Be very careful trying to lube the lobes in block. Cam lube in the lifter bores can keep the lifters from rotating during break-in and wipe a lobe.
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| Cam Degree Success ( finally) https://slantsix.org/forum/viewtopic.php?t=48161 |
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| Author: | DadTruck [ Sun Mar 11, 2012 1:23 pm ] |
| Post subject: | Cam Degree Success ( finally) |
Today's project included degreeing the cam on the 83 motor, messed with it for about an hour, absolutely nothing was making sense, then i figured out the #1 lifter was an exhaust, not an intake.. big dummy me! once that was resolved, for cam degreeing this article is about as good as anything else on the internet http://www.slantsix.org/forum/viewtopic ... degree+cam thanks Kielbasa. Josh and CNC-Dude,, your questions - answers was much help in filling in the blanks. For the cam for the 83 D-150,, Oregon1333/1527 regrind over the stock cam. per the Oregon Cam Card it is a 105 LSA, 105 Intake CL and 105 Ex Cl I installed it using a 2 degree nickel colored Mopar bushing,so my installed numbers are:105 LSA, 103.5 Intake CL and 106 Ex Cl my event numbers are at .050 IVO 3 BTDC IVC 31 ABDC EVO 29 BBDC EVC 3 BTDC per Oregon, the way they ground it... at .050 IVO 1 BTDC IVC 31 ABDC EVO 28 BBDC EVC -2 ATDC that is close enough for rock and roll,, however also checked the cam lift with a dial indicator.. actual intake lift , .299 x 1.5 = .448, Oregon stated .477 on the Cam Card actual exhaust lift , .284 x 1.5 = .426, Oregon stated .432 on the Cam Card minus 6 % on the intake minus 1.5 % on the exhaust I'll be talking to Oregon Cam on the Intake lift numbers,, above 5% error is more than I expect to see..this is base circle - peak,, we should be able to measure within better than .030.... Regards DT |
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| Author: | kielbasa [ Sun Mar 11, 2012 7:54 pm ] |
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your welcome, that was a fun night trying to get everything setup hahaha... on my motor i ended up with like 2.5 degrees advanced? no shim needed for the lift numbers, did you do your measuring dry? the oil/moly grease can add quite a bit extra lift with no spring pressure |
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| Author: | CNC-Dude [ Sun Mar 11, 2012 8:29 pm ] |
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Your welcome Dad, glad to have been a help. |
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| Author: | akbmotorsports [ Mon Mar 12, 2012 1:31 pm ] |
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nice work young man!!! |
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| Author: | DadTruck [ Mon Mar 12, 2012 2:42 pm ] |
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Kielbasa,, I had a film of light oil on the #1 cly cam lobes, I did have assembly lube on the cam bearings,,, I should have put the cam lube on all of the other lobes..but didn't So now it is either, trying to reach in with a long handle brush or pulling the cam back out to grease it up and re time it,,,,, I believe I am up for the long handle brush method... |
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| Author: | DadTruck [ Tue Mar 13, 2012 6:07 pm ] |
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the question of the intake lift that Oregon ground into the cam is resolved. on the Cam Card Oregon wrote intake lift of .477 with 1.5 ratio,, that is a typo. What they should have put on the card is .447 with 1.5 ratio,,, that calculates back to a lob lift of .298,, I checked the lift at .299 its all good! although I am thinking of installing the 4 degree bushing to advance the intake center closer to 100,, would never be easier than now,,, |
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| Author: | slantzilla [ Tue Mar 13, 2012 6:23 pm ] |
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Be very careful trying to lube the lobes in block. Cam lube in the lifter bores can keep the lifters from rotating during break-in and wipe a lobe.
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| Author: | DadTruck [ Tue Mar 13, 2012 6:30 pm ] |
| Post subject: | |
Quote: Cam lube in the lifter bores can keep the lifters from rotating during break-in and wipe a lobe
so what is recommended?to lube all the lobes but #1 cly, then degree the cam, then carefully lube the #1 lob or pull the cam after degreeing and just be careful to get it back in the same place |
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| Author: | kielbasa [ Tue Mar 13, 2012 6:58 pm ] |
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what i do on any motor i build, is use moly grease/lube, or basicly ARP bolt lube. a little arp packet will do a slant 6 cam. i cake the moly on all the lobes thick, then for cam bearing and lifters, i use the moly lube, then oil on top of that. the mixture of moly and oil, is VERY slippery works great |
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| Author: | slantzilla [ Tue Mar 13, 2012 7:53 pm ] |
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John, is the pan on? You should be able to go through the bottom and keep away from the lifter bores. |
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| Author: | DadTruck [ Wed Mar 14, 2012 6:24 am ] |
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thanks, yes I plan to use moly cam lube and the pan is off.. |
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| Author: | slantzilla [ Wed Mar 14, 2012 3:48 pm ] |
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Piece of cake. 
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| Author: | DadTruck [ Thu Mar 15, 2012 4:10 pm ] |
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ok,, figured this cam degree proposition will never be easier to optimize than now... so took out the 2 degree nickel colored bushing and put in the 4 degree copper colored bushing, got the following 105 LSA, 100.5 Intake Centerline at .050 IVO 6 BTDC IVC 27 ABDC EVO 32 BBDC EVC 5 BTDC during various searches,,,kept seeing that 100 to 102 is a good Intake Centerline Angle for torque and slants.. From the RB dynamic compression calculator the change from a 104 to a 100 ICA changes the dynamic compression from 8.14 to 8.19,, we shall see
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