Fuel injection? Open or Closed loop?

[Sean Marconette]

Originally Posted by Darrel Goheen

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.

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

[Alan Roehrich]

Longest lasting I've ever seen were the sensors that came with the NGK PowerDex kit. Things were tough enough to go about two years, on C-12, maybe 350-400 passes. Lasted until a huge wheelstand got them and the collectors they were in.

[Ed Wright]

Since I got my Stahl headers, that isn't near the problem. They are tucked up closer to the floor than the Hedman Hustlers. Oil pan will hit before anything else now. They should all be built like Stahl stuff. I could not find 1 7/8" headers from anybody but Hedman before Stahl. I tried to order a set from Jere originally, but he had no jigs for the 4th gen F body until Woodro took his up there. Jere told me "Just bring the car, we will build them on the car." Just a short jog from Tulsa, OK, to York, PA. Shorter tow for Woodro. Thanks Woodie! LOL

[cmracing]

I get about 200 or so passes on an NTK sensor using unleaded race fuel, sometimes more. This is with the Holley system. The Bosch sensor is about half that. If you limit your correction to +-5% or less, then if a sensor does go south, it won't kill the tune that bad. But, you do have to look at your datalogs and keep an eye on things....... I run Closed Loop in both of my cars, but also limit what I allow it to do.

[Ed Wright]

I agree. I would never allow it to make more than 5% correction. NTK sensors are great.

[Darrel Goheen]

Thanks for the info.!

[Sean Marconette]

Thanks as well for the information.

Ed are you planning on racing at the Topeka National open in May?

Sean

[Darrel Goheen]

Originally Posted by cmracing

I get about 200 or so passes on an NTK sensor using unleaded race fuel, sometimes more. This is with the Holley system. The Bosch sensor is about half that. If you limit your correction to +-5% or less, then if a sensor does go south, it won't kill the tune that bad. But, you do have to look at your datalogs and keep an eye on things....... I run Closed Loop in both of my cars, but also limit what I allow it to do.

I'm curious.....how often do you look at your data logs once you have it tuned? I'm still new so looking at most of the data logs but now they all are looking the same. Thanks.

[SS3718]

Darrel,
I log every run and generally look at the graph after every run. I run a FAST system in open loop and like being able to review the data after each run!

Nick

[Darrel Goheen]

Originally Posted by SS3718

Darrel,
I log every run and generally look at the graph after every run. I run a FAST system in open loop and like being able to review the data after each run!

Nick

That's what I've been doing except when I'm lucky enough not to have time between runs to look at them