Reground cams

[WOTURBO]

Looking at cams, how many people would use a reground cam? Any down sides? 2006 hpcr

 

[p-Bar]

I would never use a regrind brother had one in his motorcycle didn't last long . Billet only way to go.

 

[AH64ID]

I ran a regrind in my 05 for nearly 40K miles, when pulled it looked great and I then sold it. I now run a new cast cam from Hamilton, but that was my only option for the grind I wanted.

It is very important to replace the tappets and add a ZDDP additive for the cam break-in, especially with a regrind. If the tappets don't start spinning you will lose the lobe.

 

[Shadrach]

I think regrounds are OK IF it is done by a reputable company, and yes ALWAYS replace the tappets as well. David

 

[Joseph Donnelly]

Billet cvams afaik aren't available for the Cummins, and would likely be incompatible with the stock lifters. I have used regrinds with no problems if they are made well and the specs aren't so radical that the grinder goes through the hardened layer (which I have been told the lobes have).

 

[Joseph Donnelly]

Can't edit, sorry, billet _cams_

 

[AH64ID]

Billet cvams afaik aren't available for the Cummins, and would likely be incompatible with the stock lifters. I have used regrinds with no problems if they are made well and the specs aren't so radical that the grinder goes through the hardened layer (which I have been told the lobes have).

There are companies selling new billet cams.

Hamilton and Colt are two that I know of off the top of my head, and their are others I have read about.

 

[p-Bar]

I would never use a regrind brother had one in his motorcycle didn't last long . Billet only way to go.

I know we didn't replace the tappets could have explained the problem.

 

[jelag]

So I've found the journals on the cam small.... .010" under specifications.... I've never seen a cam wear the journals and not the lobes.... so I'm looking for a new cam.... my question is that if the engine is stock, and my only alternation is an edge box for towing.... what I can tell all it does is raise the fuel pressure some... is there a benefit to move from a stock grind to something else... the truck is an 05... tows 85% of the time, and its a 15K 5er... Since I have to replace the cam... I thought I'd ask.... BTW broken rings and excessive oil consumption...

BTW - I'm in the pacific northwest... almost every trip is over mountains and at least once a year over the divide....

 

[AH64ID]

I would drop a Hamilton 178/208 in there without thinking twice about it, especially since you upgraded the turbine wheel.

 

[jelag]

178-208-106.5 LSA Cast Cam .290"/.320" I assume this is the cam your talking about..... but I'm still back to my original issue... I've never had a cam come out of any engine I've ever had apart where the journals where worn and the lobes were in good shape.... its usually the cam lobes that go away... I guess that my other thought is that when I've found bad lobes I've not looked at the journals... Just replaced the cam....

 

[RVTRKN]

I would drop a Hamilton 178/208 in there without thinking twice about it, especially since you upgraded the turbine wheel.

What Cam did you install on your CTD rebuild, if you changed it out. And any updates on the rebuild, I've been busy the last 30 days so I haven't been following TDR as closely as I normally would have.

 

[NIsaacs]

So I've found the journals on the cam small.... .010" under specifications.... BTW broken rings and excessive oil consumption...

With 125k miles I don't think a Hamilton Cam will fix this issue. If it were me, I would be looking for answers as to why?? Jim, are you deep enough into the engine for any ideas yet?

Nick

 

[AH64ID]

178-208-106.5 LSA Cast Cam .290"/.320" I assume this is the cam your talking about..... but I'm still back to my original issue... I've never had a cam come out of any engine I've ever had apart where the journals where worn and the lobes were in good shape.... its usually the cam lobes that go away... I guess that my other thought is that when I've found bad lobes I've not looked at the journals... Just replaced the cam....

All of that could be from too much soot, which the 04.5-07's are known for.

That is the cam I am talking about, it's now a 110LSA which gives it a better pull thru 3000.

Have you looked at the block to see how it looks where the cam rides?

Are the journals uniform? Is it possible it was small to begin with? What do you use for oil and filtration?

What Cam did you install on your CTD rebuild, if you changed it out. And any updates on the rebuild, I've been busy the last 30 days so I haven't been following TDR as closely as I normally would have.

I went with the Hamilton 178/208 and it is a torque making cam for sure.

Engine is up and running with about 1200 miles on it. It's super smooth, quiet, torquey, and doesn't smoke at all. I have done a little towing with it and am quite happy with how it's running. I plan to dyno it to get it back to where I like the power, 325 rwhp at 2000 rpms and 400 at 2500, and 425-450 at 3000.