Hi all, I was hoping someone could help me or provide a tune that will be a good starting point after installing a 2.55" supercharger pulley? I consider myself pretty handy with natrally asperated LS engines, but no experience with supercharged. Thanks!
you will need injectors for starters
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heres a tune file, 11.5 afr and 16ish degrees of timing, ran 11.5 at 119 mph on warm weather. 2.55 pulley only, stock exhaust/cats etc.
did you install the pulley, do you have a log?
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Originally Posted by cesar
Hello Guys,
I have a CTS V here with the lingenfelter 650 upgrade and I cant seem to the thing to richen up at 2,000 rpms to 3,000 rpms. I would think I would have plenty of fuel and I attached the map I have so far? Am I missing something which would cause the vehicle to run at 13.0 air fuel? Any help is greatly appreciated 12.9.14 fuel changes.hpt
What does your pcm commanded afr show in the 2-3k range?
2009 CTS-V Sedan
Lingenfelter 650 kit, ID850, AR 1.875" Headers, SW 3" Exhaust, Hptuners pro
Thank you! This looks like a good starting point... Is 11.5 as far as you want to go with the blower? I would usually limit my NA LS2 to 12.5...
dont go any leaner than 11.5 afr on your vehicle, anywhere from 10.8-11.5 is fine. It is a different tune when you have forced induction.
fuel cut maybe? disable fuel control of boost in your supercharger tab
What was the DA when you ran this? Tune might be holding you back. I ran an 11.47 @ 121.4 mph with stock pulleys, stock tune. I do have an Airaid intake and eliminated the two rear cats only.
Here's the log I ran on the 11.468 pass. I have a 2013 Coupe. Lots of knock retard too with stock tune. Look at my IAT1 and IAT2 temps. I ran both fans in the staging lanes and let the engine continue to idle.
da was at 2k and the car is a sedan pulley only , ran 12.5 stock
You must have a factory freak, that MPH is ridiculous for being stock
Ill agree tho that if the cats are removed i could run a degree or two more of timing and probably trap at 2 mph higher. Car is an 09 btw, in fact this car was ran at royal purple raceway and i see nothing but pulley/cammed ctsv's running high 11s trapping 120 mph all day there. Tuned by G force.
The DA was -1300 when I ran that 11.468. And with my IATs so low it makes a difference. I did have drag radials and ran a 1.68 60'.
Gotcha thanks for the info, the 11.5 was ran on street tires 1.9 60 ft and ambient temps were in the low 80s high 70s so im assuming iat's were a bit toasty. Thanks for the info 8850
It's probably the blending of dynamic airflow being active below 4000. You should make tweaks to the SD side as well.
Hello Proxses,
What tables should I be changing on the SD sides and adding or subtracting the numbers . Thank you for your assistance. Also Anyone else that can chime in and help would be greatly appreciated. I have attached a log file on the most recent run and dyno graph along with the map. Its odd that is will fluctuate so drastically https://www.dropbox.com/sh/8ydv6q50t...3cjRduUJa?dl=0
I think he's referring to the VE tables.
What mods do you have? Your 65-115 mph is very good at 5.843 seconds. Assuming your speedometer is dead on. That's the speed I've been using to determine what changes do for my V. On an 11.468 @ 121.44 mph my 65-115 was 6.131. You must be close to 10s at that time. I was running slightly smaller drag radials so my speedometer could be off some.
Hello 8850,
its a CTS -V with the lingenfelter 650 upgrade. I am just surprised how low the power is for a 650 kit? Do they normally run like that?
http://www.lingenfelter.com/mm5/merc...2#.VI9_QHvsfaU
Thank you
I think they are referring to flywheel hp. If you had 650 rwhp you should run much better. I really don't see getting 650 flywheel hp even with pulleys with the stock air box and exhaust. My 2013 V picked up considerably with an Airaid intake. I've looked at the stock cat pipes and they are double walled and appear to be very restrictive. Not to mention all the crushed and dented portions in the rest of the exhaust.
To give you an example, my stock V ran a 7.660 65-115. With an Airaid 7.098. My best with stock pulleys, Airaid, ported tb and rear two cats removed and with 3" smoth piping into stock mufflers, no tuning is a 6.068 but in 46* air. Not sure of ambient temps on other passes but much warmer and higher DA so not a direct comparison.
I'll throw in my stock 2012 Z06 time of 5.569! And with headers, intake and tune it was into the 4.9xx range.
After reviewing your log you are getting up to 4.1* of kr. Have you verified your afr at that commanded 11.38 with a wideband? Maybe a little to lean???
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