Brake mean effective pressure - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

0ukami · 10-12-2010, 02:33 AM

Hi zilvia, I have a technical question. I've looked around but couldn't find anything even remotely related to what I'm looking for. This is for you technically trained zilvians out there:

Does anyone know the Brake Mean Effective Pressure (BMEP) of the factory-spec RB26DETT? I'm doing an independent research study on the power-making capabilities of the RB26, but I need enough information to crunch numbers, not ballpark figures.

Also, does anyone know the relation of this pressure to the amount of fuel and air (PSI) injected into each cylinder, and the increase of this pressure caused by a predetermined increase of said fuel and air?

If anyone out there can be of help, thank you.

~Oka

codyace · 10-13-2010, 09:40 AM

A pretty good BMEP resource:

Brake Mean Effective Pressure (BMEP): The Performance Yardstick

0ukami · 10-13-2010, 11:41 PM

Quote:

Originally Posted by codyace

A pretty good BMEP resource:

Brake Mean Effective Pressure (BMEP): The Performance Yardstick

Ah, thank you! This is very good information. I had the general formula but didn't quite know what units of measurement corresponded with horsepower, in regards to pressure, etc. I'm more familiar with a Newton Meters, and kilowatts, so quite frankly I was lost on unit conversions. Thanks!

~Oka

codyace · 10-14-2010, 12:46 PM

NO problem! BMEP is certainly an interesting way to compare engines....and that site does a great job on the forumula, and why the forumula is so. Scarey to think my car following that formula has a greater BMEP than an F1 or Nascar

10-12-2010, 02:33 AM	#1
0ukami Join Date: Jul 2008 Location: Los Angeles Age: 34 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	Brake mean effective pressure Hi zilvia, I have a technical question. I've looked around but couldn't find anything even remotely related to what I'm looking for. This is for you technically trained zilvians out there: Does anyone know the Brake Mean Effective Pressure (BMEP) of the factory-spec RB26DETT? I'm doing an independent research study on the power-making capabilities of the RB26, but I need enough information to crunch numbers, not ballpark figures. Also, does anyone know the relation of this pressure to the amount of fuel and air (PSI) injected into each cylinder, and the increase of this pressure caused by a predetermined increase of said fuel and air? If anyone out there can be of help, thank you. ~Oka

10-13-2010, 09:40 AM	#2
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 39 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	A pretty good BMEP resource: Brake Mean Effective Pressure (BMEP): The Performance Yardstick __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

10-14-2010, 12:46 PM	#4
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 39 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	NO problem! BMEP is certainly an interesting way to compare engines....and that site does a great job on the forumula, and why the forumula is so. Scarey to think my car following that formula has a greater BMEP than an F1 or Nascar __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy