05RollaXRS

Thanks to LexusEnthusiast.com

KJH

Do we know whether the LFA has the new 5.3L motor or the old 4.8?

Ken.

05RollaXRS

The 5.3 Liter V10. The 4.8 Liter V10 is no longer racing. It has been retired.

KJH

Many thanks for the quick response.

Ken.

TF109B

Thats the updated LFA Code X. #53 = 5.3L V10, sounds even better than the 4.8L engine.

Moeferd

heck yeah! had to take this to the front page...
https://www.clublexus.com/articles/l...rs-green-hell/

xbladex00

hey thats not an RC F front bumper.... Thats an RC bumpers... So does this mean the RC-F bumper isn't even aerodynamically better???

DOC4LEX

hi all that is not the RCF but the new RC200t Turbo that's why sounds a bit blant.As far as the LFA is concerned I think Code X is using a 5.3L V8 hybrid configuration.

05RollaXRS

Code X is actually a 5.3 Liter V10 officially. Simply a stroked version of the 4.8 Liter V10.

xbladex00

what are the figures compared to the 4.8 V10 from the original lexus?

05RollaXRS

It has air restrictors on it because of regulations so it is limited to 500 PS and is over 3300 lbs. This is the same as the 4.8 Liter V10, but it makes more midrange torque and is less high strung. Although, it blows past GT3 Cup cars in acceleration despite having similar horsepower on paper and being heavier.

The Code X wheelbase is longer than the SP8 class 4.8 Liter V10 LFA. Therefore, it is more smooth in turns and less "twitchy" and eager to change direction and oversteer. Code X competes in the SP9 class.

Unrestricted, it must be somewhere in the ~ 630 HP range assuming it can at least make the same HP/Liter as the 4.8 Liter V10.

TF109B

Itd probably be closer to 700hp with the race fuel, exhaust etc. before restrictors cut it back. The 4.8L engine is a little underrated and detuned for the street as well. I think the Code X will be faster this year with more experience and work on it. Hopefully top-10! Btw, its entered in this weekend's VLN race.

xbladex00

I can only imagine that stripping most of the tech, sound, deadening, would remove a good amount of weight on the car... Making the car at a longer wheel base was probably a pain since the chassis is made of carbon fiber... How does making it longer oversteer more? due to more weight transfer? I think they should have made a special edition where the LFA comes with the 5.3 V10 and make some benchmarking numbers since most people find the car not as fast as todays cars... God i hope they make another LF-A...

xbladex00

hmm... i can only imagine how hard it is to tune this car... probably harder than your average sports car... Is there any modded LF-A's? I'm sure this car can handle a lot... What really makes me think is why didnt they make it a much more potent car... I know the car is perfect due to the balance in power and weight and feel but i suspected they could have done more too it...

05RollaXRS

Yeah, definitely a lot harder. Pretty much all of the LFAs are stock except wheels and maybe cosmetic mods. No engine mods at all. The 5.3 Liter V10 can plausibly make close to 100 HP more than the 4.8 Liter V10 in full street production trim. I could imagine LFAs with some minor mods like sticky race Cup 2 tires, exhaust, ECU tune etc. can add quite a bit, but no one seems to want to touch how it was tuned from factory.

The engine was built on principles of forged and lightweight components (lighter and smaller than the 2GR-FSE V6) and highest revs possible so the internals might be too light and the engine bay is very small with limited space so no space really to put any FI components on it.