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post #1 of 44 (permalink) Old 05-21-2010, 02:59 AM Thread Starter
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Cams

So I am wondering what the benefit of a Cam on a powerstroke is? Does anyone have any factual data to back up any claim? What kind of gain would you see with one?

Do they do anything - really?

Sam

The Trash Truck
96 CC F350 SRW - Built for SVO and mileage
Go Green - HotFox, Dual Heated Dahl 100s, Fuel Filter Coolant Wrap, ArcticFox
Go Fast - Hybrids, H2E, 6.0 IC, Fuelab, BTS 144.2/291.5 uncorrected


thanx
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post #2 of 44 (permalink) Old 05-21-2010, 04:02 AM
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Re: Cams

Here is some reading for you from somebody that believes that cams can make a difference!
https://powerstrokenation.com/forums/...ad.php?t=62000
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post #3 of 44 (permalink) Old 05-21-2010, 12:56 PM Thread Starter
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Re: Cams

I was hoping for feedback from someone not trying to sell a Cam...

Sam

The Trash Truck
96 CC F350 SRW - Built for SVO and mileage
Go Green - HotFox, Dual Heated Dahl 100s, Fuel Filter Coolant Wrap, ArcticFox
Go Fast - Hybrids, H2E, 6.0 IC, Fuelab, BTS 144.2/291.5 uncorrected


thanx
Rockin-S-Performance - Install, tech support, and advice
Diesel Innovations - Killer Deal on Parts
Tony Wildman/SWAMPS - Tuning
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post #4 of 44 (permalink) Old 05-21-2010, 01:49 PM
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Re: Cams

Wasn't trying to sell anything give him a call or ask him a few questions. Just trying to point you to somebody that may know! There have been quite a few responses in that thread. Try sending a pm to some of the people that have or have ran a cam.
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post #5 of 44 (permalink) Old 05-21-2010, 02:12 PM
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Re: Cams

i ran one in my blown motor and when i had my motor built i felt it was worth it to get another one.

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'84 f-350 2wd, 6.9l, 4spd, drw, flatbed. For Sale

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post #6 of 44 (permalink) Old 05-21-2010, 02:17 PM Thread Starter
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Re: Cams

Quote:
Originally Posted by bigjake0524 View Post
Wasn't trying to sell anything give him a call or ask him a few questions. Just trying to point you to somebody that may know! There have been quite a few responses in that thread. Try sending a pm to some of the people that have or have ran a cam.
I am sorry - I didn't mean to imply that you were trying to sell something. I meant Matt is trying to sell something in his thread. I was trying to see if people in the real world had knowledge/experience they would share. Similar to powerstrokenstang's post. I appreciate the post, I read the entire thread and then all of the linked threads in it. Had some really good information.

Sam

The Trash Truck
96 CC F350 SRW - Built for SVO and mileage
Go Green - HotFox, Dual Heated Dahl 100s, Fuel Filter Coolant Wrap, ArcticFox
Go Fast - Hybrids, H2E, 6.0 IC, Fuelab, BTS 144.2/291.5 uncorrected


thanx
Rockin-S-Performance - Install, tech support, and advice
Diesel Innovations - Killer Deal on Parts
Tony Wildman/SWAMPS - Tuning
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post #7 of 44 (permalink) Old 05-21-2010, 03:00 PM
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Re: Cams

There are several that have ran them, most seem to like them. From what I have read, I don't however have any personal experience running a cam. I would like to try one though to see if it is something I would like for a daily driven application.
Wasn't trying to come across as pi$$ed off or anything!
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post #8 of 44 (permalink) Old 05-21-2010, 03:25 PM
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Re: Cams

Quote:
Originally Posted by genie144 View Post
I am sorry - I didn't mean to imply that you were trying to sell something. I meant Matt is trying to sell something in his thread. I was trying to see if people in the real world had knowledge/experience they would share. Similar to powerstrokenstang's post. I appreciate the post, I read the entire thread and then all of the linked threads in it. Had some really good information.

Sam
We will know some more results in the comming weeks. The stage 1 is doing well right now. So far the cam is doing everything I wanted it to and some things I didn't count on as well. I took a different approach than what's been done before but knew what to expect. So far:
Positives-
Lower EGTs when cruising and under load
Broader powerband
Lower boost at WOT (keeping turbo in it's map)
No loss in drivability above 1200 rpms.
Possible mileage increase due to lower pumping losses and better Volumetric Effeciency at cruise RPMs (will need more testing to verify).

Negatives-
Lower dynamic compression at idle that must be tuned out with a little extra timing compared to the stock cam. This goes away by 1000 rpms.

Matt Robinson
Gearhead Automotive Performance

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If you have nozzles that were Extrude honed over and over and over again. It will look like a porn stars ass.hole where the pintle is supposed to seal.
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post #9 of 44 (permalink) Old 05-21-2010, 03:42 PM
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Re: Cams

This could be a really good discussion if it was filled with facts about how a cam works and not opinions. I will be the first to admit that I have very little knowledge when it comes to this subject. It seems as there must be some black magic to it or something. I would love for some of the old farts around here that have the knowledge to share it.
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post #10 of 44 (permalink) Old 05-21-2010, 04:02 PM
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Re: Cams

Quote:
Originally Posted by UNLIMITED_DIESEL View Post
This could be a really good discussion if it was filled with facts about how a cam works and not opinions. I will be the first to admit that I have very little knowledge when it comes to this subject. It seems as there must be some black magic to it or something. I would love for some of the old farts around here that have the knowledge to share it.
The problem is that everything that usually applies to cams doesn't work on the 7.3 because of it's unique construction. On diesels in general you can move the powerband up just like a gasser but you must pay special attention to things because you have compression ignition. The more duration you add, the more you have to deal with overlap (bad) and/or loss of cylinder pressure (also bad) in the lower rpms. The goal is get the right amount of airflow in the range you want to make peak power and nothing more. But I can tell you this, for the size of the engine we have the stock cam isn't enough to let the engine breathe properly even with ported heads. It's always a compromise though, you are basically taking away bottom end to gain top end. The trick is moving the VE of the engine enough to make a difference while not moving it enough to hurt drivability in the desired rpm range. Even in the gasser world, everyone has to install a higher stall converter if they want to make peak power at 6000 rpms. I don't think it is worth it though for someone to have a 3000 stall converter on a street diesel . I just want to see a 7.3 start carrying some torque out to 3000+ RPMs instead of doing the grand canyon we are used to seeing.

Matt Robinson
Gearhead Automotive Performance

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If you have nozzles that were Extrude honed over and over and over again. It will look like a porn stars ass.hole where the pintle is supposed to seal.
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