lexus races, interesting

[UZZ30-Québec]

never new lexus was that much dedicated in racing
http://www.lexus.com/about/events/lexus_motorsports.html

now you all know it's possible to push 500BHP from a N/A 3UZ :006:

I wonder if they are limited in HP output by the valvetrain since there's not roller rockers.

 

[Zuffen]

Probably doesn't need roller rockers because it doesn't have any rockers! DOHC 32 valve engine.

The only rockers you will find in that car are the rockers used in the pushrod suspension.

 

[UZZ30-Québec]

no there are DOHC engines with roller rockers.

Mazda's JE-ZE 3.0 liter 24 valves (mazda 929) has roller rockers. Or maybe they're not called roller rockers, roller lifters? is so I'm sorry for mispelling.

Next Generation UR toyota V8 will also use roller rockers.

 

[Anaema]

nothing special, its just 500BHP. at the compression, cams an intakes they use, i bet they could make at least 600 BHP. the reason they make so little is the restrictors. i think that all major racing series use intake restrictors.

 

[DHBomber]

Well, they had the engines in their super gt cars already... for the protos I believe they stepped up the displacement to 5L for this last race.