Hello to all

I am going to install the 2.5L engine on my car the next 10 days, before tune it with a AEM EMS ( tuner should come from UK or US) in a dyno, I want breaking in the engine before.

Can i drive it with the stock ECU and injectors during the break in? I was thinking in not passing the 4000 rpm line.

I also have installed: Amuse Exahsut with test pipe, j

 

You should be fine breaking it in on the stock PCM. You still have your PLX wideband installed? I'd make sure it's not dangerously lean, and listen for spark knock.

 

stock pcm should be fine as long as you don't engage vtec. btw good luck with your setup

 

Yes I have it installed. I will keep an eye on it.


Knowing in a NA engine is not as danderly as on FI engine right?


Juan



BTW good memory

 

Thx!!!

 

It's bad no matter what kind of engine. Any modified engine will have different fuel requirements than stock. A stroker NA 2.5 won't have the drastic changes in fueling as a SC'd or turbo'd car.

 

My guess is that you will be ~25% lean everywhere in the RPM range. The computer will compensate based on the MAP and oxygen sensors... but it won't be able to correct all the way just based on those two sensors.

It's up to you if you want to run it like that. I would never do it, but hey it's your car.

If you have the money to do such drastic engine modifications, why are you skimping on the engine management?

 

For short term use, you could add an inexpensive adjustable fuel pressure regulator. Bumping the pressure up by about 15-20 psi (static) would solve most of your fuel issues with the stock ECU.

UL

 

Thx UL



Bane please read my post again...

 

Woops, my apologies. I keep seeing people spend lots of money on their motors but then skimp on one of the most important areas! Glad you aren't one of them

I think the adjustible fuel pressure regulator is a good idea as well... you can use it to help tune with the AEM unit in the future for more power and a smoother curve!