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Tech & Fab
Propane engine builds (tech, questions, advice)
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<blockquote data-quote="huff75" data-source="post: 257639" data-attributes="member: 5275"><p>I will be running my 460 on propane. What I did was mill the heads down to raise the compression. I had hardened seats installed on the exhaust side. Which was a good time to go with a cobrajet size valve (1.76). The valves I got are stainless. The intake side is a stock valve as I was told that only the exhaust needs to have the hardened seat. I then called Scott Johnson at RHP and told him what I was doing. He custom ground a cam for my setup. I will be initially running a single mixer but will add a second on at some point. Will be running a set of Scorpion roller rockers also. I also got a recurved distributor that will bring in the timing quicker because of the higher octane. I dont have the truck together yet but Scott estimated it to have around 400 HP and 500 TQ and it should all come in by 3500 rpm.</p></blockquote><p></p>
[QUOTE="huff75, post: 257639, member: 5275"] I will be running my 460 on propane. What I did was mill the heads down to raise the compression. I had hardened seats installed on the exhaust side. Which was a good time to go with a cobrajet size valve (1.76). The valves I got are stainless. The intake side is a stock valve as I was told that only the exhaust needs to have the hardened seat. I then called Scott Johnson at RHP and told him what I was doing. He custom ground a cam for my setup. I will be initially running a single mixer but will add a second on at some point. Will be running a set of Scorpion roller rockers also. I also got a recurved distributor that will bring in the timing quicker because of the higher octane. I dont have the truck together yet but Scott estimated it to have around 400 HP and 500 TQ and it should all come in by 3500 rpm. [/QUOTE]
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