Hi Doc,

Thanks for the compliment, I just happen to have a friend who has a ASNU system, so that I can test and play with it when I'm bored

Actually, I've tested 10 (ASNU allows me to test 8 at a time) and selected only the best 5 to be installed onto my coop However, 2 of the injectors failed to operate at a pressure higher than 4 bar and 2 sprayed significantly lesser fuel at high operating speed(3 ms) Lucky me If it weren't for the tests I've conducted, I'll never know what killed my coop

Cheers,

David
ps: I'll post pics and results of testing at different pressure and duty cycle

Very interesting - if I had the time or the money I'd be tempted to chuck the 20VT injectors back in and see what they can give. We already know my engine is capable of almost 400bhp on pump fuel, so it would be interesting to see how close I can get without the bigger 16VT injectors.

Having said that, the bad low speed running has now been sorted, and Iceberg tracked down the low speed fan issue, so the ECU won't play around with the maps as much when the temps go high (apparently when the ECU sees over 100 degrees it changes the maps to preserve the engine)

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Just did a search on Google and this thread came up I am intrigued to see that you have flow tested the standard injectors and found them to be capable of 440cc at 100% duty

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The standard measurement for injectors is at 80% duty/ 3bar so that doesn't suprise me. Almost all tuners say don't go above 90% duty. That's why I am one of the people who believes you can make 380+BHP out of the stock injectors.

You may be able to work out your duty if the acr reader gives you some info.

Nigel,

It's interesting to know that the ecu will cripple the engine when the coolant temp goes higher than 100. With Barnacles widget, it seems to suggest that the high speed fan kicks in when the coolant temp reaches 103 degrees, do you konw when does the low speed kick in?

I think with 20VT, leaning the cylinders a bit will not cause detonation that easily, coz our phase transformer (aka valve timing variator) shuts off a higher revs (4800 for stock chip and 4000 for novitec), leaving the intake to open and close later (8-54), so the piston is already traveling down at higher revs, therefore, even if there is a few knock, it will not be as devastating as the normal car- where the intake opens before the TDC (huge intake and exhaust overlap).Furthermore, the exhaust is already closed(40-0), so even if the restrictive exhaust results in higher exhaust pressure, this pressure will not be a problem at high revs, when the timing variator closes