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I think that is why I've fallen in love with the FAST EZ EFI... it just works... and seems to get better with each drive... and all I've had to do is DRIVE... it's like gettin' laid by the cheer squad! So easy... and FUN! :woot: |
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Hey Guys,
Question on where you guys hooked up your MAP input for your MSD box (ASSuming you are using this on an LS app)? Did you guys T off the EZ EFI's MAP or did you install another sensor in the intake. I know this may seem counter-intuitive to use on an LS but I have a specific reason. Open to your thoughts. Judging by what most are using it on, it would appear they are using distributor'd engines and controlling just fuel with this set-up. Thanks, Dave |
So is this system MAP or MAf based?? I am assuming there is no timing control...just fuel control based on O2 sensor feedback.
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Does anyone know if the EZ EFI will handle more than 500 hp? I have 510hp naturally aspirated on my SBF 427 and I want to add a Paxton Supercharger. Paxton says up to a 30% gain in hp over stock. Would the easy work or would I need to step up to the XFI and all the tuning costs etc?
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Personally I'd choose an XFI system once you go beyond N/A. You're going to need effective control of your timing etc and the EZ EFI will not do that. |
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After reading this, I am definitely going with the EZ for my 68
I had always been a little nervous about getting the XFI, because of the tuning, and lack of laptop access but now that I have read so many good things, Im sold |
rear-bypassed fuel system?
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The fuel system issue is the main reason I have not jumped into the EFI arena. Gary |
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I've installed two EzEfi systems, one normal kit with the throttle body &'one retrofit kit that replaced a FAST Classic ECU & harness. This system ran 8 injectors & used the existing fuel pump & throttle body. On this system I installed an MSD 6AL2 programable unit & added a second MAP sensor. It all worked great. With an 8 injector system you can supply enough fuel for more horsepower. At SEMA they had a similar system mocked up & when I asked for the part number, they said they didn't have one for it yet, but it was made of parts they already sell.
I used the MSD 6AL2 to retain the locked distributor already in the engine. The XFI would probably have been a better choice as it would have run the ignition & I hear it can self - tune the same as the EzEfi if desired. David |
I'm doing one on Charley's 494 cid Cammer motor with two throttle bodies. No vacuum reference, rear mounted bypass. I am tricking the computer to get it up and running, the base map it builds with the correct cubic inches and fuel pressure is a mile off. Won't even run on 8 cylinders to get to the 140 degrees it needs to start adjusting the tune, and keeps killing plugs.
Looks like it'll work, but in the case of a 13:1 700+ HP solid roller Cammer Ford the XFI would have been a much better choice............. :yes: They say it'll support big power with the two 4-barrel throttle bodies, but then they give you a small 190 LPH pump which I don't think supports their claims. Believe that pump is only good for 450 hp or so, 500 max. |
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David -- They have you "fooled" too... chalk another one up to "marketing". The FAST XFI 2.0 WILL NOT self tune.... not like they've led consumers to believe. It WILL smooth out / correct the VE table... as long as the table is "close" to being correct. It's not like the EZ EFI where you just answer some simple questions - fire up the motor and have it tune itself without any further input. The FAST EZ EFI MULTIPORT system is part number 302000 and sells for around $850 |
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You probably need to recalibrate the Turbulator..... |
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I should have thought of that............. :lol: |
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I have a EZ EFI question for you guys. I know they say 500 horsepower is the max for the setup, but I have heard others using this at 600 hp or so.
I have a 1967 Ford Mustang Fastback. I have a Keith Craft 427 pushing 510 hp and set up for a blower. I have a Paxton supercharger for it and figure it will boost it up to around 675 hp or so. Can I run the EZ still or would I need to step up to the more costly XFI setup? Thanks in advance! |
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^^^^^^^^^^^ Exactly what Chad said.
I installed (upgraded the firmware) last week on my buddies XFI system to the 2.0 "self tuning"..... it is NOT self tuning.... but will correct a "close" VE table. And here's t he sweet part of the deal. I used a "canned" tune from their library and she fired right up. A very little adjustment - and we went for a drive. The car never ran better. I still have a couple bugs to work out in one spot (1200 rpm light throttle) but that's it. So it's pretty nice set up. TO OP: Call FAST and discuss your application.... and see what tune up they have that will get you started. My guess is they have one. But you definitely need a boost referenced capable ECU. |
Heres a pic of my EZI EFI setup on an 8 stack crossram ..
http://i221.photobucket.com/albums/d...CARFEST021.jpg |
Yeah -- nice -- but how does it run?? Are you happy with the ECU etc -- driveability.....
