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How smart is the J20A engine? Can it make use of 95/98 fuel?

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TheOtherLeft

Joined: Sun Aug 27, 2006 11:30 pm
Posts: 818
Location: Sydney

Posted: Sat Jan 03, 2009 2:33 am

Since petrol is getting quite cheap now I'm starting to think about using premium petrol again.

Can the J20A ecu advance the timing if using premium petrol, or does it have to be advanced manually?

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Saam

az supporter

Joined: Mon Jun 12, 2006 11:30 pm
Posts: 2068
Location: Sunshine Coast

Posted: Sat Jan 03, 2009 5:25 am

i notice a huge difference with my G13BB they are around the same era efi so there is my guessing advice.

Damo

az supporter

Joined: Sat Jul 22, 2006 11:30 pm
Posts: 4661
Location: Brisbane

Posted: Sat Jan 03, 2009 12:37 pm

Mmmmmm J20....

I don't know how the management on these things works exaclty, but unless it has a knock sensor I can't see the ECU changing the ignition timing outside the maps programmed into it's memory. My guess would be that you'd have to advance the timing manually.

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Scrawny

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Joined: Tue Jan 29, 2008 10:30 pm
Posts: 10528
Location: Brissie
Vehicle: Popemobile

Posted: Sat Jan 03, 2009 6:26 pm

You'll probably find the timing can't be adjusted. It will run better on premium though, and you'll get better economy too.

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