MINI2 - MINI Forum - View Single Post - Revolution Mini Works cylinder head/header 246whp!

k-huevo · Dec 11th, 2007, 01:57 PM

I’m not a detractor; RMW products deserve attention, but I would like the readership to be aware of some things when evaluating the numbers. There is nothing wrong with quoting peak numbers, however often times they are quoted (by vendors and enthusiastic users) without mentioning redline has been moved and peak numbers were obtained at higher rpm than base numbers. When you see a baseline peak number at higher than stock’s redline, the base number was obtained with a modified ECU. When looking at deltas at the drag strip, a torque peak at higher rpm (and/or manipulated redline) provides a later shift point which can eliminate the need for one shifting event depending on the transmission model, eliminating a shift alone can improve times; more torque later in the rpm band is a product of headwork and can be in some degree a function of the ECU program, higher redline is a function of program manipulation. I’m a big proponent of headwork but keep in mind whether the ECU has been optimized for either or both heads being evaluated and whether improvements have also been made on the exhaust side. There are other things to look for also, just dig a little deeper than peak numbers for comparison.

Dec 11th, 2007, 01:57 PM	#8
k-huevo Trailer Trash Join Date: Mar 2005 Location: Pipe Creek, Texas Local Time: 06:27 AM Posts: 157 Offline	I’m not a detractor; RMW products deserve attention, but I would like the readership to be aware of some things when evaluating the numbers. There is nothing wrong with quoting peak numbers, however often times they are quoted (by vendors and enthusiastic users) without mentioning redline has been moved and peak numbers were obtained at higher rpm than base numbers. When you see a baseline peak number at higher than stock’s redline, the base number was obtained with a modified ECU. When looking at deltas at the drag strip, a torque peak at higher rpm (and/or manipulated redline) provides a later shift point which can eliminate the need for one shifting event depending on the transmission model, eliminating a shift alone can improve times; more torque later in the rpm band is a product of headwork and can be in some degree a function of the ECU program, higher redline is a function of program manipulation. I’m a big proponent of headwork but keep in mind whether the ECU has been optimized for either or both heads being evaluated and whether improvements have also been made on the exhaust side. There are other things to look for also, just dig a little deeper than peak numbers for comparison.