batesyellow01

I am new to EFI tuning. Have an 01 Vette, Lt's ,high flow cats, Borla cat backs, CAI, 160 thermo, Descreened MAF, 6 speed, EFILIVE scan and tune, 100 wet shot N02. My question is in the B5913 high octane table I need to drop timing 4 degree's for the 100 wet shot at WOT. I'm not exactly sure from what RPM range to change cells and what the values needed to change. Do I change the cells at a percentage,
or (-4) from the selected cells? I hope this is not a stupid question but, I've posted on EFILIVE and CF Forums with no response. I don't want to try the NO2 until the timing is taken out the 4 degrees, afraid of detonation. I don't beleive I need to change the AFR being it is a wet shot and will be adding fuel
along with the NO2. I know I will be needing a wideband as soon as my funds allow me then I can monitor the actual AFR. Any help appriciated.

98Z28CobraKiller

iTrader: (17)

Just lower all of the cells from .76 to 1.00 across the whole rpm range.

You should check a WOT pass with a WB to make sure that your AFR is ok and that you don't have to go larger or smaller on the jet sizing.

batesyellow01

Thank you for the info I've been asking around for a week I post on here and get some info right off.. I will be getting the wideband next, you're right I may need to use a 150 shot fuel nozzle, 100 shot NO2 , or so on, depending on the actual AFR at WOT during the shot, making sure I'm not too lean, of course need to watch for too rich also , don't want a NO2 backfire I know I have alot of reading up to do , logging , experimenting etc. Stuff I want to learn so I can keep my car tuned or eventually help others , I did do a search first on the high octane table but, didn't find anything specific to my question, so thanks once again!

EFILive

iTrader: (2)

You may also want to check out EFILive's custom OS for nitrous. It has extra features to control fuel and spark hooked up to your nitrous switch.
http://forum.efilive.com/showthread.php?t=2599

Regards
Paul