I just bought a 84 with the 12 A and it is running 4000 rpms at 70 mph i was just wondering if that was normal

 

Roughly,yea.

Worn out tires will affect it a little,but 4K is nothing for a rotary.....thats where they start to sing!

 

4k thats childs play for a rotary! lol

But yes I run about the same at those speeds.

 

Welcome to the forum and the Darkside. You get the usual sig line with a link to the online FSMs and other rotary related materials. Enjoy.

 

I belive the diff gearing is a little different between S2 and S3, but I'm at 3,400rpms or 3,500rpms at 70mph

 

4th at 70 = 4,000
5th at 70 = 3,500
85 Gs 5-speed

 

I dotn want to disclose what RPM my engines run with 4.44 (FB) and 4.88 (RX-3) on the freway. Its like having a speedlimiter.

 

Cruising on the freeway has my SA between 3500 and 4k in 5th gear.

 

Diff gears are all the same stock, 3.909, except for the manual SE diff, which is 4.10. Changing tire sizes/diameters makes more of a difference than anything else.

 

No you're wrong it's his muffler bearings. You need to change 'em soon! Here's what mine looked like.

 

WTF Mate!

 

He likes to toss that pic up every so often, The surgical gloves are a nice touch. Adds a bit of proffesionalism and authenticity to a very old joke.

 

I thought that was my joke. Now I have to find a new one..

 

You in 4th or 5th gear? Either way its close, but 5th should be around 3400 RPM or so.

 

ah, thats what I was thinking of, I was close, but no cigar.

 

it has bigger wheels then stock i cant remember what size though. thanks for the help....i uh liked the muffler bearings thing that was a good chuckle

 

4k for me is about 80-85mph. When I moved here to ID, from about an hour north of Salt Lake City all the way to Boise my tach never dropped below 4k. averaged about 90 LOL. About 3500-3600rpms is when the secondaries open up so if you keep it just under you'll get the best fuel economy

 

i think whoever had my '83 before me put a new transmission it, im exactly at 4k at 80mph