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Engine SwapEverything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.
forgive me here but the 350 I’m swapping in my 84 Z28 has an open style air cleaner. Would it be possible to reinstall the factory dual snorkle set up the 305 came with? Or is that too restrictive? Probably asking why I want to consider that, I dunno to preserve some of the OE look I guess. Holley 650 carb on the new motor if that means anything. Open to other ideas as well but that new air cleaner is UGLY!
How much power will the new mill make? There are tradeoffs for both. With the open element you get plenty of air, but it is hot air. The snorkel assures cooler air, but maybe slightly restricted. If the new motor doesn't make that much more power, the dual snorkel system is probably fine. You can also use your butt dyno to feel if there is a difference.
Considering the air cleaner on an original LT1 (350 with 6,500 rpm redline and 780 cfm carb) was more restrictive than the HO set up, you will be fine, and getting cooler air.
If it's yerbasic 4150 or 4160 like a 1850, or a 3310, or an actual high-perf one, it won't fit. It'll hit all sorts of parts of the top of the carb. However if it's a 4165 or 4175 (spreadbore) such as a 6210, then yes it will. Can't tell in the photo.
How much power will the new mill make? There are tradeoffs for both. With the open element you get plenty of air, but it is hot air. The snorkel assures cooler air, but maybe slightly restricted. If the new motor doesn't make that much more power, the dual snorkel system is probably fine. You can also use your butt dyno to feel if there is a difference.
probably in the vicinity of 350hp, so about triple what it had stock. I’m not a fan of open cleaners like that so if I can ditch it I will. I can’t find what type of Holley it comes with. Crate motor from Chevy. 350/347 turn key if that helps
Last edited by 19eighty4_z28; Jan 19, 2024 at 05:26 PM.
