Faisal Sheikh
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Lexus just needs to quit gimping the low end torque of the 5L V8, that's why it feels like a pig, not enough torque down low. My LS430 and LS600hL have more balls down low than any of the F cars.
I own an RCF and granted it is lighter than GSF and significantly lighter than the LC500 by close to 400 lbs, the 5.0 Liter V8 is a masterpiece and I could not have asked for more. Absolutely a joy to listen to and rev all the way out as well as the razor sharp throttle response. One of the best engines Lexus ever put in a car this side of the LFA V10. Comparing this engine to your LS430 engine, is apples to oranges as 90% of the 390 ft-lbs on this engine stay from 4000 rpm all the way to 7450 rpm.
A high performance naturally aspirated engine that produces 95 HP/Liter, needs to be bored/stroked to not run out of steam at high rpms. In order to ensure it breathes well at high rpm, it is bored/stroked accordingly. That sacrifices low end torque mostly below 3000 rpm. Once over 3000 rpm, the engine pulls like a freight train starting at 4000 rpm and like I stated above, at any given rpm above it produces at least 90% of that even before the rev cut-off.
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