Really to see huge gains from a tune the air to fuel ratio needs to less than desirable prior to the tune. Say you added a blower and after the blower your baseline with the stock tune is only 50 more hp than stock. Well the tuner "adds more fuel" and now it gains and other 50 hp, so now it's has 100 more hp than stock. That's how mine went when i got it tuned after the blower.
I imagine the a/f ratio is still pretty close to stock after a cai so there wouldn't be that much room or need for adjustment in that department of tuning. I imagine the gains after a tune with the stock box and with a k&n would be similar since I bet the main thing they're adjusting is the timing.
Sent from my iPhone using Tapatalk
Let's talk about a relatively stock/oem engine.....The OEM software system is designed to adjust the fuelmixture up to 10% (25% on the 2000+ mod engines).......that’s more than enoughto handle fuel mixture adjustments up to 7,000 foot elevation change! (for high elevations 8,000+ there are oemsoftware programs for those specific applications).
Ok, let's just take a look at basic physics.....
The2013 Mustang 5.0 V8 (N/A), for example if close to stock (assuming 6,800 max rpm& 90% volumetric efficiency- note that is race car spec and likely higherthan reality) can only suck in a maximum of 535 CFM, and the OEM flat panel filter ( 12.375” x 9.675”) will flow 718cfm,
....so how can just a CAI force more air into an engine thatis already injesting everything it can? It can't plan & simple- basic lawsof physics without a forced induction system......I know...science and real data by an ISO certified testfacility.
The formula which is used by every air filter manufacturerin the world to determine the CFM for flat panel filters is...
Flat Panel CM= Length x Width x 6
So, take you relatively stock engine, calc the max CFM basedupon mfg specs; calc the max CFM the oem filter will flow....now show me howsticking a filter that will flow 900 CFM will increase the performance of anengine that can only suck in a max of 700 cfm and has an oem filter that willflow 700+? bad math, no science...all PR
materials for the sticker hpcrowd!
IMHo of course........