PDR Cam and HE351

[CKelley1]

it is speculation we were thinking more the tpi input into the ecm. we just know what works

 

[cerberusiam]

it is speculation we were thinking more the tpi input into the ecm. we just know what works

Yup, until somebody breaks the actual code in the Dodge ECU so we know EXACTLY what and how it is using the paramters, its what could be deemed as speculation.



However, since we can manipulate some things and get the desired results it no longer speculation but theory based on observed phenomena, IMO. There are LOT of things that are taken as truth with less details and supporting observations than this.

 

[Matt400]

So, the pdr cam comes in two flavors - the reground version and the one from the new blank.

Question is. . which is better. I bought new and according to PDR they use a new blank that enables them to get different and more desired specs that are not attainable with a regrind.

 

[AH64ID]

bump... ...

 

[Kubotaorange76]

so how long before you do the swap?

 

[AH64ID]

Hoping to do it sometime this winter... Have a couple of long trips, so somewhere in between is the goal.

 

[blacksheepdiesel]

CKelley1, what rear end ratio is in your trucks? And what OD ratio is in your G56?

Godspeed,
Trent

 

[CKelley1]

the 06's only came in one flavor a 3,73 with the G56AD that has 0. 79 6th gear

 

[p-Bar]

This is a very interesting thread thanks CKELLEY1 for all your input and responses

 

[blacksheepdiesel]

Thanks dude. I was considering changing my 4. 10 to 3. 73 to try to help mpg's but thanks to you I will now go the cam and nozzle route. Driving 120,000 miles a year the payoff sounds fast and furious!

Godspeed,
Trent

 

[rscurtis]

CKelley1, how did the High Tech Turbo perform?

 

[Cumminsduallyguy04]

I never bought a cam from pdr i read good things years ago in DP mag, but i bought their stage 4 cobra twins. needless to say i was very unhappy with the product at several times and the customer service from the guy was unbelieveable. Dont buy if your gonna need any customer service related assistance. I ended the conversation wanting to purchase an airline ticket... . just be fore warned

 

[Walcott]

Excellent information!!My 03 gets 14-15 mpg,with diesel prices goin up again 22-23 sounds to good to be true. You can't beat tried and proven facts,Ckelly thanks for the info!!

 

[CKelley1]

the htt turbo did what it was mapped out to do. it is well designed and had only one problem, the exhaust opening had to be enlarged some to get the bd butterfly to close, i was able to do it with out taking it off with a die grinder . i am on my way back to new mexico from florida with it now. i did not get the gain in mpg that i thought i would get then i started thinking . at normal driving the only thing i gained was lowering my pumping hp requirements by the 6psi i achieved . when you calculate it this way, the less than 0. 1 mpg increase is exactly what i got.

 

[AH64ID]

the htt turbo did what it was mapped out to do. it is well designed and had only one problem, the exhaust opening had to be enlarged some to get the bd butterfly to close, i was able to do it with out taking it off with a die grinder . i am on my way back to new mexico from florida with it now. i did not get the gain in mpg that i thought i would get then i started thinking . at normal driving the only thing i gained was lowering my pumping hp requirements by the 6psi i achieved . when you calculate it this way, the less than 0. 1 mpg increase is exactly what i got.

Did it do anything for spoolup? What about drive pressure and EGT's?

 

[CKelley1]

with the 5th wheel hooked to it and me driving it like my semi, i can not tell about spool up. i made several changes all at once and is hard to figure what ones did what. the ss turbo and ss manifold with heat blankets on both does as expected and keeps the exhaust expanded and should reduce turbo spool time. it did make the 13cm spool and pressure the same as 12cm on the maps. a bd intercooler was also installed at the same time and that adds confusion to the calculations. the temp readings on the bd at tow load did not improve enough to warrant the install. using the formulas it appears the turbo lowered the egt by about 75* the turbo does appear to be perfectly matched to my truck. it has adequate air at low rpm and load and never opens the waste gate unless you are trying to get up to speed quickley for a on ramp to the interstate.

 

[AH64ID]

I wanted to update this post.

I went with a Colt Cam Stage 1, which is the same grind as the PDR with a different label,

I am very happy with the results, nothing major but I think its how the cam should have been ground from the factory. The truck is a little more efficient, runs a little cooler, has a slightly stronger bottom end, and a bit quicker spool to 20, 20-30 is about the same, and a bit slower above 30, but there is more air being moved per psi, so honestly an increase in spool rate means I am moving a LOT more air than stock.

Drive pressure and boost retained about the same ratio, so at least it didn't increase DP.

It does take more rpms to get the same backpressure on the exhaust brake, but doesn't seem to effect the retarding hp.

 

[blacksheepdiesel]

How much cooler does it run? I'm hopefully going to get the PDR cam installed I bought almost a year ago...

Main thing I'm looking for is cooler egt's (even a little will help) and hopefully get rid of some of the soot level.

How many hours did it take?

Godspeed,
Trent

 

[AH64ID]

I would say that it runs about 75* cooler under heavy towing, and about 25-* cooler under normal cruise. I run the same EGT's with the cam on SW2 of the JR as I did with the stock cam on SW1, maybe 25* cooler still.

Honestly I am impressed it cools the EGT's any at all since your taking more hot air out of the cylinder, but I guess you let enough cool air in and it all run cooler.

I think I was billed about 9-10 hours for the install. I didn't have the proper tools to do the work myself.

I will let you know after my 1st UOA, but I really hope the soot is down.

 

[TStrite]

AH64ID do you still have stock turbo? I am looking at colt cams also but not sure how cam-stock turbo setup would be.