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Old 11-16-2013   #1
spoolin d dub
 
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The Thruth on Cam Advertised Duration Etc

Here is some good info to read. This is from a Evo 8-9. Yes I know they are two different motors but I use the numbers as a reference to convert to DSM specs e.i. intake duration @ .050 lobe lift: 211.5 is universal on cam analyzer. So the breakdown speaks for itself and gives an idea of the real numbers vs advertised numbers.
4g63 Camshaft Research: The truth shall set the tires free!!
It gets really good when they get to the Evo 9 FP4R cams on the cam analyzer. Here are the advertise specs of the Evo 9 FP4R version 1 & 2. Both have more duration then the DSM FP4R (from what I have researched every evo cam has more duration then the corresponding dsm cam).
http://store.forcedperformance.net/m...s/evo94rv1.pdf
http://store.forcedperformance.net/m...s/evo94rv2.pdf

If you want to cross reference here are some evo cams at 1mm advertised duration. Also Jun 272 peak lift is advertised as 10.8 but shows 0.41829 =10.6mm on the cam analyzer.
Cam Specs Thread - Updated - evolutionm.net
I will say this. I have to give props to Darren at FFWD. He is the only person my machine shop and I have ever seen that posted the true specs of cams. They have always been there. Most just dont understand them.
http://www.ffwdconnection.com/dsm/dks/dks3.html
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Old 11-17-2013   #2
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Re: The Thruth on Cam Advertised Duration Etc

I ran IX 4R cams with stock springs...whoops
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Old 11-17-2013   #3
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Re: The Thruth on Cam Advertised Duration Etc

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I ran IX 4R cams with stock springs...whoops
To what rpm?
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Old 11-17-2013   #4
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Re: The Thruth on Cam Advertised Duration Etc

Interesting that stock 9 cams are similar to the DSM HKS 272's.
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Old 11-17-2013   #5
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Re: The Thruth on Cam Advertised Duration Etc

Heh this info is kinda old but good! Cams are a mystical and magical thing.

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I ran IX 4R cams with stock springs...whoops
LOL I'm still loving this. I think the only thing that saved you was the rev limiter and some luck! Then again, Jim ran 4R's in his IX on stock valvesprings as well--to like 8400rpm on the drag strip!

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Interesting that stock 9 cams are similar to the DSM HKS 272's.
Yea man, the stock mivec cams on the 9 and 10 are really pretty dang fantastic out of the box. With the right sized-snail they can go very far!
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Old 11-17-2013   #6
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Re: The Thruth on Cam Advertised Duration Etc

I run FFWD KING KAMS. Almost everyone blasted them and called the Kelford and/or FP 5R regrinds/clones. That just verified to me what I already knew. Which is most don't have a clue about what they are looking at. Because the real specs of KING KAMS were posted right on it's page in the cams description from the cam analyzer. My from the cam analyzer my intake cam is bigger then DSM FP 5R's advertised duration and my exhaust cam is damn near bigger then the DSM Kelford 280 advertised duration and i mean damn near. I wanted to rev to the moon and back. Thats why I bought the KING KAMS and I got the last set made. But alot of people would have loved the cam. If they knew what they were looking at lol.
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Last edited by spoolin d dub; 11-17-2013 at 02:30 PM..
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Old 11-17-2013   #7
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Re: The Thruth on Cam Advertised Duration Etc

I thought cams were just for that sweet sweet engine lope???
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Old 11-17-2013   #8
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Re: The Thruth on Cam Advertised Duration Etc

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To what rpm?
7,800
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Old 01-23-2014   #9
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Re: The Thruth on Cam Advertised Duration Etc

Update and a damn good read!. February 2014 issue of dsport magazine. They themselves just did a unbiased evo cam showcase. Part 1 only showed a few cams that were tested and all the other cams will be shown in part 2! They show the real duration (cam pro analyzer) vs advertised and also dyno'd them. I linked pics of the article. Which shows the kelford 264, 272, and 280 real cam data!!!!!! Down to the volumetric efficiency of the cams.....throughout the rpm range!!!


http://i307.photobucket.com/albums/n...ad8cd9254e.jpg
http://i307.photobucket.com/albums/n...af0bde5586.jpg
http://i307.photobucket.com/albums/n...e659b54e8b.jpg
http://i307.photobucket.com/albums/n...a31cea976b.jpg
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Old 01-23-2014   #10
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Re: The Thruth on Cam Advertised Duration Etc

Impressive gains!
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Old 01-23-2014   #11
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Re: The Thruth on Cam Advertised Duration Etc

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Impressive gains!
Yep. Part 2 will have the other 14 cams they tested!!
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Last edited by spoolin d dub; 01-23-2014 at 02:39 PM..
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Old 01-23-2014   #12
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Re: The Thruth on Cam Advertised Duration Etc

Hmmm Kelfords. I'd like to see GSC's tested.
Need to find a good replacement for these stockers.
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Old 01-27-2014   #13
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Re: The Thruth on Cam Advertised Duration Etc

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Hmmm Kelfords. I'd like to see GSC's tested.
Need to find a good replacement for these stockers.
You'll see GSC cams. Although I haven't seen the results I'm take a shot and say the GSC will be close to the kelford's. We'll know soon
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Old 01-27-2014   #14
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Re: The Thruth on Cam Advertised Duration Etc

I have Kelfords, this is good lol
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Old 01-27-2014   #15
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Re: The Thruth on Cam Advertised Duration Etc

I just like GSC's because even though they are only a few years old, they re did them after about a year or so.
Basically they continue to improve their cams and released a set for stroker DSMs
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Old 01-27-2014   #16
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Re: The Thruth on Cam Advertised Duration Etc

I too am very interested in gsc. I just wonder if all the big boys are running kelford because they are no doubt top two and maybe get a little incentive to run them? either way it's most likely a wash between them
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Old 01-28-2014   #17
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Re: The Thruth on Cam Advertised Duration Etc

Hum, what about dial indecators, degree wheels, and solid lash adjusters. I have degrees cams a lot in the 4g63 and 6g72 motors and have a lot of good info written down.
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Old 01-28-2014   #18
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Re: The Thruth on Cam Advertised Duration Etc

^well make a thread then.
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Old 01-28-2014   #19
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Re: The Thruth on Cam Advertised Duration Etc

That would be some awesome info for us who still can't decide between them.
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Old 01-28-2014   #20
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Re: The Thruth on Cam Advertised Duration Etc

Thruth lol
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