Custom cam thread
10-05-2016 | 03:22 PM
#21
Registered
Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
540ci
8.2cr
243/249 @.050
114 LSA
.662/.647 Lift
8.1 L firing order
Vortech Centrifugal Super charger
AFR 325 CNC chambers
At this point I am seriously considering not even taking a chance on this "Custom" Cam and going with something off the shelf. When this project started reliability was the Highest of priority with a stable long life valve-train and a target HP of 800HP was the Goal@6000rpm. I was willing to sacrifice max hp for reliability
Motor is sitting in my shop with short block assembled, camshaft installed ready to bolt together. Unfortunately I have lost interest in the project. I let myself get led along by Bobs BS for over a year and finally had to distance myself from him. What I found interesting was how quick he was to point to others for his repeated failures to deliver as promised. I have since spoke with a couple of individuals Bob pointed to with fault and it turns out Bob is the one not them who didn't deliver. Not a Fan of MK done with this jerk off.
8.2cr
243/249 @.050
114 LSA
.662/.647 Lift
8.1 L firing order
Vortech Centrifugal Super charger
AFR 325 CNC chambers
At this point I am seriously considering not even taking a chance on this "Custom" Cam and going with something off the shelf. When this project started reliability was the Highest of priority with a stable long life valve-train and a target HP of 800HP was the Goal@6000rpm. I was willing to sacrifice max hp for reliability
Motor is sitting in my shop with short block assembled, camshaft installed ready to bolt together. Unfortunately I have lost interest in the project. I let myself get led along by Bobs BS for over a year and finally had to distance myself from him. What I found interesting was how quick he was to point to others for his repeated failures to deliver as promised. I have since spoke with a couple of individuals Bob pointed to with fault and it turns out Bob is the one not them who didn't deliver. Not a Fan of MK done with this jerk off.
Last edited by getrdunn; 10-05-2016 at 03:24 PM.
10-05-2016 | 10:14 PM
#24
Charter Member #394
Joined: Nov 2000
Posts: 534
Likes: 38
From: CA
555ci JC Performance/Smith Power
Brodix 2x heads
Roots blown
6lbs boost
262/272
112 LSA
109 ICL
708/708
Crane solid roller cam, lobe designs from track roller profiles.
Using same cam in a 573 now
Tried Comp Cams same specs, made more boost but less power so numbers don't always tell the whole story.
10-05-2016 | 10:51 PM
#25
Thread Starter
Registered
Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
On the 555cid; ran at 5900rpm WOT. Made over 850 at 6300 on Brad's dyno. Have a short video of it idling but cannot post it, says it's too large; it idles at 1100rpm, 700rpm in gear with no surge. Doesn't matter which carbs either; same idle using three different sets (differing CFM), it's easy to tune. I should mention that the Comp Cams steel billet cam was ground on a 114 LSA. I think that's where the boost was gained and where the power was lost in this combination.
555ci JC Performance/Smith Power
Brodix 2x heads
Roots blown
6lbs boost
262/272
112 LSA
109 ICL
708/708
Crane solid roller cam, lobe designs from track roller profiles.
Using same cam in a 573 now
Tried Comp Cams same specs, made more boost but less power so numbers don't always tell the whole story.
555ci JC Performance/Smith Power
Brodix 2x heads
Roots blown
6lbs boost
262/272
112 LSA
109 ICL
708/708
Crane solid roller cam, lobe designs from track roller profiles.
Using same cam in a 573 now
Tried Comp Cams same specs, made more boost but less power so numbers don't always tell the whole story.
262/274 , 113 LSA , .724/.725 lift , thats figuring .016 lash.
Seems like whomever picked that cam, may have known a thing or two. Bet it made pretty good power too. I did use the BB2X flow data, with CNC ported chambers. Not sure if you have that, or any chamber work, either way, fun stuff.
Last edited by MILD THUNDER; 10-05-2016 at 10:53 PM.
10-06-2016 | 08:10 AM
#27
Gold Member
Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
First one was mine 630 hp and 638 tq in marine trim
Here's some "custom" cams for oso members that have been specd for their combos.
540ci
AFR 325 heads
9.6:1
1050 CFM carb
Single Plane
241/246 duration
112 LSA
109 ICL
681/663
540ci
GM Rectangle Iron heads
9:1
800 CFM carb
Single plane
239/246
113 LSA
108 ICL
646/639
540ci
AFR 325 heads
9.8:1
1000CFM carb
single plane
242/247
112 LSA
108 ICL
664/656
540ci
AFR 325 heads
9.6:1
1050 CFM carb
Single Plane
241/246 duration
112 LSA
109 ICL
681/663
540ci
GM Rectangle Iron heads
9:1
800 CFM carb
Single plane
239/246
113 LSA
108 ICL
646/639
540ci
AFR 325 heads
9.8:1
1000CFM carb
single plane
242/247
112 LSA
108 ICL
664/656
10-06-2016 | 11:14 AM
#30
Registered
Joined: Feb 2005
Posts: 570
Likes: 47
From: cincinnati,oh.
I have almost the same setup as you do. 540 -315 AFR heads. The cam is 246*-250* at .050 >663-.654 lift. 112 lc. Can you post what you replaced that MK cam with and what the result it made? I am going to rebuild and might make a change.
