Modify OBS PCM to run SD tunes?

Ferdy Mint

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We have a 1996 OBS F250 with a 2000 SD motor and intercooler transplanted into it. Right now a NAW6 PCM controls the motor and the E4OD. We got a Hydra and tunes from RiffRaff and found that it won't allow the 60 or 80hp tunes, because it's an OBS PCM.

We have a spare OBS TDE1 PCM on the shelf. Could I send that to a tuner and have it modified to think it's an SD PCM, but still run the E4OD tranny? I keep hearing good stuff about Jelibuilt and 1023.
 

sheepman

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Did you contact riffraff about your issues? I don't remember who programs PCMs anymore, there are differences in the SD & OBS PCMs, things like processor speed and memory to name two. Some one with more knowledge about that kind stuff of corse would know better than I would. Tony Wildman (Total Diesel performance) programs those PHP Hydras too.
 

greenskeeper

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What injectors are you running? I'll assume they are single shots to be working with the OBS PCM?

You're limited by injector size regardless IMO so I would just run the tuning that's available for that PCM.
 

narmalee

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We have a 1996 OBS F250 with a 2000 SD motor and intercooler transplanted into it. Right now a NAW6 PCM controls the motor and the E4OD. We got a Hydra and tunes from RiffRaff and found that it won't allow the 60 or 80hp tunes, because it's an OBS PCM.

We have a spare OBS TDE1 PCM on the shelf. Could I send that to a tuner and have it modified to think it's an SD PCM, but still run the E4OD tranny? I keep hearing good stuff about Jelibuilt and 1023.

really? my 97 Hydra does just fine, or is there a diff between PCM's 96-97?
 

narmalee

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96-97 would be the same. But OBS to SD are different. Furd/Navistar revised the PCM entirely for the E99 and later. Not interchangeable.
Was gona say, Jelibuilt did tow + 80 and 150hp tunes on mine, and its a 97... but didnt know if maybe there was a diff
 
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