Off the shelf Cam- Dyno results
06-23-2016 | 10:16 AM
#92
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
Top of Page 29; http://www.compcams.com/Technical/Ca...terCatalog.pdf
Lobes 13861 and 13862 as I posted specs above.
Lobes 13861 and 13862 as I posted specs above.
06-23-2016 | 10:44 AM
#93
Registered
Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
Top of Page 29; http://www.compcams.com/Technical/Ca...terCatalog.pdf
Lobes 13861 and 13862 as I posted specs above.
Lobes 13861 and 13862 as I posted specs above.
It be interesting to see the lifter acceleration rates between Full Forces 241 .680 lift cam, and the HUC 243 .675 lift cam. Without knowing the rated duration on full forces cam, how can you tell?
06-23-2016 | 01:02 PM
#94
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
I just completed a swap from a CompCam with 13054/13056 lobes over to a custom grind with almost identical duration numbers @ .050 and same LSA but with higher lift (663/671). We saw a gain of 100 rpm in the boat on the big end without re-jetting. The theory that the Brodix BB3 Xtra 354's would like added lift worked. It was a $500 gamble that paid off.
https://youtu.be/u-5P0vw1UqQ
06-23-2016 | 01:06 PM
#95
Platinum Member
Joined: Jun 2004
Posts: 7,321
Likes: 1,039
From: frankenmuth michigan
A while back my 540 blown made 1115 hp, made in 650's NA with blower cam (thin oil) I think was 248/255 @.050 and .650 lift at 8.3-1 compression using modified MPI intake, made in 640's with thick oil, last time same motor and intake but with even bigger cam i think at 255/263 at .050, 680 lift made 630-635 hp NA on my own dyno, way to much cam for low compression motor built to run supercharger, dynoed it to have a NA tune for when blower fails or running saltwater, hoped to make more BUT compression vs a ton of duration is going to be sluggish at a certain point so it is what it is, Smitty
06-23-2016 | 01:28 PM
#96
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Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
A while back my 540 blown made 1115 hp, made in 650's NA with blower cam (thin oil) I think was 248/255 @.050 and .650 lift at 8.3-1 compression using modified MPI intake, made in 640's with thick oil, last time same motor and intake but with even bigger cam i think at 255/263 at .050, 680 lift made 630-635 hp NA on my own dyno, way to much cam for low compression motor built to run supercharger, dynoed it to have a NA tune for when blower fails or running saltwater, hoped to make more BUT compression vs a ton of duration is going to be sluggish at a certain point so it is what it is, Smitty
06-23-2016 | 01:42 PM
#98
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
06-23-2016 | 06:16 PM
#100
Registered
Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
In my case I am the builder, I used Bob because he was recommended to "design" my heads, cam, and valvetrain combo...I got a weak recipe and one for potential disaster. lifter to bore clearance advice I asked about was off, and the "custom made for me and marine use" heads were not made custom at all, just had Inconel valves... he bashed me to others behind the scenes and also guys said "any engine builder should know better" well I am not a builder by trade and Bob knew that, he should have made some different choices in advice knowing that....
it's over now, engines run great and I am boating, however to spend 35,000 and go slower sure still hurts...
it's over now, engines run great and I am boating, however to spend 35,000 and go slower sure still hurts...
http://www.chevelles.com/forums/13-p...o-results.html
