Monday, Dec 18, 2006 at 21:09
Andrew,
Wheeley's vehicle is a 3.1 litre factory turbo diesel Isuzu MU.
As way of somewhat independent varification I'll offer my take on what he's done.
First,
Seat of the pants.
The bloody little MU goes like a scalded cat.
It tows a trailer long enough to be continued, enough axles to nearly call a road train and enough weight to satisfy most any test.
Varifiable,
The MU travelled 750km on a tank in factory trim. With the addition of the mentioned Water/Methanol kit it now does 900km to the tank.
Note: I've no idea the capacity of an MU tank but an approximate 20% range increase is impressive to this sceptic!!
Wheeley also holds the before and after dyno readouts he speaks of. The best part is they are from the same dyno on the same day. That makes them pretty credible within the bounds of atmospheric variation!
How does his kit work?
It has a pressure switch that measures manifold pressure after the turbo. It then injects the 50/50 Methanol/Water mix on an increase in manifold pressure.
What other equipment does it use?
It has a windscreen washer bottle to hold the mix, a pump to inject the mix. A jet in the manifold to meter it and I think from memory a solenoid at the jet to prevent "dribbling" of the mix.
Further advantages,
It very much drops the inlet and exhaust gas temperatures whilst it's injecting. To me, anyone with an aftermarket turboed diesel would definitely benefit from this system.
Why? One of the bains of the aftermarket turbo under load are high Exhaust Gas Temperatures. This system certainly cures that problem.
In Ian's (Wheeley's) defence I'd suggest he's very passionate about things he knows work and equally passionate about things that don't work.
This from my limited experience is one system that really needs an open exploration.
Hope that clears up some of the questions you have,
Geoff
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