Ph4tty

Both are going to provide more air and improve drivability. It just seems to me on a dozen or so recent threads that when people want to lower egts on their rigs the suggestion is always twins and never a cam.

So for the many overfueled trucks in dtr- wouldn't an aftermarket cam be a viable solution for lower egts and be less costly than adding a second turbo?? In some cases it might even be cheaper than an aftermaket turbo in the first place. It seems like most the guys running cams have twins already.

Is the cam a good alternative to twins, especially for guys not looking for stupid power? Am I correct in thinking cams are an overlooked bomb? Especially since a cam can help solve the lift pump probem,....

Just something I've been pondering for the last month or so

Marine

That is a good question. Even maybe a cam and a bigger turbo?

displacedtexan

I am not the expert, but I was thinking the same thing, especially for guys wanting a 400-450hp rig, possibly with the stock turbo.

So any reason why not?

PourinDiesel

Cams are overlooked because they dont offer that 5 minute instant power like a fueling box or a new set of twins can offer.
Also a cam is some serious work.

To me its a no brainer; a cam is part of the performance puzzle that many over look.

There are many different cams out there to choose from but any of the 3 (or more from F1) seem to fit most needs.
Valve springs are also overlooked because most dont have any idea on how to install them and there isnt that "instant power gain". But even springs by themselves will increase your horsepower indirectly and make your engine function properly.

Overall hp gain and egt decrease twins are great. But with the boost pressure increase from twins that puts you back at needing springs...

Pieces of the puzzle guys.

If you want to hear some valve float (about a seconds worth) from a high boosted 2001 24V watch the video in my sig. The 2nd truck is mine and there is not float with the same rpm.

Sorry if I sidetracked the thread in any way.

The burgundy 01 in the video dynoed 621rwhp on a single turbo on diesel only on David's Dunbars dyno....its probably getting a cam/springs this winter.

redstreak

A cam would be a great addition to anybodies truck who was looking to lower EGT's and seriously improve spool up. People as a rule probably don't look into the cam option as quick because it's not a 'horsepower' adder. I will say this - my Helix 2 is a horsepower extender. With that cam she digs on into the redline and wants more.

Marine

Good points.
Will a cam reduce EGT's as well? (never mind, we posted at the same time).

LanceD

how would a big cam affect driveability with a stock turbo?

Marine

Redstreak and PourinDiesel,

So if someone was to do the cam and springs, what other work should be done while you have everything apart?

PourinDiesel

A "big" cam...Lets just say you installed a Helix 2 in there. I think you would be really happy even with a stock turbo. BUT....you would probably need to upgrade turbos to really enjoy the benefits.

signature600

Actually, I'll bet you could push that stock charger to a bit more power before EGT's got crazy. Remember, it's not about boost, but AIRFLOW. The cam helps get more airflow.

Now, if you're pushing your stocker to 45psi, the cam won't help much on the stocker. If you keep the turbo in it's efficient range, EGT's should go down!

Chris

Marine

So the cam and springs would work really well with Mach 4's and a Dodgezilla 14 Wastegated?

signature600

Maybe...HOHN seems to think so! Peronally, since you have to buy a Dodgezilla anyway, I'd go with a BD Super B. That little charger has impressed me

Chris

Marine

the BD is an S300, correct? From what I understand, the S300 will give me more top end power, lower EGT's, but will have more bottom end lag. I want the better bottom end for towing, and the EGT's wont be that big of a difference between the 2.
The Dodgezilla is also about 500.00 cheaper.

signature600

The Super B is an S200/S300 hybrid...smaller compressor wheel, a "bit" bigger exhaust side than a Dodgezilla!

I'll bet the spool is about the same, and the Super B runs better on the top end, and is a tougher turbo to boot! The Super B's really spool well for the way they cool!

I have a thing against Holsets...I hurt them too easily

Marine

Ok. Thanks, I'll look into it.