break in guide

[justcruisin]

Can someone give me some advice on break in for my 440. Should I be installing a lighter spring or low ratio rockers? Edelbrock rpm heads with the stock springs, 1.5 rollers and a comp xe275hl cam, .525 lift. My intenstion is to use Brad Penn break in oil, torco assembly lube and the comp lube that came with the cam on the lobes and after break in run the Brad Penn 20w-50 grade 1 as this is available at my local store. I have been told not to go past 250lbs spring pressure at max lift for break in Thanks.

[justcruisin]

Just to clarify, the springs are the stock ones that came with the heads, not the stock Chrysler springs.

[flyinlow]

http://www.dodgecharger.com/forum/index.php/topic,81335.msg914046.html#msg914046

[flyinlow]

I  broke in my similar Lunati cam with Eddy heads using the Stock E head springs. No problems. However lighter springs would be safer. Maybe some old stock springs?

[Purple68]

I don't remember the specs of those springs but they're pretty heavy. I lost a lobe on break in with the XE285HL a couple years back. I took all the precautions except using lighter springs.

[Challenger340]

The stock EDDY Springs are around 125#-130# on the seat, and plus 320# over the nose of I remember correctly ?
A little HIGH for sure during cam break-in, making it kind of a crapshoot not to kill a lobe, if anything during the run-in doesn't go as planned ?

NOT that the Cam break-in can't go smoothly using good procedure, and plenty of Zinc in the Oil, it certainly might run-in just fine, just that alot of the "safety's" are gone ?
problem is,
The EDDY Springs are Singles with an Internal Damper, and removing the Damper does NADA to reduce much pressure for break-in, so you are pretty much stuck ?

This ain't gonna be popular ?
but IMO,
BEST procedure would be to find some lighter springs that you can run for Cam Break-in, then swap back to the EDDY springs afterward,

We redrilled the adjuster further out on some Crane golds years ago as "break-in" Rockers, worked fine on the old Iron Heads, then in later years ran into pushrod clearance problems on various Aluminum Heads, so back to Spring swaps.
I doubt you will find any "low-Ratio" Mopar BB Rockers out there for the above reason, but I haven't looked lately ?

[justcruisin]

Sounds like a spring swap is a good idea if not mandatory with the ed heads. I don't want to wipe the cam so I'll do the springs. I have the factory springs still on the old heads, I will pull them and do some checks, anyone know if they will be suitable? also what spring pressure should I be shooting for during break in?

[RECHRGD]

When I did my top end a few years back, I used the same cam with mopar 452 alum. heads (same as the eddy but with straight plug holes) and Crane gold 1.5 roller rockers.  Used Valvoline VR-1 20/50 along with the comp cam additive and lube.  No probems.   Bob