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2020 Fiat 124 Spider Abarth
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OK, here's a new question, I measured the OD of the existing hoses and they were 5/8" so I assumed the ID was 3/8" and that's what I bought. I noticed in the pictures above that you used 5/8" ID hose. Any real advantage to a larger hose here? Theoretically you would get more air flow, but isn't the PCV a sometimes open thing anyhow?
PCV is 5/8" but intake is 3/4". The factory hose has 2 different ends on it. I picked up a 19mm (3/4") can on aliexpress and ran a 3/4" hose from can to intake and 3/4" from can to a 3/4" to 5/8" reducer and 5/8" hose from reducer to PCV (about 6" 5/8" hose)
 
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2020 Fiat 124 Spider Abarth
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Hmmmm after reading over this it looks like some of you have a 5/8" PCV AND 5/8" intake. Was there a change on the 2020 MY? No way my intake was taking a 5/8" hose. Was tight with a 3/4" hose
 

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2020 Fiat 124 Spider Abarth
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I went with 5/8" because it was the best fit for most of the hose barbs on my PCV box and catch can. It was a bit of struggle to get it onto the one leading to the intake tube.
Gotcha! Just checking to see if there was a change. Had already planned the 3/4" to 5/8" but tried the 5/8" hoping to get a slightly smaller hose on the 3/4" but after about 10 mins I gave up. Wasn't going so went back to my plan of 3/4" intake lol. No more oil in intake and no oil in catch can so I'm happy. I think most of the oil in intake issue is overfill but either way happy now lol
 
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