03 Bombed 5.9 - Cam problem? Missing power!

[hpranch]

Just put together a bombed 2003 and power is around 200 hp and 500 lb/ft of torque lower than expected. One of the upgrades is the PDR cam - I am wondering if I could have it installed a tooth advanced causing the exhaust valve to open early bleeding off cylinder pressure and causing high EGT's.



Specs: 03 5. 9 with ATS twin turbos, PDR cam, ARP studs, HD Springs, ATS intake, Snow Water/Meth, Powermax CR R49, 5" exhaust.



Makes 67 lbs of boost (datalogged on the dyno). EGT's hit 1450 pretty fast (limit on Powermax CR). With water meth I can keep the EGTS just below 1450 so the CR doesn't pull fuel. Peak HP is under 400 and peak torque is around 850. This combo should be around 550-600 hp and 1400 lb/ft of torque.



I am ruling out fuel (CP3) as boost stays at 67lbs for the entire pull and EGT's stay high.



67 lbs of boost is plenty to make the power I am looking for.



The water/meth kit has 30% meth installed (it really helps the EGT's)



EGT's hit 1400 very quickly - way faster than I would expect.



The intercooler is new but is a stock intercooler.



My thought: If I installed the cam a tooth off so the exhaust valve is opening early that would have still-burning fuel flowing into the exhaust manifold early which would reduce cylinder pressure and cause higher EGT's.



The only other thought I have is on the dyno when I connect to OBDII my dyno shows the engine coolant temperature at 412 degrees (impossible). I think my dyno is just reading it wrong but if the temp sender was bad and the ECU thought the engine was hot would it pull crazy timing? I know it isn't pulling fuel as I keep boost high and EGT's high.



I run a dyno shop in the Seattle area but this diesel stuff is not what I normally do. This is my personal truck, not a customer truck. I have been a member of TDR off and on for a few years but this is one of my first posts.



Thanks for any advice.

 

[Tomeygun]

you need to for sure monitor the rail pressure. The high boost and high egt is a good sign that your CP3 is not keeping up with the TST demands



As well if you only have the TST for fueling, that is not enough I think to hit 600+ hp...



Is this an HO or SO?

 

[TCDiesel]

That would be an incredible amount to be off, I don't think it would even run( Not good @ anyrate). Tomey Gun You haven't made 600 yet, whats tak'en ya. Hp Ranch contact us I have a few questions to ask. .

 

[TCluff]

you need to for sure monitor the rail pressure. The high boost and high egt is a good sign that your CP3 is not keeping up with the TST demands



As well if you only have the TST for fueling, that is not enough I think to hit 600+ hp...



Is this an HO or SO?

i second that

 

[hpranch]

you need to for sure monitor the rail pressure. The high boost and high egt is a good sign that your CP3 is not keeping up with the TST demands



As well if you only have the TST for fueling, that is not enough I think to hit 600+ hp...



Is this an HO or SO?

If the CP3 pump was not keeping up I would be losing fuel and that would lower EGT's and lower drive pressure on the turbos creating less boost - am I wrong?



I have watched CP3 pressure on the Powermax CR R49 but the problem is with digital readout it goes by so fast you can't really tell (datalog) but it appears to be around 25,000 during the pull.

 

[Tinman]

I think your wrong about low rail pressure. If you loss rail pressure, there is poor fuel delivery and poor atomization. This leads to ineffeicent combustion, high egts, power loss. I think this is a definite possibility. I believe the stock cp3 is good to about 550hp with stock injectors so it might not be the problem but I'd start there.

 

[TCluff]

I think your wrong about low rail pressure. If you loss rail pressure, there is poor fuel delivery and poor atomization. This leads to ineffeicent combustion, high egts, power loss. I think this is a definite possibility. I believe the stock cp3 is good to about 550hp with stock injectors so it might not be the problem but I'd start there.

Exactly, the high egts and boost are due to the late injection timing caused by the low fuel pressure/atomization, the combustion is partially taking place in the exhaust manifold causing turbo drive pressure to be high, creating high boost pressure, with low rail pressure the injector says fire but the low fuel pressure cant push it out on "time" so burning fuel gets pushed into the exhaust causing high egt and turbo drive pressure... . hope this helps

 

[Tomeygun]

That would be an incredible amount to be off, I don't think it would even run( Not good @ anyrate). Tomey Gun You haven't made 600 yet, whats tak'en ya. Hp Ranch contact us I have a few questions to ask. .

haha silly twest - I cracked 604hp way back when I got my flux 2's (I think around mid 2006)



Since then I have really layed off the mods - kind of waiting for the next big thing, ya know?

 

[hpranch]

Today I am going to datalog rail pressure (found out from TST how to do that). It looks like I need to move to dual CP3's - anyone have a favorite setup?

 

[TCDiesel]

CR injection system On 3gens does not conform to normal logic, its by exprience that you are able to understand it. If you do not have the fuel to support its boost the truck just flat lines. T-Gun I thought you broke that 600hp, I was just checkin.

 

[hpranch]

Well I datalogged rail pressure and found that I can only run the TST on power 2 and torque 2 - with that setting I made 500+ RWHP and 1,200 RWTQ. Max EGT's were ~1,100.



I have a dual CP3 setup on the way looks like I need more fuel!

 

[moonranch]

hpranch,
What did you do to datalog the rail pressure? I would like to try it.