Re: Fuel injection? Open or Closed loop?
 

Thanks Ed, I think I know enough now to be dangerous.


Jimmy

Re: Fuel injection? Open or Closed loop?
 

Who's ECU are you using?

Re: Fuel injection? Open or Closed loop?
 

Ed, it's a FAST XL1. Matt Maxwell with FAST did some upgrades on it this past weekend in Atlanta.


Jimmy

Re: Fuel injection? Open or Closed loop?
 

Great system. you should be good.

Re: Fuel injection? Open or Closed loop?
 

Sounds like you should be a lot more consistent in open loop. So do you do a couple of TT's or qualifying runs in closed loop for learning and then go to open loop for elims. to get the consistency?

Re: Fuel injection? Open or Closed loop?
 

That was 2012, learned what I was doing wrong. I've run it both ways now. If you have it tuned correctly, it makes almost no corrections in closed loop anyway. Makes no difference I can see now.

Re: Fuel injection? Open or Closed loop?
 

So do you normally run closed loop now? I know it's an old thread. I was just going through old posts trying to learn. Thanks.

Re: Fuel injection? Open or Closed loop?
 

Closed Loop. O2 sensors don't live long with leaded fuel. I replace mine at the start of each season. Runs the same both ways. Once the tuning is right, it makes no difference. Hit some strange weather conditions, may help.

Re: Fuel injection? Open or Closed loop?
 

I did buy an extra Bosch sensor. Do you use Bosch sensors or NTK. Maybe NTK isn't an option with FAST. Holley offers a NTK for double the price but is suppose to last longer with leaded fuel.

Re: Fuel injection? Open or Closed loop?
 

My Holley Bosch sensor lasted thru 2 dyno sessions and driving the car in and out of the shop then the car fell on its face while testing. The logs showed strange readings and I already had a NTK with me at the track. I switched to the NTK and it was back to normal. This is with C-16. I was wondering about how often the NTK should be replaced as well.

Sean