Advanced ecu questions?
Advanced ecu questions? Ok, I know this isn't entirely LS1 related but I am going to use an LS1 ecu/harness/sensors.
I'm currently building a quadcam Lexus 4.0L v8 that will be using Suzuki Hayabusa throttle bodies. The cool thing is, the throttle bodies already have injector bosses cast into them. Problem with that is idle quality will suffer quite a bit with the injector 12+" from the intake valve.
Normally injectors are operated off a 12vdc common hot and the ECU switches between 12v+ and ground to fire the injector. If I put a set of 24lb injectors in the bosses at the head flange can I use a transistor/thyristor to switch my 12vdc common hot from the injectors at the flange to the ones in the intake? Will this cause some crazy breakup? Has anyone ever tried this before?
I could put both injectors in parallel and just switch the wire that's 12v always hot to select which injector banks I will be using? I realize that its definatly possible as long as the injector impedance is close enough the drivers don't freak out. I also realize I might run into a nightmare trying to keep track of the fuel tables as it switches.
Really just curious for info from people that know these ecu's pretty well.
I'm currently building a quadcam Lexus 4.0L v8 that will be using Suzuki Hayabusa throttle bodies. The cool thing is, the throttle bodies already have injector bosses cast into them. Problem with that is idle quality will suffer quite a bit with the injector 12+" from the intake valve.
Normally injectors are operated off a 12vdc common hot and the ECU switches between 12v+ and ground to fire the injector. If I put a set of 24lb injectors in the bosses at the head flange can I use a transistor/thyristor to switch my 12vdc common hot from the injectors at the flange to the ones in the intake? Will this cause some crazy breakup? Has anyone ever tried this before?
I could put both injectors in parallel and just switch the wire that's 12v always hot to select which injector banks I will be using? I realize that its definatly possible as long as the injector impedance is close enough the drivers don't freak out. I also realize I might run into a nightmare trying to keep track of the fuel tables as it switches.
Really just curious for info from people that know these ecu's pretty well.
Not sure why you need 2 sets of injectors on the engine... You can get any size you need that are pretty easy to get to idle with.
The only problem i see is you trying to get it to go into sequential fueling mode with the wrong cam and crank reluctor.
The only problem i see is you trying to get it to go into sequential fueling mode with the wrong cam and crank reluctor.
I'll just build my own injector controller.
Building a driver sounds like the best path unless cost isn't a concern. As mentioned, you go BIG if you need to with a driver and a manifold referenced fuel system. You can run some fatty 160s (1680cc) if you need with this arrangement.
TECH Enthusiast
Joined: Aug 2006
Posts: 502
Likes: 1
First off, you're asking questions on how to make a oem ecu work where you really should be using a standalone system on a board where the main topic of discussion is using the oem ecu with an oem system?
Then you want to make snide remarks about it, insulting every single person on this forum, because somebody suggested checking out a board where the focus is actually more of what you are looking for?
I would suggest building your own Megasquirt, but since you can build your own "injector driver" a Megasquirt would probably be overkill.
Good luck with that.....
Then you want to make snide remarks about it, insulting every single person on this forum, because somebody suggested checking out a board where the focus is actually more of what you are looking for?
I would suggest building your own Megasquirt, but since you can build your own "injector driver" a Megasquirt would probably be overkill.
Good luck with that.....
Trending Topics
So Dan, tell me how using a megasquirt is any different than the OEM ecu with HPTuners? Both are fully tuneable, yet the OEM system employs a way to drive a coil per plug whereas the megasquirt doesn't.
Sorry if you were insulted by that comment, prove me wrong though.
Either way I'm done with this forum, I tried to learn a few things here and I feel like I just got dumber.
If a moderator reads this please delete my account
Sorry if you were insulted by that comment, prove me wrong though.
Either way I'm done with this forum, I tried to learn a few things here and I feel like I just got dumber.
If a moderator reads this please delete my account
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo So Dan, tell me how using a megasquirt is any different than the OEM ecu with HPTuners? Both are fully tuneable, yet the OEM system employs a way to drive a coil per plug whereas the megasquirt doesn't.
Sorry if you were insulted by that comment, prove me wrong though.
Either way I'm done with this forum, I tried to learn a few things here and I feel like I just got dumber.
If a moderator reads this please delete my account
Sorry if you were insulted by that comment, prove me wrong though.
Either way I'm done with this forum, I tried to learn a few things here and I feel like I just got dumber.
If a moderator reads this please delete my account
With an attitude like that, the last thing I'm going to do is "prove you wrong."
Go pound salt. I hope they do delete your account.
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
this thread is done ... too many posts were removed that I can't see for me to make judgement on infractions/timeouts .. so I'm just going to lock it
one of the posts called someone "dickface" (sorry.. if you can't handle arguments maturely I have no sympathy for you) ... while the post referred to didn't resort to name calling ... if I were to ask for infractions or time outs it'd be against the person that can't argue maturely and has to resort to childish name callilng
one of the posts called someone "dickface" (sorry.. if you can't handle arguments maturely I have no sympathy for you) ... while the post referred to didn't resort to name calling ... if I were to ask for infractions or time outs it'd be against the person that can't argue maturely and has to resort to childish name callilng
