LDEUX

Check out this modded 2UR-GSE block that the LC 500, GS-F and RC-F share:


Highlights from the mod:

• Increased Bore Size from 94mm to 99.5 mm
• Increased Displacement from 4,969 cc (5.0L) to 5,569 (5.6L)
• Power increased from 467hp to 525hp
• Torque increased from 391 lb.-ft. to 440 lb.-ft.

Good to see more and more aftermarket shops modding the engine without forced induction.
I think it's a very capable machine especially with all the advancements Lexus put into it (e.g. direct-injection, dual VVT-i and VVTiE camshaft actuation).

Check out the whole article here.

Carnevino

Pretty cool! Just add a set of Sikky headers to the RCF and you'll get the same gains

SmurFPwr

i wonder why they did carrillo rods and a copper o-ring on the block just for 58hp more of gain unless they have plans to shove some air down that intake lol

SmurFPwr

Well yeah price is definitely going up but the factory rods are forged so to increase hp only 58hp (< 8hp extra per rod) that's pointless unless this build has bigger plans. Which is why I assume they are planning to go forced induction once they discover their way into that ecu. Same reason you do copper o-rings for big turbo builds so you don't blow a head gasket.

FR500GT

iTrader: (7)

My exhaust guy worked on that car!

Davew77

The GT3 is putting out more power on this block, 560 bhp IIRC. I wouldn't consider 525 bhp to be testing the limits of the engine. RR Racing is supposed to be testing a supercharger right now and they are projecting ~510-520 whp which translates to ~600 bhp and I wouldn't really consider that to be testing the limits of this engine either. I would consider that to be a conservative test of their FI system and tune.

This. Boring out the cylinders is expensive. It requires rebuilding the engine, which is what has to be done to replace the internals. The RC F internals are already forged, which is why it is a good platform for FI since it doesn't require a rebuild. You rebuild engines for 1000+ whp, not 525 bhp... But if someone likes wasting money, who am I to say anything? It's probably for bigger plans...

LDEUX

You're right.

Don't know about you but I'd like to keep my RC-F NA, so I was excited to see a power/torque mod on the block that didn't introduce FI. If I did do FI it would be TC not SC, that whine wouldn't fit the RC-F IMO.

JT2MA71

iTrader: (7)

I wonder how they're running it with the changed VE, piggyback ecu? standalone?

SmurFPwr

my guess would be its still on the factory ecu. i know on n/a Porsche engines the factory ecu will learn and adjust for the increase in bore/stroke when we go from 3.4 to 3.6/. But if this car ever goes turbo and they decide to test their theory on how much power this block will hold they will need standalone

finny76

The RCF def needs more Torque, and a 49~50 gain would be noticeable.

paulwall4

iTrader: (1)

The videos numbers were not accurate at all smh

SRTISF

iTrader: (1)

I want to see a built block like this with a set of ITB's. Between headers and ITB's that would make this engine so rev happy and hopefully increase low end torque pretty significantly.