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Completely new fuel injection system computer? (Page 5/8) |
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woodyhere
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DEC 24, 06:07 PM
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fierosound
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DEC 25, 11:14 AM
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If you believe FAST's "ad copy", THEORETICALLY, you should be able to run the EZ-EFI on ANY SIZE ENGINE and the ECU should compensate properly. But in 8 months, I've never found any website with EZ-EFI installed on a V6 or 4-cylinder engine.
EZ-EFI has 4-injectors (1 per throat) and EZ-EFI 2.0 has 8-injectors (2 per throat). Before the 2.0, people would have to install 2 EZ throttle bodies on BB's or engines producing more than 550hp.
I got the 2-injector EZ-EFI Jeep kit for my Indy's SD4 (should be good to about 300hp). The ECU is running only fuel for the TB. The timing is completely mechanical (as with carb) http://www.fuelairspark.com...l-w-o-fuel-pumphtml/
The only way I can get it to even run now is to lie to the ECU and tell it I have the 4-injector TB (halving the fuel) My problem is NOT unique. Many who ran into problems say they gave up and put their carb back on. FAST and the "experts" have gone strangely SILENT now. Guess I used up my "tech support"??
Physically, the FAST TB is the only one that fits the engine bay with my SD4 (because of trunk wall and low decklid), so unfortunately I can't just go to an MSD, Holley or Edelbrock EFI throttle body.
The only solution may be to buy another FAST product to use with the TB I have. http://www.fuelairspark.com...unable-xfi-sportsman
I don't know if I want to spend that kind of money (again).
Tony B.
------------------ Calgary time/temp
3.4L Supercharged 87 GT Click me Super Duty 4 Indy #163 Click me[This message has been edited by fierosound (edited 07-26-2014).]
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fierosound
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JUL 24, 09:26 AM
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ericjon262
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JUL 24, 10:31 AM
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I'm not surprised in the least.
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sardonyx247
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JUL 25, 12:38 PM
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7730 is $30, you want to spend $1000. stock ECMs "autotune" and ALL ECMs only tune fuel, they will not tune spark, they only pull timing if knock is dectected, thats it. You are saying it will do all of this, as there ad says, don't believe it. a GM ECM has far more options than stand alones. GM spent million$ on each ECM, you think any stand alone company spent a million on thiers? Stand alone units are the most basic of basic, childs play in comparison. Stand alone units are for "my car didn't come with an ECM, what can I add" and then you get the hacked GM ECMs and they just KILL the stand alone units.
oh and BTW it won't even work, we have low impedance injectors.
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Dennis LaGrua
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JUL 26, 08:28 AM
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I could never understand the fascination with aftermarket ECM's when the stock GM ECM's are tunable, can do engine management, can shift an automatic transmission, while also providing diagnostics. I can buy a used working OEM GM ECM/PCM for $50.00. The aftermarket units cost $1000 and don't offer the potential for any additional horsepower. You can do what you want with your money but there are guys on this forum that have done complete engine swaps for just a bit more than the cost of that FAST unit. Is this money well spent?? ------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
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fierosound
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JUL 26, 11:10 AM
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82-T/A [At Work]
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JUL 27, 03:54 PM
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quote | Originally posted by Dennis LaGrua:
I could never understand the fascination with aftermarket ECM's when the stock GM ECM's are tunable, can do engine management, can shift an automatic transmission, while also providing diagnostics. I can buy a used working OEM GM ECM/PCM for $50.00. The aftermarket units cost $1000 and don't offer the potential for any additional horsepower. You can do what you want with your money but there are guys on this forum that have done complete engine swaps for just a bit more than the cost of that FAST unit. Is this money well spent??
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Since I'm the one who started this post a while back, I might as well respond to this.
For a lot of people, it all has to do with time / effort. What you say above sounds very simple... but I know that tuning an old-ass GM ECM with OBD1 isn't as simple (in most cases) as hooking up a PCM reader and setting a couple of flags and away you go. It takes removing the EPROM, putting it on a burner, going through, and going back and forth trying to determine the specific differences in your configuration so that it works well. In most cases, it probably requires a dyno, or at the very least... logging your variables while you're driving so that you can figure out what you need to change the next time you reflash that EPROM. It's a pain in the ass...
the FAST system actually does work for the applications it was originally intended for (V8s), and you drop one of those on, and magically it takes care of everything. You literally set a couple of flags, and you have effortless tuning that forever works.
As for cost vs performance... I want something that looks and is a little bit faster than it did when I bought it, but I want it to be reliable, and not have to function off 30 year old technology. A Fiero that ran mid 14s and looks 99% stock is all I need / want. I've had / have plenty of other cars that are much faster.
I am really at the point in my life that I just don't have time with work / family to sit down and spend hours working on something like ECM tuning. I've got projects with my kids, work, home renovations, etc. I don't even mow my own lawn anymore because I just don't have the time to do it. That was something I always told myself I'd do myself... I never thought I would hire a landscaper.
So, it's all relative.
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PaulJK
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JUL 27, 06:01 PM
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quote | Originally posted by 82-T/A [At Work]:
Anyway, just curious...
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Just my free advice but i would absolutely not spend money on the 2.8. Upgrade to a 3.4, enjoy it, and save money for an engine upgrade.
There's a Really Nice 3800SC GT in the Mall right now for $5500.[This message has been edited by PaulJK (edited 07-27-2014).]
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82-T/A [At Work]
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JUL 27, 07:26 PM
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quote | Originally posted by PaulJK:
Just my free advice but i would absolutely not spend money on the 2.8. Upgrade to a 3.4, enjoy it, and save money for an engine upgrade.
There's a Really Nice 3800SC GT in the Mall right now for $5500.
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Haha... thanks Paul, I really do appreciate it, but as I just got through saying... there are many of us who aren't interested in all-out speed / performance. We just want a well-running / well restored vehicle. My 87 Fiero was my first car. I've already rebuilt the 2.8 into a 3.2 (.040 overbore pistons, 3.1 crank and rods etc... etc...). Before I put it in storage, I was 75% of the way through converting it to a manual (the only thing I HADN'T done, was actually install the transmission).
I want the car to run / drive with the same kind of characteristics as it did when I first bought it in 1995 and it had 52k miles on it. It ran really well. I could spend a ton of time and money trying to refurb and remanufacture every component on the car, and for the most part, I've been doing that... http://www.pontiacperforman...et/car87FieroSE.html
But I really want a system that I can just get in the car and go. But like I said a few times, I'm at the point in my life where I barely have the time to spend 5 minutes in the garage anymore. So burning EPROMs and spending a ton of time logging and tuning the chip just so it runs right... that's not something I really want. I want to be able to get in and go, and enjoy it. It's not about the money, it's about trying to relive my teenage years... minus the constant breaking down, and having 5 cents in my checking account.
For performance, I've got an LS1 swap into a 944 planned.
Or... I'll find something to do with this Olds 455 big block that I spent a ton of money on and still don't have a car to put it in.
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