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why is the 4.0 not more powerfull

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Old 02-17-08, 10:12 AM
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over40driv
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Default why is the 4.0 not more powerfull

I was just on intellexual.net looking at the spec. differences between a 92 SC300, and my 400. I am considering buying the 300 because it is a non-moonroof. I am amazed that the 4.0 v-8 is only 25 more h.p. than the 3.0 six. Dosent seem fair to the v-8.
Old 02-17-08, 10:19 AM
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vwynn
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the 1uz engine was built to for durability and reliability. not for power =/
Old 02-17-08, 10:22 AM
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over40driv
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I hear what your saying, but the 3.0 is surely reliable as well. The 4.0 is a full liter bigger.
Old 02-17-08, 10:29 AM
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kyoso23
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A peak HP rating isn't everything. A flatter and fatter torque/hp curve, and the refinement of the 4.0 make it a very different animal. Designed to go for 300-400k without any major work, it runs much smoother than an I6 can, yeilds about the same mileage, and on the street is much quicker (although not it's not really very fast either).
Old 02-17-08, 10:29 AM
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Jewcano
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Exactly what Vincent said. The 400 is HIGHLY underpowered, which allows it to last HUNDREDS of thousands of miles without any major maintenance.
Old 02-17-08, 11:03 AM
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It has massive potential and its finally being unlocked. If you are comparing 2jz to 1uz, its apples to oranges. Stock the 1uz is better IMO. Smoother, better power curve etc. But since the 2jz has such potential (thanks to the Supra) you can turbo it for not much dough and get huge power out of it. 1uz is slowly making its way (very slow) but people are starting to do more to them. The motor is cheap and its a smooth v8... turbo or supercharge, whatever, you'll get some power.
Old 02-17-08, 11:08 AM
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over40driv
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Well Im trying not to freak-out over the 300 with the hardtop. Its an older car than my 95, and from what I catch, doing the 2jz turbo has its share of problems and investment. Also it is an auto. car, so Im considering the options.
Old 02-17-08, 11:31 AM
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The 1UZ is definitely underpowered...And for all of the reasons that have already been stated above...But consider that it came out in 1992, that was 16 years ago...It was considered quite powerful at that time...And as stated, it's potential is just now being explored in the states...But, even though the 2JZ and the 1JZ have bolt on parts, they still cost quite a bit to turbo for any massive power gains...The power coming out now rivals the 60's when American muscle ruled the streets, and gas was $0.25 per gallon...Take a look at what the 1UZ was at the time, and it was a real marvel of engineering.

Some of us are now taking it to the next few levels...And it can be a well engineered beast!!
Ryan
Old 02-17-08, 11:57 AM
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i just don't like how the red line is so low in the 1uz i wish it was at at least 7k + there hardly any parts past bfi exhaust and safc. i just wish more companies would pick up and experiment with the engine. ( shout out to tanabe for ur controbutions) i am sure this engine has tuns of pontential to unlock far past the 1 or 2 jz
Old 02-17-08, 12:01 PM
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Originally Posted by t70 supra
i just don't like how the red line is so low in the 1uz i wish it was at at least 7k + there hardly any parts past bfi exhaust and safc. i just wish more companies would pick up and experiment with the engine. ( shout out to tanabe for ur controbutions) i am sure this engine has tuns of pontential to unlock far past the 1 or 2 jz

You have to look, but curently you can get ahold of these parts (from the top of my memory)

Intake
Exhaust
Headers
Supercharger (Centrifugal and Roots)
Turbo (in the works)
Engine Management
Forged Internals
Metal HG's
Cams
Valves
Valve Springs
ITB's
Manual Conversion (5 and 6 speed)
and misc parts can be adapted easily.

You just have to know where to look. Remember this car is big in Australia
Old 02-17-08, 12:06 PM
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mr2man07
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mmm a itb, cammed and 6 speed 1uz.

i can only dream
Old 02-17-08, 06:19 PM
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Originally Posted by mr2man07
mmm a itb, cammed and 6 speed 1uz.

i can only dream
sorry i am not rich like the rest of these people i am a poor college student so i can ony afforid basic mods i did not forget what u u added to the mix but most peope are not going to add a new tranny i thought about who hasnt but i the end i have my gir to thin about and she cant drive a lexus manual just my auto stick lmao bt really all i want is a higher revline cause i know once i start adding cams il be back in another supra
Old 02-17-08, 06:31 PM
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The 3 litre I6 (2jzge) engine was overpowered for its time. It had 220hp/220lb, which is pretty much unheard of, in its time. The NSX, which was considered a supercar, produced 270hp out of a 3.0L engine, with 210lb torque - and that power was made at high RPMs, and it had VTEK, while the 2JZ has much more linear power curve. Production cars with 6 cylinder engines displacing around 3 litres back then produced around 150-180hp.
Old 02-17-08, 06:38 PM
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Jewcano
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Our engine with a delicious set of ITB's
http://youtube.com/watch?v=Ba8sT2BQ4uc
Old 02-17-08, 07:09 PM
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mr2man07
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ooo man i still remember seeing that a while ago. that thing is amazing.


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