I read somewhere that the poly engine is more fuel efficient than the later LA engine.
Is that true?
Bill
actually, its quite substantial. Head flow stock for stock features a huge advantage to the poly over the LA. In stock form, they flow over 220 cfm, ported, they can reach 300 cfm. with the port spacing and heights to have a good to great velocity as well. compare that to a stock 318 LA head that maybe 150 cfm max out of stock, 302 style LA heads, 135 cfm out of other swirl port heads. For comparison, a Eddy Victor set of LA heads flow 295 fully ported and polished per Hughes Engines.I don't know about that. It could be made to be efficient. If it is, not by much!
never had them lolScallops? View attachment 1715413519
They should be easy to port with the valve angle and layout. I think the biggest downfall with the LA heads is the shared/dual ports and the pushrod pinch.actually, its quite substantial. Head flow stock for stock features a huge advantage to the poly over the LA. In stock form, they flow over 220 cfm, ported, they can reach 300 cfm. with the port spacing and heights to have a good to great velocity as well. compare that to a stock 318 LA head that maybe 150 cfm max out of stock, 302 style LA heads, 135 cfm out of other swirl port heads. For comparison, a Eddy Victor set of LA heads flow 295 fully ported and polished per Hughes Engines.
Yum!Scallops? View attachment 1715413519
yep, that's what's keeping me from doing it. However, I'm fully set up to setup to a big block pushbutton set up in a matter of hours if I wanted. Personally, I kind of enjoy the WTF is that look I get when people see those scaolloped valve covers.
Someone put a 361 in this car. I added headers, intake, carb and ignition. It ran pretty good.There's the little B Block option too for the effect. Friend had a Fury with a 361. He would put a $20 bill on the dash board and tell the disbelievers to "grab it if you can" and then nail it. He didn't lose a 20 that I know of
yeah. the other thing, the runner and port lengths are exactly the same on the polyThey should be easy to port with the valve angle and layout. I think the biggest downfall with the LA heads is the shared/dual ports and the pushrod pinch.
I have a 383 as well. its stuck but has 13:1 pistons haha.There's the little B Block option too for the effect. Friend had a Fury with a 361. He would put a $20 bill on the dash board and tell the disbelievers to "grab it if you can" and then nail it. He didn't lose a 20 that I know of
yeah. the other thing, the runner and port lengths are exactly the same on the poly
I have a 383 as well. its stuck but has 13:1 pistons haha.
How much difference? My LA teen gets 20/hwy.I agree with the poly getting better mpg, all three that I owned as daily drivers in the '80's did, and I even remember as a kid, a friend of my Dad's who owned one said the same thing.
How much difference? My LA teen gets 20/hwy.
Thats purty. And the valve covers wont leak.
speaking of leaks, I've let that RTV on the intake manifold gasket cure now for 10 days, think it'll be ready to top the radiator off and look for leaks?Thats purty. And the valve covers wont leak.
It wont cure any more after 24 hours. Rtv is room temperature vulcanizing.speaking of leaks, I've let that RTV on the intake manifold gasket cure now for 10 days, think it'll be ready to top the radiator off and look for leaks?
Sealed the complete undercarriage on this 1990 Mini Van Caravan today. Coming up on 30 years old for this vehicle in 2020.
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yeah, I just havent had time to get back to it lolIt wont cure any more after 24 hours. Rtv is room temperature vulcanizing.
I would View attachment 1715413532
My poor baby Dodge, look how it is here today.
Bill
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hows that fire going?My poor baby Dodge, look how it is here today.
Bill
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