[Supras] RPM vs. Speed

[Dan Gyoba]

Bill:

The 'NA comes with a 4.300:1 differential, and the overdrive on the W58 isn't as tall as the 
one on the R154, so yeah, the RPM sits a bit high when you compare to a lot of other cars.

This isn't really a problem, since the 7M-GE will generally do this happily for hundreds of 
thousands of miles.

To comment on other information here...  AFAIK, all of the NAs, automatic or turbo had the 
4.300:1 differential in it.  The "sport package" NAs also had a 4.300:1 differential, but it 
was limited slip, not open.  FWIW, All Canadian spec MA70s had LSD, even the NAs, where as 
that required the sport package option for the US spec cars. (This may be of interest to 
those looking for a 4.300:1 LSD for drag racing.)

So basically, it's normal for this car.

I'm now trying to get used to a LOWER reading on the tach at highway speeds.  ;)

> All this talk of speed brings to mind
> another question....Since we only have one of these cars ( so far....)
> we have nothing to compare it to, in similar vehicles. My son had the
> use of an Eclipse for awhile.  When he got back into the Supra, he was
> concerned that the rpm at highway speed was higher than the Eclipse.
> In fact, at 65 mph, it's higher than a 4Runner, a Ranger, most other
> passenger cars I have been in and is about the same as my old '87 Ford
> F150 pick-up, which could pull stumps. It's around three grand at 65
> mph. It's  an N/A, 1990 with a five-speed. Is this about the same as
> everyone else? I can't imagine that there is a mechanical problem, as
> the clutch seems fine. Anything else would just fail completely.
> Another question is fuel mileage: It always seemed low, before. That
> would be expected, with the condition the engine was in. We have not
> checked since the rebuild; but what does everyone else get...assuming
> we're not going between 85 and 140..... > > Bill