Originally Posted by plumbob (Post 699388)

Sorry for the dumb question from this stock guy, but how is the mix sensed/regulated without a MAF?

Originally Posted by bumpin96monte (Post 699393)

Without a MAF, you can control fueling via the MAP sensor and RPM. Even though you're not directly measuring the airflow, you tune it to know how much air to expect at X rpm and Y MAP value (be that vacuum or boost).

I don't know anything about the Holley setup specifically, but I assume that's what it uses.

That's actually what the stock pcm uses if there are certain types of failures (ie MAF comes unplugged / fails completely) It can default to running off the map sensor instead as its got a completely separate set of tables for that.

Originally Posted by turbo monte (Post 699412)

Very cool! Never thought about the CTS-V fuel pump... Wonder what the wife would say if her fuel pump went "missing". :rotfl:

So this Holly stuff, if that allowing them to tune speed density now?

Yes it will tune speed density method., also read the TurboCharger section, this can be made to function as a Anti-Lag system.

•Speed density, Alpha-N, Alpha-N Combination, and VE fueling strategies – Tuner has the option to select from a variety of load sensing strategies to meet their engine requirements or tuning preference
•Individual cylinder fuel and spark control allows you to unlock your engine’s potential
•Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
•Advanced idle, closed loop, and enrichment strategies allow for very stable engine operation
•1-5 Bar MAP sensor capability – For naturally aspirated or boosted applications
•Fuel Map and Learn Function Smoothing – Helps to smooth rough areas of the maps
TURBOCHARGER BOOST CONTROL
•Fully featured boost control capability eliminates the need for a separate boost control device
•Can be configured to control boost based on time, gear, speed, and manual inputs
•Gear based boost control configurable by several different methods
•“Boost Builder” functions offer the ability to assist building boost on the starting line by altering ignition timing, fueling, as well as nitrous oxide activation. Can also be used as an Anti-Lag function


•Fuel Map and Learn Function Smoothing – Helps to smooth rough areas of the maps
•Configurable User Password Protection – “Lock” your tune to prevent tampering
•Self-tuning fuel table strategy greatly simplifies tuning process – The more you drive it, the more it learns
•“Quick Start” strategies – For faster engine starting
•Allows for use of common OEM sensors as well as custom sensor calibration input
•Two channel knock control sensor inputs for both one or two wire knock sensors
•Dedicated fuel and oil pressure inputs
•Controls both stepper and PWM Idle Air Control (IAC) motors
•3 Rev Limiters – Choose between 4 options for each: Fuel Only, Spark Only, Fuel and Spark, or Soft
•Traction Control – Allows power reduction via timing, nitrous percentage or boost (Requires Davis Technologies Holley Module)
•Store and select between four calibrations with Multi Map Selector (Part Number 558-407)

INTEGRATED WATER/METHANOL INJECTION CONTROL
•Uses Holley water/meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter water/meth flow as a percentage of fuel injector flow for water/meth tuning precision unmatched in the industry
•Allows for two nozzles to be controlled
•Nozzles available from 400 to 1000 cc/min
•Complete control of pump activation, and low system safety features


You may need bigger injectors also, I am probably gonna need bigger ones also and I currently have 80# ones too.
Glad you mentioned that, will bring that issue up with Matt, Thanks John

Curious to see how this works for you!!! Good luck my friend, let's both keep the whp bar going up ;)

Originally Posted by bumpin96monte (Post 702762)

Curious to hear how those tires hook up with all that power. I figured you would've had to have gone to a drag radial to put down all that power you're making!