Nissan Primera

Cooke · Post by **Cooke** » Thu Apr 06, 2006 2:43 am

I am looking at all different types of ECU for my car but i need to clear a few things up first.

1. Is the MegaSquirt2 a stand alone ECU (i can throw my Nissan ECU away) of simply a piggy back unit?

2. I would like to be able to adjust the advance and retard on the ignition (possibly have two tunes - one with and one without nitrous).

3. The Dizzy is a lucas unit, would this cause any problems?

barf · Post by **barf** » Thu Apr 06, 2006 9:24 pm

re 1 & 2. its a standalone/complete fuel injection and spark control unit.
to answer 3; almost any dizzy should work fine. where you might encounter difficulty is getting an RPM signal into the MS

is it an SR20DE engine?

Cooke · Post by **Cooke** » Sun Apr 09, 2006 4:37 am

yeah a UK spec SR20DE (with a RNN14/GTi-R head to be fitted).

Cooke · Post by **Cooke** » Sun Apr 09, 2006 6:20 am

Also, is there anyway i can use a MAF sensor rather than the MAP sensor?

Mike_Robert · Post by **Mike_Robert** » Sun Apr 09, 2006 7:05 am

There have been a couple of people using Ford MAFs for special projects where SD won't work due to no vac signal - JetSki/personal watercraft for one. The Extra code does support these. If you're thinking of using the Nissan unit, it's probably a no-go at this point. A lot of the non-Ford MAFs use PWM duty cycle or frequency as the flow signal and MS cannot decode these. Also hard to find on the non-Ford MAFs is info on their transfer functions. There is no reason you can't make speed-density work just fine.

-Mike

Cooke · Post by **Cooke** » Sun Apr 09, 2006 8:58 am

how hard is it to switch to a MAP sensor? Drill a hole in the inlet manifold, and stick a pipe in to the hole, and attach the other end of the pipe to sensor - bobs your uncle fannys you aunt?

nismoryco · Post by **nismoryco** » Sun Apr 09, 2006 9:13 am

Jim Wolf Technology in the US often uses Ford Cobra MAF sensors as an upgrade path to the standard Nissan unit. They might output very similar signals. And as far as speed density goes, you just need to run a vacuum hose to the Megasquirt unit.

Matt Cramer · Post by **Matt Cramer** » Sun Apr 09, 2006 11:44 am

Cooke wrote:how hard is it to switch to a MAP sensor? Drill a hole in the inlet manifold, and stick a pipe in to the hole, and attach the other end of the pipe to sensor - bobs your uncle fannys you aunt?

That's it. Although you probably have a hole you can use somewhere, and of course much of the "pipe" will be flexible tubing.