[Dimman]

Originally Posted by Ryephile

Kaizen...I had to look that up That'll be my international vocabulary lesson for today.


Let's look at this engine topic from another angle; what other current production naturally aspirated engines that are sold in the USA [i.e. level emissions playing field] have noteworthy BMEP? I'll omit cars over $100k, as the budget for applying technology is hardly a fair comparison.

Car___________________Engine___Torque____BMEP
Acura TSX_____________144 cuin, 172 LbFt = 180 PSI
Honda Civic SI__________144 cuin, 170 LbFt = 178 PSI
BMW ///M3_____________244 cuin, 295 LbFt = 182 PSI
Corvette Z06___________427 cuin, 470 LbFt = 166 PSI
Ford Mustang GT________302 cuin, 390 LbFt = 195 PSI
Hyundai Genesis R-spec__307 cuin, 376 LbFt = 185 PSI
Infiniti G37 IPL__________225 cuin, 276 LbFt = 185 PSI
Lexus IS350____________210 cuin, 277 LbFt = 199 PSI
Mazda Miata____________122 cuin, 140 LbFt = 173 PSI
MINI Cooper_____________98 cuin, 118 LbFt = 182 PSI
Porsche Cayman R_______207 cuin, 273 LbFt = 199 PSI

FT-86_________________122 cuin, 151 LbFt = 187 PSI

It's right there in 4th place....not crap, just not the best. Just for giggles, it's better than the Lexus LFA's 182 PSI.

Less than the lower-performance 2GRFSE in the IS350.

Less than its spiritual predecessor.

Just friction-wise this motor, by account of its smaller bore/piston circumference, should have less friction than the 2GRFSE from less surface area on the skirts/rings. Then the lighter pistons maybe don't need the same diameter pins, rods, rod bolts or main journals. Friction and inertia benefits there as well. All these little things add up, and will be looked at. Now account for the increased compression (2GRFSE is 11.8:1) and between the increase pressure and decreased friction that should cover a BMEP increase right there. If it's tuned for 4000 rpm vs 4800 rpm in the 2GRFSE, more friction reduction and more BMEP. And the 2GRFSE doesn't even use ACIS to extend its intake tuning range. (However we don't know if this FA20 does either.)

To give an example of how important kaizen is to Toyota, the original slogan for Lexus, 'The relentless pursuit of perfection', is a literal translation of the word.