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I finally gave up on the EZ EFI on Charley's cammer Fairlane. It runs and idles nice, drivability is good, but it just won't learn the harder throttle areas. Stays lean, fuel pressure is steady. This is a 700 HP twin throttle body setup and probably never should have been used on this combo.
Couple things I noticed. The fuel pump they gave him for 700 HP is only a 190L pump that will not support that power level in my opinion. Also, I was having big problems with pressure and a loud fuel pump, turns out the filter they gave him is a carb style solid phenolic type filter, can't even blow through it. Swapped to a real stainless EFI 40 micron (on the pressure side) and fixed that. My opinion is this system should work well on mild to moderate setups, but you need to go to a programmable system beyond that. We're swapping to an XFI for the Fairlane. |
Jody -- You and I both know the EZ EFI was designed for super simple set ups.... mild cams with good vac signal etc.
The new XFI 2.0 is really a nice ECU.... IMHO a guy can just run the 2.0 - batch fired - with a simple MSD distributor and have a real nice system that is RELIABLE... and simple. I like the way the 2.0 mods the VE table. |
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has very good response and a very broad tourqe curve. I think ive been lucky with my install as ive read most guys arnt this happy when trying to convert a stack setup electronically. There definatly is shortcomings with the tunability but as i was a complete novice with efi i went the easy route. the induction has cost probably more than the entire engine but pretty happy so far. Gav |
Gav --
I've had fantastic success with both my 8 stack motors... I'm extremely pleased with the EZ EFI and my combinations. Both motors were built for EFI -- with wide LSA cams etc... and I love being able to just change only the A/F ratio and bingo - done... Your car looks amazing! Love the cross ram set up. :cheers: |
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A GSS340/255lph will get it done with 10% to spare. |
This all means I will probably have a EZ EFI controller for sale...
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We have been using the new Holley HP system. It takes a lot of the guess work and for most set ups it is plug and play. We just did a coil on plug ignition (LS style) on a conventional small block. It was pretty cool. check it out in our test car section Also take a look at the carbon fiber intake plenum
http://customworksproducts.com/our-test-car.html |
I'm looking at putting the FAST setup on a very mild 364 nailhead Buick, I'm wondering how that would work out.
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Just as easy as Chad said.... trust us! The key to EFI is that the INSTALLER tries not to think he's smarter than the EFI and just follows instructions. Most of the issues I've seen are self caused by the installer thinking they knew more than the system... WRONG! |
I should be safe then, I'm sure the EFI is smarter than me :lol:
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Hey I will chime in here too...... we put the FAST ez efi on a 401 nailhead this summer, and it is AWESOME. We also just finished a Holley HP setup on a vette, and it is AMAZING. Both have their merits.... the Holley system is more advanced, and has way more potential, but it still has to match the application. For a fairly stock nailhead, the FAST is perfect and works so amazing. Our customer can't believe how well it works for a cruiser (by the way he owns both the fast and holley jobs) and how well the nailhead runs. It really is like a new car.
My opinion though is forget the FAST plumbing kit option, their pump sucks (sorry FAST) and go with an aermotive in tank on your factory sending unit. They are affordable and work way better. If you have to do a frame mounted pump, I just used a holley HP and it is a great option. Quietand no cavitation/air lock like the fast pump. |
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I agree, if you want a trouble free system for a stock motor the Holley Avenger is a better way to go, plus you can always upgrade it to the HP system with just a software change. |
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It isn't as plug in and run as the EZ but for more than 500hp it is really the way to go. Personally I still stick to the sequential with cam sync. |
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All engines with EFI should have the vac referenced to the regulator.. here is why. You are trying to tune the fuel curve. If the pressure/vac below the injector changes.. and it does, if you don't compensate for that you will be tuning the fuel curve and the pressure differential too. By keeping the pressure differential constant the ecu just tunes around the actual fuel curve and not the curve and pressure differential. Pressure across the injector remains the same. This is a basic setting on the EZ that "Bob" forgets. When you enter the fuel pressure in the hand held, it is asking that because it is using the engine vac to determine what the fuel pressure is and tuning based on that. This is basic EFI101 but even some of the "experienced tuners" out there miss this one. |
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