| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
01-04-2021, 02:13 PM
|
|||
|
|||
cam timing off 4 degrees curious what others are seeing.
Building a 461 eagle forged crank, JP performance 9 keyway billet timing set and Howards hydraulic roller. 4 degrees retarded when on 0 marks. Ive used this set up before but never a howards cam they usually are within 1 degree. Just wondering what others are seeing. I advanced it 4 degrees and it came right in to spec. I know this is why we degree in the cam this is just the most out of spec I have seen one and ive done 8-10 engines in the last 2 years.
|
|
#2
01-04-2021, 02:54 PM
|
|||
|
|||
|
If you trust your tools, set-up and measurements, I think you just have 4 degrees of stacked-up tolerances. It's certainly possible. If each component was off 1 degree you would be off 4 degrees when assembled. Crank, cam, cam sprocket, crank sprocket. I had a pile of parts brought in years ago with a "Wolverine" timing set. Put it all together and checked it. Off 17 degrees!! Couldn't believe it. Re-checked several times came back the same. Replaced the timing set with some old Cloyes stuff I had laying around and it was within 2-3 degrees. So that was most of it. It happens.
|
|
#3
01-04-2021, 04:55 PM
|
||||
|
||||
|
I've had custom grinds from both Bullet and Comp that have been "off" a few degrees. So, I degree EVERY cam I install.
__________________
'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust My webpage http://lnlpd.com/home |
|
#4
01-04-2021, 06:40 PM
|
||||
|
||||
|
Last engine I built a few weeks ago was off 6 degrees
__________________
62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
|
#5
01-04-2021, 07:03 PM
|
||||
|
||||
|
8 degrees for one of my Comp rollers.
__________________
Jack Ferris RestoRacing LLC www.restoracing.com Sandy, UT --------------------------------------------------- |
|
#6
01-04-2021, 10:55 PM
|
||||
|
||||
|
Damn!!! I just slid in a comp roller from butler on Saturday. I have a degree wheel and was going to do degree a cam for the first time. The wife wanted me for something and I got sidetracked, then I spoke to my buddy later that night and he said screw degreeing it they are right. Now I am definitely going to do it. I advanced it 4 degrees like comp wants for a 108* centerline. Jeez...any quick tips?
__________________
" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
|
#7
01-10-2021, 08:26 PM
|
||||
|
||||
|
I degreed it today. It was dead on!!
__________________
" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
| The Following User Says Thank You to 4dblnkldude For This Useful Post: | ||
| Reply |
| Thread Tools | |
| Display Modes | |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
