Today I was trying to time my 0-60 time with a friend and I accidentally shifted from 3rd to 2nd at 7k RPM. I've never done this before but I think since his arm was rested on the middle part, I was leening more to the driver side or something. Anyway, I almost cried when I did this and pulled over the car right away and let it idle for like 5 minutes. I drove slowly all the way home without pushing it and let it idle 5 minutes in the driveway with the hood up to cool off better before turning it off. The engine is street ported with 3mm seals and was rebuilt 8k km ago for the first time. I'm really scared I took a chunk out of its life. Since it was a one-time thing, how bad is it? Is there anything I can do besides not doing it again?

thewird

 

If there are no symptoms, I'd say you cheated death.

 

Yes, I forgot to mention everything seems to run fine but as I said I didn't try to push it to much. Basically kept it from boosting the whole way home. I'll try tomorrow and see if it acts the same with boost.

thewird

 

So I guess I'm in the clear and extremely lucky then?

thewird

 

Can I ask how old you are? Because every single post you've ever made indicates either a REALLY young person or someone who just doesn't know squat about cars. This is not an attack, I just have to ask and would recommend you reading everything you can about these cars.
As for hitting 2nd instead of 4th, what EXACTLY happened? I mean, did you hit 10K or more or something? Was it momentary? It is VERY hard to blow a rotary engine by over-revving and keep in mind that rotor speed is 1/3 crankshaft speed.
Hell....I once shifted a Chevy Vega from 4th to 1st when meaning to go to 3rd, locked the rear wheels up, spun around a full circle and somehow kept going in a straight line.
If your car is running fine, it is fine. You pretty much either kill it or not in these situations.

 

What were you doing looking for fourth doing 0-60 times? Lol you don't even need 3rd for that!

And changing from 3rd to 2nd is no problem at all. Rotarys rev forever and ever, seriously she will be fine dude - not a problem at all. I bet it sounded awesome

 

Yes, I am probably young by RX-7 owner standards. I am 21. I don't know much about cars so thats why I sound so noobish. I've been reading about the RX-7's for 1-2 years before buying my car. Anyway basically I was in 3rd at 7k RPM because thats where I roughly shift when flooring it so whatever 7k in 3rd equals in 2nd is what i overevved to, 9-10k maybe? I heard the tires spin and then looked at my rev thing and realized what I did and emediatly pushed the clutch and pulled over. So it was in the red for maybe 0.5-1 second. I've read on the internet rotary's can rev pretty far so thats a consolation but I've also read that they start to wear at 6-8k so conflicting information. To answer BobfisH question why I was in third is because I kept going even after the 0-60 time finished. Anyway, thanks for your response and It's good to hear that its most likely fine.

thewird

 

Something like that, if anything was going to give way, it probably would of done it immediately, so driving around and giving the motor extra cooling attention after you got home was not neccessary.....neither was freaking out.

You should of felt something was wrong before you had completely engauged the clutch, unless of course you were just dumping the clutch in between gears.

 

You're immediate action would be...?

 

I know it's not exact but at Sevenstock 9, they did this Q&A with the Sylvain Tremblay and David Haskell of Speedsource Engineering that build most of the Mazda race engines. Of course they're using the new RX8 engine but they said they shift at 8500 but have tried higher rpms (9-9.5-10k)

In my book the FD 13B is a better engine and should be able to handle what you reported.

Carry on..

 

If it idles smooth you are fine.

I used to run a streetported 13b in a fist gen that I would take to 10,000 plus rpms EVERY DAY, multiple times a day. I put well over 120,000 miles on the engine before a rebuild.