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Hey guys, i just got my car tuned a few weeks ago but the tuner didn't touch the cam tuning. So i'm running stock VVT tables with a set of BC stage 2 cams.
I'm not sure if thats a bad thing or just a safe thing but i'm wondering if anyone would be willing to show me their BC stage 2 cam VVT tables.
If i'm not mistaken the VVT table for NA, Turbo, and Supercharger may differ slightly depending on whats done but it has to be better than stock. Thanks All.
From what I've gathered there is no exact science but rather a guess and check method - find what changes make more torque and slowly push those changes.
share what you find on this ... interested for sure
https://forum.hptuners.com/showthrea...VT-Tuning-info
Simple cam tuning rules for NATURALLY ASPIRATED engines:
Advancing both cams => more low-RPM power, less high-RPM power
Retarding both cams => more high-RPM power, less low-RPM power
Less overlap => more low-RPM power, less high-RPM power
More overlap => more high-RPM power, less low-RPM power
Ill rewatch it, and see if i can do it on the road.
just my two-cents but road-tuning anything ignition-related isnt a good idea ... how would you tell if you are making gains?
your car is obviously tuned, why risk it? Just go rent an hour or two of dyno-time and have your tuner accompany you while you experiment with the VTC?
I'd hate to see you get this far with your car only to have a few tweaks to your ignition and jeopardize your build over 10-15 ft*lbs
Ok here is my tuned cam phasing vs haltechs stock cam phasing.
Stock Map
Tuned Map
So it seems like my map isn't very linear at all and and stops on the higher end of of midway. I'm almost wanting to put the stock map on to see how much it changes the feel. Right now it feels like Meh until about 4-4.5k the exhaust pitch changes and the car feels like it has loads of torque. I doubt just changing cam phasing will do much or anything at all but worth a try.
^it's probably a moot point - can you (in a NA setup) hit 0in*hg of vac / 0 psi at 3500rpm?
Conway - I'm nervous for ya ... All I can say is log your knock signal a few pulls with the map your tuner made you and log your knock for these changes you've made.
Are you familiar with the Uprev knock-signal listening device? I've tinkered with my ignition map outside of a dyno to smooth things out but did it very very cautiously and while listening to the knock sensor.
^it's probably a moot point - can you (in a NA setup) hit 0in*hg of vac / 0 psi at 3500rpm?
Conway - I'm nervous for ya ... All I can say is log your knock signal a few pulls with the map your tuner made you and log your knock for these changes you've made.
Are you familiar with the Uprev knock-signal listening device? I've tinkered with my ignition map outside of a dyno to smooth things out but did it very very cautiously and while listening to the knock sensor.
Yea, anytime you go WOT it's 0 psi or very very close. I've monitored knock a few times and i'm not seeing anything.
This is exactly why i just need to be super frugal until i can afford BluestreamDE's supercharger and just go to Z1 and have them tune the car the correct way.
Yea, anytime you go WOT it's 0 psi or very very close. I've monitored knock a few times and i'm not seeing anything.
This is exactly why i just need to be super frugal until i can afford BluestreamDE's supercharger and just go to Z1 and have them tune the car the correct way.
I think you're tuner did a good job ... see if he can sit-in with you while you tinker with the cam timing map to see where your sweet spot is. You tinker with it while he drives the car and listens for knock. Two or three hours of dyno time is all you need? what's that? like $200 to $300??
Side note, does anyone know if the DE has the ability to retard the IVT Cams and not only advance them?
the phasers uses oil pressure to advance the timing. No retard is possible with the oem config. When the solenoid are unplugged the cams are at most retarded position ( which according to fsm , is a tiny bit (5 to 10 degree) advanced compare to cam lobe centerline with tdc.
Cam Tuning
