I would like to see the specs on this. Specifically, what is the .050" duration? I believe that the advertised is rated at 310, 320, with something like .514" lift. Anyone have this info?
Hi Steve, I believe you are referring to the KB-3HB and the spec's are... Advertised Cam Data Intake Exhaust Valve Lift w/1.55 ratio rockers .525" .525" w/1.60 ratio rockers .542" .542" w/1.65 ratio rockers .559" .559" w/1.70 ratio rockers .576" .576" Duration 320* 320* Open 59* 91* Close 81* 49* Lobe Center 106* Cam Degreeing Data (at .050 Lifter Rise) Intake Exhaust Cam Lift .339" .339" Duration 252* 252* Open 25* 57* Close 47* 15* Cam Advance of... 5* Intake Centerline 101* * .050" Intake Opening 25* Exhaust Centerline 111* Overlap 40* Charlie Evans Camshaft Guide for BBB's can be seen here... http://chicagolandbuick.org/partners/Charlie Evans cam tables.htm Hope this helps....:3gears:
Kerry, Thanks, but I think that is something different. These are the specs from Jeff Kroeger's post: Kenne-Bell NOS Mark 3....lift & duration.... IN. .510" - EX. .518" - IN. 310 - EX. 320 Lobe centers 110 degrees. Still looking for the .050" duration. I don't know how old this cam is, but it might be pretty old. I noticed in Jeff's post that he has the specs, so I guess I'll just ask him (didn't notice that before).
KB Mark 3 Here ya go Steve, I ran this cam for about 15 years in my '70 350 Skylark road race/autocross car with great success. I still have the original cam card. Degrees of duration @.050 is 240 intake, 248 exhaust @ advertized 310-320 lift at cam .324 .327 inches 105 degrees centerline I installed it at 100 degrees intake centerline and used Rhoades lifters since it was purely a race motor and I wanted the increased torque and didn't mind the noise.
Thanks, Paul. it turns out that I don't need the info anymore. I was going to buy an engine with this cam, but it turns out now that I'm building a stage 2 motor, so everything is different.
