ls1 1.9 rockers with small cam

[PWR346]

hey guys,

ive already asked mace but they haven't gotten around to it yet but,
i need to know if the mace 1.9 ratio rockers will work with comp cams xr273hr and a set of pac racing 1219's.
The cam is only small lift, and have calculated max lift to be .59/.594 with 1.9 rockers, and the pacs are rated for .625
Im not sure if other problems such as coil bind, or bad geometry will be a problem. Any help would be great.

Cam details here - 54-416-11 - XFI RPM Hydraulic Roller Camshafts

 

[Deuce]

is .625
a) the max recommended lift for those springs,
or b) is that the coil bind height?

if A then :thumbsup:
if B then

apart from that, every thing you are saying sounds alright. I don't know about LS1 geometry though.
from your link, my calc comes up with .595/.5985 valve lift. how did you get yours? (lobe lift X rocker ratio)

 

[PWR346]

That would be A- max lift.

I just calculated in on Rocker Arm Lift Change with Ratio Variations , thought it might be somewhat correct. I checked it again and it came up with .597. But its still under .600, im assuming that would be good. i'm just wondering if doing more work on the rocker is going to have an adverse affect else where. If it works out should be a good little combo.