I am newbie to tyhis iste and i dont want to offend anyone. I just had a question about my Rx7 taht i just got from a friend. This car the guy had for 1 years. It haven't been driven for a while. They guy could not afford the insurance. So i paid the guy and bought the car off him. The car runs great. bUt the a problem withj it. When i am at high RPM like racing with it. The rpm around 6500 and shift gear i dont know why it shoots out blue somoke for that litle instance. I dont knwo why it is doing that. Just that time when shifting gear it does that. All you rx7 expert cna help me with this. I dont knwow what the prblem can be. In my opinion it might be that car has been used in past year. If i start driving it around more often it might could fix the problem
Sorry if I Flamed. Really could use ur expert experience and knowledge

 

i'm no expert but alot of rx-7's do that especially if you have an performance exhaust or no cats. it could also be that your apex seals are not seallin perfect anymore. i wouldn't worry about it until it smoke alot at high rpms when your not shifting.

my car does the same, but i have an exhaust system.
it only smokes a tiny bit between shift at 7500rpm +

 

yeah i have an exhaust system on my car. Preeety loud. Cna hear me down 1 mile The guy who i got the car from rebuild the whole car. I left the car same way. when i am on the highway and not racing or anything it dont shoot out smoke. But when i redline it shoot out smoke then.

 

I would say that your oil control rings are going.

 

How much would they cost me to replace.

 

Your looking at a rebuild it its the oil control rings, which could be 1k doin it by yourself or up to 2 or 3k if you have someone else do it. Are you sure its blue smoke and maybe not just black smoke?

 

Yeah it blue smoke, It only does it when i redline the car. Normal driving it don't do anything. Plus i checked my exshast. It don't have any cats.

 

Well blue usually means burning oil, so it could very well be your oil control rings going. Which would mean a rebuild is in order.