Cam Centerline

[Heo]

I was degreing the cam. Its a compcam 282 s with 106 deg.center line
( I ordered a 294  ) The closest i get is 110 either the cam or timing
gear is wrong. I suspect the timinggear, Is it worth trying a new camdrive
or can i run it like that with 4 deg retard? 390+060  10:1 cr

[Royce]

Most Comp cams come ground with a 110 degree lobe separation angle..If you have a non adjustable timing set and your intake center line is 110, then the cam is installed straight up, neither advance or retarded.. The cam card may recommend the cam be installed on a 106 intake centerline.. This is 4 degrees advanced, so you would need an adjustable timing set to set the cam at 106.

[Heo]

Yes i have an adjustabel timing set 4deg adv - 0 - 4deg ret
and closest i get is 110 CL (118-114-110) jumping one toth
should give me 15 deg so 103 deg closest there

[rockhouse66]

I would get another timing gear set - now is the time.  I have had good luck with the Ford Racing set.

[ScotiaFE]

I thought the 282 had 4* adv ground into it so at
straight up it is adv 4*?

[blykins]

Another vote for a different timing set, so you can put it where you want it.  I'd have to know the rest of the combination, but I don't run a lot of cams straight up.  You gain a nice amount of throttle response and low-end response from advanced cam timing. 

Howie, you are correct....it's got 4° of advance built into it. 

Straight up actually means that the intake centerline is equal to the LSA, but most guys use it to refer to how the timing gears line up "dot to dot".

[Heo]

Dot to dot i got 114 CL  then i can go 118 or 110 comp
recommends 106 Cl.  Adv, Ret whatever .....
Anyway i ordered a Ford Racing set  now that have 4Deg at cam
8Deg at Crank ADV or RET so that must be enough
.....this damned engine keeps fighting me

Brent the combination is a 390 +060 speedpro flat tops
ported C4 G heads zero decked 0.040 headgasket 10.1
compratio Streetmaster intake Holley 780 vacuum

[ScotiaFE]

Ok I meant dot to dot.
So you have to add the 4*, but it does not say that on the card I think.
I have 282 card somewhere I'll have to go read the card again.

[Heo]

Per instructions that was with the cam. You put it on 106 centerline
and the closest i get is 110 and that's when using the key slot marked
4 ADV.   Dot to dot i get CL 114 and on the 4 RET keyslot i get 118
So
I tried degree it the oldway that i always used before. When intake opens
(0.015) 35  and its of there to

So what i actually wanted to know was how it will run with the 110 CL
I wanted to eventually save some time , But now i ordered a new timing set
so i guess i wait for that another couple of weeks if I'm lucky and then the
summer is over. I'm not supriced
if its 4 or 6 weeks before i get it....No way it
will run this summer anyway

[blykins]

If it were mine, I'd stick it on a 106 for sure and depending on how good of pump gas you have there, what it's going in, rearend gears, etc., I'd probably even go further and stick it on a 104. 

[Royce]

It will run fine on 110 for the summer.. Hopefully the timing set will cure the problem, but it would not be unheard of for the cam to be ground incorrectly..

If you want to advance it, move the chain on the gear 1 link.That gives you 15 degrees advance or a 95 ICL.  Then put the crank gear in the 4 degrees retarded slot, which should net you 103 ICL . If you do not run into intake valve to piston clearance issues it should run fine there.  You might even like it better than a 106 ICL depending on the rest of the combo.

[Heo]

We got 98 at the pump Its going in a 64 Galaxie
With a C-O-M With a 2000+ converter or a T10
Rear gear is optional from 2.82 3.00 3.50 3.73

Yes Royce i tried that and came up with 103

So you guys think it runs better on 103...?

[My427stang]

Well, if you would have been happy with a 294S, I would expect a 282S on 110 would have very similar low end torque but not have the same high end charge. 

However, I have never seen a Comp Cam with any timing set come in that far off, I would recheck to be sure, if you are using the centerline method, switch to check opening and closing events, if you are going by valve events, go with the centerline method

Also be very sure that you have TDC exactly right. 

The reason I am concerned is if you made a mistake and the cam is actually correct, it'll be at 102 instead of 106 and although that generally does OK, it does get the intake valves very close

[Heo]

I checked and re checked both TDC and CL cecked so i had the
indicator square to piston and lifter had a coffe. Then tried   the
opening closing event. Off there to

[Royce]

Advancing the cam serves 2 purposes.  It compensates for chain stretch and it is a tuning aid to move the torque peak around..Advancing closes the intake valve sooner making more low end torque.. Engines are usually happier with some advance in the cam.. hence the recommendation on the cam card... I doubt you will be able to tell the difference seat of the pants between 103 and 106. In the intensest of getting the car on the road and enjoying it I would either set it at 110 or 103 using the parts you have.  See how you like it and if it bugs you change it over the winter..