hey all

recently i had checked my compression in my 88 fc and it seems the front rotor is tip top with 90 psi all around and the rear rotor has a measly 30 psi so is it possible to make my rx run off of one rotor so i can possibly get it going and possibly rev it up and heat that rear rotor up and possibly seal it better?

 

no...your rear rotor is toast that is terrible compression, rebuild the engine

 

nope if your down to 30 you gotta rebuild and i don't think 90 is even that great

 

my haynes says 85 is what the rotor should have, i was getting 90. so cant i just get it running on 1 rotor?

 

You'll just end up destroying the core. Get a rebuild.

 

--Gary

 

She'll run on one rotor, and even rev to 7K or more in neutral, but she'll run rough, get horrible gas mileage, won't idle without some help, and you'll have less than 1/2 the power you'd otherwise have...If you're insane enough to to run her on one, the less compression the other has, the better

 

and 85 in the manual is bare min on a PROPER rotary compression testor.

IF you drive on that blown rotor and have driven on it then you have/will toast the housings, rotors and god knows how much else you will destroy.

 

well damn, whats a decent rebuild kit thats cheap in price but good quality, or can someone point me towards a thread that tell aboot it?

 

you're looking at about $500 USD for a basic rebuild + more if you need a rotor and housings.

and that's not even changing the bearings or anything...

 

would it be more economical to buy a new/used engine?

 

hell...I was hoping to see a write-up on a 6A or 6.5B rotary engine...:p

 

lol

--Gary

 

500 for a rebuild kit? i keep seein like 900 where can i get one for 500 i might goi ahead and do it

 

Lmao..lol

 

500 is for the bare minumum... usually just the rubber gaskets...

a complete rebuild kit will cost you about a grand. (thats new oil seals, new corner seals, the apex seals, new sides seals, new springs for the aforementioned, new water seals, a new oil chain,

500 is what guys like me spend to rebuild a good running motor cause some idiot rebuilt it and didn't put new oil seals in the rotors and it smokes like hell... If the hard parts are not very old, you can reuse them, but EVERYTHING has to go back EXACTLY where it came from and it all has to be cleaned and checked. Its worth the time to same 500 bucks, but not if the hard parts are really old and worn, you'll just be wasting time.

my advice... it you are doing this for the first time.. you'd better get the full kit and replace EVERYTHING... because if you don't, you will spend three weeks with a dial caliper, a set of feeler gauges and a micrometer trying to seel if all the hard parts are in spec again... and if the engine has over 100k on it, its likely that they are not!!!!

ALSO.... most rebuild kits DO NOT INCLUDE rotor bearings andstationary gear bearings which i've ALWAYS found need replaced on high mileage engines, or the external gaskets

I get my hard parts from rotary aviation, their new apex seals are the bomb.... I piece together the soft seals, and gasketts from my Mazda dealer (i get a discount) and McMaster-Car.

 

And easier.

Believe me, running on 1 rotor is bad. The engine i'm rebuilding now was run on 1 rotor and the rotor and housing are worthless now.

 

I had to drive mine on one rotor for a bit (since the rear rotor blew in the middle of a highway onramp... no idea why). The rear rotor had zero compression, so it was a proper 1-rotor.

You don't want to do that. Really. It won't idle below 1000 RPM, revs very slowly, has no power (slip the clutch up to 30 or so), and is absolutely zero fun to drive.

-=Russ=-

 

One rotor you say? Hm...

 

I shook my head after reading the first post in this thread.

 

I want one of those! It'd be sweet on a gocart!!

 

You are paying $500 for a soft rebuild kit!? Ouch! You can get them for $160:

http://www.rotaryaviation.com/o-ring_kits.htm

-Joe

 

That's great and all, but maybe when you do your own engine rebuild though you'll find out about the other expenses and won't make insanely low quotes for a rebuild of any kind for $160 in parts... it will cost around 450-500$ for a soft rebuild no matter how cheaply you get the parts.

Unless you're gonna you know, put it back together with some high temp RTV or something... good luck with that.

--Gary

 

I guy in Sweden makes 6B kits, with only one rotor! Based on a 13B...

 

Care to list what the other $340 would be invested into? I'm seriously interested. BTW I already have 4 full size hydraulic car lifts and all the air tools I could ever need. I would like a list so I can price out whatever else I might need.

-Joe