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

What battery for an old 12 A?

Thread Tools
 
Search this Thread
 
Old 11-19-23, 03:43 AM
  #1  
Junior Member
Thread Starter
 
IGRIDYX's Avatar
 
Join Date: Jun 2023
Location: France
Posts: 18
Likes: 0
Received 1 Like on 1 Post
What battery for an old 12 A?

It appears que mine struggle to make my RX to start. The starter motor turns too slowly and my battery is discharged in 3 or 4 attempts at around 12.3 volts. It's impossible to get enough power to start the car then. Yet it's a 70 amp but with 600 A (maybe too low on that). The coils are new. What do you suggest I check or change? Thanks.
Old 11-19-23, 02:13 PM
  #2  
Moderator

iTrader: (3)
 
diabolical1's Avatar
 
Join Date: Feb 2002
Location: FL
Posts: 10,819
Received 307 Likes on 268 Posts
well, you can:

1. try to jump it with another car, or
2. take the battery and have it tested, then either charge or replace it, as needed

as far as what battery to get, i could tell you 24F, 26R or type 35 - but i honestly have no idea if those numbers mean anything in France. you're probably better off going to your local auto parts store and asking.
Old 11-21-23, 03:20 AM
  #3  
Junior Member
Thread Starter
 
IGRIDYX's Avatar
 
Join Date: Jun 2023
Location: France
Posts: 18
Likes: 0
Received 1 Like on 1 Post
I replaced the starter, which was weak, and the spark plugs and coils are okay. But the car still won't start. I still have to check the ignition (I don't know the exact name: breaker point ignition system?) since the car dates from before 1980 with the original system. Has anyone ever modified it with an electronic ignition? Do I need 2 units since it's a dual ignition? In short, how do you do it?

Last edited by IGRIDYX; 11-21-23 at 03:25 AM.
Old 11-21-23, 07:19 PM
  #4  
Moderator

iTrader: (3)
 
diabolical1's Avatar
 
Join Date: Feb 2002
Location: FL
Posts: 10,819
Received 307 Likes on 268 Posts
here you go ...

https://www.rx7club.com/1st-generati...please-977306/

Old 11-23-23, 03:11 AM
  #5  
Junior Member
Thread Starter
 
IGRIDYX's Avatar
 
Join Date: Jun 2023
Location: France
Posts: 18
Likes: 0
Received 1 Like on 1 Post
It might be hard to find and expensive away from the USA. I was thinking of an alternative DIY solution.
I'd especially like to know whether you need two electronic modules or not (one per coil).
Old 11-23-23, 06:11 AM
  #6  
Rotoholic Moderookie

iTrader: (4)
 
vipernicus42's Avatar
 
Join Date: May 2002
Location: Ottawa, Soviet Canuckistan
Posts: 5,962
Received 30 Likes on 24 Posts
Have you replaced your battery cables? The stock ones tend to corrode over time and have trouble passing enough amps to crank the starter very quickly. I replaced mine and the difference was incredible.

You won't find a place where you can just buy a pre-made replacement cable for our cars. So I just bought some bulk copper cable at the car parts store, some battery clamps, some crimp-on copper loops and made my own. It was surprisingly easy. Something like this for the battery clamps:
​​​​​
Amazon Amazon

And this for the crimp-on copper loops:
Amazon Amazon


You can use a larger wire gauge too. I think I went with either 1/0 AWG (8mm diameter) or 2/0 AWG (9mm diameter) - my car is in storage for the winter so I can't check.

Cheers,

Jon

​​​​

Last edited by vipernicus42; 11-23-23 at 07:32 AM.
Old 11-23-23, 09:15 AM
  #7  
Junior Member
Thread Starter
 
IGRIDYX's Avatar
 
Join Date: Jun 2023
Location: France
Posts: 18
Likes: 0
Received 1 Like on 1 Post
Ok Jon, but I was talking about adding an electronic ignition module to my breaker point system.
I need one module for both coils or one for each coil? By the way I gonna check battery wires. But
I think my battery is not very good.
Old 11-24-23, 08:14 AM
  #8  
Junior Member
Thread Starter
 
IGRIDYX's Avatar
 
Join Date: Jun 2023
Location: France
Posts: 18
Likes: 0
Received 1 Like on 1 Post
Here, is what I am talking about. I have used of it to bypass the breaker point on some old 4 cylinders engine, but with only 1 coil. The question is: for a 2 coils rotary engine ignition, I suppose that I need 2 of them..?

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
PsikoticPersian
2nd Generation Specific (1986-1992)
2
10-05-04 11:35 AM
cblake3
2nd Generation Specific (1986-1992)
7
04-21-04 11:20 AM
dkRX20
2nd Generation Specific (1986-1992)
4
11-23-03 11:33 AM
clarksonrx7
1st Generation Specific (1979-1985)
3
10-03-03 05:15 PM
sheaa
3rd Generation Specific (1993-2002)
6
12-27-02 11:57 AM



Quick Reply: What battery for an old 12 A?



All times are GMT -5. The time now is 06:48 PM.