Quote:
Originally Posted by Octave236
Hope reading doesn't own me. But I tried to find an answer to my question and didn't see any solid statements that it WILL work. I'm wanting to keep my DET intake manifold and head. Can I swap over Cams and roller rockers over to my Highport head or do i need to swap everything like springs and valves. I'd like to keep the springs and valves cause there stiffer and it's less work. But I'll do what I have to in the end just don't want to redo my intake pipe and rewire my harness in my NX. Anybody got dyno numbers on RR valvetrain and bottom end with DET pistons. Looking to see the power curve.
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It should fit, because the heads are essentially the same, but the valve lengths are different by 3mm from what I remember. I think the RR valves are shorter so the entire (valve train) swap will be needed. The conventional has a 40 mm install height and the RR has a 37mm.
What I'm wondering is... if the springs have the same diameter profile. If that were the case, even if they had the same spring force - your highport springs may have some preload if you use them instead of the RR springs. That would be sweet if that were a hidden upgrade. There are more harmonics in it than I understand. In other words, safe bet replace everything including the adjusters... or pioneer and rock the conventional springs.
But for the record... I think that the majority of the difference in power probably lies more from the bump in compression from the combustion chamber difference rather than the efficient valve train... That's an assumption though... it would be interesting to see what the actual difference is.
You'll never know until you try though.
So if you do post up.
