520 hp 460= 28mpg?
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New User
Joined: May 2001
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520 hp 460= 28mpg?
although this isn't in a truck.
It's in a aussie Ford XC falcon coupe and yes thats right its got a 520 hp and 460 pounds of torque @4800 rpm with 14.7:1 compression and runs a custom LPG setup
28mpg not bad for a 460 big block :-)
It's in a aussie Ford XC falcon coupe and yes thats right its got a 520 hp and 460 pounds of torque @4800 rpm with 14.7:1 compression and runs a custom LPG setup
28mpg not bad for a 460 big block :-)
Senior User
Joined: Jun 1999
Posts: 140
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520 hp 460= 28mpg?
May 2001 Car Craft. 529HP and average torque of 524!! I am copying part for part. Watch out for that 67F100 shortbox boys!! 28mpg? Only in your dreams on a carb! More like a max of 8! Depending on your stall that is! 
Mountain Pass
Joined: Jan 2001
Posts: 229
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520 hp 460= 28mpg?
Ahh, but Tex... remember, it's running of an LPG systemm. 
Best stuffage on earth!
And hey, im getting 14 miles/gallon off my holley 750! It's all in the tuning, man!!!!!!!!
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Best stuffage on earth!And hey, im getting 14 miles/gallon off my holley 750! It's all in the tuning, man!!!!!!!!
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Senior User
Joined: Jun 1999
Posts: 140
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520 hp 460= 28mpg?
Man, I hope this isnt a totally stupid question, but whats an LPG system? And I just hope I am able to tune mine as well as you evidently have. Also hope I can break into the 13s!
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Senior User
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520 hp 460= 28mpg?
hey, i was gonna wait and let someone else with more knowledge answer that one because im not really sure about it. but since noone has responded, ill take a stab at it. im fairly sure its just a liquid propane set up. get a huge tank in the bed and then modify the induction system to run with it... im not sure what all that entails, but i know you also have to mess with the timing to get it to run straight. ive heard that when running straight propane compared to gasoline, on an equal playing field...the propane will get impressive efficiency comparatively, but that it will be drastically underpowered. however, turbocharging would go a long way in making up for it. i suppose i could see getting into the propane stuff....very interesting...
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Mountain Pass
Joined: Jan 2001
Posts: 229
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520 hp 460= 28mpg?
Yea...... Sorry it took so long. I been on vacation since the 13th.
LPG stands for Liquid Propane Gas. Propane compressed under pressure until it turns liquid.. You know that stuff you screw into your camp stove or lantern or what have you? Same stuff.
Yes, LPG is VERY efficient. converts something like 80 percent of it's usable energy into work (in an engine) or something like that. It's really very cool stuff.
Friend of mine had an f-150/5.0HO with an LPG/gasoline system.. he was getting like 26-28 mpg and running high 13's... Try that out of a stocker! Then he proceeded to wrap it around a tree... poor truck 
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
LPG stands for Liquid Propane Gas. Propane compressed under pressure until it turns liquid.. You know that stuff you screw into your camp stove or lantern or what have you? Same stuff.
Yes, LPG is VERY efficient. converts something like 80 percent of it's usable energy into work (in an engine) or something like that. It's really very cool stuff.
Friend of mine had an f-150/5.0HO with an LPG/gasoline system.. he was getting like 26-28 mpg and running high 13's... Try that out of a stocker!
Then he proceeded to wrap it around a tree... poor truck J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Tuned
Joined: Feb 2000
Posts: 309
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From: michigan
520 hp 460= 28mpg?
isn't it true also that when an engine runs on propane gas set-up like this, your oil changes are greatly lenghtened. so instead of changing every 3,000 miles you can go twice or even 3 times longer before changing, or even longer. i heard of this years ago from a friend who's uncle had a jeep set-up like this.. C.J. let me know i'm curious...
Mountain Pass
Joined: Jan 2001
Posts: 229
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520 hp 460= 28mpg?
Thats what I'ave heard as well.. Due to the different burning characteristics of LPG, the carbon deposits in the engine oil are greatly reduced. This lets you lengthen your oil change period considerably... probably best to still change every 6-9 thousand miles or so.
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Senior User
Joined: Aug 2000
Posts: 205
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520 hp 460= 28mpg?
hey guys, could anyone give some specific details on how to convert? what all exactly do you have to mess with...or could you just "plug and play" so to speak? a twin turbo'd big block running on propane sounds like the ultimate in original and innovative projects. i remember there was a guy awhile back who was gonna twin turbo a big block with propane..does anyone know what ever happened with that?
Posting Guru
Joined: Oct 1999
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From: yes
520 hp 460= 28mpg?
14.7:1 compression is how he is getting most of his milage, I believe the ratio is for every point of compression you get 15% better gas milage, so figure most people get 9:1 compression in their 460 his is 14.7 so at 15% better efficiency for every point compression he's 85% more efficient just by compression alone...
Mountain Pass
Joined: Jan 2001
Posts: 229
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520 hp 460= 28mpg?
I remember hearing about that, but after a while he just kinda "dropped off the earth" with it.. Havent heard anything since. He has a good Idea though..
It is feasible to run a twin turboed LPG system..However there are a lot of delivery problems one would have to work around..
No,unfortunately it's not just a "plug and play" type of thing.. you have to recalibrate most everything. Hey.. that would be a nifty experiment though... Run a bottle of LPG into a valve, and run the tube into the manifold..... Mmmmmmmm... Cheapskate Nitrous system? Or would one "Lose His Heads?" Maybe I'll try it on my Chevette....... HEHEHhahaahah not worth saving anyhow.
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
It is feasible to run a twin turboed LPG system..However there are a lot of delivery problems one would have to work around..
No,unfortunately it's not just a "plug and play" type of thing.. you have to recalibrate most everything. Hey.. that would be a nifty experiment though... Run a bottle of LPG into a valve, and run the tube into the manifold..... Mmmmmmmm... Cheapskate Nitrous system?
Or would one "Lose His Heads?" Maybe I'll try it on my Chevette....... HEHEHhahaahah not worth saving anyhow. J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh