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so the car hunting timing has been resolved. i had a row in my timing table that was out of whack. it stood out more when i went to the 3d graph.

the crazy knock boost issue i think is engine...

thanks for the suggestions.



thanks. ill try increasing timing in the cells that have the jumping timing.



thanks. ill look into that and make some adjustments.
I kept letting off...

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thanks area47. from what I understand, the OP spark tables are urgency tables. I know the tune I'm running has a flat rate of 15. ive gone through the OP spark threads and...

aren't factory values set to 8 in that table? so I need to set them to 0?

As the title states, I have an issue where I accelerate normally and once in a while my boost, airload, and knock go crazy and it sounds like Honda with a giant exhaust can and accelerates like a...

Ok, thanks. that makes sense, yet i am once again confused. with the stock LHU cams, to get the most overlap possible, i'd want the intake table at 10 (because 10 is actually 0), and the exhaust at...

so, if im understanding this right (which im probably not lol) based on the stock intake cam table and injection table, the injector starts to fire 20 degrees before the intake cam starts to open?...

im a little confused here. if it reads 0, wouldnt the exhaust valve be closed at 360?

I don't know much about the Interceptor gauges. but apparently they plug into the OBD2 port and you can daisy chain off of them...? but, what I found on forums is that when you're trying to plug into...

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I have an idle question. I have a log of a cold start. the first 5 seconds or so it ran rough, then smoothed out and I got 3 degrees or so advance. much better than what I've been getting...

this is what i get when i subtract the spark from OP spark in your tune.

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here's a stock OP Spark table with the Spark table values subtracted from the OP Spark table.
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and mine...

im going to tweak things in the low load columns and log my car as i idle and press the pedal to see what it does with different inputs in the OP Spark tables. im sure that'll help me understand...

ok, i think i understand. have it match the spark table with slight changes depending on how responsive i want the throttle to be in certain areas...

i was under the impression that spark timing...

if im understanding things right, the opti spark tables deal with throttle plate movements based on changes in pedal input? higher numbers in the opti spark table makes the throttle plate really...

http://www.hptuners.com/forum/showthread.php?38357-LNF-Guides

CobaltSSoverbooster has an LNF thread with links to lots of good info on tuning the lnf. he also has tuning videos that are really helpful. ive watched all of them multiple times. id say start there....

I used the lhu exhaust manifold and intake. the map sensor hole on the lhu intake manifold is smaller so a smaller o-ring needs to be used than what was supplied with my 3 bar sensors. also, the bolt...

I know this thread is old but I just did an LHU swap to my cobalt ss and have a couple more differences between engines to add.

1. the hole for the MAP sensor on the LHU intake manifold is...

Not sure if this response is too late but I am in the same boat. my lhu will be at my house tomorrow and my broke lnf is already out of my cobalt. I know the exhaust manifolds are different and the...

I had a bit of luck setting up my own gauges and graphs. CSSOB has some good videos he made. Some things have changed like histograms are now called graphs... The hardest thing I've found is...

I'm waiting for my pro setup to arrive and so I'm trying to learn as much as I can. My Cobalt LNF was popping up top so I wanted to see what's going on there. And Friday found out my intercooler end...