Sounds like a plan! Yes, the truck will need to be modified. When using larger injectors, the ECM needs to be tricked into not knowing there is over 20 psi of boost.....this is referred to as a boost fooler. Most fueling modules like a Comp or EZ, have an integeral boost fooler. If you don't want to use a fueling module (I suggest that you do), a separate device that plugs inline in the MAP harness called an ADD (Anti Defueling Device) can be used instead. An EZ and 275's are a great combo for making power and picking up some mileage.

 

My future plan, which seems to be sooner than expected, was to add a Van Aaken with the 275's. I am swayed by the Van Aaken because of the reports that it has a little more low-end grunt, to go with my 410's. Do you honestly think this will eleviate my problem? Won't I have to invest in an intake and exhaust too? The way this is sounding, my wife's going to be in custody for homicide soon!

 

Well that is a good pt. wast gate...as I got rid of mine I forgot evryone else might have one
and yes if you replace inj. go at least 275 s they will put a smile on your face and get rid of the waste gate put a real rear houseing on that turbo!

 

What do you mean, " get rid of the waste gate." Can you do that?

Is there no way to fix this thing other than throwing a $1000 in upgrades at her?

 

Yes there are all kinds of parts for your turbo...But you have to know what you are Realy going to be doing with your trk as far as these mods....I use mine in real tow aplication so I am on the mild side.
I belive I went dwn one size on the rear houseing and a diff. adapter from there to the ex.-with no waste gate.
I do not have a boost fooler orbox on the trk but will pull past 20 lbs boost ez. with 275s I am quick to back off at that pt as I do not want to bewilder the ecm
Lots of dudes get into the race bug here and its not for every one. Be quick to relize one thing leads to an other more fuel=more boost, more head bolts (studs ect).....

 

I'm looking for a little more to haul my 12k load. I'd like to be able to have confidence if I ever tow that thing over the Grapevine. The way she's towing now, I'd be lucky if I'd maintain 40 mph up that thing ... that's not right!

So, to make this thing haul the way it's supposed to (and maybe a little better) what do I do?

 

Everyone is going to have a little diff ans.
1 st and formost guages with 275 s
2 then how much do you have to spend??
3 on the simple side a fuel box and loose exhuast with kind of turbo you need or diff hot end on the stocker like said

 

I've got the gauges, so I think I'm going to have to look around for injectors, box and exhaust. Looks like I'm in for a divorce. I have to do something, 'cause I bought this truck for the towing capacity and torque ... I don't like being let down. I need to renew my faith in this thing.

 

I have a edge EZ and was wondering if I still need a boost fowler? I have been throwing the 1693 companion code lately. I was thinking that it must be from over boost, is this probably the cause?

 

The EZ has an integeral boost fooler......all boxes with a MAP connection do.....the 0234 over boost DTC will not trigger the 1693 and it is readily retrievable from the odometer display.

 

I don't have a boost elbow, would that make any difference on the boost?

 

It will make a difference.....don't believe the instructions for the EZ. Install the supplied boost elbow. While you won't gain much power other than a little bit of peak boost power, you will get a slight mileage gain when towing at high boost, a noticable egt reduction, and less smoke @ WOT.

 

I agree, boost elbow is a must, ESPECIALLY if going with larger than stock injectors, even mild 275s.

Piperca-- I'm going to vote for the tranny being thr problem. There just no way that your truck should only see 18psi or so with 12K#!! With that kind of weight, there's enough load on the engine to make boost race up to the Wastegate setting.

I think you can rule out wg malfunction because of the low EGT you are seeing.

The only way you can have low power at the boost and EGT numbers you report is if 1) you aren't getting full fuel into the engine or
2) The engine isn't seeing enough load to let the computer deliver full fuel.

You mentioned a new fuel filter and the VP seems good (runs fine). You have good FP, too.

What you really need, imo, to solve this dilemma is a tranny temp guage. I suspect you will see the soaring tranny temps when towing that are evidence of lost HP.

If the trans proves itself that it is transferring power (stock auto trannies aren't known for good performance after 100K miles, even with no power upgades), THEN you should be looking at a fueling problem.

jh

 

Thanks, Hohn, I'll look into that first.

 

I did a little work on her today. I cleaned the battery terminals, APPS reset (just in case it works) and replaced the air filter. I was having problems with loosing lockup; so far, that problem seems to have gone. I took her to a nice steep incline and punched it from a dead stop. Just for a split second, she bounced of 20 psi, settled at 19 psi for a couple of seconds, then dropped to 18 psi for the rest of the trip. All I can say is I saw an improvement.

I'll be investing in a tranny temp gauge, but I'm still going to go the injector/box route. Will I have to do the exhaust at the same time or can I do that later? Trying to budget myself, as I've just dumped a few grand into my boat ... wasn't anticipating this happening!