1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

2nd gen plug usage in a 1st gen question

Thread Tools
 
Search this Thread
 
Old Nov 4, 2007 | 12:57 PM
  #1  
yetterben's Avatar
Thread Starter
7less for now!
Tenured Member 10 Years
 
Joined: Oct 2007
Posts: 1,372
Likes: 0
From: eau claire
2nd gen plug usage in a 1st gen question

Can the 86 plugs be used in are 1st gens for a better burn???? thought i read somewhere they can be and i cant seem to find 1st gen plugs in my town anyway?
Reply
Old Nov 4, 2007 | 02:51 PM
  #2  
bliffle's Avatar
Rotary Freak
Tenured Member 10 Years
 
Joined: Sep 2002
Posts: 2,815
Likes: 0
From: SF BayArea
You can order plugs online at sparkplugs.com, only takes a couple days to get them. Consensus opinion is that NGKs are best, and you can try both BR8EQ14 (hot) and BR9EQ14 (cold). Check it out. About $6 each.

Another club member recommended Autolite 2626 plugs because they are harder to flood and foul. About $3 each, and they have the same dimensions as NGKs. I don't know if they'll last longer, so what I decided is to have both NGKs and 2626s, new, handy, then replace them with the opposite brand when they fouled and I changed plugs. So far I've thrown out a lot of NGKs and no 2626s, so I think they're working good. In fact I've gotta order some 2626s pretty soon.

YMMV.
Reply
Old Nov 4, 2007 | 03:10 PM
  #3  
yetterben's Avatar
Thread Starter
7less for now!
Tenured Member 10 Years
 
Joined: Oct 2007
Posts: 1,372
Likes: 0
From: eau claire
just wondering casue i hav a set of new ones for my old 86 will they work is the main ? and to kinda change subject do they sell electric wp's for are cars
Reply
Old Nov 4, 2007 | 03:49 PM
  #4  
diabolical1's Avatar
Moderator
Tenured Member: 20 Years
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Feb 2002
Posts: 10,998
Likes: 349
From: FL
for a better burn? try the NGK B8ES or BR8EIX.
Reply
Old Nov 4, 2007 | 04:33 PM
  #5  
yetterben's Avatar
Thread Starter
7less for now!
Tenured Member 10 Years
 
Joined: Oct 2007
Posts: 1,372
Likes: 0
From: eau claire
? remains will they work or am i gonna hit a rotor
Reply
Old Nov 4, 2007 | 04:47 PM
  #6  
diabolical1's Avatar
Moderator
Tenured Member: 20 Years
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Feb 2002
Posts: 10,998
Likes: 349
From: FL
yes.
i've never used them, but i'd imagine he's saying yes.
and yes.
Reply
Old Nov 4, 2007 | 04:55 PM
  #7  
yetterben's Avatar
Thread Starter
7less for now!
Tenured Member 10 Years
 
Joined: Oct 2007
Posts: 1,372
Likes: 0
From: eau claire
so they will work then without damage? Thanks for the help
Reply
Old Nov 4, 2007 | 06:02 PM
  #8  
Roundabout's Avatar
Village Idiot
Tenured Member 20 Years
iTrader: (8)
 
Joined: Jan 2002
Posts: 1,081
Likes: 1
From: Duluth, MN
I've been running 2nd gen plugs in my 12a since I bought the car. No issues.
Justin
Reply
Old Nov 4, 2007 | 06:41 PM
  #9  
yetterben's Avatar
Thread Starter
7less for now!
Tenured Member 10 Years
 
Joined: Oct 2007
Posts: 1,372
Likes: 0
From: eau claire
wow thanks man. thats all i really wanted to know. i have the trailing and leading ones. Just wanted to use them up since they are expensiv little buggers. thanks all for the input!!!! Now about that electric water pump????
Reply
Old Nov 4, 2007 | 06:54 PM
  #10  
bugman1973's Avatar
advanced novice
Tenured Member 05 Years
 
Joined: Aug 2006
Posts: 1,073
Likes: 1
From: clarksville tn
i use all second gen plugs in my first gen fit perfect the housings are perfectly made for the plugs
Reply
Old Nov 4, 2007 | 09:16 PM
  #11  
Rx-7Doctor's Avatar
Lives on the Forum
Tenured Member 10 Years
iTrader: (13)
 
Joined: Jul 2004
Posts: 10,584
Likes: 12
From: Oregon
Originally Posted by yetterben
Can the 86 plugs be used in are 1st gens for a better burn???? thought i read somewhere they can be and i cant seem to find 1st gen plugs in my town anyway?
Are you carb'd or FI?
Are you running the stock coil or the 2nd gen leading coil setup?
Reply
Old Nov 4, 2007 | 10:38 PM
  #12  
yetterben's Avatar
Thread Starter
7less for now!
Tenured Member 10 Years
 
Joined: Oct 2007
Posts: 1,372
Likes: 0
From: eau claire
stock carb switching to the direct fire setup with some blasters soon
Reply
Old Nov 4, 2007 | 10:51 PM
  #13  
Rx-7Doctor's Avatar
Lives on the Forum
Tenured Member 10 Years
iTrader: (13)
 
Joined: Jul 2004
Posts: 10,584
Likes: 12
From: Oregon
Remember that the 2nd gen plugs are 7's and 9's. Where the heat range for the stock 12a is 8"s.

If most of your driving is highway or spirited then run the 9's in the leading and the 7's in the trailing.
If you do normal driving or stop and go and city driving then use the 7's in the leading and the 9's in the trailing.
You will get better mileage with the direct fire set up.
I got a minimum of a 3 MPG increase when I switched just to the 2nd gen leading coil.

Wehn I recently took off my 2nd gen leading coil and ran the stock coil and left the 2nd gen leading plugs I went from an average of 26.9 MPG combined to 22.9MPG.
My mileage on that particular run should of been around the 27.5 mark because it was a 100 mile test with approx 7-8 miles only of intown driving.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
Jul 1, 2023 04:40 PM
mustanghammer
Race Car Tech
28
Nov 22, 2015 07:10 AM
alphawolff
1st Generation Specific (1979-1985)
17
Nov 17, 2015 05:57 PM
craaaazzy
Comments and Suggestions Archive
3
Aug 21, 2015 02:00 PM
Marty RE
New Member RX-7 Technical
0
Aug 13, 2015 11:19 AM




All times are GMT -5. The time now is 06:39 PM.