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Propane High HP Question
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<blockquote data-quote="Naughty_Finger" data-source="post: 356239" data-attributes="member: 8026"><p>Hey Revelation, I'm not saying it CAN'T make horsepower. I am just saying to do so requires you to go down the propane road and not look back. When I was deciding between propane and efi I read about 100000 posts and even called the got propane guy... I kept reading how great it was and what sold me was you can just slap it on a gas motor and there you go... It's KINDA true.. you can just slap it on BUT doing so you lose power. To make power with propane you need to build the engine FOR propane. The true potential of propane is unlocked with compression. LOTS OF IT.. to get compression you need the right pistons, possibly shave deck, possibly shave heads etc.. When you start running 12:1 or even 14:1 compression the higher octane of propane slows down the detonation which is how you can run so much compression without pinging. You CAN go back to gas but you need VERY high octane racing fuel which is really really expensive compared to propane. Gas and propane are two very different forms of energy. To get the most out of them you need to build the engine accordingly. </p><p></p><p>so back to my first post... you can't take a 500 horse pump gas motor and just throw a single propane carb on it and expect to get anywhere near that HP... You also can't take a well built propane specific motor and put a carb on it running 91 octane and not expect it to ping itself until it explodes. </p><p></p><p>That is the only point I'm trying to make.. guess I didn't explain myself earlier.. sorry. Also another thing to consider is this. I had two 43 lb aluminum propane tanks. I could get a single trail ride out of each of them. I always had to refill at least one to get through the weekend. I realize it's no different than refilling your tank or fuel cell BUT if you have a big gas guzzling engine and you are running high RPM's you need to make sure you have another tank because you can't just borrow some fuel from your buddy to get you back to camp.</p></blockquote><p></p>
[QUOTE="Naughty_Finger, post: 356239, member: 8026"] Hey Revelation, I'm not saying it CAN'T make horsepower. I am just saying to do so requires you to go down the propane road and not look back. When I was deciding between propane and efi I read about 100000 posts and even called the got propane guy... I kept reading how great it was and what sold me was you can just slap it on a gas motor and there you go... It's KINDA true.. you can just slap it on BUT doing so you lose power. To make power with propane you need to build the engine FOR propane. The true potential of propane is unlocked with compression. LOTS OF IT.. to get compression you need the right pistons, possibly shave deck, possibly shave heads etc.. When you start running 12:1 or even 14:1 compression the higher octane of propane slows down the detonation which is how you can run so much compression without pinging. You CAN go back to gas but you need VERY high octane racing fuel which is really really expensive compared to propane. Gas and propane are two very different forms of energy. To get the most out of them you need to build the engine accordingly. so back to my first post... you can't take a 500 horse pump gas motor and just throw a single propane carb on it and expect to get anywhere near that HP... You also can't take a well built propane specific motor and put a carb on it running 91 octane and not expect it to ping itself until it explodes. That is the only point I'm trying to make.. guess I didn't explain myself earlier.. sorry. Also another thing to consider is this. I had two 43 lb aluminum propane tanks. I could get a single trail ride out of each of them. I always had to refill at least one to get through the weekend. I realize it's no different than refilling your tank or fuel cell BUT if you have a big gas guzzling engine and you are running high RPM's you need to make sure you have another tank because you can't just borrow some fuel from your buddy to get you back to camp. [/QUOTE]
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