Dr. Peformance Camshaft Kit

[HEMI®Dart]

I saw an older Dr. Performace ad in the TDR saying he has Camshafts. Made from solid billet. 37hp/72 ft lbs increase. About $400 bananas.



Does anyone know anybody running one?

 

[HillCountrykid]

Read the fine print

That was probably 3. 7 hp/7. 2 ft lb.



I'm sure you were expecting some of this.



Brian

 

[HEMI®Dart]

That still beats DD's Cam, +7 hp gain for 2500 bananas.

 

[HillCountrykid]

By how much they charge, that might be $40,000.



Really, I don't see how anybody can sell a billet cam for a Cummins for $400. Too much R&D.

 

[KatDiesel]

Originally posted by HEMI®Dart

That still beats DD's Cam, +7 hp gain for 2500 bananas.

Where do you get the 7hp number? DD doesn't advertise any horspower gain. Its the other benifits of the cam that you buy it, not more power (directly from the cam).

 

[HEMI®Dart]

Kat,



I thought I read somewhere in the forum that the DD Cam made about 7 hp more. I understand that it isn't designed for a massive HP & Torque gain.

 

[KatDiesel]

Well some people saw I made 512hp one day and then 504 another day so they guessed the cam was worth 7hp.



I did 512. 5hp the day of the cam install. I took out my Edge chip and put in a DD version... . and on dyno day (next day) it produced 504. 7hp... . I put my chip back in the COMP box. So thats where you saw the 7hp figure.

 

[Strick-9]

There are dyno charts on DD's website that show before and after a cam install. It shows less than a 20hp gain.



I understand that cams don't make power, but it sure looks bad when you have a before and after dyno chart showing 20 HP and a pricetag of $2500.



They should have pictures of mileage calculations showing the gains of 3 mpg and EGT reductions of 150+. Now THAT is worth $2500.



-Chris

 

[Don M]

There is no cam that can give you 37HP in the rpm operating range of our trucks. If you want to move the power band and rev it higher you may be able to pick up a few horses. It will take away some low end power though.

With todays rev limit problem for the 24 valve guys high rpm cams wont work anyway.

Bottom line is 37HP is never gonna happen no matter what you try in the stock rpm range.



Don~

 

[Vaughn MacKenzie]

Not HP, but spoolup

Guys, the point of DD's cam has less to do with HP than it does with drivability and improved turbo spoolup time. The cam lets more air flow through the engine which gives more volume to the turbo to get it spinning up quicker. It probably helps cut exhaust temps a little too because of improved airflow.



Vaughn

 

[Chipstien]

To get sort of back on topic....

$400 seems extremely low and toooo good to be true.

 

[Sled Puller]

$ 400 low for a cam?



What cams have you bought lately that are more?

 

[Doubleclutch]

Since cams don't make horsepower, a more accurate method of showing the cam's benefits would be to show how much power can be made at a fixed EGT with/without the cam. Add more fuel to match EGT and read the dyno. An Apples/Oranges kind of thing that would really shorten this thread.

 

[Chipstien]

Sled puller

Good point. Most expensive Cam I have purchased is a Comp cam for $200. But they were not billet either. They were forged then ground to spec. Billet is a lot of work and alot more money.

 

[Joseph Donnelly]

DD white truck, 580 hp on #2 only, all through the injection pump

DD blue truck, 600 on #2 through P7100

Sickly 12 valve, 633 on #2 through P7100, of course [the same pump it came with 130,000 miles ago, and all original parts in fueling section]



DD Cam doesn't work?

215 hp P7100 is only worth 20 hp over 175 pump, right Chris (that is what you posted a while ago). Gee simple subtraction 633-20-480=133 hp unaccounted for :--) I don't recall if 480 was the right dyno number

 

[TxDieselKid]

Originally posted by Joseph Donnelly

DD white truck, 580 hp on #2 only, all through the injection pump

DD blue truck, 600 on #2 through P7100

Sickly 12 valve, 633 on #2 through P7100, of course [the same pump it came with 130,000 miles ago, and all original parts in fueling section]



DD Cam doesn't work?

