i heard that you could use honda civic spark plugs in a rotary engine.. my plugs are really dirty and my car wont start. it turns over fine but wont fire. coils are all good crank angle sensor is good , i want ti try some regular plugs, i heard that it idles better, but it is bad for the motor. can anyone help me. or does any one want to buy a non running 1988 rx7 109,000 miles , great shape make me an offer, i want to buy a 240sx.

 

I would use the stock plugs. Even if the theads were right on the Civic plugs I believe you have to have a special thin wall socket to tighten them. I've never had a problem with the idle using the stock plugs.

 

The only idle problem you might have is if you're using plugs that are too cold. That might explain why yours are dirty. Use NGK BUR6EQ for leading, and BUR8EQ for trailing.

 

You cannot use piston spark plugs in a rotary. They will fail very quickly as they're not designed for the constant heat seen on the combustion side of a rotary.

 

You're off by 1.

Trailing BUR9EQ x2
Leading BUR7EQ x2

I went to my local Napa parts distribution center and paid $6.50 each.

To the original question: No.

RX7 spark plug...


Honda Civic spark plug...



Do you see a difference between them?

 

If you put a sticker on the bottom one it will add 40hp. Did I win the prize?

 

You heard wrong.
Do us all a favor and SHOOT the idiot who told you that.

What part of "NO" don't you understand?

There's a FOR SALE section in here.
I'd suggest to go post your FOR SALE ad in there.


BTW, you can use your Honda spark plugs in your 240SX now.
Good riddance.


-Ted

 

... WHAT... why would you even want to try that. Rotary plugs arent any more expensive than "Civic" spark plugs... just go with what your supposed to use.

 

Yeah, you probably should sell the 7 and get that 240. Some people just aren't cut out to be RX7 owners.

 

Very true, for "spirited driving" - I gave him the recommended "around town" plugs. The 7s and 9s may be too cold for him, and I have yet to hear of 6s and 8s being too hot for regular engines (though that conversation doesn't come up often). I believe the original plugs on stock RX-7s were the 7s and 9s you suggested, and they're probably the safest bet since we don't know how he drives. Having the insulation on the hot plugs crack is worse than harder starts and replacing plugs more often due to fouling.

In short: listen to Twofer! I should have listed both choices.

 

trust me rotary engines do not run very well with out the correct plugs in them

it just plain wont start, and if you can get it started it will miss like a bitch

 

the rotary plugs at car quest in my town cost like 46 buck for trailing and leading.

im not cut out to own a rx7? thats stupid. i like the car fine , it is being a pain and almost every part costs a ton more , cus no one has them , i wish my car was a turbo too because it is the slowest thing i have ever driven, I will defenitly get this car running again , im going to buy new nkg plugs the right ones ,

thanks for all of your help

ps....... why put automatic trans fluid in the bottom spark plug holes????? to create a seal or something??? thanks

 

Hopefully that's not $46 each! That sounds more like the total price for all four. Check Mazdatrix:
http://www.mazdatrix.com/ign-2.htm

They run about $10 each there.

From what I understand, the ATF trick is used to increase compression when seals get stuck "pushed in," like after a rebuild. Some builders glue various seals into their grooves so they don't pop out when the rotors are installed. Sometimes the seals get stuck with engine buildup. The ATF can increase compression long enough to get combustion going, knocking the seals loose, and letting the seals take over the compression job. I'm not completely sure though, so hopefully someone else can clear that up.