does anyone know stock boost of my truck? I stopped buy a shop to get a dtc cleared and he looked up my boost. He was impressed at 9psi.

 

LOL.. 9 might be impressive in a Neon but not in your truck. You should see 30 to 35 pounds of boost on a stock turbo.

 

really? this guy acted like it was great!. he told me sittin still and reaving the engine one might see 5. he said the 9 was PSI but he said another number.....I thought he said 131....it could have been 31though. what would this number be? He said the (131 or 31) first and then converted it to 9psi.

 

just sitting revving the engine isn't going to show anything unless you get the rpm's up enough to spool the turbo. I suppose he could have seen 9 doing that but, that doesn't mean anything. Cruising at 55mph using CC, you would see 9 to 12.

If you are getting onto a freeway merging into traffic, you might step on the peddle pretty good. If you had a boost gauge you'd see it get up to 30/35 real quick.

 

ok thanx i wont be so excited yet then. Becuase all I did was remove the silencer ring, thought it wasnt going to do anything.

 

All that did for you is make the turbo whin a little louder. It doesn't do anything else. What you want is to have your boost raise quickly. The quicker it's up, the faster you're going. The stock turbo works pretty good don't that but, you can have it work better for you. That's getting into perfomane boxes and stuff which you may not plan to be doing?

 

oh yeah I do I am looking at banks Six gun set up right now!!!!

 

The highest I've been able to get mine up to is 26PSI.

 

What kind of vacuum do these engines pull?
I'm trying to decide on what guage to get and I want to make sure I get one that will read high enough boost and still read vacuum.

Edit: Well after asking I decided to look it up. It appears that these engines produce no vacuum. What a noobie!!!
From every.cummins.com-
"Unlike gasoline engines, diesel engines produce no vacuum when you release the throttle to help slow the vehicle. The higher compression ratio of the diesel acts like a spring on the pistons, even with no fueling."

 

I thought the stock boost pressure was post to be around 26-30 not 30-35? Is that just for my truck???

Also who did you have look at your truck 9 psi! Wow.... Are you sure it was a diesel mechanic? Possibly a mechanic at the dealer?
-Dealer Mechanic - WOW you do have a turbo!!! Durrrr.....