FMU selection help....
Thread Starter
Teching In
Joined: Jul 2005
Posts: 7
Likes: 0
FMU selection help.... Ok, first off, this is for my 3.8 camaro that i turbocharged. So please don't kill me, I just would like some intellegent help. I've been using 36lb accel injectors and HPTuners to try to tune, but its a pain in the neck to get it right by just playing with the MAF tables since they don't offer 2 bar speed density for us yet. I was thinking of just putting my OEM injectors back in and then using an FMU. What ratio FMU should I get for use with those injectors? I think they are 21 lbs/hr. Any help would be greatly appreciated. Thanks.
~Tom
~Tom
are you maxing out your maf?
did you alter the flow rates for the 36# injectors in the injector section.
it should be possible if you able to provide the correct injector values for the tune, and make sure your commanded air fuel = what your seeing with the wideband.
FMU = a bandaid.
Granted my pinions are a little biased, but whenever a control system is not in control, your sacrificing reliability.
Ryan
did you alter the flow rates for the 36# injectors in the injector section.
it should be possible if you able to provide the correct injector values for the tune, and make sure your commanded air fuel = what your seeing with the wideband.
FMU = a bandaid.
Granted my pinions are a little biased, but whenever a control system is not in control, your sacrificing reliability.
Ryan
Thread Starter
Teching In
Joined: Jul 2005
Posts: 7
Likes: 0
Ryan, I agree about the FMU being a bandaid. I'd love to get it right with the injectors, but it seemed like I was always running rich while cruising even when I got the injectors fairly dialed in. I was seeing 12.9 on the wideband while cruising. Could this be because one of my O2's wasn't reading correctly? In hptuners one o2 was cycling nicely but the other would be up, then down, then up....which is a symptom of a shot O2. Could this have been why I was running rich at cruise? If so that would solve a world of problems. Thanks for replying.
~Tom
~Tom
I have seen cars not even go closed loop when the fueling was so far off.
I would reccomend switching sides with the sensors, and seeing how that helps the problem.
Can you e-mail me a copy of your stock bin, and your modified bin file and I can take a look at it, see if there is anything that stands out. ryan212@aol.com
Ryan
I would reccomend switching sides with the sensors, and seeing how that helps the problem.
Can you e-mail me a copy of your stock bin, and your modified bin file and I can take a look at it, see if there is anything that stands out. ryan212@aol.com
Ryan
Thread Starter
Teching In
Joined: Jul 2005
Posts: 7
Likes: 0
Your awesome for helpin me out, but you have to bare with me on getting you those bin files. I've not even sat in the car in months and am going to be busy for the next few days. I'll shoot em over to you as soon as I can. I reallllly appreciate you takin a look. Thanks,
~Tom
~Tom
Trending Topics
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
Staging Lane
Joined: Nov 2004
Posts: 73
Likes: 0
From: Ottawa
tom: our injectors are 22#ers, as for the fmu, i'm running a cartech 2025 unit that is fully adjustable anywhere from 6:1 - 12:1, see if you can get ahold of Teufel Hunden on the other FI-V6 boards he'll clear things up for ya