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What is the proccess for tuning a car on gas? 

 

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 Post subject: What is the proccess for tuning a car on gas?
Posted: Thu Feb 01, 2007 10:52 am 
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I was just wondering how cars are tuned for gas ,how do you know if its running rich or lean. I have an EF dual fuel which gets 330km city driving usable 60 litre tank just wanted know if I should be getting more.
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Posted: Thu Feb 01, 2007 10:57 am 
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Depends on the setup. What are you running? Impco, OMVL, etc. I can show you a quick tune up for OMVL that works a treat.

Impco's are know to go out of tune pretty quickly. OMVL's are normally pretty god and don't need much if any fiddling with once set. If you are getting around 16l city and 10 highway then I would be happy with that.

cheers
Scott

 

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Posted: Thu Feb 01, 2007 1:22 pm 
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I think its Impco I will have to check tonight.On the Fuel Economy Calculator i get 18 litres per 100 KM.
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Posted: Thu Feb 01, 2007 5:41 pm 
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Its a 'landi renzo'
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Posted: Fri Feb 02, 2007 12:04 pm 
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im also getting roughly the same economy and i have an airod converter

any1 ahve any info on them or how to tune?
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Posted: Tue Feb 06, 2007 11:01 am 
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Speak to Joe at Crescent in Liverpool ... he fits a lot of Airod systems.

 

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Posted: Thu Feb 15, 2007 8:34 pm 
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i get 15-16ish L to the 100k, city driving in heavy (perth) traffic and I consider myself to have a pretty heavy foot.

 

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Posted: Wed Feb 21, 2007 2:53 pm 
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i get 11-12l per hundred, and 16l /100km towing, i have given it 2 deg extra static advance and i dont bother with the petrol now, you can give it more timing as long as you use a 98 ron fuel

thats and eaII with a dodgy old impco.

 

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Posted: Wed Feb 21, 2007 2:57 pm 
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i dont believe that mine was doing around 18-19. now that ive got a new sys im not sure yet

 

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Posted: Thu Feb 22, 2007 12:39 am 
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Ive got a OMVL setup on my car, ive had it on the dyno for it to be tuned, didnt need any tuning, the gas that is, it is at its optimum setting. Im getting 400 to and tank used to get around 460 but i have a heavier foot now.

When it was on the dyno, we did a few runs on gas and petrol, and it is only down 1 KW on gas compared to BP ultimate 98, so im pretty happy with that.
But i think petrol still has that little bit more noticeable pull quicker to rev kinda thing. This is all on a stock motor apart from catback at moment. Im chucking extractors, and cold air setup on soon, and hopefully a cam.

At the moment the mixer is butted right up against the throttle body, when change all my intalke piping over, if i move the mixer further down the intake piping, to try and get some more flow going will this be a benefit? ive heard it will help but im nt sure.

So can i advance the timing? how far can i, and what should i expect from it? Il prob repalce leads and plugs before i go playing around with timing

 

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Posted: Thu Feb 22, 2007 3:39 am 
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fairmont4me wrote:
At the moment the mixer is butted right up against the throttle body, when change all my intalke piping over, if i move the mixer further down the intake piping, to try and get some more flow going will this be a benefit? ive heard it will help but im nt sure.

So can i advance the timing? how far can i, and what should i expect from it? Il prob repalce leads and plugs before i go playing around with timing


moving the mixer away from the T/B is a good idea as it gives the LPG and air longer to mix.

can advance timing 5 degrees or so depends, alot of this is done by ear and a few runs down the street to access any performance increase. remember tho ULP will ping if to far advanced

 

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Posted: Thu Feb 22, 2007 11:44 pm 
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when its on petrol i only use BP ultimate 98 anway. I havent really played around with timing much, a bit of a run down on changing it? il need to grab a timing light from work

 

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Posted: Fri Feb 23, 2007 8:34 am 
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Dizzy Timing for LPG for dummys

step 1. loosen 13mm bolt, so can just move dizzy
step 2. turn dizzy in clockwise direction a little at a time....
step 3. take for thrash down the street...better
step 4. no ping see step 2 ping see step 5
step 5. turn dizzy back counter clockwise....
step 6. tighten 13mm bolt
step 7. run on ULP to check

 

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Posted: Sat Feb 24, 2007 1:10 am 
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how much is a little?, il prob put some 9mm leads and xr6 plugs as there a colder plug, when i start playing with the timing and that

 

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2006 Model Pioneer Headunit
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Boot install in progress
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Fully Adjustable Shiftkit
Lukey 2 1/2 Inch exhaust one muffler, no resonator

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Posted: Sat Feb 24, 2007 2:18 pm 
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1-2mm would be a couple of degrees advance.

cheers
Scott

 

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