Well I just purchased the new Edge evolution with Jodys tunes from DP-Tuner along with a valve body from John Wood. I am very happy with everything with one exception. I am only seeing 19psi on the 80E tune and 20psi on the 120R settings. (I also got the overboost annihilator- OBA). At first I figured since the edge is showing only what the computer is seeing that the OBA is doing its job. So I put one turn in on the OBA just to see(I know they say not to mess with the ****).Same boost numbers...Just for the heck of it I disconnected the red wastegate line and saw 22 psi in the 80e tune. So what do I do now? Most of you all say you can get 25+ in 80e. My EGT's seem to hit 1200 fairly easy as well in the 80e. I have checked/tightened all boots. I have a clean 6637,5" straight MKE exhaust,hpx line mod. I will call jody later to see if he has reccomendations. The power is great and it shifts wonderful. I just want as much boost as I should be getting and make sure my EGT's stay safe.

 

I have the similar setup, but with Jody's flip chip, 80e,120r tunes with the OBA, and my truck hits 25-27lbs in the 80e setting. My truck has the stock turbo, 4" down pipe, 5" from muffler back, and 6637 filter. Sounds like you might have a boost leak.

Stephen

 

I saw similar things when I disconnected the wastegate. My numbers are up a bit from yours, though. I have similar mods, except a 4" exhaust and no HPX (yet). I've defintely seen higher boost numbers in 120 Race, but I haven't looked directly at the boost gauge when hammering it. I'll try to pay closer attention to it, but I just got my DP & gauges installed, so I haven't been able to "play" with it too much. I've seen between 25 & 30 lbs. max on the boost and right around 1100 max on the Pyro when nailing it. You said all your boots are tight, but what about your up-pipes? A leak there will cause a loss of boost...

On the Evolution, I just had a look at the new one with the GPS & backup cam -- VERY COOL!!! Since Jody's tunes can go in these, I may have to indulge myself the next time I have $1500 burning a hole in my pocket. Check it out:

http://www.thoroughbreddiesel.com/edge/A2.htm

Joe

 

The only boost gauge I have is in my evolution which reads through the computer (via map sensor) so I'm wondering how true it is?

 

Oh, well the regulator hides the real boost numbers from the computer so it doesn't start de-fueling. That's why you're maxing out at whatever the regulator is set to.

 

Thats what I thought at first too but I turned the **** on the regulator in one turn to allow more boost pressure to see. Maybe bypass the oba and see what it reads. If I had a boost leak I wouldnt think I would see more boost with the wastegate disconnected

 

Yep, if the evolution is reading the boost from the same source as the MAP or PCM, it will be lower behind the OBA. Bypass (remove) it and see if you can set an OB indicator. Of course it will defuel at 25psi or so. Here is another reason the old school mechanical gauge can be better.

 

I nailed it today at the only place I could (you know, without having to worry about Panama City's finest!!) running 80 Econo. I saw 28 psi boost and a little over 1000* EGT when I got off it at 85 mph. D@mn CEL came on, too (I assume because of the HPOP)...

Joe

 

Wow, thats nice. Stupid question for ya..... is your egt pre or post turbo? If its pre then Thats real good cause I would see 1200 by the top of second gear!

 

I'm thinking the steps in the regulator must be fairly small if you changed it one click and didn't see any change in the max boost. If you turn it up too much, it'll throw a code, then when it gets to 25 or so, it will defuel.

Pre-turbo. I haven't been able to get it to 1200 yet. But I don't have a lot of places I can really get on it. Closest interstate is almost an hour away and I haven't been on it with the gauges yet.

Joe

 

I turned it one full revolution not just one click!!!!! I'll just by pass it tonight and see what happens, I'm tired of guessing lol. I do notice lower egt's with the wastegate line off though.

 

Ok -- sorry for misreading that!! I was thinking one click for some reason. It will be interesting to see if you get the CEL at 22 psi & defueling after 25 (or whatever the PCM looks for)...

 

id check the turbo wheel for in and out play..then up, down side to side play..that would cause low boost and high EGT's the wheel should be clean and sharp as well..good luck

edit: is she blowing more black smoke then the norm?.

 

Well I disconnected the OBA and put the straight vacuum hose back on the map sensor to see true boost. On 80e it saw 20 psi max. When I disconnected the wastegate line it saw 22psi. It doesnt jump right there either when I get on it it will jump to about 16-17 then.....18......then.....19.....then 20 and about that time it hits 1200 egt and I get out of it. It does put out some good black smoke when I first stab it. I'm not sure what the normal smoke is for DP's 80e tune though. I hope my turbo isnt goin south.....

 

hmmm... When I get on mine in 80 Econo, I get a pretty fair amount of smoke (nothing like the 120 Race setting, but a lot more than stock), so this seems about normal from your description. The boost seems low and your EGTs seem high. Have you checked for soot on the up-pipes?? And are you *sure* the boots aren't leaking?