MattSapp95_T/A

iTrader: (35)

I am about ready to finish the tune on my Turbo LS motor...

I am already running a speed density tune and I am considering ditching the o2s all together (except my wideband and gauge)

Who else is running this setup? How do you like it?

On a side note my car is a weekend warrior and only driven in nice weather and I live in Florida so no huge altitude changes...

Thanks
Matt

LS1NOVA

iTrader: (12)

That would be open loop speed density. I think I started a thread called olsd vs clsd if you want to search for it. Plenty of guys running it on more serious cars. For a street car you will want 02's for fuel trims unless you like watching the tune all the time.

Fbodyjunkie06

iTrader: (10)

Not turbo anymore, but I run OLSD on my car. I don't mind busting the lap top out if need be.

MattSapp95_T/A

iTrader: (35)

well I don't tune any myself (never tried) how often did you need to make adjustments?

Fbodyjunkie06

iTrader: (10)

Haven't really had this car long enough to tell. Only adjustment I've made so far was PE(WOT), I left the open loop eq ratio alone.

got-a-ls1

iTrader: (12)

love my olsd.. of course if you dont have the ability to tune i would keep the sensors. i dont have a problem at all even with big temp swings and different seasons.. if your tune is on your good.

MattSapp95_T/A

iTrader: (35)

well I am pretty confident in my tuner getting the tune spot on.

I may try the open loop and see how it goes... I like things simple lol....

CL is only really useful for cruising right? Once WOT its all OL anyway?

Sorry for my ignorance here

Blackbird-WS6

iTrader: (15)

I had it done on my car and hated it, I'm also in FL, for a street car and dont want to mess with the tune i would say with the o2s.....just my .02

Fbodyjunkie06

iTrader: (10)

This is the reason why people should learn to tune their own car. It's really not hard. If you can do simple math you can dial in your afr.

WS6HUMMER

iTrader: (19)

I tune mine & run OLSD 3bar VIA HPT. I tune it every pass, gotta keep this stock motor living! Honestly on the street its not a big deal, my little 76 makes boost so fast I'd have to be wanting to outrun the poletzia or get arrested to do damage to the motor from the weather changes. I keep it tuned for 11.6 under boost & when the temperature drops I'll drop the PE/Boost Enrichment .2 richer & then dial it in from there. You could make it stupid rich and run it like that all year but I wouldn't advise it.

Fbodyjunkie06

iTrader: (10)

Contrary to popular belief running a motor rich won't normally make it safe, just a little greedy on the timing with it rich can and usually is worse than running it lean.

MattSapp95_T/A

iTrader: (35)

Well I have the o2 sensors on the car as of now so i guess I can just leave them... I have heard a lot of guys say that they burn them out really quick on turbo cars though... any input on that?

Maybe I do need to start working on doing my own tuning....

WS6HUMMER

iTrader: (19)

Never heard of that, mine stay's in my car at all times, its not good to run a car without warming/powering up an O2 sensor though. I have and extra O2 sensor & set of cables for my LM1 when I tune someone else's car.

Blackbird-WS6

iTrader: (15)

Iv heard that when the placement of them was set wrong

WS6HUMMER

iTrader: (19)

Yeah, like maybe like 1" from the turbine housing. I have my W/B sensor a very safe distance away from what I've researched when I built mine but I have seen a lot of builds with the sensor closer than what I have come to understand is safe, a lot of people seem to be getting away with it. FWIW my whole hotside is 304 SS & the crossover has turned colors from heat but the 4" DP is big enough I guess it dissipates the heat very well. You can look at the DP and tell it takes way less heat, its still almost the same color as when I first fired it up. My theory is that its the diameter of the pipe that helps it cool down the EGT's after the turbine.

Fbodyjunkie06

iTrader: (10)

I fouled my 02 sensors out one day at the track along with my plugs when I set the start point of my methanol injection at way too low of an RPM on accident. Loaded the motor up with fuel. I think the reason you hear people with turbo cars burn them out is that they are using leaded race gas which will foul narrowband O2's up quickly.

WS6HUMMER

iTrader: (19)

The meth thing is pretty interesting, I've never heard that but I see how that could work. Then again a 2 step dumps raw unburnt fuel straight into the crossover. I myself run pump gas all the time but when I go to the track I use straight C-16, I have only replaced the sensor once since I bought my LM1 in 2006. Keep in mind though you can do a "free air calibration" with the Innovate Wideband Controllers to keep things accurate.

SirNemesis

OLSD here, wouldn't have it any other way!

Tiago

iTrader: (27)

I have never used the stock O2s after I went to 3bar OS

5.3blazer

been driving mine for 2 years open loop and dont mind it at all,even drive it threw the snow