whipplem104

I was wondering if anyone has the IDC of the 550cc injectors? I have looked and found the info on the stock injectors and was wondering what they are on the 550s. Just the pulse width would be fine as I can do the rest. Any mods that require them would be fine.

GT-ER

Here is my car with 550's and running VERY rich.



78% max with a low 10's A/F ratio. I'll be lower once I get a better tune.

whipplem104

Thanks,
Exactly what I was looking for.
Any data above 6,000?

Robert AMG

iTrader: (1)

Sorry but does anyone know the PID for IDC in the torque app? and timing retard also?

GT-ER

Unfortunately I had to stop but based on my calculations I should see about 84% by 6500. Again, once I lean my car out it should run a good 5-8% lower.

kipper215

Can you share what injectors you decided to go with and where you picked them up from. I am trying to determine what is the best brand to go with.

Thanks.

GT-ER

eurocharged

kipper215

Thanks

stevebez

why does injector time decline as rpm rises?

GT-ER

because the car s running richer in the lower rpms than it is up on top.

streetspeeder

AFAIK...As RPM goes up the time for a revolution goes down...so 6000rpm/ 60000 milliseconds = .1 rev/ms = 100ms/rev

if those units are in milliseconds then @ 6000 rpm the injector is on for approx 15ms out of 100ms. and as rpm goes up

GT-ER

You are correct if you are talking avout the time the injector is closed. The time the injector is open however stays the same if the amount of air in the chamber is the same and the af ratio is the same, regardless of rpm. For duty cycle however, the rpm is taken into consideration because it takes into consideration injector on AND off time.

streetspeeder

Whoops ...ok...it works out to only 20ms for the injector to spray of which approx 15ms is the time he is spraying fuel with an off time of 4-5 ms. so the injectors are at 75%+ duty cycle @6000 RPM?

GT-ER

yes, correct.

e55amgrocket

I know with the injectors I have (550cc ev14) I made 619hp on dyno jet and still
Had plenty of room left. We had a bad wideband on the dyno when Kerry tuned it and we're able to peg the new meter at 9.0 with more fuel left before taking 20% back out.

AMG E Power

Yeah... Still waiting on that DIY thread from you on how to install the injectors u sold everyone