90,000 rule

[guaty]

I've been hearing rumors that rx-7 engines give out after 90,000 miles is that true? If it is why?

[89tracerman]

FD engines!!! TWIN TURBO yes
FC engines 13B if maintained they could probably reach 200K

[mcs]

would be expensive to keep it reaching 200k

[drftk1d]

Originally Posted by mcs

would be expensive to keep it reaching 200k

Yeah, since oil and filter changes are SO expensive

[FCsilvia]

FD engines tend to become fragile after 65,000 miles because of carbon buildup from large injectors and the twin turbo system.

FC engines are a lot better. turbo engines average around 120k to 200k. There's a big spread depending on how well the car was taken car of. Non-turbo motors are a whole different story. I've seen some go up to 400,000+ miles on the original motor and seals. Its all about maintaining the car well.

FD3S - twin turbo, 550cc + 850cc injectors
FC3S turbo - single turbo, 550cc injectors
FC3S N/A - non-turbo, 450cc injectors

[guaty]

fc silvia seems to know his stuff

[clydes270]

I have 225k on my 87 NA. I am getting about 22 mpg highway (19 city). 2000 mi oil changes.

[BrnOutKng]

200k? Thats Possible but like someone else said, Expensive.

[Soyo]

they are easy as crap to maintain.... if you can't keep it running then sell it to someone with more common sense than you because regular oil and filter changes are the basic needs along with the usual things after a certain amount of miles

[RedFC3S]

Originally Posted by Soyo

they are easy as crap to maintain.... if you can't keep it running then sell it to someone with more common sense than you because regular oil and filter changes are the basic needs along with the usual things after a certain amount of miles

exactly what he said

[Jims5543]

FC N/A = super reliable and not uncommon to see them get over 200k miles.

FC Turbo = very reliable when not modded. Once you start modding you shorten engine life. Stock? I have a friend that got 250K miles out of his. The only reason it blew is because he started modding it.

FD = Magority of its life it was beat on. The cooling system was inadaquate. The twin turbo's + the pre-cats wreck havoc on the engine. The rear turbo overheats thusly overheating the rear rotor housing leading to premature engine failure.

First mod to an FD? Downpipe wrapped in header wrap to get the heat away from the rear turbo.

FD's in stock form, unfortunatly, turned out to be unreliable.

Recomondations per Pettit Racing for ANY rotary car.

http://www.pettitracing.com/rx7/index.htm

The Following recommendations are intended to keep your car out of the shop and on your favorite road

#1. Always keep up with routine maintenance schedules as outlined in the owner's manual

#2. Upgrade your chassis and engine grounding points. (FREE kit with your first order.)

#3. Replace cooling system plastic air separator (A.S.T), well known for splitting in half with no warning causing massive coolant loss and overheating. Our very popular aluminum upgrade units are always in stock.

#4. Replace that dirty fuel filter!!! Countless premature engine failures are caused by a dirty fuel filter. Don't let this happen to you. Poor fuel quality also contributes to engine failures ALWAYS USE PREMIUM FUEL!!!

#5. Install a turbo boost gauge! This is the only way to be sure the turbos are working properly. We produce several kits. All are easy to install, and come pre-wired with detailed instructions.

#6. Use fuel lubricant. This has been proven to extend engine life at least 30%. See Protek-R for more information.

#7. Get a fire extinguisher!!! A must have for any vehicle...that way you will never need it! Our auto fire extinguisher installs in minutes and looks cool, too.

[Soyo]

JIMS!! We've missed you man! haha I haven't seen a post from you in forever! where you been?

[NuTbAgSaN]

^^ yeah its all the same stuff u should maintain on ANY car, u just get screwed over more if u dont do it with these.

[J-Rat]

My N/A went 212,000 on the original motor.. Just oil changes, etc..

[Jims5543]

Originally Posted by Soyo

JIMS!! We've missed you man! haha I haven't seen a post from you in forever! where you been?

Bah! I got really busy and really only had time to post on No Pistons. Then 2 Hurricanes hit where I live. My house is fine my office lost its roof. So I basically lost Sept. and Oct.

I will try to pass throught here more, although internet connections are sketchy since the hurricanes. I still have no access at work only intermitently at home.