Any updates on the aftermarket Camshafts

[Roger rodbolt]

Re: DD Vs PDR ???

Originally posted by overfueled

From what I have read the PDR would have have it. Is 10% really worth the $1000. 00 extra? Man with that money you could you could buy__________/? More than what you would lose in the 10%. OverFuled

I have a question, not necessarily for Overfueled but for anyone. How do you measure the effectiveness of a camshaft or compare one to another in percentages. Even though I am pleased with my camshaft results I can't say it is xx% better in spoolup, egt, etc. Not questioning anyone in particular but to help me in testing I would sincerely like to know what methods and parameter's folks are using to compare the DD to the PDR and stock? Larry

 

[CRoth - BD-Power]

Originally posted by Evil Otto

i lost10 lbs of boost. don't know why. and no gain on mpg.

Could it be due to more valve overlap?



If your planning to run big power on a single charger they are a must.



Both cams are better than stock, decision made, get one.

 

[SlyBones]

Originally posted by 78repowerwagon

So both cams are reground cummins sticks, one for a boat one for a pickup. Is the marine cam stronger or hold the gear on in a better way?

My impression is yes the marine one is stronger. But how many times have you seen a post on the TDR about a guy who broke is cam? I think it becomes important at 4000+ RPMs. Outside the range of these cams I believe are intended for. Would not be suprised to see it on those 5000 RPM monsters the top sled pullers use.

 

[Sled Puller]

Some of the pullers used a reground marine cam years ago, but moved away from it.

 

[78repowerwagon]

What does Enterprise offer?

 

[SlyBones]

SledPuller,



Are the cams the pullers are using for the real high RPM cams, have press on gears like the stock cams do? While not the marine cams, do they use anything special to keep from having problems?

 

[Sled Puller]

Enterprise has many different grinds, 12 and 24 valve.



You will have to ask them about the gears, I'm sure it differs with application.

Considering Dave has never lost an engine, whatever he does, must be working.



They keep a nice list on their site of other broken parts, though.



There are other pullers/racers in Ohio, Indiana, and Kentucky that have their own grinds.



The TDR is just the tip of the High Performance iceburg.

 

[Todd T]

I was hoping Eric would elaberate i bit more than he did. i have followed his progess since he went to the DD cam. his ET's are not any faster, actually he lost a few tenths at first. Eric can you fill us in on what you have seen from the DD cam you have? what did it do to your EGT's after a 1/4 mile trip are they alot lower? that sort of thing. you have dynoed since this too what are you seeing. where is you peak HP and Torque now? i am after low RPM preformance. i have stayed away from the pulling cams due to the high RPM's they like to run. its just not real life out on the streets.



Eric? please help us here? Larry you too, what are you seeing on the streets with your truck?



thanks

Todd

 

[Evan A. Beck]

Had a '91 in the shop a year or so ago that had a broken cam, about 6-8" from the gear. Needless to say, it ruined the engine.



Another note about the DD/marine cam... The gear is pressed AND bolted on, whereas the gear on the stock cam is just pressed on. Also, the marine cam is shot-peened.

 

[Devildog]

How many RPM can you get out of an aftermarket Cam with out floating the valves? Also is there a governer adjustment that one can make to increase the RPM?

 

[Sled Puller]

Originally posted by Todd T

i have stayed away from the pulling cams due to the high RPM's they like to run. its just not real life out on the streets.



thanks

Todd

Tell that to my ever growing list of victims... ... ... ... .

 

[Roger rodbolt]

Originally posted by Todd T



Eric? please help us here? Larry you too, what are you seeing on the streets with your truck?



thanks

Todd

Todd,

Below is my review stating several benefits with no negatives:



https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=65801



Installed Piers 24V performance cam and tappets in my '98, the day before towing my Jayco to Scheids, last September. Arriving at Scheids, I unhooked and did the sled pulls. Since that time I've been testing the cam with different injectors both in competition, daily driving and towing. The B1 turbo, Blue Chip Premium FMS and timing box have not been changed during the testing.



This camshaft has exceeded my expectations. Let me explain... ... ...



Piers Cam improves turbo spooling, egts, fuel mileage while towing (I seldom check mileage empty), it broadens the torque curve of the engine, makes less smoke and more horsepower. The additional HP may only apply if you have fueling mods but the cam definately pulls harder near defueling rpm.



The cam does not give the "instant gratification" of a good set of 100hp injectors or a major fueling box. The cam change may be even more subtle then a turbo change. But most fueling or air modifications have draw backs such as higher egt's, more smoke off (or on) boost, turbo lag, turbo housing too slow for towing, high boost/blown head gaskets, etc. This cam doesn't have any negatives (other then the purchase and installation). It has performed well with the Bully Dog 8's injectors on down to the DD1's that I'm presently running. The big B1 Bomber turbo spools as quickly with the DD1's as it did previously with DDIII's (no electronic enhancement turned on).



Overall my experience with the PDR camshaft is all positve--no drawbacks. The installation is not for those that struggle with oil changes but is doable for serious home mechanics that own a service manual. I believe that the PDR cam delivers more air ... ... ... a good thing for the ISB .

Larry

 

[Fred Swanson]

I've had the DD cam in the 2000 for close to a year. Dynoed before installing, and then again at May Madness last year.

What was very apparent was the quicker spoolup, less smoke, slight mileage increase, and the dyno graph clearly shows the HP difference, and where the HP peak is.

I drove it that way for at least 30,000 miles, through a 118F summer, and all with a 93% DTT TC. Max EGT's were right at 1300F under max fueling, with 2 different gauges, first the SPA, then the Autometer.

Add to that towing my 30 ft. gooseneck with Dodge Diesel trucks on it around. Smoke in the summer months is a real problem here, and with the cam, it was cleary reduced.



With my setup(in sig except I ran DD3's at the time) you can see the HP start at a lower RPM, and carry to a higher RPM. Very noticeable.



Now before I delivered it to Ed via a ship to go to Hawaii, I changed the DTT TC to an 89%. Let's just say, the truck really changed after that. Spoolup was again, quicker.



Maybe Ed will post his thoughts now that the truck is in a tropical climate.

 

[F8LDOSE]

Devil Dog, the billet cam is being run to 6000rpm in several trucks. I 'm using a main girdle also, but i was told for reliability , keep it around 5000rpm. The marine cam on the other hand has broke in many trucks at around 4500rpm, in the front of the cam behind the gear, so to keep it safe with that cam, say 4000rpm. So if your planning on running high rpm, it's probably worth it to spend the 1500 bucks(can't remember what i payed excately) and be done with it. Like someone else said... . horsepower cost$$$$ how fast ya wanna go?

 

[HVAC]

Stock Cam

Wanna race? Oo.



Wanna dyno?Oo. Oo.

 

[Jetpilot]

Wanna race? Oo.



Wanna dyno? Oo. Oo.

Yup... ...

 

[Sled Puller]

Doug, call the tower, yer lost again!!!

 

[KatDiesel]

Originally posted by Todd T

Eric? please help us here? Larry you too, what are you seeing on the streets with your truck?



thanks

Todd

I'll reply tommorrow regarding this, headed to work right now.

 

[Devildog]

There must not be many DD cams out there, I was hoping for more replies from them... ... .

 

[KLockliear]

I do believe the vast majority of our cam customers were not TDR guys. Lets see, for TDR members, Stephan from DTT has one, Floor It, Kat Diesel, Bob Claybaugh (not sure his handle), Jim Fuller (CUMMNTSKRKN), Brett from Edge Products and Fred Swanson are all I can think of off the top of my head.



Given that, it looks like TDR members make up less than 10% of our customer base on this product.