stock 05 how should it boost

[BKB]

I have been searching and haven't seen anyone explain what kind of boost you should see on this motor under different driving conditions, i just see WOT 20-30psi. I have a 2000 Golf TDI with a VNT turbo and it works the way a VNT turbo should it will spool up to about 18psi at 1600 RPM and keep that boost till red line. Now My stock 05 6.0 turbo acts like a non VNT wastgated turbo. I will read about 5psi around town and on the highway unloaded, at WOT it will slowly build boost as the gears load the motor to about 20psi. With a 10k pound trailer i only see about 10psi cruising at 60mph in 4th and have to beat the hell out of it to get boost up around 22psi. Still trying to figure out if the vanes are stuck or if this is normal. Truck never smokes and EGR is clean.

[simonl]

sounds normal to me. Cruising around 5-10, depending on load. Supposed to max out around 26. Thats how mine is...bone stock.

[CAMPINGTOM]

Mine too

[BKB]

So it the factory fuel tables that basically dont allow the turbo to work as it should? The turbo on my VW is always within 5psi of max boost over 1500rpm. Like i said i see no advantage of the VNT turbo on this truck, seems the turbo on my 97 7.3 did a better job of building boost. I hear people talk about turbo lag then a rush of power, my trucks power seems very linier no rush of power anywhere. I took it into ford with complaints of low power and they reflashed it. Seems i have lower boost but no change in power.

[BigBertha]

Your truck sounds normal to me. I also have an 05. Even with my SCT on extreme street mod. I have never seen boost over 22 psi. Normal highway cruising I see 5 to 10 psi. Seems normal. Unless I am having leaks around those rubber boots that I am not aware of. I do remember that my old 02 had considerably more get up and go, but sadly I sold that ole reliable 7.3 truck.

[Strokin' 6.0]

BKB, your VW and Ford are two entirely different critters; it's like comparing an elephant to a rabbit (forgive the VW pun).

I'm no fan of the Garrett VGT. I don't like the fact that it doesn't spool up fast, like the Holset HX/HY-35 wastegated turbo on the 2nd Gen Cummins does.

I think, and maybe the techs can chime in on this, that the Garrrett VGT is designed to produce maximum efficiency and power, without wasting fuel. The penaltly, it would seem, is turbo lag.

I wish I knew what my boost was, when I'm towing, but gauges are the next item on my agenda and, until Household 6 tells me that it's okay to get them, I'm gaugeless.

I do know, that my truck FEELS like it has plenty of boost, while driving under acceleration, but off the line it's a dog.

[BKB]

Originally Posted by BigBertha

I do remember that my old 02 had considerably more get up and go, but sadly I sold that ole reliable 7.3 truck.

That is probably most of my problem, im trying to compare this truck to my 97 F250 and it dosent come close. My 97 would eat this thing up especially with the 5th wheel hoked up. But i have test driven a few 03-04 6.0s stock and they all pulled allot harder then mine. Mine just drops off around 2500rpm. Im going to take it back to ford and see if they can run some tests. The only things im really concerned about is the fuel pump and injectors. I would be happy if they just do a cylinder contribution test and check fuel pressure. My warranty is just about up so then i can tear into it and see what i find.

[Strokin' 6.0]

You know, another thing I just thought of, do you think that your 3.73's might have something to do with the lack of pulling power? Just a shot in the dark.

[BKB]

Originally Posted by Strokin' 6.0

BKB, your VW and Ford are two entirely different critters; it's like comparing an elephant to a rabbit (forgive the VW pun).

Yes I know they are totally different, just seems there is no advantage to the turbo on the 6.0. Driving the truck one would never know its a VNT turbo, it dosent act like on at all. The VW you can tell its a VNT very little turbo lag and constant boost all the time.

[BKB]

Originally Posted by Strokin' 6.0

You know, another thing I just thought of, do you think that your 3.73's might have something to do with the lack of pulling power? Just a shot in the dark.

Not really because in Tow/Haul im at 2-3k on the highway well within the torq of the motor. Towing the motor dosent seem to have a powerband anywhere. With the 7.3 when it was at 2100rpm you could tell she was lit and it would pull up any mountain as long as you kept it above 1900rpm. The 6.0 does not have that feeling of being lit, feels more like a 351 gas motor.

[Strokin' 6.0]

Yeah, that's the way mine is, but when I hit an incline that VGT kicks on and it goes.

Do you drive your truck enough? By that, I mean that maybe your vanes are stuck. I hear from a lot of folks that you need to drive these trucks on a regular basis, otherwise condensation builds up in the turbo and the vanes rust and eventually seize.

[BKB]

That is what im trying to find out. First dealer was not willing to help out at all. They said i would have to pay for all diagnostic work to figure out why it is lacking power, they re-flashed the computer for free and sent me on my way. I just purchased the truck a few weeks ago and the owner did not use it as a truck, just slow weekend tips with the family. As soon as i bought it i replaced fuel filters (they looked brand new) and i pulled the EGR and it was very clean. Oasis is clean on this truck showing no work since 04. Seems all the dealers around here are more worried about tuners then customer satisfaction, thanks to all you retards that blow up you 6.0 on extreme tunes and get it covered under warranty. The 2 dealers i took the truck to thats all they ask me do i have a tuner, and if i do they can tell and they will void my warranty. Nothing like getting interrogated at the dealership.

[Strokin' 6.0]

I hear ya. Based on what you told me about the previous owner, I would tell you to have the dealer look at the turbo innards; I'd be willing to bet that your turbo needs a good cleaning.

[BKB]

Originally Posted by Strokin' 6.0

I hear ya. Based on what you told me about the previous owner, I would tell you to have the dealer look at the turbo innards; I'd be willing to bet that your turbo needs a good cleaning.

I might just do it myself, the way i have been delt with at the dealerships its not worth the hassle. I have to pull the turbo off of the VW about every 20k miles for stuck vans so its nothing new for me. Just seems the turbo is working as it should on the 6.0, it doesn't overboost and it does seem to act as a exhaust brake then tow/haul is on.

[BKB]

truck goes in monday.