Fordmods Logo

LPG Timing 

 

Page 1 of 1 [ 10 posts ] 

 
 Post subject: LPG Timing
Posted: Tue Oct 28, 2014 6:37 pm 
Stock as a Rock
Offline

Age: 26

Posts: 100

Joined: 22nd Apr 2012

Ride: Ford EL

Location: melbourne
VIC, Australia

Hi,
I have an duel fuel EL and i advanced my timing to about 7-8 degrees and its so much better but i run mostly LPG and i want to know how much i can run up to?

Thanks
Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Wed Oct 29, 2014 6:40 pm 
Getting Side Ways
Offline

Posts: 973

Joined: 15th Nov 2004

Ride: el wagon

Location: melbourne
VIC, Australia

Spend $200 with T.I. performance. All done for you!!
Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Wed Oct 29, 2014 9:42 pm 
Stock as a Rock
Offline

Age: 26

Posts: 100

Joined: 22nd Apr 2012

Ride: Ford EL

Location: melbourne
VIC, Australia

I want to know the degrees i can go up too with LPG
Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Thu Oct 30, 2014 12:24 pm 
Getting Side Ways
Offline

Posts: 973

Joined: 15th Nov 2004

Ride: el wagon

Location: melbourne
VIC, Australia

Not worth the hassle to experiment. With the chip, it's all done for you, and I reckon, from experience, that it was the best $200 I ever spent on the car.

If you advance the timing it is always advanced, thus, when you don't need it advanced, e.g.: higher revs, it is all out of kilter. With the chip, it advances when required, and the retards when not needed. With the anti knock sensors, you really don't know when you are too far advanced, as the computer tries to retard it. Quite a bit of valve damage can be done if you are not too careful.

Personally, wouldn't try to advance the stock timing, even on LPG.
Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Thu Nov 06, 2014 9:36 pm 
Stock as a Rock
Offline

Age: 26

Posts: 100

Joined: 22nd Apr 2012

Ride: Ford EL

Location: melbourne
VIC, Australia

So could i go to 12 degress on LPG?
Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Thu Nov 06, 2014 11:20 pm 
Moderator
Offline

Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

CrACk InjECtIoN wrote:
So could i go to 12 degress on LPG?


yes... give it a try
Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Fri Nov 07, 2014 8:01 am 
Stock as a Rock
Offline

Age: 26

Posts: 100

Joined: 22nd Apr 2012

Ride: Ford EL

Location: melbourne
VIC, Australia

Ok, and what about when i run the car on 98? will it ping? AS i have Duel fuel and i run 98 and LPG.

So the more advance i do, the more torque i will get on LPG?
Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Fri Nov 07, 2014 8:27 am 
Moderator
Offline

Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

CrACk InjECtIoN wrote:
Ok, and what about when i run the car on 98? will it ping? AS i have Duel fuel and i run 98 and LPG.

So the more advance i do, the more torque i will get on LPG?


its a trial and error thing, try it and see, if it pings on 98 back the timing off a few deg and try again..
if your running duel fuel its a trade off, to get best results with lpg you will have some pinging on petrol, to get best results on petrol lpg will lack power...
Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Fri Nov 07, 2014 2:30 pm 
Getting Side Ways
Offline

Posts: 836

Joined: 1st Apr 2005

Gallery: 4 images

Ride: EF XR6 Wagon, AU2 XR6 VCT

Power: 148 rwkw

Location: Auckland
New Zealand

CrACk InjECtIoN wrote:
So the more advance i do, the more torque i will get on LPG?


It's not that straightforward. Some engines are not knock-limited even at Wide Open Throttle. (And no engine is knock-limited at low load.) If you keep advancing the ignition, you eventually get to the point where torque flattens off then starts to drop sharply (google "spark hook test").

Ignition starts Before Top Dead Centre - ie, while the piston is still moving upwards on the compression stroke. The more you advance it, the earlier it starts. If you go too far, you start creating more pressure on the piston coming up on the compression stroke (trying to push it back down and the crank backwards) than you gain on the piston going down on the power stroke - a net reduction in torque.

And there are other factors too - like, the higher the effective compression ratio, the faster the flame speed, and the less advance you need to achieve max torque.

So, unless you are prepared to pay for a full dyno tune, you really have to do some experimentation to find out what works best for your combination. Or - like everyone is saying - you could gain the benefit of others' experimentation and buy a pre-programmed J3 chip - which costs little more than a blank chip.

 

_________________

95 EF XR6 wagon, 17" FTRs, DBA, QFM, KYB/Koni, AU block, ported EF head, SS Inductions, Territory intake, MLS gasket, milled, Franklin RH24B cam, Coby headers, no cat, Tickford 2.5", 2800rpm stall, J3 chip

Top
 Profile  
 
 
 Post subject: Re: LPG Timing
Posted: Mon Nov 10, 2014 6:07 pm 
Stock as a Rock
Offline

Age: 26

Posts: 100

Joined: 22nd Apr 2012

Ride: Ford EL

Location: melbourne
VIC, Australia

OK, well i have it on 8 degrees and its seems to be ok, no pinging on 98 or LPG?

But i want to know what other people have done on LPG
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 10 posts ] 

Who is online

Users browsing this forum: No registered users and 33 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Thu Dec 14, 2017 5:58 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names