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EZ EFI in the future

trevmountain

trevmountain

1/2 ton status
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I am in the process of painting my K30 and I've got the truck completely taken apart. As I am looking at all the things I want to do to the truck still this EZ efi kit is on the top of my list. Which brings me to my question. While I've got access to the two gas tank pickups should I consider replacing them now with the TBI version. Actually I have no idea what is unique to the TBI vs the Carb pickup in the tank and I also don't even know if I can run the TBI version with a carb until I get the EFI. Ontop of that I also don't know if doing the TBI pickup is even neccassary with this particular efi kit. I only remember reading through a thread awhile back and the guy was switching his out for a TBI unit in the case of his EZ kit. When looking at the website and researching online I haven't seen anything conclusive that says you need anything more than an electric fuel pump.

learn me
 
The TBI tanks have a baffle tray in the bottom that keeps fuel right at the fuel pick-up. I would upgrade your tank(s) now and they can be used with a carb without any issues.
 
ooooh so it's actually the entire tank that is different and not just the pickup unit. Is that correct?

I was thinking it was just the pickup or sending unit that drops into the tank and pulls the fuel up that varied between carb'd and TBI'd rigs.
 
trevmountain said:
ooooh so it's actually the entire tank that is different and not just the pickup unit. Is that correct?

I was thinking it was just the pickup or sending unit that drops into the tank and pulls the fuel up that varied between carb'd and TBI'd rigs.
Click to expand...

Yes, the tank AND the sending unit are different. You can use a carbed sending unit in the TBI tank and vice versa but you would be better off using a TBI tank with the baffle tray in it when you go EFI which at that time you would need to install the TBI sending unit if you go with an intank pump (recommended over a frame mounted).
 
Definitely go with the TBI tank.

I have seen other brands use a normal tank and have to keep it above a 1/4 tank or it would starve on a trail.

Won't happen with a TBI tank, well it might but I doubt your truck will be in a situation where it would happen
 
I agree with you, but I have starved my TBI with a stock pickup and tank going down a steep angle before. I was damn near out of fuel though.

Martin
 
yeah, to agree....
With my EZ setup I went TBI tank, just for the baffling. I also went with a Walbro fuel pump, plug and play into the stock sending unit. In-tank pump is best.

Here is a thread I started. The truck is running great but the thread kinda fizzled out. I gotta finish it. http://coloradok5.com/forums/showthread.php?t=290704&highlight=efi
 
K85...Yep it was your thread I was reading regarding the TBI stuff. Ya you definently need to finish your thread. So how does it run. Night and day difference or just mild improvement?

Now knowing it's the tank that needs to be swapped I'll probably just wait and address later on.
 
the biggest thing I don't like about the ez is the fact it doesn't tie into the dist and doesn't allow full tuning. Still for a carb swap it does real well.
 
Well, I rather like it not tied into the distributor. I have a pro billet msd and can fully adjust the timing. If the two were tied together, it would need laptop tuning.

The truck is definitely running better than before but the carb wasn't tuned for crap. The best benefit so far......... runs perfect at any altitude or angle, even when washer fluid is pouring out of the squirters
 
Laptop tuning is the best, I can say that because only 2 out of the 5 vehicles I own are fuel injected and one is mech and has no dist. It makes it so you can have 30+ degrees at idle, drop to 10 with any movement of the tps and be adjusted at every rpm step, vac reading and load setting. It is the best thing since sliced bread.
 
I guess I can agree with you there. For my blazer, being a simple play toy, I just want it to work better than the old carb, which wasn't hard. My main concern was with angles. If I used the money for a FAST XFI set up, I'd rather buy a LS motor and be able to smog it.
 
I'm still partial to ours...

A lot less wiring, great throttle response, great driveability, more features only if you want them and still self learning.

www.atomicefi.com

Any questions? Ask away...

-Phil
 
Phil, I really like MSD and please stay around here, I like you. But I still say the EZ-EFI is a better system. Yeah, atomic EFI can control the timing I agree, but one of your sweet programmable digital 6 boxes can do that just as easy for only 360 bones. EZ-EFI has a free flowing throttle body with the injectors below the throttle plates in the intake for a more direct fuel delivery, and a proven return style fuel system.

Yeah, the atomic is slightly easy to wire, but I'd rather run a few more wires and leave my ECM off the engine than put the ECM directly on top the engine and run a few less wires.

With that said, both systems are pretty cool really, both USA made (I take it atomic is made at your el paso facility?) by reputable companies, and I know EZ works because I have it, and it looks like the reviews for atomic are pretty decent so far as well.
 
To each his own... I'm not going anywhere and appreciate the feedback.

I will say that unless you are making over 650 horse then our 850 CFM throttle body should flow plenty. We did plenty of testing mounting the injectors below the throttle blades as well and had much better results with running fuel through the annular discharge rings.

It's all a matter of opinion; ask 10 people and you'll get 15 different answers...

Check out this link below to see what the Atomic does on Alex Sanders buggy. Alex won Top Truck Challenge in 2011 and competed with the Atomic on his rig in the 2012 Top Ten TTC competition.

Sorry, not savvy enough to embed the vid...

http://www.youtube.com/watch?v=f6DzsSt3gw8
 
Here you go...


EDIT: I just viewed it, thats a funny video!
 
Last edited by a moderator:
folkenheath said:
Yeah, atomic EFI can control the timing I agree, but one of your sweet programmable digital 6 boxes can do that just as easy for only 360 bones.
Click to expand...

So without knowing the Atomic setup, and just having read the MSD digital 6 instructions, how is timing handled?

I know megasquirt was initially criticized for lack of timing control, but factory EFI allows tuning spark at most nearly any engine operating parameter (load vs RPM)...does the Digital 6 or Atomic offer that? Not to mention knock retard if things go wrong.
 
dyeager535 said:
So without knowing the Atomic setup, and just having read the MSD digital 6 instructions, how is timing handled?

I know megasquirt was initially criticized for lack of timing control, but factory EFI allows tuning spark at most nearly any engine operating parameter (load vs RPM)...does the Digital 6 or Atomic offer that? Not to mention knock retard if things go wrong.
Click to expand...

Its the 6530 programmable model using their prodata software.

https://www.msdignition.com/Products/Ignitions/6530_-_MSD_Digital_Programmable_6AL-2.aspx

Wiring is same as the EFI, the box is between the pickup and rotor. It doesn't use the same matrix type programming as an EFI program, but with the rpm map and the pressure map (using a MAP sensor), it pretty much does the same thing. It technically doesn't have a knock retard, but since it has step retards you could wire a knock sensor to do that. Although knock sensors are for pussies, if it starts knocking let off the gas and diagnose the problem. Unless you are making 1200 - 2700 hp with a twin turbo V8 or something, then I suppose using a knock sensor is acceptable without losing your mancard. However, many people disable the knock sensors in the factory efi to make sure it isn't prematurely retarding their timing, so I don't think I would ever add one, unless you were really pushing the limits and the car was so load it would dround out knocking.

Now, as with any distributor ignition system, timing is limited by the rotor phase, so you have a specific range of 30 - 40 degrees you have to play with, and ideally you would have perfect phasing at peak torque, unlike a DIS where you can set the timing at absolutely whatever you want.
 
Why are you so against the PCM being mounted on the engine? Just curious.

Martin
 
Just because of the heat and vibration. I don't see a benefit of saving a few connectors to put the ECM in a harsher environment. Plus, with the ECM mounted to the throttle body, you can't use it to control anything else if you want, such as 8 injectors on a multiport intake.
 
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