twin turbo
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
I'd run that one by the folks over in the IDI forum: Pre-Power Stroke Diesel (7.3L IDI & 6.9L) - Ford Truck Enthusiasts Forums
Hotshot
Joined: Jul 2008
Posts: 11,231
Likes: 130
From: Thomasville, GA
A PSD isn't a IDI...
Senior User
Joined: Mar 2009
Posts: 151
Likes: 0
From: Diamond, Ohio
I cant see why it would not handle any less than 40psi without any problems, i know its a different beast than the psd but compression is much higher in a idi, still the same block more or less....
Postmaster
Joined: Jan 2010
Posts: 4,319
Likes: 4
From: Elk City, OK
totally different, the idi and psd blocks are nothing alike. the cylinder walls are very thin on the idi, thats why the idi is prone to cavitation and the psd isnt.
Lead Driver
Joined: Apr 2008
Posts: 6,938
Likes: 13
7.3 15 lbs, 6.9 10. Studded the 7.3 20-25 and 15-20 for the 6.9. PSD have something like 19.5-1 CR vs. the 6.9/7.3 IDI is 22 and 21-1. Decompress em and you can add that much more boost. IIRC they will handle something like a 65-1 corrected compression ratio.
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