Purple cam question

[rd92west]

This question is in regard to
P4452783 purple cam
I'm my 2002 direct connection catalog it tells me that this cam has a centerline of 115
I installed this same cam last week.
On the Mopar Performance Camshaft installation sheet (dated 03/21/11) it tells me that this cam has a centerline of 113
I degree'd this cam and it was bang on 113.
My crank sprocket has 3 key way grooves. 4 degrees advance, 4 degrees retard and stock. I installed it in stock position.
I have been told that advancing the cam by 2 degrees gives a nice power increase at low rpm at the cost of some top end rpm's and a little fuel economy.
My question is- which centerline number is accurate? 115 or 113

 

[Mr C]

I'd say 113 since you degreed the cam and that's what it turned out to be.

 

[rd92west]

I'd say 113 since you degreed the cam and that's what it turned out to be.

I would tend to agree.
I do find it strange that the 2002 direct connection book says 115. Missprint???
In 2002 book the magnum cam and 6 pack cam are both 115 centerline.

In 2011 install sheet the magnum is 113 and six pack cam is 115 yet these 2 cams are virtually identical except for the magnum cam uses 1 bolt cam sprocket and 6 pack uses the 3 bolt cam sprocket

 

[mr gtx]

the cam is on a 115 LSA with a 2 degree built in advance that would give it a 113 centerline, seems like it degree in perfect then.

 

[rd92west]

the cam is on a 115 LSA with a 2 degree built in advance that would give it a 113 centerline, seems like it degree in perfect then.

Thanks. I figured that there was a explanation.

 

[rd92west]

the cam is on a 115 LSA with a 2 degree built in advance that would give it a 113 centerline, seems like it degree in perfect then.

So does the 6 pack cam have 2 degrees advance built in to it?

 

[mr gtx]

So does the 6 pack cam have 2 degrees advance built in to it?

some one measured the 6 pack with 3 degree advance. but the 440 hp none 6 pack events are intake opens 21* closes 67*. ex opens 79* closes 25*. so it is for sure 115 LSA and 113 centerline.

 

[CBODY67]

Seems like I recall the orig 440 +6 cam had the same timing events as the 440HP cam, but with a different taper on the lobes to better handle the higher valve spring pressures? Plus the 3-bolt sproket rather than the normal 1-bolt sproket? Per the old DC Race Manual.

 

[mr gtx]

Seems like I recall the orig 440 +6 cam had the same timing events as the 440HP cam, but with a different taper on the lobes to better handle the higher valve spring pressures? Plus the 3-bolt sproket rather than the normal 1-bolt sproket? Per the old DC Race Manual.

don't forget they had different lifters to match the lobes, called mushroom lifters

 

[CBODY67]

Yes, "low taper" lifters to match the taper on the cam lobes. "Mushroom lifters" are what the Y-Block Fords used, such that the lifters are larger diameter on the lobe-contact surface than the base diameter of the lifter body. Which allegedly results in a valve lift curve similar to a roller cam, from what I've read. They have to be installed before the cam is installed, from what I recall reading back then. Obviously, they do not drop-in from the top side as a normal lifter does. BTAIM

Happy Holidays,
CBODY67