Engine/Transmission (1998.5 - 2002) DDII's and Boost Pressures

[dshawhan]

Here is my dilema, I just installed my DDII's and love the power but I was sure that I would get more than 32psi with them and my box. (see Signature) That is all I can get on low setting @40 hp on the box alone then the injectors on top of it I thought would produce more like 36 to 40 psi. Maybe I was thinking wrong or was expecting too much but I hope not in a way, I want more boost! With an EZ and DDII's what should boost be? I am thinking of changing to an EZ and selling or trading my JVD box.

And finally would my 235hp injectors work in my dad's 98. 5 auto? If so would there be a noticeable difference? Thanks for any help! Dshawhan

 

[Idaho Native]

Boost w/DDII's

My '99 ETC with DDII's and EZ on setting 3 gets 28 psi max on a good day... I'd like to have your extra 4lbs!

 

[Mad Bomber]

Boost

Check your intercooler clamps they should be kept at 95 inch LBS there are a total of 9 clamps.

 

[Mad Bomber]

Boost

Check your intercooler clamps they should be kept at 95 inch LBS there are a total of 9 clamps.

 

[Mad Bomber]

Boost

Check your intercooler clamps they should be kept at 95 inch LBS there are a total of 9 clamps.

 

[jwinnie]

dshawhan,



32 psi sounds pretty good. I've never seen more than 34-35 psi with the Pmax3 set on kill. Unless mine is low

 

[Ramafid]

I can't help you out on the DD2s issue but I can tell you that with Bosch 275's I see 30 lbs on the 1st level and 34 lbs on level 3. I have the blue box which has 4 levels. I gained a solid 2lbs of boost when switching to a Jardine 4" exhaust. Hope this helps.



Anthony

 

[dshawhan]

OK maybe I was expecting too much. Thank you guys for all the help I am going to check my intercooler pipe connections and am thinking of stacking on an EZ to see what happens. Jwinnie I am going with you on this and am hoping that both of our boost levels are right and we have no problems with our trucks. Thanks again Dshawhan

 

[dshawhan]

OK maybe I was expecting too much. Thank you guys for all the help I am going to check my intercooler pipe connections and am thinking of stacking on an EZ to see what happens. Jwinnie I am going with you on this and am hoping that both of our boost levels are right and we have no problems with our trucks. Thanks again Dshawhan

 

[GTop]

On my '01 ETH i'm seeing 34 pounds of boost with DDII's and a TTPM(Diesel Dynamics version of the EZ)

 

[JMarkos]

I see anywhere from 34-38 psi depending on load and rpm.

 

[csevers]

Do you have any kind of restriction in the waste gate line? I have a tst elbow in the waste gate line and could break 33 with ez and 275's now I can almost 38 psi _alls to the walls with comp and dd2's, I don't do it often so maybe I could get more who knows.



Craig

 

[IdaH.O.Train]

I've always wondered the same thing. With my setup (see sig) I thought I would be in the 30's; however, the most I see is 28psi and I've checked the clamps. I guess it just goes to show you that each motor is different.



My clutch, on the other hand, has held fine. No slippage. You can't have it all.

 

[01smokinram]

Boost

Check the boost elbow that was sent with the box. I had the same problem and wildcatdiesel told me to disable it and i could get 40 psi of boost on level three. The elbow that they sent you is letting it open around 30 psi. With my new setup i can get 45 psi with no problems.

 

[TPlasek]

DD2's and EZ on the middle jumper (with the EZ boost elbow) = 34 psi at 2700 for me...

 

[Snow man]

Dshawhan, you dont want much more than 32PIS with a stock turbo,it goes off its map at about 34-35 PSI,gettign more boost out if only increases drive pressures ,makes a lot of hot air,which raises EGTS,and reduces power and shortens the life of the turbo. If you really want more boost. ,give it more fuel and a bigger turbo. I only got 37 PSI on my stock turbo at 425hp with a 14cm housing,with a drag comp on 5x5,and DD3's. With a B1 turbo,and the comp off, dd3's I can get 39PSI, with comp on 5x5 i get 50 psi with dd3's,and 54psi with BD7's.