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

Second gen wiring harness upgrade

Thread Tools
 
Search this Thread
 
Old 08-06-06, 02:38 AM
  #1  
Audio Cronic Syndrome

Thread Starter
 
blazer1313's Avatar
 
Join Date: Nov 2003
Location: Anacortes, WA Hometown: P.O., WA
Posts: 890
Likes: 0
Received 0 Likes on 0 Posts
Question Second gen wiring harness upgrade

Anyone know of anyone transplanting the S4 injection, injectors, and wiring harness (direct fire trailing and leading) to a GSLSE since its already injection. Yes I know you would have to switch over the intakes. I already did that. The point is I'd like the direct fire ignition and the ability to upgrade to a Power FC.

OR......

What do I have to purchase to get an MSD box and coils to run direct fire from them???? This would probably have to incorperate the 2nd gen crank positon sensor also

Last edited by blazer1313; 08-06-06 at 02:46 AM.
Old 08-06-06, 03:19 AM
  #2  
Super Moderator

iTrader: (3)
 
gsl-se addict's Avatar
 
Join Date: Jan 2003
Location: Lynchburg, VA
Posts: 5,088
Likes: 0
Received 11 Likes on 11 Posts
It can be done. You basically would need everything of an S4 (ECU, harness, intake, injectors, air flow meter, TPS, coolant temp sensor, coils, CAS, etc.). You may need to also add some of your own connections for power, fuel pump, and so on. I am not sure if it is worth the trouble or not. Perhaps an S5 setup would be better.
Old 08-06-06, 03:40 AM
  #3  
Audio Cronic Syndrome

Thread Starter
 
blazer1313's Avatar
 
Join Date: Nov 2003
Location: Anacortes, WA Hometown: P.O., WA
Posts: 890
Likes: 0
Received 0 Likes on 0 Posts
So would it be easier to just do MSD? Wonder what all i need to make it work
Old 08-06-06, 05:38 AM
  #4  
Super Moderator

iTrader: (3)
 
gsl-se addict's Avatar
 
Join Date: Jan 2003
Location: Lynchburg, VA
Posts: 5,088
Likes: 0
Received 11 Likes on 11 Posts
The MSD is easy. You don't need a CAS or anything. You can use what you have. You can fire the MSD through the dizzy cap or can do a direct fire setup like firing the 2nd gen coil. The MSD setup will normally be just on the leading. You can do on the trailing with a 2nd MSD box firing through the dizzy cap. It is not worth it though, in my opinon. If you want to go the MSD route, check out the MSD-DIS setup that hyper4mance2k uses.
Old 08-06-06, 08:03 AM
  #5  
GSL-SE PRO

iTrader: (2)
 
JIMMY54's Avatar
 
Join Date: Aug 2001
Location: MISSISSAUGA, ONT. CAN
Posts: 2,515
Likes: 0
Received 1 Like on 1 Post
You can't use S5 due to the electric OMP. The computer goes into "limp" mode if not working.

Going S4 is the only one you can use. instead of buying the power FC and then buying and swaping the old S4 equipment it'd be cheaper for you just to get a haltech or microtech instead.

They come with new harnesses and you get to lose the airflow meter and fully tunable which makes more power. Less work involved and a Cleaner engine bay too!!

That's my opinion.
Old 08-06-06, 10:51 AM
  #6  
Lives on the Forum

iTrader: (13)
 
Rx-7Doctor's Avatar
 
Join Date: Jul 2004
Location: Oregon
Posts: 10,584
Likes: 0
Received 11 Likes on 10 Posts
Originally Posted by JIMMY54
You can't use S5 due to the electric OMP. The computer goes into "limp" mode if not working.

Going S4 is the only one you can use. instead of buying the power FC and then buying and swaping the old S4 equipment it'd be cheaper for you just to get a haltech or microtech instead.

They come with new harnesses and you get to lose the airflow meter and fully tunable which makes more power. Less work involved and a Cleaner engine bay too!!

That's my opinion.
You do not have to have the OMP bolted to the motor to have the ECU function. You attach it to the side of the fenderwell or someother area and hook the wiring harness to it. As long as it is a functioning OMP it will not go into limp mode.
Old 08-07-06, 07:31 PM
  #7  
Audio Cronic Syndrome

Thread Starter
 
blazer1313's Avatar
 
Join Date: Nov 2003
Location: Anacortes, WA Hometown: P.O., WA
Posts: 890
Likes: 0
Received 0 Likes on 0 Posts
Question

Originally Posted by gsl-se addict
The MSD is easy. You don't need a CAS or anything. You can use what you have. You can fire the MSD through the dizzy cap or can do a direct fire setup like firing the 2nd gen coil. The MSD setup will normally be just on the leading. You can do on the trailing with a 2nd MSD box firing through the dizzy cap. It is not worth it though, in my opinon. If you want to go the MSD route, check out the MSD-DIS setup that hyper4mance2k uses.
well if i were to do both leading and trailing and go through a MSD box to individual seperate blaster square coils how would I do this??? Anyone do a writeup on it? It seems that the CAS would be the easiest way to run this. Also most of the MSD boxes I've been told cannot run with a rotary. Which box do I use? You'll have to forgive me I've never used MSD before.
Old 08-07-06, 08:24 PM
  #8  
Nigga stole my bike!

 
clean85owner's Avatar
 
Join Date: Oct 2002
Location: Des Allemands, Louisiana
Posts: 1,154
Likes: 0
Received 0 Likes on 0 Posts
I run an MSD 6AL with Direct Fire a la Paul Yaw's technique. It consists of 3 coils and one MSD 6AL. I'm not sure if Paul Yaw's way is the same as the other MSD setups; I've honestly never looked at any other setups. Considering I'm happy with the setup I have, I never took the time to research other direct fire set ups.

The leading plugs have their own coil. A third coil is connected to the dizzy and my trailing plugs are connected to the dizzy. So two coils for leading, one for trailing.
Old 08-08-06, 01:26 AM
  #9  
Audio Cronic Syndrome

Thread Starter
 
blazer1313's Avatar
 
Join Date: Nov 2003
Location: Anacortes, WA Hometown: P.O., WA
Posts: 890
Likes: 0
Received 0 Likes on 0 Posts
so ok scrap the trailing with a seperate 2nd MSD box. Anyone know which MSD ignition box has a RPM trigger? I want to turn on an air pump to open my 6 ports at a certain RPM...
Old 08-08-06, 07:51 PM
  #10  
Audio Cronic Syndrome

Thread Starter
 
blazer1313's Avatar
 
Join Date: Nov 2003
Location: Anacortes, WA Hometown: P.O., WA
Posts: 890
Likes: 0
Received 0 Likes on 0 Posts
bump
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Professorpeanutrx7
New Member RX-7 Technical
5
08-15-15 01:38 PM



Quick Reply: Second gen wiring harness upgrade



All times are GMT -5. The time now is 03:50 PM.