Quote:
Originally Posted by steve99
no need to mess with that maf temp compensation table.
if your fuel trims on stage 1 tune maf scaling are only +3% to +5% throught the rpm range that good also log commamded afr and afr and see if they match throughout a full throttle run. if they do then thats good as well.
I looked at a guy with mishimto intake and it was pretty close to stock scaling maf wise, for his maf sensor anyway, you might be close as well.
if your fuel trims are max 5% and afr and commanded afr follow each other pretty well you could try copying the stage1 maf scaling into the stage2 map. This will make the stage 2 map run LEANER than intended but oft tunes tend to run on the rich side. If your on good 93 fuel you may be able to do this. again check for knock and check the fuel trims and that commanded afr and actual afr are following each other on wot runs.
if that looks ok then fine, if the afr and commanded afr dont follow you can still ise the vgi tool to do the open loop maf scaling to correct that as it just needs ltft commanded and actual afr and your ol fuel table.
then if its all still ok try the mishimoto intake if its same type as the guy i did they are prety close to stock maf scaling wise, you might have to tough up the ol maf scale again.
it wont be ideal without doing the closed loop scaling but if trims are only 5% that probably good enough untill you get the extra logging
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I'm on the Mishimoto Full CAI with the tube intake which is similar to Perrin CAI setup. So just to understand, I don't need to make changes to Stage 2 UEL and copying my stock IAT and and MAF Scaling over to Stage 2 tables, correct? Here is a screen shot of the data I capture today crusing on the highway running on Shell OCT 93. If you want a copy of this data, I can email it to you.
