ok so here is the thing. i know nothing at all about a rotary engine but a couple months ago a friend and i went out to the local junk yard and i got a 1982 rx7, after about 6 hours of working on it my friend got her running so im thinking he knows what hes doing with it. he says he thinks my apex seals should be fine (he hasnt actually taken it apart to check so im just hoping hes right) so then we get her home and after doing some minor work to her he has me buy a Carter AFB comp 600cfm carb....now im thinking going from stock 450cfm vacuum nightmare to a 600cfm simple system would be sweet. so i had a mounting plate made and while i was at work he put my new carb on. so when i got home he has a couple of tubes blocked off (with a small bolt!!!!) and its kinda leaking oil when we take her for a test drive. well he told me hes going to have it blocked off better when he gets back from his vacation but since he is gone i have kinda checked it out a little. come to find out my new car has a metering oil pump and needs to inject oil to keep the internal seals in good working order!!!!!!

SO HERE IS MY QUESTION...
will it actually be ok to take off my metering oil pump and block the port off or is that really as bad of an idea as i think it is??? if so how can i get around having to use the pump (i really would like to get rid of it if possible because the pump is in really bad shape and i dont want to have to buy a new one) or at least how can i hook the pump up to my new carb system????

rick

 

Most people that remove the Oil metering pump will run 2 cycle oil in the gas at about 125:1

If you dont add the oil to the gas then yes it will mess the motor up in a short time.

 

thank you rx7 nut. i would rather hook my oil metering pump up (would make life a little easier than pre mixing) but as i have no clue how i could do that i guess ill just block it off and premix until i can....thanks again for the help. and if you have any other advice to offer please let me know because i can use all the help i can get.

 

You could go with a 2 stroke resevoir and pump, I think Rotary Aviation sells them if I remember correctly. That would give you the best of both worlds, using 2 stroke without the hassle of premixing each fill up.

 

Premix is usually done at 1oz/gal.

Premix with the pump still on is 4oz/tank.

 

you by chance have the link to the res and pump link?

 

oh btw how big would my fuel tank be?

 

16.4 gallons

 

if you wanted to, you could get a resevoir and pump off a junk moped but I'm not sure how you would get the correct mix

 

thanks rustt.




im not sure where i could come up with stuff from a moped tho and besides i dont want to have to try to figure out how to get it to get the right mixture. id rather get somethign prefab that can bolt right up... but at least if it will put off the correct mixture i could probably drill a small hole into my air cleaner so that i could send a small hose up and into my carb main for the oil??? or could i send it directly into the manifold??? if so then i jsut have to come up with a pump and res that will pump the correct mixture.....mind you that i am working with a majorly tight budget.

 

if you have verry little money then a cheep and easey fix would be to get a 1" spacer to go under your carb. take 2 small tubes about 1/8" i think ( on mine i pulled the vac nipples off an extra carb) and you are going to drill a hole in the side of the spacer for each tube and tap the tubes in leaving about a 1/2" sticking aot so you can hook up your omp lines to them.

the holes need to be on the engine side of the carb and one going to each of the primary runners.

after you do this you will need it wire the leaver on the omp open all the way becaus your new carb wont operate the omp unless somone has modifide it to work the linkage.


i may havee some pics at home it you want.

oh..... and if you need to run the car befor you get this done...........PREMIX !!!!!!!!

 

yea i wont be able to work the linkage right, but if i open the pump all the way wont it run way too oil rich and not run right? as for pics that would probably help me. i did have an aluminum plate built for the carb to sit on my manifold so i could probably just have 2 small holes drilled in that.

also my metering oil pump looks in pretty bad shape, i may be able to take it apart and clean it but if not where can i get one for cheap?

 

I see the OMPs on Ebay a lot. Usually really cheap ($100-$200) considering the cost of a brand new one is "omfg did i read that wrong" level of expensive. Oh and don't forget to replace the o-ring. The last thing you want is a leaking OMP, its about the most difficult thing on the car to replace while the engine is installed.

 

if you wire the pump full open you will be a bit oil rich at idle. i have not done it. i made a linkeg for mine but others have done it.

ill get some pics when i have the carb off this weekend

 

When wiring the OMP, set it to the 9 o'clock position, not fully open. Yes, your oil consumption will go up, but it's not going to hurt anything.

 

well i hooked my pump back up today and its not working so i blocked it off untill i can get another one... ipremixed my gas and it ran for a bit then died and i couldnt seem to get it started again..ill try and start it again tomarow, if it wont start ill drain the premix out and start over see if thats wrong, but if not then im not sure whats going on unless me blocking off the system somehow messed it up.

 

how much oil did you put in??? if its around 1oz to 1 gal thats not your problem

 

well i kinda guessed at how much gas was in my tank. i know that was kinda dumb but oh well...anyway looked at my plugs and they are fouled out so im jsut gunna buy more gas and premix it the correct way and hope that helps

 

ok so was messing with the rx yesterday and my guess as to how much gas was right so the mix is retty close, so my problem is im not gettign any spark, what could cause that?

 

How many miles did you run without oil in it ?

 

without oil was only about umm maybe 3 miles or so, we just wanted to test out how the new carb worked.

 

dos the trailing have spark? sounds like a bad ignitor or fuesable link. if you have spark to the trailing you can switch the leading and trailing ignitors and see if you get spark for a test. on an 82 i dont know if the ignitors are screwd on the side of the dizzy like on later modles

 

start simple, look for power to the coil, then move to the ignitor.

 

dizzy? ill check and see about spark to the trailing tho...i just hope my coil didnt give out or something

 

ok my coils are fine. so it must be my ignitor??? where is the ignitor located at and what does the thing look like?