Necropost!
So... I've got my hands on a pair of 95L/Hr HHO generators (chinese acrylic flame polishers) I've just done flow testing on the pair and I can fill a 1L bottle in a touch over 20seconds or about 2.8L/min of HHO. Total power consumption for this output is ~600watts. This is powered from mains, not the alternator so there are no extra loads on the engine for this test.
The 'experts' in the HHO field tell me between 2 and 4 Litres/minute is enough for up to a 5L petrol motor. It has been suggested that I use no more than 0.25L/min in the old 1.8L pulsar. Any more will cause the piston to work harder when compressing the air/fuel mix. I'm not sure if the engineers of these kits know how an engine works, or even basic math.
So i've done a little bit of my own math. My 1.8L puslar at 5000rpm consumes 4500 L/min of air assuming 100% VE. at 2.8L/Min of HHO, that is 0.06% concentration. At the recommended 0.25L/min at ~3000rpm when cruising this is about 0.009% HHO in the airstream.
The experts also tell me, adding this small amount of HHO will increase torque and HP by up to 50%. Fuel economy will not improve unless I disable O2 correction.
I've got the old pulsar strapped to the dyno now, with HHO machines on the standby. Just putting a bit of charge in the phone to record the dyno results.
Plan is, 3 dyno runs to get the engine and trans nice and warm, 3 dyno runs with one HHO machine on (1.4L/min), 3 dyno runs with both HHO machines on, 3 runs with the HHO off. If the last test shows significantly more than the first, I'll do the test again. I know my 18LE motor puts out more power when the oil temps are higher.
O2 correction will be disabled as per the experts suggestion.
If there are ANY gains, I'll then do some steady state tuning at 2000rpm and find the best timing and AFR values with HHO vs without.
You'd think with the engine idling, IAC disconnected, you'd see an RPM increase when feeing 2.8L/min of HHO into the intake. I mean, any increase would be reassuring. But no. AFR didn't change at all either at idle with or without HHO.
And the cost? the 'best' kit on the market from Perth is $4800 not including postage. It produces 2-4LPM from only 15amps at 12volts. This is suitable for up to a 5L petrol motor. No, he will no loan a system for dyno testing. He said he's done his own independent economy and power testing himself. No dyno graphs are available. Only anecdotes.
What do you think? Will .009% of HHO produce more HP than 8psi of boost? I'll post the video's on my instagram. Watch along here:
https://www.instagram.com/p/Cu3NolXpTL8/