Quote:
Originally Posted by Crunk81us
Hi All,
Yes I am new here (been lurking for a while) Its a great site! 
I have searched my ass off and cannot find any concrete data.
My main question is does anybody know the differences in cams from the 2012, 2014, 2015 engine updates and part number changes?? ie lift/duration.
Part numbers
2012 su0030018x
2014 su0030474x
2015 su0030623x
the second part of my question relates to fuel pressure on the direct injection.
Will raising the fuel pressure prior to it entering the direct injection pump raise the output pressure of the direct injectors? |
I believe their were some changes to the rocker design and the vavle length and you need to be carefull you match parts. Not aware of any changes to actual cam lobe lift ect, but its possible.
However the vvt cam tables in tunes for all the revisions are almost identical.
If you alter the fuel pressure into the DI injectors then you will alter the fuel delivery. Some E85 tunes do that to increase they fuel delivery by 30% for e85 fuel tunes, the up the DI pressure multiplier in tune tables to up the DI fuel delivery. and the injector scalar for port injection is reduced by 30% to fool the ecu to deliver more fuel?