I am thinking of going with a 847 Cam.
Instead of using 1.6 RR's and using 1.5 Rocker Arms for emmisions testing do you think this will help me pass the test?

 

The insane duration will pretty much kill any chances you might have of passing, regardless of the amount of lift. You can try tuning it to pass...but I very highly doubt that too.

 

not really. don't get me wrong, it should help a little bit, but not nearly enough IMO. A large cam will make you fail hydrocarbons due to the overlap. The amount of lift does not change the duration of the cam. Yes there will be slightly less valve lift at .050 tappet lift, but your talking .075 valve lift versus .08 vavle lift. Its the timing of the events that is the problem, not the lift.

If you want to pass with that cam you will have to get creative, like a special tune and extra cats if you can get them hot enough to light off(be effective).

-brent

 

Not to rain on your parrade, but if you have to pass emissions you really need to pick a way smaller cam. You don't have a snowballs chance in hell of getting that cam through emissions.

If you want more power, try nitrous.

 

from what i've read on here alt jar has passed emissions running that cam without a problem

 

i thaught emissions were different evrywhere you go
i know california and MASS have the same standards for emissions i figured everyone elses was a little mre leanient. saying that maybe the one with the cam was in a very leanient place