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

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

Your welcome Dad, glad to have been a help.

_________________
There's no such thing as too much cam....only not enough engine!

nice work young man!!!

_________________
84 D100 /6 long rod 225
86 D100 /6 my sons w/offy intake/weber carb
2016 buick regal turbo

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...

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,,,

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.

_________________
Official Cookie and Mater Tormentor.

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

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

John, is the pan on? You should be able to go through the bottom and keep away from the lifter bores.

_________________
Official Cookie and Mater Tormentor.

thanks,
yes I plan to use moly cam lube and the pan is off..

Piece of cake.

_________________
Official Cookie and Mater Tormentor.

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