Outer Limits 4x4 Board

Hi guys i have a SWB on Gas/petrol and need have been timing it to 10.
The car runs on gas 99% of the time it only ever runs on petrol to get to a servo or every 3 months or so we run it on petrol for a 20kms or so to lube the seals or something. I'm not sure if u are ment to time them more advance then 10 to run on gas?

If it's been on 10 what do u suggest remebering it's barlely ever driven on petrol unless needed.

Not sure if making the timming more advanced will make the car go better ???

Cheers guys

up to 15degrees advance at idle makes it more spritely on gas but i found it pings its ass off on unleaded mind you the unleaded has probly been in the tank since christmas. I was told not to do this with the factory dizzy instead have a petronix electrical unit fitted with a specific LPG curve to suit.

Oh ok so with factory ignition and timming what do u think i should set it at?

I was thinking of getting that Petronix ignition with the flamethrower II at a later daye as i'm replacing the engine as we speak with another TB42 done 180,000KMS instead on the engine right now done 427,000KMS and never with a rebuild or anything

Does advaning the timming from 10 or higher make any performance increasement or anything like that?

And when you said when you run it on fuel it ping it's head off will thise cuase any damage to the engine or anything?

The only reason i'm is becuase maybe i could get this going a little bit better thought advancing the timmign a bit will make it go a bit better becuase when i ran it on fuel the other day it went better on fuel then gas thought this was werid or is this normal but like i said i never use fuel so why have it tunned to it rather have more HP with gas

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I dont really understand your post. Did you read it????
Sounds like you'd better off taking your car to a mechanic as advancing your timing if you dont know what detonation is will most likely see you finding another TB42.
If you are not sure leave it at 10 deg they run fine.

all the gas cars i have owned 3 vaccum advance is blocked you dont need advance with gas set timing so it runs fine block vaccum advance see how it gos

Mine is set at 15 degrees and runs great on lpg and petrol. Mine is efi.

cheers guys yeah i have mt timming on 13 maybe 14 not exactly sure bit hard to tell

Can have timming this advanced cause damage to anything also it doesn't ping on gas not sure on petrol haven't tried.

I have my timing on 17 degrees with the vacuum advance connected.It doesnt ping on petrol (when i use it).I disconnected the advance and i felt like it wasnt as responsive.
I was told this setting by 2 LPG fitters in Newcastle.

ok sweet man i just don't want start melting things lol

run ur timing a couple of degrease above factory timing with ur vacuum advance connected, also put some new spark plugs in but get non- resisted ones and gap them down to .8 to .9mm gap and get ur gas tuned and it should run sweet and this will help stop the chances of backfiring, just remember that u gas doesnt like to run more than 35 degrees total advance (thats including centralfugal advance)

Ok thanks man u wouldn't know how much it would cost to get someone to tune my gas for me around about and anyone on the sunshinecoast might now of someone that does a good job maybe?

Cheers Rick.

hay champ ive got a mav gq swb duel fuel. timing on mine is set at 18 deg advanced and dosent ping on juice runs like a dream.

355G60 wrote:hay champ ive got a mav gq swb duel fuel. timing on mine is set at 18 deg advanced and dosent ping on juice runs like a dream.

have u got electronic ignition or any other bits added to the motor / ignition, like larger exhaust or extractors?

I have Pertronix Ignitor and mine runs well on about 14

EricB wrote:I have Pertronix Ignitor and mine runs well on about 14

thats what i am running but i had timing set at 15 and it ran fine, i think now its on about 12-13

I'm going to look into getting a petronix ignition anyone found any improvements from points to the petronix they claim to make a bit more power jee i hope so