Factory efi

[Fireofficer5]

OP. The factory ECM is great for Stock class cars. All you need is a hand heild tuner or a lap top programer.

[Ed Wright]

Originally Posted by Fireofficer5

OP. The factory ECM is great for Stock class cars. All you need is a hand heild tuner or a lap top programer.

Many factory ECUs don’t run well at higher RPM. Most GM stuff won’t trigger the injectors well past 7000 RPM. Not sure how high you need to spin your Stocker.
1996/1999 Vortec trucks hit that just barely past 6000.

[Ed Wright]

Originally Posted by cmracing

You can do this with the Holley also. If you want to have multiple tunes inside the ECM to switch between you need the Dominator ECM. There is so much that can be done with the Holley that people just don't even know about.

You can switch “tunes” at shifts, going down the track?

[cmracing]

Originally Posted by Ed Wright

You can switch “tunes” at shifts, going down the track?

You can modify your timing and fuel going down the track for each gear.

It seems a lot of people have their own opinions on this website and they are the final authority on all matters.

If you are hell-bent on running small injectors at higher than normal fuel pressure, go ahead. You can still run a large injector at higher fuel pressure and limit the pulse width, but you must already know this.

I come on here to help people, but I see you have it all covered. Robin Lawrence and I should just go-away and let people like you help the rest.........

Enjoy.

[Ed Wright]

WOW! I have no idea who you are, but I apologize for offending you.