upgrading CWP

[YokoAE86]

Hi Guys

ATM my corolla has a 4.3cwp. I will be changing my LSD soon and was wondering if it is a good idea to change the cwp to a 4.7 as well, as alot of people have this.

From my understanding, changing to a 4.7 cwp means faster acceleration but top speed will be reduced.

I have a stock AE92 4age in my corolla. What will i expect if i upgrade? If i am on the highway with a 4.7cwp, does this mean in 5th gear, the revs will be really high? I know there is a new 5th gear on sale on this forum.

What other pros and cons are there to upgraing to a 4.7 cwp? Is it worth it or do i just stick to my 4.3cwp?


Thanks guys

[Deuce Cam]

Your assumptions are correct. With 4.7 fd you'll see roughly 4300 rpm @ 65 mph, tire size depending (that's where I'm at with 195/50 tires). With the 4.7 you'll always be roughly 300-400 rpm higher at any given mph compared to a 4.3. As a result I'm usually shifting @ 3500-4k rpm when accelerating up to speed. First gear is CRAZY short. It's a blast though.

If the car is your daily it might be hard to live with, but it really depends on the person. If you drive the car on the highway a lot I'd stick with the 4.3, or plan on buying the mfactory t50 5th gear to go along with the 4.7. (I have the mfactory gear but haven't installed it.)

[phanist]

i agree with Deuce
and gas milage is a bit poor too.

[ga_goosh]

you can get the same effect by changing tire size. if you run a 185/55/14 or 195/45/15 tire it will be the same as changing to a 4.5 final drive ratio.

[phanist]

I'm running 195/50/15 tire with 4.778 weir R&P
And my speed odometer reading is 9miles higher then my actual speed...