71'bu

I've been searching for the past couple of days and can't find a definitive answer. Do I need to run a wideband controller if I am not going to be changing the motor mods around? Its a stock lq9 with a procharger. Its going to be dyno tuned, so if I am understanding correctly, I would need one to tune the A/F ration myself. I know with a gauge atleast, I will know what my ratio is. This is in a chevelle. Thanks guys

FourG63 97GST

iTrader: (1)

it'll become a monitoring device at that point.
you can dyno tuned and have them set it and forget it, if that's the type of person you are.

stevieturbo

If you have a competent tuner and they will be tuning it with all modifications done, then no you do not.

But, given how cheap they are, it is a very useful piece of information to have available all the time.

69-chvl

iTrader: (11)

I think when it comes to FI you really need to have one installed for monitoring purposes. If you want to wipe out a FI engine an improper AFR is a good way to do it.

71'bu

OK I will stick to buy the NGK controller than. Thanks guys

69-chvl

iTrader: (11)

There is some combination o2 and boost controllers out there, knocks 2 birds out with one stone.

71'bu

OK any recommendations? The only one I see is innovate

FourG63 97GST

iTrader: (1)

it's a procharger, boost control is in the pulley size, not boost controller.

69-chvl

iTrader: (11)

Good point.

69-chvl

iTrader: (11)

Have you thought about an aftermarket ecu? Not sure what it costs to have the factory ecu tuned on a dyno, but for $1600.00 your into the Holley and can easily tune it yourself and enjoy all the safeguards to help prevent blowing up your engine. And when you want to make a change you are not beholden to a tuner and his charges.

71'bu

Thanks guys. This into going to be my performance car; my next one will be. I don't trust myself doing tunes myself, FI is new for me. I'll stick get the wideband controller to stay safe and the bypass valve.

moto67

So would you need a separate controller to run a Wideband?

stevieturbo

You purchase wideband sensors/controllers as a kit.

One is useless without the other.

Speed Freek

iTrader: (2)

If you have any gauges at all I would suggest boost and AFR. Like said above just good as a monitoring device if nothing else.
Those are 2 things that you should keep an eye on, WG can fail causing boost issues and/or fuel pump could go bad causing a lean condition just a couple instances where they would come in very handy.

moto67

Bummer. I'm new to the LS game and recently found out the stock O2's are narrow band. I was hoping I'd be able to just plug into the ecu

stevieturbo

As indeed they are with most vehicles, nothing new there because it's an LS.

You could plug in and get NB data but of course this is less useful.

moto67

I have very little experience with FI motors. Only time I've ever used an AFR gauge was when I put one in my 67' nova with a small block. It was very useful in tuning my carb. I definitely see the benefit even if only to monitor. First time going boosted on anything as well so I'd like to know the system is doing what is supposed to.