215 hp P7100 is only worth 20 hp over 175 pump, right Chris (that is what you posted a while ago). Gee simple subtraction 633-20-480=133 hp unaccounted for :--) I don't recall if 480 was the right dyno number

Joe,

Are you trying to mislead us? Your saying that 133 hp from the DD cam? Get real. There is NO way it will make 133 hp, and then in Kat's ride it only made 7 hp. The DD cam is NOT for horsepower, it is for faster spoolup, remember ?

Originally posted by: KLockliear



150+ degree drop in EGT

Spools the turbo up about 40% quicker

Reduces about 40-50% of the smoke

Increases fuel mileage



Notice I didn't say it adds HP. It doesn't. HP doesn't come from air with diesels, it comes from fuel. What the cam DOES do though is allow you to put in more fuel, by lowering EGT's and reducing smoke.

So what is the deal Joe, does it or don't it?



Andrew

 

[Strick-9]

Joe,

Since I'm the only Chris in this thread, I guess that was directed at me.



Read through the thread again start to finish. Hemi understood that the cam was only worth 7 HP. Then Katdiesel comes on and says that DD doesn't advertise a HP gain and the reason the cam is so good is for the other attributes (EGT, smoke, spoolup, MPG).



I came on to clarify that DD DOES advertise a HP gain with the cam and it is on their website for ALL to see. It shows about 20 HP although its hard to tell anything more precise.



I wasn't knocking DD by any means. I have a great respect for Lawrence and his deep understanding of airflow and fuel mixing.



On my personal truck I'm sure the DD cam would make for MUCH greater than 20 HP due to all the fuel I'm wasting out the tailpipe.



BTW, I was a little confused about your subtraction equation. I have the 215 P7100 (913 variety) and I have never dyno'd 480 on #2. Someday maybe if I don't run out of money first.



-Chris

 

[KLockliear]

Chris, I think Joe was talking about Chris Anderson (Cummins Corvette), not you. While the dyno graph does show a power gain, we do not attribute it to the cam... the graph is there to show how the power comes on sooner during the dyno run - which is what the cam is designed to do.

 

[KatDiesel]

Originally posted by TxDieselKid

and then in Kat's ride it only made 7 hp. The DD cam is NOT for horsepower, it is for faster spoolup.

Again through this number out the door. The day of the cam install it made 512. 5hp with my COMP chip in the truck, I swapped to a DD COMP chip to try it and left it in for dyno days, where the truck made 504. 7 hp.



SO I didn't gain or lose those 7hp from the cam change.



Yes it does spool up faster. I am still waiting to use some fuel for milage comparision, EGT's are still warm with the turbo I am running. . I'm waiting for a B1 with a KwikSpool housing to try.



I'm also installing a back pressure gauge here soon, so I can have further testing data on my turbo swaps.

 

[Joseph Donnelly]

Chris, I thought it was you, but I may have been having a senior moment. I thought you posted that the 913 pump only gave you about 20 hp over the 175 pump and that the $2K seemed to much to spend for that kind of gain. What I was trying to point out with a poor attempt at humor is that the package is what works together, and the camshaft is part of the package. Everything has to be tuned together when you try for high hp. With the airflow stuff, we are trying for more drivability, less smoke, lower egt. However, even with the fuel stuff, just bolting on a bigger pump or smokier injectors, doesn't mean you will immediately get the hp gain you hope for, or what someone else got.



Some folks were surprised at MM to see Lawrences, Mark's and my truck had only one turbo each, and no conglomeration of solenoids, hoses, etc. Big difference from some other high hp trucks. One person running nitrous on his truck took an hour finding the nitrous on Mark's



Billet steel camshafts are probably not compatible with the Cummins lifters, maybe not with the block either (only #1 journal has a bearing).



Remember the $2500 for the DD cam includes all parts and installation.