1990 Celica GT-S

300 RPM seems like the high side of the normal range. How did you verify that the speedometer was dead on accurate at 65 MPH? I assume you were if 5th gear? Are the transmission and differential original or replacements?

And, what's on the car for tires?

That would be lower RPM than my Supra if I remember correctly. But if your gas mileage and performance are good then I would think all is well either way.

Dan

I cannot say for sure if the transaxle has been replaced. I believe the engine was replaced.

I was running 56 seconds a mile thru a speed test section while running 65 mph. If my math is correct, then the speed is correct. I was running in 5th gear.

If they replaced the transaxle and changed the gearing then the speedometer gear was recalibrated.

Jack

205/50-15

Hmmm...that's the correct size....

I thought maybe they were replaced with a different sized tire the would throw the speedo off, but that is the proper size...

My dad has a 86 ST162 that runs at 3500rpm on the highway, this is normal for the cars with the GE motor. he has changed the motor and transaxle to a mid 90's JDM spec but before that it ran at about

3000rpm. if it's running well you should get close to 30mpg cruising on the highway with that RPM.

3000rpm is normal if you have a 3S-GE motor, it can be as high as 3500rpm if it has a JDM spec drivetrain. I think even the 5S-FE motor sits up close to that on the highway. They usually have a 4.1:1 diff and a 0.86:1 5th gear so the revs really sit up there.

While I think about it. The Celica normally have a 4.1:1 diff and a

0.86:1 5th gear. for a 205/50-15 tyre the outside circumference is 72.5 in which is ~874 revs/mile and you do about a mile per minute on the highway. so 874 x 4.1 x 0.86 = 3081RPM. so the 3000rpm indicated is fine.

Thanks to all for the info.

One more question. I believe they have replaced the engine. Where on the engine would I find the engine code?

thanks

Jack

HOLY CRAP! Talk about "Do the math"!

Thanks to all for the info.

One more question. I believe they have replaced the engine. Where on the engine would I find the engine code?

thanks

Jack

******* Look at the valve cover to see if anything is embossed, otherwise, it will be cast in the block somewhere on the side.

Yeah I was having a rain man moment

being a 1990 gts you will mostly likely have 2200 in the intake manifold. the engine serial number of remember correctly is under top radiator hose outlet on the back of the motor.

How much is a candy bar? ;)