2004 Cavalier 2.2 Turbo with Nitrious

[1100250747]

HI, I am looking for A little help with tuning my car. Any help would be much appreciated thank you.

[1100250747]

Anyone

[cobaltssoverbooster]

every time i read about cav's on here the pros tell them to run the factory bar sensors. something about them not really using them as much in internal calculations??

nitrous requires more fuel and reduced timing. so if you run a turbo setup find the max timing without nitrous then reduce it by about 7* to reduce heat when nitrous activates. this will prevent knock and land failure while you set the fuel ratio again.

2) Google is your friend!
Google nitrous tuning and read the instructions for installation to find out a nice fuel ratio for boosted cars and better recommended timing reductions. 2* of timing can reduce quite a bit of heat so by reducing 7* as a general start you can keep temps low in case something isnt quite right.

[1100250747]

Thank you for the reply my turbo install is almost done. Do i need to fake a 2 bar map sensor so my computer can read boost?

[cobaltssoverbooster]

Iirc j body, omega and yoecotect have inputed on that alot. Search their cavalier threads you'll find it there.

[planethax]

No need to Fake 2 bar the fueling is Alfa-N and is of no value.

[1100250747]

thank you

[1100250747]

What would be a good afr to start off with when i start tuning?

[1100250747]

I am running stock internals with about 30k miles on the motor looking to boost 6 to 7 pounds catless 2.25 exhaust and a 50 shot of nitrous

[cobaltssoverbooster]

what shot size are you shooting for?

if its smaller you can stay closer to boosted non nitrous afr.
if boosted non nitrous is 11.5-11.7 then boosted with good start is 11.2-11.4
If the gaps on the plugs open after a run or the sharp edges are no longer sharp, you are over timed.


to learn more research monte smith and his nitrous experience. he does work for nitrous companies for years and has put out great knowledge.

[1100250747]

Thank you, and im looking to run a 50 shot i was running a 75 shot n/a. I just wanna be on the safe side since i have no work on the engine. Right now i have my car running the turbo is on but the piping hasn't been finshed, anyways when i load the data into the timing histogram it asks for a lot of timing. about the same or more every time after i rewrite tune. Do u think my 02 sensor is give an accurate reading?

[cobaltssoverbooster]

Without logs and tune we can't help you here

[1100250747]

Here is the log file's and tunes

[1100250747]

Any suggestions. Idk why but every time i need to go to histogram settings and click timing adavance and do the table for the Row and Col axis in order to load data in

[Freakotec]

You tuning this thing with a wide band man? Your trims are all over the place in these logs and I'm not seeing anything for commanded afr, a wideband input or afr error in the logs so I'm kind of guessing not. Plus you should try to incorporate a few more pids into the logs so you can get a little more data input.

Try posting your config file as well just for the heck of it.

[planethax]

What Wideband do you have?

I have some nice J Body configs

[1100250747]

I have dynojet wideband but havent set it up. i am using just stock sensor for readings. I will try to install as soon as possible.

[1100250747]

Here is my configure file it is default i havent made no changes to it

[1100250747]

ON my wideband the 2 violet wires connect into my interface right?

[1100250747]

Any responses i have just installed the wideband