How Much Boost?

[GM Duraturd]

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.

[jfines@cox.net]

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.

[GM Duraturd]

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.

[PSD0389]

I can hit 26 psi with my truck with all the mods listed in my sig

[twildman]

Originally Posted by GM Duraturd

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.

[SuperDuty73]

JFines you should only get moreboost with your exhaust done, since it relieves backpressure letting the turbo spool quicker and higher.

[lukecline]

Originally Posted by GM Duraturd

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

[Stroked95]

Mine only makes 45 in the daily driver setting, what did you do to this chip Tony? lol I really need headstuds

[SuperDuty73]

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?

[sldghamr]

i have a stock 96er, 5psi @ 65mph. the best i have been able to do is 16psi.