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Dual fuel or straight LPG onto a Big Block
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Greetings All, I would like to hear the experiences of anyone running a big block on LPG either dual fuel or solely. I have 425ci BB Olds being installed into my 1972 Cutlass ( Olds equivalent to Pontiacs GTO ). Once the BB swap has been done I have the vehicle lined up of LPG conversion but i am still not sure whether it will run okay on duel fuel. its running an edelbrock 4bbl carb. your thoughts invited. my thank in advance Gary T www.hdhrholden.comwww.oldsmobilesdownunder.com |
Gary T
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i spoke to a guy once who had a 454 in a HQ 1 ton to tow his tri-axel trailer bobcat and it was his daily driver. he had twin throttle body gas research set up on it. (he modified a XC GS bonnet into a HQ bonnet frame to keep it all under the bonnet, Edited by user Wednesday, 4 February 2009 9:58:32 AM(UTC)
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Adam,
Yes, I have run twin throttle body GRA previously on the 308 ... and it was great.
My 1967 pillarless 4 door Oldsmobile Delta 88 will (hopefully) be back on the road this year running the same set-up on its 463ci Olds big block... I cant wa |
Gary T
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the edelbrock carbs are simular to the rochester.
i have never brought one, but i think the edelbrocks are available in 600, 700 and 800 cfm or thereabouts.
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i would like to see the pics of the engine bay. the local gas guy here said going straight gas is better than duel fuel. but he did say the on a 454 you need twin carb set up and single doesnt supply enough gas to feed a motor that size. years ago i seen
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if he comes back 400hponlpg is brilliant with lpg related stuff, im sure he could size you an appropriate setup to go and research.
I know one thing though, he will tell you to ditch the dual fuel, and build appropriate for lpg ONLY.
greenhj
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forget Gas reasearch, its over priced and not very user freindly, get a holley base plate and an adapter to run 2 X impco 425s and youll never look back
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Your Edelbrock Carb will have a number on the front of it.
1404 500cfm
1405 600cfm
1407 750cfm
1412 800cfm
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Thanks to all for your thoughts ... I now have a twin GRA system and will go with that I think. Sorry to those suggesting otherwise. Gary T www.hdhrholden.comwww.oldsmobilesdownunder.com |
Gary T
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i have single gra on 308
was told twin is to big for stock 308???
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Why be sorry to make up your own mind? you asked for sugestions you researhed them and chose, its your car and your desigion to make no one elses keep us posted on the results
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Yeti,
You are right ... no sorrys required.
I will certainly let you all know how things turned out.
Vintageholden - from what I have een told the GRA throttle bodies are 400-500cfm and the Rochester on a 308 is 650-700cfm so a pair of GRA bodie |
Gary T
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Dual fuel or straight LPG onto a Big Block
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