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Forum: 7.3L IDI (Non-Powerstroke) Diesels   03-20-2012, 10:23 AM
Replies: 31
Views: 80,534
Posted By FordGuy100
OBS PSD's have large exhaust housings, and take...

OBS PSD's have large exhaust housings, and take some rpm's for the turbo's to spool. Couple that with compression around 17.5:1, and the IDI with 21.5:1 compression allows the IDI to eat an OBS on...
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