Im curious about the 4.3 in our LS430s
12-10-13, 01:14 PM
#1
Im curious about the 4.3 in our LS430s
In what other vehicles outside of Lexus did Toyota employ these engines? Where they used in any SUVs or track/racing vehicles? I know by todays standards the our 4.3 is somewhat outclassed by many other motors but to me, it still feels like the engine could still run with the best of them. 290hp is now standard in the mid-size sedan class but the 317ft lbs of torque is a handful to over look.
12-10-13, 01:54 PM
#2
The 3UZ-FE, is a 4.3 L (4,292 cc or 261.9 cu in) version built in Japan. Bore is 91 mm (3.6 in) [1] and stroke is 82.5 mm (3.25 in). Output is 216 to 224 kW (290 to 300 hp) at 5600 rpm with 441 N·m (325 lb·ft) of torque at 3400 rpm. It has an aluminum engine block and aluminum DOHC cylinder heads. It uses SEFI fuel injection, has 4 valves per cylinder with VVT-i. In 2003, the engine was linked to a six-speed automatic in applications with improved fuel efficiency.[1]
A 4.4L version replaced the 3S-GTE as the engine used in Toyota's 500 hp (370 kW) Super GT race cars up to 2009[citation needed] and a 5.0L version was used in the Grand American Road Racing (Grand Am) Series.[7]
Applications:[1]
Lexus LS 430
Lexus GS 430
Lexus SC 430/Toyota Soarer
Toyota Crown Majesta
Super GT
Toyota Supra GT500 Race Car
Lexus SC 430 GT500 Race Car
http://en.wikipedia.org/wiki/Toyota_UZ_engine
A 4.4L version replaced the 3S-GTE as the engine used in Toyota's 500 hp (370 kW) Super GT race cars up to 2009[citation needed] and a 5.0L version was used in the Grand American Road Racing (Grand Am) Series.[7]
Applications:[1]
Lexus LS 430
Lexus GS 430
Lexus SC 430/Toyota Soarer
Toyota Crown Majesta
Super GT
Toyota Supra GT500 Race Car
Lexus SC 430 GT500 Race Car
http://en.wikipedia.org/wiki/Toyota_UZ_engine
12-10-13, 06:44 PM
#4
Lexus Champion
In what other vehicles outside of Lexus did Toyota employ these engines? Where they used in any SUVs or track/racing vehicles? I know by todays standards the our 4.3 is somewhat outclassed by many other motors but to me, it still feels like the engine could still run with the best of them. 290hp is now standard in the mid-size sedan class but the 317ft lbs of torque is a handful to over look.
I love how torquey it is; you can take off from a light and still stay ahead of traffic without even going over 2200RPM lol. When you do push it though it screams and sounds like ripping silk while giving you the high rpm horsepower rush. Not to mention it's about the most bulletproof, sturdy V8 you can buy.
12-10-13, 07:37 PM
#6
This motor is also the same 4.3 L just bored out to 4.7 that is fitted on the Toyota 4runner and lexus gx as we'll as sequoia. That 4.7 does the 0 to 60 in low seven seconds for the 4runner which is a 4700lb car with full time AWD!!!
12-10-13, 07:40 PM
#7
The 2UZ was used in most of the Toyota/Lexus SUV's and the Toyota Tundra. The 1UZ was used in the SC400, LS400, and GS400. The 1UZ and 3UZ were also in the legendary Toyota Crown as well.
The UZ engines were pretty solid engines considering how long Toyota has used them.
The UZ engines were pretty solid engines considering how long Toyota has used them.
Last edited by Kira X; 12-10-13 at 09:18 PM. Reason: Forgot to add the legendary Toyota Crown D:
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12-10-13, 09:05 PM
#9
Moderator
The 3UZFE LS 4.3l V8 is an amazing motor - powerful but smooth as silk, and bullet proof reliable.
The racing engine derived (6 bolt mains and over square bore/stroke design) 4.3 V8 in the LS is an all aluminum engine including the heads and block. Other large Toyota V8s used in its SUVs and trucks use a cast iron block.
Toyota/Lexus also developed an all aluminum version of the UZ motor to power small aircraft but not sure if it ever was put into production.
The racing engine derived (6 bolt mains and over square bore/stroke design) 4.3 V8 in the LS is an all aluminum engine including the heads and block. Other large Toyota V8s used in its SUVs and trucks use a cast iron block.
Toyota/Lexus also developed an all aluminum version of the UZ motor to power small aircraft but not sure if it ever was put into production.
Last edited by Jabberwock; 12-10-13 at 09:09 PM.
12-11-13, 09:52 AM
#12
I know I'm in the minority here, but I would have preferred had Lexus made the engine to have more torque down low or geared the rear end differently. It's a quick car, but I find you really have to lay into it to get it moving.
My wife has a Lexus GX 470 and its geared MUCH better to the type of driving I do. The torque is right off the line, it just feels like it has a lot more pep (even though the LS is faster once it gets going).
I love a car that has that feeling of effortless torque right off the line, that's why most people buy a car with a V8. I know the European way is power in the upper RPM, but I prefer the more American style of torque down low.
My wife has a Lexus GX 470 and its geared MUCH better to the type of driving I do. The torque is right off the line, it just feels like it has a lot more pep (even though the LS is faster once it gets going).
I love a car that has that feeling of effortless torque right off the line, that's why most people buy a car with a V8. I know the European way is power in the upper RPM, but I prefer the more American style of torque down low.
12-11-13, 10:41 AM
#14
When the 1uz was built, it was tested and approved for automotive AND aviation, so it really was a special engine, and the 3uz would be the newer and improved version of that.
You wont find your average engine being approved for use in airplanes and aircraft.
I know I'm in the minority here, but I would have preferred had Lexus made the engine to have more torque down low or geared the rear end differently. It's a quick car, but I find you really have to lay into it to get it moving.
My wife has a Lexus GX 470 and its geared MUCH better to the type of driving I do. The torque is right off the line, it just feels like it has a lot more pep (even though the LS is faster once it gets going).
I love a car that has that feeling of effortless torque right off the line, that's why most people buy a car with a V8. I know the European way is power in the upper RPM, but I prefer the more American style of torque down low.
My wife has a Lexus GX 470 and its geared MUCH better to the type of driving I do. The torque is right off the line, it just feels like it has a lot more pep (even though the LS is faster once it gets going).
I love a car that has that feeling of effortless torque right off the line, that's why most people buy a car with a V8. I know the European way is power in the upper RPM, but I prefer the more American style of torque down low.
I bet if you swapped out the auto for a different auto tranny or a 5 speed manual, you would find it has more then enough torque.
(sits back and day dreams about a 5 speed LS , mmmmmmm)
12-11-13, 12:02 PM
#15
Well all this is good to know! I was just a lil curious about how good of a motor we had. Other than power output, how much better is the 4.6 used in the 460s? Fuel consumption? Smoother/ quieter? I know they had the recall thingy but that's not a design flaw. Just manufacturing.