I'm ultimately going to get both an H2 cam (and springs) and either a Silver 62, or a SPS6280; however, with the stock turbo, would the cam upgrade done first:

1. add much power?
2. decrease EGTs?
3. spool the turbo any sooner?

Or, overall, is the turbo upgrade going to improve these factors enough that it should be done first?

 

Tony,

I would recommend the cam and springs from Don to anyone wanting to upgrade their truck.
The modification is often overlooked but ask anyone who runs a cam if they would do it again and the answer is always yes.

I would do a Helix 2 and Springs again in a hearbeat.

 

Justin, what will the cam do for a guy. How much of an improvement will it give me in the 1/4 mile

thanks

Kevin

 

Improve spool up, let the engine breathe better/easier, lower wot egt's etc.

Springs will gaurantee a proper combustion event everytime.

 

I was thinking I would work on the engine internals before going to a larger turbo. Don's Helix 2 cam and springs are definitely the way to go.

I don't really expect a cam to add much power, but keeping the EGTs down at WOT or while towing would be good.

 

Can the better springs be added without the cam to improve the efficiency of the stock valvetrain?

 

Ive been reading the cam debate on the Competition Diesel site, good read. But somewhere in that huge thread it said springs are a good investment even without a cam. Wish I could get you direct quotes but I am far to lazy to shuffle thru the whole thing again. Check it out.

 

Thanks Rye, and don't worry about quotes. I can do the research, just like to throw out the idea before I waste too much time if its a no go.

 

they are both good mods, i think

make sure you need more air (turbo) before you go swapping turbos

 

I've heard from TDR that the PDR cams will give you maybe 2 MPG increase and also lower the max torque peak something like 300 or 400 RPM. Of course you get better EGT's and driveability too. Stock cams are good for emissions, though!