105 Series Landcruiser (non ABS model) PDI Dual Diaphragm Upgraded Brake Booster
105 Series Landcruiser (non ABS model) PDI Dual Diaphragm Upgraded Brake Booster
Braking upgrades should be done in conjunction with power increases and we have found the biggest improvement can be achieved with this mod and PDI brake boosters will give a 50% increase in booster ratio over the standard brake booster. In fact any other changes would be minor compared to our booster upgrade, unless you are replacing damaged or non-functioning systems.
Our PDI dual diaphragm brake boosters have been ADR tested and proved to pass all tests. Our design allows us to exceed the standard brake specifications for those with:
increased weight (both GVM and GCM).
larger wheel diameter
Following installation and adjustment of the rear brake bias the braking distance at 80kph dropped from 26m to 16m. Very quickly we found we could do turning and stopping maneuvers that would have be both crazy and impossible before. This is great for a powered up cruiser and potentially life saving if you have increased your weights or are towing. Many will say “the brakes are fine” but when asked if the pedal goes hard, before full braking can be achieved, they remember how scary that can be.
By changing to a smaller double diaphragm booster the effective push on the pedal has decreased by 80kg under heavy braking. By increasing the diameter, which has made the whole unit larger and increased the effect to 180kg. Considering it is likely the normal push, with a PDI brake booster, would be under 50kg for full braking, this is a significant improvement that will be noticed.
These boosters are impressive, and we are sure every cruiser owner would install after driving a cruiser fitted with one of these boosters.
We recommend these be installed with braided brake lines as line pressure will be increased and the standard lines may be compromised if still original. This is both due to age and the potential for damage as they are fitted to a 4WD. Installing braided lines will also give a better result as factory flexible lines bulge and reduce effective application of the pedal.
