TiTAN
Suspension
TiTAN Suspension for Toyota Corolla KE70
Day 11 - Humans are Greedy (26th November 03)
Was at TiTAN yesterday. Made serious request to install their 300 psi / 3 inches coil for the rear. Since the front is using 500 psi / 3 inches. The ratio sounds about right.
In kg/mm terms the front is approximately 5.5 kg/mm and the rear is 3.3 kg/mm. They have another one at 4.4 kg/mm.
The current rear coil is not TiTAN's but a near fit "try try" solution because they do not have coils for KE70 and the likes of old cars.
After much nagging TiTAN finally agreed to have a serious look at the rear to make it into coilover. Yippy :) ehhehehehehehhe
Wah so happy...............cannot sleep tonight :) hehehehehehe
Next morning, which is today. Took the 15 inches from the storeroom into the car to replace the existing 13 inches and off to TiTAN reaching just before 10 am. First customer to arrive :)
Quickly drive into working station and wait :) - however work did not start until very late in the afternoon.
There are many obstacles. The coil cannot clear the tower top. It has to be lowered at least 3 inches or 4. This is the rear left, assuming looking forward. The rear right is worst because there is a big chunk of block to hold the pan hard rod. This calls for the complete coilover assembly to be better off up-side-down. However there are brake cables and brake cables' bracket to clear. Again problems.
There were worries the absorber mounting could not take the extra coil's rebound pressure and break. It is pointed to TiTAN that the Japanese and Americans using the famous AE86 manages without additional modification to strengthen anything.
At the end TiTAN persuaded me not to change the rear into coilovers instead install a height adjustable coil kit onto the existing coil seat. This way is faster, safer, easier etc. I gave up and gave in :( no more yippy.
But :) muah ha ha ha ha ha ha h a
As they try their method, they gave up. The top bump rubber stop is too wide in diameter and could not accommodate their coil.
So, coilover it is and the end results: -
Unusual............................
It is using the "INVERTED" technique. Thankfully these local made (MALAYSIA BOLEH) absorbers are "CONSTANT VOLUME" type of technology, therefore it works up or down or sideways. :) phewwwww
The process - pictures for viewing pleasure!
Adjusting coil height is not by the regular gears but "STEP" teeth. This is because the absorber assembly (casing) is re-used. At this stage it is not good to force it into ring gear type. If it's new then it would be the regular gear type.
Luckily TiTAN calculated the coil's initial displacement due to the car's weight and knows where to secure it's position correctly.
This is done by measuring the car's lift (maximum stroke) minus resting position. For this case the rear stroke was 80 mm.
The existing rear coil is taken out and put on a compressing machine and pressured to a displacement of 80 mm. It is found to be around 200 psi. Therefore this is the force due to gravity acting on the coil. Regardless of any coil.
My choice of the 300 psi / 3 inches is then placed on the compressing machine and pressurized at 200 psi. The displacement is then known. This is then made onto the coilover.
The absorber travel is typically given double the lifted to resting stroke. I think.
However the valving is changed according to my request / feedback and the pressurized gas differ. This absorber is around 80% oil filled and 20% nitrogen-gas-pressured. Vacuumed then nitrogen filled.
BTW that's Richard - normally the key person actually making the mods.
Red T-shirt is Mr. How - normally the person liaising with customers.
Test Drive
FANTASTIC :) ................................... This is the TiTAN feel, which was felt from their sample cars.
More to described later..............hahahahahahahaaa muah hahah a MUAH haahhahahaha
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