on this, i bought some KSI (KS International Ltd) Coil Springs and some KSI 0079224 Leaf Springs
www.ks-international.com via a third party advertising them both as "Uprated", however, having received these, and measured them in comparison to the originals, they are nowhere near as strong as the stock Toyota Suspension, so I have returned everything for credit. The comparison measurements are below for anyone else considering an upgrade using KSI parts, as far as i know KSI parts are the only parts which are sold by some agents as "Uprated" for the MK6 Hilux (KSI say they are direct replacementS), I also tried Bilstein but they have discontinued their uprated kits due to low demand. The only other providers are based in Australia and are extremely expensive, so we wont be uprating the suspension this time.
Original Toyota Coil Spring - 16.60mm Wire Gauge, 10 Coils
KSI "Uprated" Coil Spring - 15.85mm Wire Gauge, 9 Coils
Original Toyota Leaf Spring - 5 Leafs, 8mm, 8mm, 8mm, 12.5mm, 10.5mm, total thickness 50.5 mm
KSI "Uprated" Coil Spring - 5 Leafs, 7.3mm, 7.3mm, 7.3mm, 7.3mm, 16.8mm, total thickness 48.3 mm
Although i did not compare the springs in any mechanical test, i believe it is virtually impossible for the KSI parts to be in any way stronger than the originals, just from looking at the above figures, so beware agents selling these as "Uprated" - they are not, they are at best comparable to the original equipment, at worse, slightly less strong than the original equipment. If KSI or one of their agents selling these as "Uprated" can prove to me otherwise then i will gladly buy them again and edit this posting.
One thing i did buy and keep was Monroe Adventure GAS shocks for the rear, the originals are a Gas/Oil mix, but i can see one is knackered and is leaking oil. The Monroe shocks do look a lot thicker in the body, and have good reviews, so they may offer some, albeit minor ride quality difference. I sprayed these black as their stock yellow colour is a bit tacky.
So, the total kit list for this mod is 1x "Readylift"
www.readylift.com 69-5055 suspension lift kit, to lift the front end 2.75-3.00", and the rear 1" to accomodate the bigger tyres, 1x pair of Monroe Adventure Gas Rear Shocks, and 5x BFGoodrich Mud TA KM/2 33x10.50R15 tyres.
My mods list for the near future includes a winch and snorkel, but i need to design a bespoke laser cut steel bracket to accomodate the winch as i dont like winch bumpers, so this will have to wait for a bit.