Tuning w/out wideband?

[RadRacer]

How accurate will it be? I don't have the funds ATM; a buddy has HP Tuners and is going to tune my 97 Camaro if I buy the license ($100). I'm wondering if he can really tune it without the wideband, if I should wait and get a wideband first, or go ahead and tune it with narrowbands and retune later when I get a wideband.

[ssms5411]

Re: Tuning w/out wideband?

Really can't tune it without a wideband, my narrow bands will read the same at WOT if it is 12.0 or 13.0 A/F, so I would play it safe rather than hurting your engine.

[Meatyshells]

Re: Tuning w/out wideband?

if your cars an auto he can mess with the shifts and stuff lol

[ssms5411]

Re: Tuning w/out wideband?

if your cars an auto he can mess with the shifts and stuff lol

Also fans , speed limiter, correct tire height and gears, I think he installed a cam so he might run lean, he could add a little fuel to be safe, scan for KR and thats about it. Don't add any timing , Look on vipers write up and go to under fuel control ,PE ,Base A/F vs ECT and you could put in like 12.5 to 12.9 in there, but I don't remeber what add vs rpm is on a stock tune. Might make you go too rich, that where the wideband comes into play.

[RadRacer]

Re: Tuning w/out wideband?

I think I am running rich right now; i don't know if it's because I have no cat, but you can smell gas fumes when I'm idling. I do have a cam (GT2), and it is untuned; I plan on putting bigger injectors in too, so he could go ahead and do that too right?

[Blizzard242]

Re: Tuning w/out wideband?

You can.. but you gotta look at ltft's and all that stuff. I've been learning a ton here in the past week and theres a lot more to tuning than just a wideband. A wideband can make it a ton easier though. Don't expect him to be able to do it in one day though. Especially with older ECMs, they take a little while to relearn fuel trims.

[RadRacer]

Re: Tuning w/out wideband?

Ya, we're gonna make it a weekend project. Thinking 3 days, just to make sure everything's running right. But, I may wait and save up for a wideband now; idk yet.

[xmetallicaxguitaristx]

Re: Tuning w/out wideband?

I just bought this:

http://cgi.ebay.com/ebaymotors/ws/eB...269063062&rd=1

It was between that, and the AEM UEGO. The reason I spent the extra $50 is cause that comes with data logging software and had some other features that I liked over the AEM. Also it's a little more accurate.

[Blizzard242]

Re: Tuning w/out wideband?

Ya, we're gonna make it a weekend project. Thinking 3 days, just to make sure everything's running right. But, I may wait and save up for a wideband now; idk yet.

Eh.. mines been taking like over a week. That is through email though. And it will take like 2 days of driving after tweeking the MAF or VE or other things just for the LTFT to settle. If he knows what he's doin then yeah go for it.

[RadRacer]

Re: Tuning w/out wideband?

Well, he's got a guide from some company on how to use HP Tuners or something. He said he did abit of tinkerin before with his car ('98 S/C Z-28), but now that he has this book, he understands alot more. We're going to aim for a 2-3 day project, but worst comes to worst we'll get a drivable tune in there and set aside another weekend to work on it some more. I mainly want to get the cam tuned in abit better (still stock tune) for WOT, stop the stalling when drivin around, and correct for my gear change. If I can get the injectors in too that'll be sweet :)

[TBO98]

Re: Tuning w/out wideband?

Without a wideband you will be be guessing at the real AFR. Much like ssms5411 said you can have an afr change of 1 or more and the o2's will stay about the same....