DSMTalk Forums: Mitsubishi Eclipse, Plymouth Laser, and Eagle Talon Forum banner
41 - 60 of 358 Posts
Erik- how are the new turbo and propane testing coming along?

Thanks,

Joe

ps- here is some info from 3si.org:

3000GT/Stealth International Message Center > General > 3000GT/Stealth International > New Propane kit on web page
 
Discussion starter · #49 ·
Joe:

I haven't had too much time to play with the car these past few weeks because of other obligations. The new turbo and reg. are on though so there is nothing stopping me from continuing the Propane testing.

DSMman and I are both going to the dyno again in 2 weeks (I think) so I should be able to get some before and after number from the car. The main thing I want to document is the difference in power at the same boost level with and without the propane.
 
greenstreak said:
The main thing I want to document is the difference in power at the same boost level with and without the propane.
That will be intersting to see, BUT the main purpose of Propane is to run MORE boost on pump gas... not the SAME boost with leaned out fuel settings.

The whole point is to use Propane as a "cheap" source of octane boost to allow boost levels over that which you can normally run on pump gas...

IMO, the real deal would be to MAX out your current fuel set up on pump gas... dyno it... then turn the propane on and see how many more pounds of boost you can add "safely" ... then dyno it again and obviously, it should make more power because you are running more boost.

Propane = High Octane Fuel
Boost = Air

More Air + More Fuel = More Power :D
 
In school today(UTI) we learned about propane, here are some facts.
Advantages over gasoline- lower emissions - higher octane rating (125:D ) - Less engine deposits then gasoline- cleaner burning

Disadvanages over gasoline- high pressure tank - lower BTU's per gallon.
LPG= 92,000 BTU's GAS= 115,000 BTU's

Hope this helps :cool:
 
BTU is an ok approximation of a fuels energy content. Higher BTU fuels usually also burn hotter (a bad thing, decreasing boost threshold).

What am I saying? Its a very complicated give and tank.
 
Jason@boost* said:
In school today(UTI) we learned about propane, here are some facts.
Advantages over gasoline- lower emissions - higher octane rating (125:D ) - Less engine deposits then gasoline- cleaner burning

Disadvanages over gasoline- high pressure tank - lower BTU's per gallon.
LPG= 92,000 BTU's GAS= 115,000 BTU's

Hope this helps :cool:
Just to clarify that is not a R+M/2 octane rating, and you are NOT running straight propane so the diluted effect combined with an R+M/2 rating make the effective octane much much lower.
 
I was under the impression that the biggest gain from propane was from the cooling of the intake charge (much like alcohol or water injection), and that the higher octane was just an added bonus. Am I off base here? I can't wait to see the results once greenstreak gets a chance to do some testing.
 
venom42 said:
I was under the impression that the biggest gain from propane was from the cooling of the intake charge (much like alcohol or water injection), and that the higher octane was just an added bonus. Am I off base here? I can't wait to see the results once greenstreak gets a chance to do some testing.
I think you have it backwards. :D
 
Discussion starter · #56 ·
I will be doing this as well. My goal is to run as much boost as safely possible with the propane injection. I want to do some pulls at the same boost level with and without because I have been asked by quite a few people to do that.

turboniam said:


That will be intersting to see, BUT the main purpose of Propane is to run MORE boost on pump gas... not the SAME boost with leaned out fuel settings.

The whole point is to use Propane as a "cheap" source of octane boost to allow boost levels over that which you can normally run on pump gas...

IMO, the real deal would be to MAX out your current fuel set up on pump gas... dyno it... then turn the propane on and see how many more pounds of boost you can add "safely" ... then dyno it again and obviously, it should make more power because you are running more boost.

Propane = High Octane Fuel
Boost = Air

More Air + More Fuel = More Power :D
 
venom42 said:
I was under the impression that the biggest gain from propane was from the cooling of the intake charge (much like alcohol or water injection), and that the higher octane was just an added bonus. Am I off base here? I can't wait to see the results once greenstreak gets a chance to do some testing.
The biggest gain is from the higher than pump gas octane rating. A small side effect is from cooling
 
migamb said:
What about this kit?

Click Here
The ebay info summary said: "The Mizer is a two stage design with two flow rates. One for idle and one for off idle."

It is thus totally different than the turbo specific kits. But, maybe with a Hobbs switch and some rewiring it might be made to work. Someone a lot smarter than I would have to figure out the details.

Joe
 
41 - 60 of 358 Posts