compressor wheel
Tuned
Joined: Aug 2006
Posts: 405
Likes: 42
I understand the benefits of using this "fooler" you guys are referring to, but what I dont understand is the possible ramifications of using it. My thinking is if the PCM is defueling, the turbo is spinning at, for ease of explaination 95,000 rpm. If you make the PCM believe there isn't as much boost then it throws more fuel to it, you end up spinning the turbo at 115,000 rpm's, thus making more boost than the 23 PSI. Now, if the turbo isn't designed to be able to handle the added speed the chance of it scattering is greatly increased. Does this make sense to anybody else?? Thinking outside the taco shell...
Aaron
Aaron
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
I understand the benefits of using this "fooler" you guys are referring to, but what I dont understand is the possible ramifications of using it. My thinking is if the PCM is defueling, the turbo is spinning at, for ease of explaination 95,000 rpm. If you make the PCM believe there isn't as much boost then it throws more fuel to it, you end up spinning the turbo at 115,000 rpm's, thus making more boost than the 23 PSI. Now, if the turbo isn't designed to be able to handle the added speed the chance of it scattering is greatly increased. Does this make sense to anybody else?? Thinking outside the taco shell...
Aaron
Aaron
when the EGT's go to high like in towing, and some don't therefore the gauges you need to watch. With a tuner you can make your stock turbo hit 30psi which is not good for it. Thats why people in stall other turbos. The 38R is a direct replacement without any extra work. Not all like that turbo and use others. Anyway more air usually means lower EGT's with correct tuning, still need gauges. My 2cents, Chet
Cargo Master
Joined: Aug 2009
Posts: 2,137
Likes: 13
From: Glendive, MT
To use a blowoff type valve successfully in the map line, you need a orfice between the intake and the blowoff valve. That way it is not blowing off all your manifold pressure, just enough to trick the map sensor.
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Tuned
Joined: Sep 2011
Posts: 399
Likes: 1
From: Ness city Kansas
if i am not mistaken it will still defule with a 38R if u dont have a fooler the 38R is on my to do list but i did buy a different type of fooler from riff raff heres a link Riffraff Diesel: OCR - Overboost Code Regulator this does not bleed off boost it just regulates the pressure to the mapp sensor which i believe is a heck of a lot better than just blowing good boost pressure off to the atmosphere and think when i do buy the 38 R it will be very useful
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
heavy up a hill. So yes and no. The tuner will ask for higher boost levels to go with the new fuel curves being used. More boost, fuel, HP and hopefully wider tork range. Without the fooler the PCM will defuel before you can get the hole advantage out of the tuner. At least a custom tuner.Chet
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