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Old 06-21-2022, 03:42 PM   #2
Old and boxy but good.
dl242gt's Avatar
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.

I had that restrictive efi intake tested when my cylinder head was modified. The efi intake took a large amount of flow away from the intake flow. After reading your post it makes sense to me that the exhaust with the 38mm valve didn't show as much improvement as I expected. I had a 405 head improved with stock valves and the 531 head got the 38mm exhaust with the same flow work. I forget the numbers but it wasn't that much more flow. It's in the spreadsheet that Gary made up.

Edit:That home brew flow bench is neat. Nice work!
1982 242 turbo. 338k miles. MVP/ BNE coilovers and 3" exhaust. Flowed 405 with a V15T. Cossie turbine housing with upgraded compressor housing. With wildly uncontrolled wastegate. 90+, IPD remote oil filter. Some other goodness, too. Restored in 2k. Now ready for a 2nd restoration.

1993 245 Classic, 440k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.

Last edited by dl242gt; 06-21-2022 at 03:44 PM.. Reason: add comment
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