- -
UserInfo

Welcome Anonymous




Membership:
Latest: 996rshmp
New Today: 0
New Yesterday: 0
Overall: 878

People Online:
Members: 2
Visitors: 7
Bots: 27
Total: 36
Who Is Where:
Members:
Visitors:
01. News
02. News
03. Forums
04. Forums
05. Forums
06. Forums
07. Forums
 Bots:
01. Forums
02. Forums
03. Forums
04. Forums
05. Forums
06. Forums
07. Forums
08. Forums
09. Forums
10. Forums
11. Forums
12. Forums
13. Forums
14. Forums
15. Forums
16. Forums
17. Login
18. Forums
19. Forums
20. Forums
21. Home
22. Forums
23. Forums
24. Forums
25. Forums
26. Login
27. Forums
Hidden: 2
Staff Online:

No staff members are online!
We have received
31189875
page views since
July 27, 2010

Hits New Today: 10531
Hits New Yesterday: 28909

Server Time
24 September 2017 07:42:56 AEST (GMT +10)
Q&A > General Tech Advice > Megasquirt - a story of injection > Community Forums > Mustang Forum Australia - Mustang Tech

View posts since last visit • View posts last 24 hours • View unanswered posts
Forum Index > General Tech Advice

Megasquirt - a story of injection Reply to topic

Go to page Previous 1, 2, 3 … 13, 14, 15, 16 17 18, 19 Next
Author Message
Husky65
Mustang Star

Offline
Joined: Jun 21, 2015
Posts: 436
Location: sydney

0 👍 / 0 ğŸ‘Ž


Yeah so I'm using 4 relays instead of 2 disregarding the fan. I wasn't sure one relay would be enough for everything. Plus I thought separating the coils/injectors/sensors may eliminate some noise. Im happy to reduce the number of relays to 3, as I still have an AC relay I want to add


View user's profileSend e-mail
Husky65
Mustang Star

Offline
Joined: Jun 21, 2015
Posts: 436
Location: sydney

0 👍 / 0 ğŸ‘Ž


Even happy to go to 2 relays of the noise thing is negligible


View user's profileSend e-mail
Husky65
Mustang Star

Offline
Joined: Jun 21, 2015
Posts: 436
Location: sydney

0 👍 / 0 ğŸ‘Ž


Sorry to bombard you fellas
Here is another, using my current fuel pump feed as a ground and putting a fp relay in the boot for less voltage drop.




Last edited by Husky65 on Mon Sep 04, 2017 8:03 pm; edited 1 time in total

View user's profileSend e-mail
hybrid
Mustang King

Offline
Joined: Jul 27, 2010
Posts: 8255
Location: Sydney

0 👍 / 0 ğŸ‘Ž


AC on output?
A thermostat should control ac, not ms.
You can send a signal to the ms when ac turns on so ms raises the idle a bit. Is that what you mean?
Or is that to cut out the ac on high load?


- My 66 Coupe build thread
- My Build Gallery by date
- My Projects page

View user's profilePhoto Gallery
Husky65
Mustang Star

Offline
Joined: Jun 21, 2015
Posts: 436
Location: sydney

0 👍 / 0 ğŸ‘Ž


Yup, the AC will go through the thermostat, to the input on the MS. The MS will then control the output to the AC compressor itself. It's so I can have it switch off under wot and certain other conditions.


Last edited by Husky65 on Mon Sep 04, 2017 7:45 pm; edited 1 time in total

View user's profileSend e-mail
boofhead
Mustang King

Offline
Joined: Nov 02, 2010
Posts: 4437
Location: Brisbane

0 👍 / 0 ğŸ‘Ž


1 main relay
1 main fuel pump relay
1 extras relay

then add relay for extra pump

main fuel pump relay also powers the coils in extra ignition on relays

fan relays are separate

I like to keep it below 20 amps for a 30 amp relay limit to 15 amp preferred.


I will someday think of something clever to say.

Last edited by boofhead on Mon Sep 04, 2017 8:41 pm; edited 2 times in total

View user's profile
boofhead
Mustang King

Offline
Joined: Nov 02, 2010
Posts: 4437
Location: Brisbane

0 👍 / 0 ğŸ‘Ž


Grounding scheme used is a huge noise control factor as well as how you run the wires.


I will someday think of something clever to say.

Last edited by boofhead on Mon Sep 04, 2017 8:40 pm; edited 1 time in total

View user's profile
Husky65
Mustang Star

Offline
Joined: Jun 21, 2015
Posts: 436
Location: sydney

0 👍 / 0 ğŸ‘Ž


boofhead wrote
1 main relay
1 main fuel pump relay
1 extras relay

then add relay for extra pump

main fuel pump relay also powers the coils in extra ignition on relays

fan relays are separate

I like to keep it below 20 amps for a 30 amp relay limit to 15 amp preferred.


So, with the fuse box I'm running, 1 relay for the ecu, 1 relay for the fuel pump/injectors etc, and 1 relay for the coils should be fine?


View user's profileSend e-mail
Husky65
Mustang Star

Offline
Joined: Jun 21, 2015
Posts: 436
Location: sydney

0 👍 / 0 ğŸ‘Ž


boofhead wrote
Grounding scheme used is a huge noise control factor as well as how you run the wires.

Yeah my car is grounded pretty well, I have grounds coming out of my eyeballs. I will be sure to ground each item as best as I can.


