was cruising home yesterday 3k @ 80mph. At first i thought it was really high and shift at high rpm too compare to my civic, after owning another SC, it is normal.. i hope

 

iv got a r154 with a gs400 3.53 rear and sometimes i chill in 4th on the highway 5th would put me at low low 2k rpm's.

 

I might have to check into doing that in the future. 16mpg isn't cool. Hell I was getting 22mpg on the 1jz, I don't know what happened to the mpg's. also what was your finaly HP on the Dyno Matt?

 

For me:

Needles show:
2k at 50mph
3k at 75mph
4k at 100mph in 5th.
95 SC300 5-speed.

Do you all have non-stock tire/wheel sizes? Also, how hard is it to get the speedo recalibrated?

 

how does this, if it affect the speedometer at all?? is it still accurate?

good info

 

An Australian company makes the 'yellowbox' which can fix the speedo.

I haven't heard anyone mention why the inline 6 cars have the gearing they come with stock, but for those that don't know.

Lexus put the 4.10+ rear end gearing in these cars to help offset the power to weight ratio of the inline 6 cars. The inline 6 cars are actually too heavy to make only 220hp.

If you were to swap in a 3.76 diff on a non turbo 3.0, it's gonna be a total dog just about everywhere in powerband.

 

same here.

 

I have a W58 + SC400 rear end (3.92) and 70mph is about 3k. maybe even higher... it sucks for gas mileage and highway driving lol.

Thats how it is... put a 3.26 out of a GS400 if you want to get some crazy low RPMs.

 

Yea, that is high. I just checked what my rpms were. My 92 which is stock with the 4 spd auto is at 2825 rpm at 80mph. With the overdrive off it is at about 4000 rpm. Seems to me your overdrive must be in the off position. I would check that out.

 

now i am wondering,
93 sc300 auto, i just bought not to long ago, i run around 4200 at 80mph(yikes), everything seems stock, idles normal at 800 or so,
- does anyone know why?
- what can i do to troubleshoot?

 

i have a 93 5speed and im at 75mph at 3k rpms. running 245 40 18.

seems normal