I'm told tuning a petrol engine for straight gas you should be able to get equal/more power then tuned for straight petrol.
I'm just curious, does the size of the mixer have any effect on the performance of the engine --> obviously it regulates the amount of gas that's being "mixed" into the engine, can it be too small for the engine, and as such limiting the power?
I'm just curious cause my timing is already on like 15' advanced and it's got noticably less balls then the same engine/car/gearing etc running on petrol with probably 8' advance (factory tuning for 88 RON fuel).
More or less, mine should go as well/better, but it feels like it's choking/running out of puff before the other one does on petrol.
Notice: We request that you don't just set up a new account at this time if you are a previous user.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
Recovery:If you cannot access your old email address and don't remember your password, please click here to log a change of email address so you can do a password reset.
LP Gas Performance
Moderators: toaddog, TWISTY, V8Patrol, Moderators
gas
Yes and no , there is a guy down that has a r8 club sport on gas and is producing more hp then running it on premium . http://www.abc.net.au/newinventors/txt/s1345083.htm
hope it helps, mate got a quote of 2700 for his ford. but yet to go in to production.
bj
hope it helps, mate got a quote of 2700 for his ford. but yet to go in to production.
bj
Yes, an engine built for straight gas will make more power (if tuned properly of course). However, like oils aint oils, gas's aint gas's. And every now and then you get a batch that can have up to 40% butane. This tends to bring the octane rating back down to about 98ron. Pure propane has an octane rating of 104.
Yes, its important to fit the right mixer and right converter for the capacity/horspower application. If the mixer cant sense the air-flow properly, it doesn't create an accurate vaccum for the converter to deliver the right amount of gas. Also if an incorrect gas converter is used it cant send the right amount of gas anyway. The size of the converter is more important than the mixer, depending on the brand. But if you get the right package it just make things so much more clockwork. Any lpg fitters workshop will have the manuals and charts to see which setup best suits your engine.
As for your timing, i think you MAY have it a little too far advanced for lpg. This will rob you of power. To make the most out of higher octane fuel it is better to increase your compression ratio than advance the timing 180 degrees.
Yes, its important to fit the right mixer and right converter for the capacity/horspower application. If the mixer cant sense the air-flow properly, it doesn't create an accurate vaccum for the converter to deliver the right amount of gas. Also if an incorrect gas converter is used it cant send the right amount of gas anyway. The size of the converter is more important than the mixer, depending on the brand. But if you get the right package it just make things so much more clockwork. Any lpg fitters workshop will have the manuals and charts to see which setup best suits your engine.
As for your timing, i think you MAY have it a little too far advanced for lpg. This will rob you of power. To make the most out of higher octane fuel it is better to increase your compression ratio than advance the timing 180 degrees.
\m/
That's interesting cause 8' advance is factory tuning for 88 RON petrol.
You can run 15' on pump gas fine, so I was actually thinking it was advanced enough and one of the other guys on this board used to run 18' on pump gas with no pinging.
When you take that into account and the fact that LPG burns slower then petrol, (and as a result it needs to be advanced further to get any sort of power out of it), you'd expect 15' to be pretty safe.
I'll take it into the local gas shop like you said and see what they say about it.
Might try bumping the timing up another few degrees and see if it pings or not.
Cheers for the info
You can run 15' on pump gas fine, so I was actually thinking it was advanced enough and one of the other guys on this board used to run 18' on pump gas with no pinging.
When you take that into account and the fact that LPG burns slower then petrol, (and as a result it needs to be advanced further to get any sort of power out of it), you'd expect 15' to be pretty safe.
I'll take it into the local gas shop like you said and see what they say about it.
Might try bumping the timing up another few degrees and see if it pings or not.
Cheers for the info
I'm running about 20' on a chev - strait gas and the dissy is calibrated for it, as a result the timing doesn't advance as much at high revs as it would for petrol, however it runs a lot more initial advance.
petrol - less initial advance but ramps up more with revs
gas - more initial advance but doesn't increase a lot with revs
therefore if you're set up for petrol and advance it heaps it'll probably run well on gas but ping in the top end - maybe
petrol - less initial advance but ramps up more with revs
gas - more initial advance but doesn't increase a lot with revs
therefore if you're set up for petrol and advance it heaps it'll probably run well on gas but ping in the top end - maybe
There are no stupid questions, but there are a LOT of inquisitive idiots
Who is online
Users browsing this forum: No registered users and 2 guests