View user's profileSend e-mail
boofhead
Mustang King

Offline
Joined: Nov 02, 2010
Posts: 4437
Location: Brisbane

0 👍 / 0 ğŸ‘Ž


Husky65 wrote
boofhead wrote
1 main relay
1 main fuel pump relay
1 extras relay

then add relay for extra pump

main fuel pump relay also powers the coils in extra ignition on relays

fan relays are separate

I like to keep it below 20 amps for a 30 amp relay limit to 15 amp preferred.


So, with the fuse box I'm running, 1 relay for the ecu, 1 relay for the fuel pump/injectors etc, and 1 relay for the coils should be fine?


keep pump on its own relay - ign plus inj on extra relay


I will someday think of something clever to say.

Last edited by boofhead on Tue Sep 05, 2017 8:46 am; edited 1 time in total

View user's profile
boofhead
Mustang King

Offline
Joined: Nov 02, 2010
Posts: 4437
Location: Brisbane

0 👍 / 0 ğŸ‘Ž


Husky65 wrote
boofhead wrote
Grounding scheme used is a huge noise control factor as well as how you run the wires.

Yeah my car is grounded pretty well, I have grounds coming out of my eyeballs. I will be sure to ground each item as best as I can.


no - how you ground sensors and the ms


I will someday think of something clever to say.

View user's profile
hybrid
Mustang King

Offline
Joined: Jul 27, 2010
Posts: 8255
Location: Sydney

0 👍 / 0 ğŸ‘Ž


boofhead wrote
Husky65 wrote
boofhead wrote
Grounding scheme used is a huge noise control factor as well as how you run the wires.

Yeah my car is grounded pretty well, I have grounds coming out of my eyeballs. I will be sure to ground each item as best as I can.


no - how you ground sensors and the ms


Yes, very important.
Here's a good forum thread on the subject.
www.msextra.com/forums...mp;t=66921


- My 66 Coupe build thread
- My Build Gallery by date
- My Projects page

View user's profilePhoto Gallery
Husky65
Mustang Star

Offline
Joined: Jun 21, 2015
Posts: 436
Location: sydney

0 👍 / 0 ğŸ‘Ž


boofhead wrote
Husky65 wrote
boofhead wrote
Grounding scheme used is a huge noise control factor as well as how you run the wires.

Yeah my car is grounded pretty well, I have grounds coming out of my eyeballs. I will be sure to ground each item as best as I can.


no - how you ground sensors and the ms
Yeah that's what I meant.


View user's profileSend e-mail
Husky65
Mustang Star

Offline
Joined: Jun 21, 2015
Posts: 436
Location: sydney

0 👍 / 0 ğŸ‘Ž


hybrid wrote
Yes, you can use a cam sensor from a later model windsor (I've got one in mine just to block the dissy hole and drive the oil pump).
And yes, the injector wiring is definitely different if you're running sequential fueling.
In batch fire, there are two injector channels, so you would wire up 4 injectors per channel.
With sequential, you will run 8 separate injector wires - one to each injector.


Going back to this.

If you had 4 injector channels instead of 2, and had dual widebands, would you wire them up as a bank, or opposing.

Ie, Channel 1 = Cylinder 1,2, Channel 2= 3,4 Channel 3=5,6 etc,
As this would allow the ecu to adjust that banks afr only, without changing the other banks afrs.

Or would you do it in opposing firing order pairs, ie Channel 1 = 1,6 - Channel 2 = 3,5 - Channel 3 = 7,4 etc.
With dual widebands, it seems the ecu would not be able to correctly adjust afrs per bank with this method.

I guess what I'm asking is does fuel injected into a cylinder when it is not on the firing order have any affect on AFR's of that cylinder?


View user's profileSend e-mail
Dwayne
Senior Mustang

Offline
Joined: Jun 01, 2016
Posts: 150
Location: Radelaide

0 👍 / 0 ğŸ‘Ž


My edelbrock pro-flo uses 4 injector channels to fire with the 351 firing order: 8/4 2/7 1/3 5/6


View user's profile
All times are Australia/Sydney
Go to page Previous 1, 2, 3 … 13, 14, 15, 16 17 18, 19 Next


Jump to:

SocialMedia

Like this page? Google +1 it!

LatestForumPosts
Last 10 Forum Messages

Husky's 65 Restomod
Last post by Husky65 in Mustang Projects on Sep 23, 2017 23:08:38

69 Mach 1 351W 5 speed
Last post by Pinto-Pete in Mustangs for Sale on Sep 23, 2017 19:19:14

hybrids 1966 Coupe Project
Last post by nassi in Mustang Projects on Sep 21, 2017 20:58:50

Ronin187 - pics as promised
Last post by Husky65 in Mustang Projects on Sep 18, 2017 21:17:52

Jacko's Project
Last post by Ausjacko in Other Projects on Sep 18, 2017 15:48:34

diff gears
Last post by ozbilt in Pre 1973 on Sep 17, 2017 21:15:58

Megasquirt - a story of injection
Last post by hybrid in General Tech Advice on Sep 16, 2017 17:21:27

Sidchrome Project Car - Mustang Edition
Last post by StephenSLR in Pre 1973 on Sep 15, 2017 09:59:57

Hello, I don't have one.
Last post by cage in 2015 onward on Sep 15, 2017 08:51:26

Brake,indicator lights
Last post by 66STNG in General Tech Advice on Sep 15, 2017 08:04:39

TopPostersToday
   Husky65 
 Posts: 
 4 

   ozbilt 
 Posts: 
 2 

   Chux 
 Posts: 
 1 

   Pinto-Pete 
 Posts: 
 1 

   unilec5544 
 Posts: 
 1 

   gbx78 
 Posts: 
 1