As lightly discussed here, what's preventing Lexus from using the 5.7 liter engine in a GS? Of course, it would be tuned a bit differently... But why not?

 

....Its a truck engine..for starters.

The 4.6 makes just as much horsepower, and only 33ft/lbs less torque.... which would go quite unnoticed in a vehicle that is about 1300lbs lighter.

I'm pretty sure also that the 5.7 is bigger, heavier and thirstier....so they real question would be 'why?' as opposed to 'why not?'

 

engine size is only one of the variables in performance and whether it's good for a car in many perspectives

 

First, that engine is too big (and wrong) for the GS body.

Second, I would rather have the GS lighter with a turbo/super-charged engine instead of a heavier engine. GS-F, anyone?

Third, the GS would need major modifications to adjust to such an increase in power. I can't wait to see the outcome of the GS460...

 

Toyota needs to bring back forced induction for sure.

TT 3GS anyone?!

 

Why? GS-F is supposed to get the V10 right? A TT 3GS would push it far outside the price range that an already poor-selling car is competing in.

 

As everyone has mentioned, the 5.7L is a truck motor and it will not fit into the GS engine bay. Also, the 4.6L makes just as much HP and almost the same amount of torque. The 4.6L is a smaller, lighter, and more fuel efficient engine.

 

Not sure about pushing the price range far outside but anyways, the reason for a TT is because I'm sure you know that it'd take a fraction of cost to get more power out of an FI engine compared to an NA engine. And for any performance enthusiasts (prospective buyers of GS-F), that's the essential goal.

I hope that Toyota brings back TT Supra and then uses that engine on various Toyota/Lexus vehicles, that would be so exciting.

I was disappointed when the S4 went V8 just for example and I'm so excited about the TT BMW's right now!

 

Well, my latest theory is the GS 460/LS 460 will be around about 3 years and become the GS 500/LS 500 as they make the switch from the 4.6 to the bigger but detuned 5.0 liter V-8 used in the LS 600h L.

5.7 won't fit in any Lexus car.