advance on cng and retard on petrol

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zackpuse
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advance on cng and retard on petrol

#1 Post by zackpuse » Wed Jun 19, 2013 8:10 am

hi all,
i have big problem when setting my gasitaly f1 cng to my 4g92 engine.
first situation on petrol i setting 9 degree btdc my engine give me a good performance.
2nd situation on cng i need to set 12 degree btdc for good performance. but my engine knocking when on petrol.
my setting cng 700 rpm n below running petrol, after 4200rpm run petrol for overtaking.
now i setting 11 degree on cng engine running good but still have problem when have cool weather, on petrol knocking when high rpm.
any suggestion to fix this problem
thanks

Gilbertd
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Re: advance on cng and retard on petrol

#2 Post by Gilbertd » Wed Jun 19, 2013 8:19 am

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zackpuse
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Joined: Mon Jul 02, 2012 3:52 am
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Re: advance on cng and retard on petrol

#3 Post by zackpuse » Fri Jun 21, 2013 6:49 pm

thanks for that info. but i already ask their technical asst and result no timing advance processors suitable for my engine
any other solution
regard

classicswede
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Re: advance on cng and retard on petrol

#4 Post by classicswede » Fri Jun 21, 2013 8:45 pm

How have you been adjusting the timing?
http://www.classicswede.co.uk/LPG/cat17 ... 10800.aspx

LPG installer Anglesey North Wales

DIY LPG Kits

07824887160

zackpuse
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Location: malaysia

Re: advance on cng and retard on petrol

#5 Post by zackpuse » Sat Jun 22, 2013 6:39 am

classicswede wrote:How have you been adjusting the timing?
adjust the distributor refer on timing light to set btdc. just a normal method to basic timing on efi system

classicswede
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Re: advance on cng and retard on petrol

#6 Post by classicswede » Sun Jun 23, 2013 11:45 pm

If it has a distributor then it should be possible to use a advance processor.
http://www.classicswede.co.uk/LPG/cat17 ... 10800.aspx

LPG installer Anglesey North Wales

DIY LPG Kits

07824887160

zackpuse
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Posts: 8
Joined: Mon Jul 02, 2012 3:52 am
Location: malaysia

Re: advance on cng and retard on petrol

#7 Post by zackpuse » Fri Nov 14, 2014 8:55 am

http://www.autogasitalia.it/db/prodotto ... ng&id=1778

how much cost and where i can by this timing advance processor..

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