Ultimate 1uzfe W58 Conversion Thread! (LOTS OF PICS!)
#77
Lexus Test Driver
One thing that really bugs me on this swap is when I surfed the Supra forum, many Supra guys said this W58 can only handle 350 rwhp with some abuse. And it can only handle around 400-500 rwhp when it's not hardly launched at stop. Well, if it can't be launched hard at dead stop, then it's not fun.
To find out if the R154 would fit, measure the height of a 1JZ bellhousing versus the 1UZ's plus the adapter plate. If the measurements are the same, shouldn't it fit? Just a thought . Btw, to mate an R154 to a 2JZ, I had to get a custom driveshaft. Would the same not apply here?
#78
well my tranny went out in my sc4 so im just gonnna try a swap it to manual.....one question......should i just buy this whole kit?.....
http://uza70.com/store/catalog/produ...products_id=46
http://uza70.com/store/catalog/produ...products_id=46
#79
well my tranny went out in my sc4 so im just gonnna try a swap it to manual.....one question......should i just buy this whole kit?.....
http://uza70.com/store/catalog/produ...products_id=46
http://uza70.com/store/catalog/produ...products_id=46
It is cheaper to buy the kit vs individual parts. PM'd.
#84
btw, what would be the difference in terms of power and torque when using the steel flywheel opposed to the aluminum one?
#85
Lexus Champion
iTrader: (-1)
Now, if the lightened flywheel will allow the rotating assembly increase speed more effortlessly, it will allow the rotating assembly to decrease speed more effortlessly as well. When coasting down a hill with the clutch disengaged, the addition of a lightened flywheel will make it more difficult to maintain one's speed (compared to the steel flywheel). Consider this same effect while cruising on the highway, the heavier flywheel will make the car able to maintain its speed more easily than a lighter flywheel, resulting in better highway mpg.
Another drawback to the lightening of the flywheel is that with less mass on the rotating assembly, it is more difficult to generate torque from a dig. Consider attaching a torque wrench to a tiny bolt on the inside of a radio versus attaching a torque wrench to a massive bolt attached to the frame of a vehicle. As hard as you want to push on that tiny bolt, it will only allow you to generate so much torque. On the other hand, the massive suspension bolt will allow you to lay into it with much measurable torque. Lightening the drivetrain will limit the amount weight used for leverage, making torque harder to come by. This is generally only an issue for towing and mudding applications, where low down torque is essential...and, of course, this effect can be overdone to the point wherer the car bogs down from the added mass.
That being said, the effect of altering the weight of the flywheel by a few pounds will not significantly effect the torque production of the motor (especially in a sturdy car behind a V8 with a heavy drivetrain). To boot, the negative alterations to fuel economy will also be insignificant. Well, at least these affects are often seen as minor drawbacks to a significant positive change in "revability," which translates to more fun behind the wheel. Being able to rev match more quickly and being able to rev through to the redline more effortlessly (once above, say, 2.5k rpm) is a significant advantage in terms of the performance aspects of the vehicle.
On the other hand, if you were adding a lightened flywheel to a Geo Metro in the hopes of more pep from a stop light and more fuel economy on the highway, you would be sorely disappointed as the car would need more revs to accelerate at the same pace in the low rpm range and the effect to highway fuel economy in a light car behind a 3 cylinder with a featherweight drivetrain would be noticeable.
In my opinion, don't break your budget to get the aluminum flywheel. The difference between it and the steel flywheel will not be a difference of 2-to-1 like the price would suggest. But, if you can afford it, then the positive effects of the aluminum flywheel will generally be enjoyed by the driver.
#88
Hey guys.
Yeah the adapter plate drawings are done... I need to get it cut, costs money... But its ready to go when I can afford to spend some money on it. Been a rough week on the car as far as wasting money.
Yeah the adapter plate drawings are done... I need to get it cut, costs money... But its ready to go when I can afford to spend some money on it. Been a rough week on the car as far as wasting money.
Last edited by RedPhoenix; 07-03-09 at 08:06 PM.
#90
Lexus Champion
iTrader: (-1)
The major difference in hp production by going with a manual will not be an increase in hp made by the motor but rather in increase in hp that is perceived by the driver because of the minimization of parasitic intertial and frictional losses in the drivetrain. While the motor will not be able to make any more power with the manual, less power will be lost along the way to the road, and -thus- more power will make it to the road. This is definitely a good thing.