Lpg Liquid Injection - Part 1

[danielsan]

check your PM's

[HSV Listy]

Where is the ICU located. Might be silly question but I can not see much in my bay.

[danielsan]

mines just behind the coolant resevoir, next to the passanger strut tower, has two big grey plugs on the top.

[ratter]

any chance of the link here also?

Thanks

[T2000]

Just a quick update.

I take no responsibility for the correctness of this info and how you may choose to use it - it was sourced from a German forum (thanks to Danielsan) and was translated by Google Translation tools.

This appears to be a picture of the internals of one of the ICU's.

There is a switch block which can be configured as follows:

DIP1 DIP2 DIP3 DIP4 time

OFF ON ON ON 55 sec.

ON OFF ON ON 30 sec.

ON ON ON ON 5 sec.

OFF ON OFF ON Mono.

I will try to find some time to check out my system and verify that the above info is relevant to our system. I probably wont get time until the end of the week though.

Regards

Chris

[johnnyk]

The purging will NOT occur if the engine is not running. This is because it is illegal in Australia to have LPG fuel circulating through an engine bay in these conditions. The purge time for the ICOM JTG system is always around 45 seconds on our particular install.

What do you mean by circulating through an engine bay in these conditions??

[ratter]

The law states that gas can only flow for a very short time unless the engine is cranking or running, the time would not be enough to purge the system

[danielsan]

Below is a pic of one of the ICU boards from my car. The other is identical but has the 3.5mm jack on it. You'll see it has no DIP switches...... Interestingly when i went to pull mine apart, it appears someone had already done so, 1 screw and 2 washers were missing.



For anyone else who's interested the site is lpgforum.de/icom-jtg

[Oztrack Tuning]

I just tuned a LS1 VX GTO manual, that was fitted recentlyt by Kurt near Wollongong with the latest liquid injection system. It made 260rwkw which is a new record on the dyno i use for stock cammed LS1s.

It had an OTR and a full exhaust as well.

The owner is very pleased and the car drove nicely.

[HSV Listy]

I just tuned a LS1 VX GTO manual, that was fitted recentlyt by Kurt near Wollongong with the latest liquid injection system. It made 260rwkw which is a new record on the dyno i use for stock cammed LS1s.

It had an OTR and a full exhaust as well.

The owner is very pleased and the car drove nicely.

That is a good result steve.

PS: FYI the was running much better after the alternator went in. It was jinning more stuff around than the afr too. The idle now sits lower again but still ticks over but a tad low, it seems to rev much better and stronger and the change over from tps fueling to map is now seemless too. Can not believe a playing up alternator can cause so many changes. There is a fair load on the battery with all the stuff running. Thanks for all the time you spent on it so I apreciate that. Just need to get the petrol fuel pump in Thursday and get a dyno run done Friday to double check the afrs again. Next track day if a few weeks away so I will get some data to you.

[REV-IT]

I got one of those JTG systems put into my VE GTS on Friday--could not be happier. After driving around town over the weekend managed to achieve a figure of 16.4 lt per 100km. This seems to be very similar figure for running on 98 octane petrol. And the power is up!

[johnnyk]

Below is a pic of one of the ICU boards from my car. The other is identical but has the 3.5mm jack on it. You'll see it has no DIP switches...... Interestingly when i went to pull mine apart, it appears someone had already done so, 1 screw and 2 washers were missing.



For anyone else who's interested the site is lpgforum.de/icom-jtg

Any idea on how to connect to the thing to change the timeout?

[LuisS]

I got one of those JTG systems put into my VE GTS on Friday--could not be happier. After driving around town over the weekend managed to achieve a figure of 16.4 lt per 100km. This seems to be very similar figure for running on 98 octane petrol. And the power is up!

Glad to hear !

I reckon there's still a few Kw to be gained - shoot me a PM once you've done your 1000 or so Km

Luis

[danielsan]

Any idea on how to connect to the thing to change the timeout?

It turns out i may be a bit wrong but trying to translate some of that german to english is quite hard even with . It looks like the 3.5mm port is a diagnostic port only. The purge time is "hardwired" in, but i can't get hold of the schematics for the board so i cant play around with it.


On another note, i had the backseat of the car out yesterday and driving along the LPG pump sounds like a boeing 747 coming into land it also didn't turn the pump off when it ran out of gas and auto switched back to petrol. i can't imagine this would be doing my "747 sounding" pump any good. It does turn the pump off if i manualy change fuels....

Unfortuntely i now live 300kms away from the closet JTG installer so i cant even get them to check it out...

[REV-IT]

APS Luis -- PM sent