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Go Back   Ford Powerstroke Diesel Forum > Ford Powerstroke 94-98 7.3L Forums > 94-98 7.3L Performance Parts
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  #1 (permalink)  
Old 04-23-2008, 07:10 PM
GM Duraturd GM Duraturd is offline
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How Much Boost?

How much boost does your OBS make. With the mods in my sig I hit 21 psi just punching it on the street from 40 to 60 mph. I expected around 15 max out of the OBS.
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Old 04-23-2008, 07:15 PM
jfines@cox.net jfines@cox.net is offline
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Before I opened my exhaust to a 4" strait pipe with a 3" DP, I could hit that with the chip on high.

Now, I only see 15 psi while towing.

When I get new injectors that will be a different story.
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Old 04-24-2008, 02:40 AM
GM Duraturd GM Duraturd is offline
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So why am I hitting it with a wide open exhaust? 3'' dp, 4'' section(short), 5'' all the way from under cab to stacks.
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Old 04-24-2008, 08:33 AM
PSD0389 PSD0389 is offline
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I can hit 26 psi with my truck with all the mods listed in my sig
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Old 04-24-2008, 09:34 AM
twildman twildman is offline
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Quote:
Originally Posted by GM Duraturd View Post
How much boost does your OBS make. With the mods in my sig I hit 21 psi just punching it on the street from 40 to 60 mph. I expected around 15 max out of the OBS.
Pull the chip off and you will see those numbers.
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Old 04-24-2008, 11:43 AM
SuperDuty73 SuperDuty73 is offline
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JFines you should only get moreboost with your exhaust done, since it relieves backpressure letting the turbo spool quicker and higher.
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Old 04-24-2008, 05:36 PM
lukecline lukecline is offline
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Quote:
Originally Posted by GM Duraturd View Post
How much boost does your OBS make. With the mods in my sig I hit 21 psi just punching it on the street from 40 to 60 mph. I expected around 15 max out of the OBS.
Mine was making over 50....... then i took the chip and nitrous off and now it only makes half that
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Old 04-24-2008, 09:10 PM
Stroked95 Stroked95 is offline
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Mine only makes 45 in the daily driver setting, what did you do to this chip Tony? lol I really need headstuds
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Old 04-25-2008, 11:00 AM
SuperDuty73 SuperDuty73 is offline
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Stroked what have you done to your truck??? What tunes do you have? You make a whole lotta boost there! I hope I can do the same.
Ever dyno your truck? or drag it?
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Old 04-25-2008, 11:16 AM
sldghamr sldghamr is offline
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i have a stock 96er, 5psi @ 65mph. the best i have been able to do is 16psi.
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