i Valve Springs in my Eta head?

[nefarious7907]

As I have brought up on E30tech before Mark D has a custom chip for 027 ECU's that have the "i" valvetrain conversion. So that the chip for the 027 ecu is more like the 325i chip, with a 6600rpm redline.

The benefit of a $220 chip is that if you have spent $$$ and time getting your eta to run correctly and smoothly you will not have to change all of your sensors and deal with the mess than changing harness and sensors can be. You just install a chip.

I will buy just an 'i' cam my eta when I go FI this spring,

[mikegar]

Glad you reminded me about this thread, EtaSport, I'd forgotten all about it.

Just a little update, I've got the 325i throttle body and 325i exhaust, but I'm still debating on whether or not to enlarge the TB opening of my eta manifold, or just to go ahead and get a 325i manifold. I'm also planning on buying a set of IE Shorty headers soon, those will go on the 325i exhaust along with my Magnaflow.

wouldnt the i throttle body on e intake yeild more velocity than the i intake manifold with i throttle body? especially since the e intake has longer runners.

[EtaSport]

wouldnt the i throttle body on e intake yeild more velocity than the i intake manifold with i throttle body? especially since the e intake has longer runners.

This is something I ran into with the last head I put together. The head was basically port matched to the i intake and stayed so til about halfway down the chamber. Had great low end torque but the large volume of air caused reduced velocity up top, throw small valves into the mix and the engine ran out of pull above 5500. The i intake will make power but you cant go overboard on the head ports. My original head still had pull over 6k.

[SpecM]

holy ancient thread batman!