When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Retarded timing when trying to build boost, hptuners...
I have been tuning my truck for a little bit now. First time tuning anything and I am running into a problem. Previously my tune was done by a local shop and there were some start up issues that I could not solve working with their tune. Therefore I started from a stock tune and have gotten to where I am not. Everything is looking good from what I can tell over the last year except for my timing when trying to build boost. I had never done any real drag racing since I started tuning myself so I didnt have the time to fix it previously.
Here is the problem... When I attempt to build boost my pcm is retarding the timing over 20* until it is retarded, around -3 to -6*. I never had this problem when I was working with the old tune. I am hoping that someone will look over my tine and quick log I took to see why it is doing this. I have messed with both timing tables, the iat timing tables and ect timing tables. I have disabled the knock sensors and Im seeing zero knock on the scanner.
If you have time please look at my tune and short log showing the issue. Thank you in advanced. Racing in two weekends and hoping to have this fixed before then.
try topping that chart out, instead of bottoming it out.
also if you keep having trouble i can post up a 6.0 cammed S480 billet tune up for you to pick and choose off of, just keep your fuel table, since its E85
Thanks! Ill try it when I get off in the morning. Im on e85 as well.
Originally Posted by denmah
try topping that chart out, instead of bottoming it out.
also if you keep having trouble i can post up a 6.0 cammed S480 billet tune up for you to pick and choose off of, just keep your fuel table, since its E85
First everything I say im helping not picking on your stuff.
Your timing map needs work, On the footbrake building boost your in the single digits of timing. I would add 5 like down in the high airmass lower rpms and midrange on the brake and start there. Ill post a example. Also that idle area is a mess.
Im sure your not using a EGR so 0 out the EGR spark advance table.
Disable your drive line abuse by rising the rpm to the 8000 or something. This may be your timing table that's killing you.
Torque management also needs turned off, set all your maximum torque limits to the moon.
Your ve table is terrible. It has to look like a smooth hill or your never have it dialed in.
Sorry btw I took awhile to get back with you, I had newborn baby issues.
Yes sir! Uploaded it that day and timing was right where it should be. Ive been waiting till I had time to compare what you changed so I can learn something. Im gonna shoot you a PM as well night. Thank you
Originally Posted by BLINGOLE
Sorry btw I took awhile to get back with you, I had newborn baby issues.
Like I said via email, thank you for the help. No hard feeling on anything as this is a big learning curve for me. I have been looking at what you posted and have not been able to play with my tune to see if I can learn for what you said as well.
I have the race this Saturday and will be hopefully straightening most of the tune out Friday when I get off work in the morning.
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Retarded timing when trying to build boost, hptuners... 
