Dual valve springs in eta head?

[e30onBBSs]

Would putting in dual valve springs + an i cam (assuming they are the same size journal) and swapping over just the i harness and sensors work for a higher rpm?

Or just dual valve springs + harness swap? Could the eta injectors keep up with the b25 redline?

Just some thoughts because looking back on the head swap, I just did it for higher redline when I had that car, and if it only cost some valve springs and the harness and a cps pulley that would be fresh for most people who don't like their eta because it redlines at 4500

[TobyB]

Well, you'd need to drill the oilways for the 2 extra journals,
and then it'd spin ok.

But the eta ports are pretty tiny- you might be able to get it to SPIN to 6500,
but the tractor semi that's pushing you down the road to get it to go that fast might not be
going to where you want to go.

t

[jeffnhiscars]

Eta injectors also have different impedance and won't work with a motronic upgrade. Th good news is that you can buy good used b25 injectors for next to nothing