this thread is for chat about cars, tuning issues, or anything not fitting into another random thread.

have a problem with timing? fuel? injectors? go for it and let the questions fly.

 

going to pickin up hptuners soon. had the car previously tuned, but yet im always throwing a rich code. where would i go once i have hptuners to at least see this. gonna do more hmwk before i actually start tunning it.

 

can our cars lose a tune? or a tune goes bad after a while ?

 

What exactly is timing? The timing of the valves opening?

 

not that im aware of. of course stranger things have happened.


log the car, check the ltft at idle and part throttle. most likely the p0172 code is being tripped at idle. have to tweak the maf a bit to get it to stop tripping the code. i believe anything above -18 will trip the 172 code, and anything in the opposite direction will trip the 171 lean code.

also might want to check for leaks, and clean the maf itself

there is different levels of timing.

valve/cam timing. in a sense.

as far as the hpt side of it. it refers to when the spark plug fires. 18 degrees before tdc {top dead center} for instance. too much timing is hard on the rod bearings and could cause a huge failure. there is very very little gain to be had above 24 degree's total advance.


also, might try "howstuffworks"

i have the definition in my head, but it's hard to put into words

 

what if you're like me and don't have the knowledge to adjust/tune your own settings without blowing the engine into tiny pieces? Do most dyno shops offer a tuning service?

 

You will have to search your local dyno shops to see if they use HPTuners... But yes if they do it they should be able to do it, if you don't feel comfortable doing it yourself....


Bryan I got a question for you... but it's not for in here!

 

best thing to do, is find someone who has the knowledge of the software, and knowledge of how a motor works. there isn't that many tables in hpt for the cobalt side of things {ss/sc} but there is enough to destory the motor.


matt. pm me the question

 

is our engine vastly different or are the adjustable settings so specific to our engine that a reliable "professional" might be hard to find?

 

No the engine isn't vastly different, every motor is pretty much the same components...

Now the software and hardware to tune every car IS different though! Ask around to local tuners, find a reputible shop, and ask them if they use HPTuners!!

 

Thank you.

p.s.- very helpful thread Area47

 

He's my tuner and my good friend.... I have learned what I know from his knowledge!

 

tuning an lsj is by far easier than an lsx based vehicle. or diesel for that matter. however the 2.4 has better support, and more features. im going tonight to pull a base map out of an 08 c6, might even pull one from a c6z for ***** n grins.

 

O RLY?

 

yulp
you'll see

no im not getting a vette, im just curious.

 

in hpt where do you look to adjust the maf trying to get rid of rich code

 

but when you said the LE5 more features to tune, it is about even with the LSJ in truth becasue you have the tabledrelated to the SC and you VE to tune, where as the 2.4 has dynamic airflow. Each car has its on hurldes .

I have a C6zo6 tune I could emial you area

 

Area have a question for you, are CAI bad? Reason for asking is alot of thrown codes. I know alot of people use them. Can a tune fix this? Since my car is out of warranty, is their a better/cheaper stage kit that will offer the same result or yield more power?

 

engine>airflow>Genaral airflow>MAF Calabration

 

No CAI's are not bad... Both Area and myself are both running the K&N typhoon intakes! I don't know about him but I am sure neither one of us have thrown any codes from it!

Maybe he can shed more light on this.. but yes most if not all codes can be turned off or fixed through tuning and HPTuners!

 

ok ima have to find someone running close to same as me and compare what they have to mine to get an idea dont wan to put these numbers to far out of wack

 

What are your mods Power?

 

60 # injectors- 2.79 pully- stainless header- high flow cat and down pipe- 2 3/4 exhaust cold air intake-and nitro going in this or next weekend

 

Well:

Here ya go...

42.5# injectors, 2.85" pulley, Custom Honed Manifold, ZZP 3"-2.5" catted downpipe, 2.5" Magnaflow Exhaust, K&N Intake, and Area47's tune.

262.0 whp and 236.5 wtq! That was prior to my water injection that is on the car now and it's much more aggressive!

 

log ltft/stft vs maf hz.

my car idles in the 2100-2400 hz range. i think, id have to log it to find out for sure again. you can take 5-10% added into that to bring the ltft to a lower/smaller number that is closer to zero.

it takes a lot of time and pretty good mind to figure things out. one table can affect the entire thing. a lot of things look ok to the naked eye, but will affect it somewhere else down the road.

the only reason you will get a check engine light from a cai is the maf being dirty, something not sealed right somewhere. i throw lights everynow and then, i know what it is, but im lazy so i just clear it. hasn't come back in a week now, so i guess i got the maf happy enough to stop throwing a 172 code.


red, if you wanna e-mail it to me thats fine


i was just going to pull the files to kill sometime.