mindreaper

iTrader: (1)

I have a HSW wet plate kit + Timing Tuner that are soon going in my '99 Z28 (which is stock apart from a lid and a catback). I'll probably be using no more than a 100 shot (I have the stock fuel pump).

I have been told I need a wideband to check the air/fuel ratio before spraying. But I'm also looking into DynoTune's AFR Lean Shutdown Switch, which seems a much cheaper option than a wideband + gauge. I would connect it to one of my stock narrowband o2 sensors.

If I understand well, this shutdown switch will give me a relatively accurate AFR reading at wide open throttle. So I'll have to look at the AFR while I'm spraying. Then I can adjust the AFR by putting a bigger or smaller fuel jet, so that afterwards it reads a AFR of about 11.5 to 11.8. Do I understand everything right?

It's a much cheaper option than buying a PLX or LC-1 wideband plus a gauge. Plus it works as a shutdown switch if the AFR gets too lean, which is great.

Please let me know if you think this device is good enough to check my AFR for nitrous, or do you think I should also invest in a wideband, and use the shutdown switch as a gauge for the wideband?

Beer99C5

iTrader: (21)

The lean shutdown switch will be more effective/accurate when used with a wideband (vice the factory narrowband sensors).

SuperSlow02

iTrader: (16)

Narrowband is pointless..either rich or lean. But it will work off that. you jsut wont get a number. To my understanding the LC1 needs a laptop to work( I could be wrong but thats how my tuner explained it to me) the best route is a AEM Wideband. Which again from my understanding will work but the AF switch needs to be calibrated to work with the Wideband to give a correct readout on the screen....

Beer99C5

iTrader: (21)

A LC-1 is under $200 (without a gauge). You can program the LC-1 using a laptop, Basically you need to program the LC-1 for whatever device you plan on using.

In the case of an LC-1 you have two outputs, Lets say your gauge needs 10 AFR to equal .5 Volts and 20 AFR to equal 4.5 Volts. You use the LM-1 programmer (software for the LC-1/LM-1) and connect the laptop to the LC-1 (through a USB/Serial plug) and set it up as needed. You can program the other output for the Shutdown switch.

If you just want the safety of the wideband and shutdown switch, you do not need to run the gauge (but you can see what the AFR is with a laptop if you want for testing).

00cls1camaross

iTrader: (10)

there are only settings on the Dynotune A/F Lean Cutoff Switch to program it with LC-1s and PLX Widebands. If you buy another kind the LCS will read funky numbers since it can't interpret the algorithms.

DynotuneN2O

iTrader: (13)

I would go with the LC1 and the Dynotune a/f shutdown switch. All you need to do is wire it up! No need to even hook it up to the laptop as it will be ready to go right out of the box. No need for a wideband gauge as the a/f switch has one built in. Call us before you order as we can provide you a nice discount on the LC1.

Dean

SuperSlow02

iTrader: (16)

Now thats what im talkin about. Exactly the info I wanted.

ShiznityZ28

iTrader: (11)

My question is when are they going to make a wideband a/f rich shut down switch?

69_YENKO

iTrader: (16)

all that extra fuel makes torque!!

SuperSlow02

iTrader: (16)

little easier to lift under a rich condition then a lean.

ShiznityZ28

iTrader: (11)

Lean you will know somethings not right it will slow down. rich and you can hurt it way before you know its going wrong.....

Mike@HSW

iTrader: (6)

Our Edge controller we came out with years ago had both lean and rich a/f shut down.

DynotuneN2O

iTrader: (13)

No plan to add a rich shut down feature - running lean is where you will have the problems. Run lean and you can melt things! Run rich and the car will typically just bog.


Dean

Ray@Nitrous Outlet

and lift ring lands

we have a couple different nitrous controllers that offer rich and lean shut down.

I really like the NOS Launcher as it can monitor pressure sending units and up to 8 wideband controllers. It gives you data logging and upper and lower threshold cutoff for each parameter you are monitoring.

Beer99C5

iTrader: (21)

The Trick Performance V gauge has High low AFR (or Fuel Pressure if you use for as a Fuel Pressure gauge vice AFR), and High Low bottle pressure ranges to act as safety's. I was not going to use the bottle pressure one, but now that I have NANO @ 4500 PSI, I am gonna run the bottle pressure safety 500-1100 PSI. AFR wise 10-12.5.



Bad Pic, but you can figure it out



Hate to have the NANO regulator go bad and have a 1500-1600 PSI surge during a run.

Ray@Nitrous Outlet

if you have the nitrous pressure sending unit on the main feed line and not the bottle valve, it will shut the system down if you forget to open the bottle....not that any of us would ever do that

entewoh

iTrader: (2)

wow, and youre a nitrous sponsor?

ShiznityZ28

iTrader: (11)

Thanks for the info adding you to the don't listen to this guy list!

Go ahead and bogg a 400 shot and call me whith the fun ring land issues LOL

ShiznityZ28

iTrader: (11)

At no point should anyone have there nitrous af at 10 anthing. LOL

ShiznityZ28

iTrader: (11)

exactly!