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Featuring all modded, custom and clean Engine Bays!

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Member Credit: EddyMaxx

I’ve been going to King Muffler for the past 3-4 years for exhaust welding work on my Maxima’s. Took me a while to find decent place with quality work with reasonable pricing. Jose is the owner and does great work. Clean welds and great pricing. He’s a stand-up and reasonable guy. Not to mention that he works on Maxima’s ALL THE TIME!!

Tell him that Eddy in the white Nissan Maxima referred you. 

Shop Address:

King Muffler
104-32 45th Avenue
Corona, NY 11368

Phone: 718-424-1940 (Ask for Jose)

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Gallery of Maxima’s with upgraded Big Brake Kits (BBK).

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This is a gallery of custom interior seat setups on Nissan Maxima’s.

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This is a gallery of custom steering wheel setups on Nissan Maxima’s.

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Photos of Maxima’s and their dear family pets aka Best Friends.

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Photo Credits: Raymond Anthony, Philly Rillin, Kairon Coley, Ray Love, Lauren Jackson, Mike Rios, Eddy, Nikky Nixmax, Donavin Pearson, Lauren Jackson, Manny Brea

 

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Source Credit: SAFR Tool

Air Fuel Ratio (AFR) is the ratio of air to fuel in an internal combustion engine. The AFR is an important measure for performance-tuning reasons. If exactly enough air is provided to completely burn all of the fuel, the ratio is known as the stoichiometric mixture which is defined as an 14.6 AFR ratio. The lower the AFR the richer the mixture. The higher the AFR the leaner the mixture.

  • 6 AFR – Rich Burn Limit (engine fully warm)
  • 9 AFR – Black Smoke | Low Power
  • 11.5 AFR – Best Rich Torque at Wide Open Throttle (WOT)
  • 12.2 AFR – Safe Best Power at Wide Open Throttle (WOT)
  • 13.3 AFR – Lean Best Torque
  • 14.6 AFR – Stoichimometirc Air/Fuel Ratio Value (Stoich)
  • 15.5 AFR – Lean Cruise
  • 16.5 AFR – Usual Best Economy
  • 18 AFR – Carbureted Lean Burn Limit
  • 22+ AFR – EEC / EFI Lean Burn Limit

IDLE / LIGHT CRUISE: 13.5 AFR
When you start your vehicle we refer to this as being in IDLE condition. When you shift into gear and drive at a low mph we refer to this as being a LIGHT CRUISE driving condition. With 14.6 being the industry standard stoich AFR value, we typically like to see these conditions run slightly richer. We are looking to fine tune an engine to get the smoothest operation.

CRUISING: 14 AFR
Most of the time you are driving your vehicle you will be within the state of CRUISING. This condition is the most wide open for customer preference based on two factors. If you prefer better GAS MILEAGE then run a leaner mixture. Most stock to slightly modified engines will run just fine at an AFR of 15 and yield better MPG. If you prefer better PERFORMANCE then we suggest to run an AFR of 14 or even richer to around 13.

WIDE OPEN THROTTLE: 12.5 AFR
Driving full out within a gear will bring you into a WIDE OPEN THROTTLE driving condition. This condition is where the peak horsepower value is obtained. We typcially like to run a richer AFR here to get the best performance. Best performance for most vehicles is in the 12.5 to 13 AFR range. Going too rich will have the opposite affect and decrease your performance.

ACCELERATION: 12 AFR
Getting up to cruising speed or getting ready to pass someone, you usually are looking for the performance to get up and go. We refer to any fast turn of the throttle as being in an ACCELERATION driving condition. Again, we typcially like to run a richer AFR here to get the best performance. Best performance for most vehicles is around 12 AFR. Going too rich will cause a sluggish roll-on to get up to speed.

NOTE: OPTIMAL AFR VALUES WILL CHANGE BASED ON FORCED AIR INDUCTION VS NATURALLY ASPIRATED AND FUEL TYPES

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