Boost and low-end power

[RGramlow]

I am wondering how much boost you guys are seeing from these engines in stock form. This would be a 93, I can't hardly get it up to 15 PSI, and I have never seen the pyro over 1050 pre-turbo. Doing some research it looks like I can turn the starwheel counter clockwise to get more low end power, but how much should a guy turn it. This engine isn't in a pickup any more it is in a service truck that I built this winter. It's weight is about 14,000 lbs the wai it sits in the picture, so it puts a fair load on the engine. It is also geared pretty low, in the range of 55 MPH at around 2000 RPM. Would it be ok to turn the star wheel a little bit, or should I look for a different exhaust housing for the turbo first? I thought maybe the pump had been tweeked, but if it is it isn't much. By the markes used to line up the injection pump it has been advanced about an 1/8 inch or a hair more. Thanks in advanced

 

[dpuckett]

First, find TDC and verify the timing. If it's too far advanced, it will be sluggish and boost will be low. What kind of EGTs ARE you seeing? 1500 is pretty danged hot, and you normally dont see it til you get the fuel flowing pretty well. My mom's pump is flowing 30% over stock, and she still cant hit 1000deg (Of course, her slush-o-matic-stock-would-be-an-upgrade transmission could have some bearing on that as well), but can top 24psi boost.



You can turn the starwheel as far as you want, since you have gauges. It only affects the RATE of fuelling increase, not total fuelling. I wouldnt go any smaller than a 16cm housing on the turbo- any smaller and you could restrict yourself, esp with the low gears and higher load and RPM it'll run.



And, with your low boost and temps, it probably wont kill anything to increase your fuelling (via full fuel screw) a turn or so.



Daniel

 

[PToombs]

Daniel, 1050*, not 1500*. I have an f800 at work, 5. 9 with a p-pump, 19k lbs, just sitting there! I screwed the starwheel down and it seemed to accelerate better. Of course, later I slid the plate ahead, but that's another story!

What I'm saying is, turn the wheel down, (clockwise) it will help. Then you can turn in the fuel screw some for more!

 

[Greenleaf]

Daniel, 1050*, not 1500*.

There is always one in every crowd isn't there... ... ... ... ..... :-laf

 

[dpuckett]

I could have sworn I saw 1500 (not to say it was 1050, but *I* think he snuck in there and edited it, and the forum just didnt advertise it to the world).



DP

 

[PToombs]

Yeah! Yeah! that's what happened! It's the computers fault!

 

[RGramlow]

I kind of put this project on the back burner for quite a while, but got to tinkering more, and here is what I have now. I had the injectors out and taken them to the pump shop and had them all gone through. I have the full load screw turned in all the way it seems. Its been a while but I think I turned the star wheel but got a lot of smoke so I put it bad at least some if not all the way, it still smokes alot, (more than I really need but... black stuff sprays all over after a rain hehe) until there is boost. I checked the timing and it looks like there is 1. 47 mm lift. I can get the EGT up with out too much problem specially when pulling a load, or driving with out a trailer on soft gravel roads in the spring time around here. About all I am seeing is 22-24 psi of boost. The truck weighs 15-16000 empty now with other things I have added since the photo, and I could really use some more power when hauling my Telehandler, that will put the gross weight in the area of 45-50,000 pounds. Are you still thinking that 16cm turbo, or is there something better a guy should look at?

 

[cerberusiam]

HE351CW or HE351VE would be a good addition. If you need more power then it will take more fuel. Injector tips and tweak the pump to flow more. Should be pretty easy to get all the power you need.

 

[RGramlow]

Ok I found a turbo off of an 06, what would something like that be worth? A friend took his off for a bigger one, I think I can talk him into selling it.

 

[cerberusiam]

Ok I found a turbo off of an 06, what would something like that be worth? A friend took his off for a bigger one, I think I can talk him into selling it.

Yep, that is an HE351CW and will work great. Less work to drop in also. You will need to re-clock the compressor housing to line up the output, you really need the exhaust elbow to make the down pipe or you will scrambling to find a connector. If you can get all of it for around $300-350 it would be a good buy.

 

[RGramlow]

I am finally getting around to getting this turbo swap done, a couple quick questions I can't find now, I read before on the forum someplace I believe just need to supply 12 volts to the wastegate valve. Also are you just making a bracket to move the wastegate actuator over after clocking the housing a bit to get it lined back up with the arm on the exhaust housing? Will I need an adjustable orfice to keep boost levels down to 40ish psi. And should a guy retorque head bolts with this upgrade? Thanks agian.

 

[cerberusiam]

The WG controller is 5 volt PWM, you don't wasnt to send 12 to it. If you leave it disconnected you will have about 26 psi of boost to open the WG. Add a boost elbow to the boost reference line and use thta to adjust WG opening. As long as you keep it at 40 psi or under your HG should be good.

 

[RGramlow]

Ok thanks, I figured it was pwm didn't know the volts for sure I must have been dreaming when I thought I read to just connect to 12 volts. I will install an elbow to adjust it.

 

[champspa]

did you say what the cpl for the pump is , it could be like mine and not a dodge pump .

 

[RGramlow]

Are you asking me about the CPL on my pump?

 

[Greenleaf]

The Control Parts List number is on the engine ID tag right there on top the timing case.

 

[RGramlow]

I took the truck for a quick test drive and all I am seeing is 15 PSI boost, I haven't gotten a boost contol valve in the wastegate line yet. I tried to pinch it off with a visegrips quick on my drive home (only a mile out as I don't have much time at the moment to mess with it) Possible not enough fuel to build the boost, or is this housing supposed to be smaller? The visegrip I had didn't really do the best job probably of pinching off that line so I will maybe have to get a better pinch off tool and go for a drive again later. Just thought I would throw this out there see if anyone wanted to toss it around a bit for any good ideas I am not thinking of. Don't believe I have the star wheel turned down a whole lot, and I thoguht the fuel screw was turned in pretty tight, but I should double check it. I had the head off to replace the head gasket a couple years ago and checked the pump timing and I came up with 1. 47mm lift, had the injectors gone through at a pump shop, but as far as I know they are the factory ones. Thanks again.

 

[RGramlow]

Oh and the CPL is 1579

 

[cerberusiam]

The housing is a lot smaller and should boost quickly and into the low to mid 30's with the line pinched on somewhat normal fueling. Our 3 trucks will drive the HE351 and HE351VE over 40 psi with no problems, even the 16 cm one will hit 35 without a problem, but, we have heavily tweaked pumps and big injectors.



Definitely sounds like its not getting the fuel into the cylinders. Check the star wheel setting, diaphram for a possible hole, the boost reference line for a crack, and all the fittings tight.



Unless you got the pump from the Midwest Diesel Performance place that Dvolk did, then its probably the pump.

 

[RGramlow]

Hmm, I will look into some air leaks. The truck ran good and had good power before, it would just run pretty high exhaust temps which is mostly the reason I was looking for a turbo swap, never hurts to pick up some more power at the same time thought it for sure has less power now than before teh turbo swap. I double check for air leaks I didn't mess with anything on the left side of the engine, but I suppose could be a strange deal where one could have developed at about the same time. Thanks I will report back