Putting a Y8 block/head in the CRX today and running the manual switch for VTEC because I'm using the A6 intake and ECU. I may switch to the Y8 mani later but need the car running asap and cannot wait on the harnesses. I understand that my ECU will not send the extra fuel when VTEC engages so I'm wondering if it is possible to schedule extra fuel with an SAFC II I have laying around. I know I can add fuel with it but do you know if I can only add it after the VTEC crossover point so i'm not running rich under normal driving RPM's?

 

Hope to have the Y8 motor running tonight so help is much appreciated so I can utilize VTEC safely. Not a big fan of using a fuel pressure regulator to handle this because it will be rich all the time unless I turn it up and down constantly. Correct me if i'm wrong.

 

The y8 intake manifold is actually the best flowing manifold for the d-series (as far as I can remember, it's been awhile since i've been in the d-series game).

I would probably not worry about setting up vtec on a switch, and just wait until you can get all of your harnesses in. If the car needs to be running ASAP, then go ahead and order your harnesses and just limp the car around until you have the correct things. A complete intake manifold swap would only take an hour or two.

The safc could do what you wanted it to by adding fuel, but i'd highly recommend dyno time and a tuner doing that for you. It gets really complicated when you get into adding fuel at certain rpms, etc. Which at that point, you would have been better off just doing it right the first time.

I wish you could have gotten a hold of that vafc that I had, that would have helped a tad more, but still would have needed a tuner.

Like I said, since you'll be runni the stock a6 ecu, just drive the car and get 35-40mpg and enjoy that until your other parts come in.

 

yeah thats what i'm gonna do. i will start getting the stuff together for the Y8 mani and ultimately all the go-fast goodies for the A6 build.