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Re: Fuel Injection vs. Carburetor BB
[Re: CurYellowBird]
#752119
07/19/10 09:10 PM
07/19/10 09:10 PM
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Joined: Feb 2009
Posts: 583
San Antonio, TX
CurYellowBird
OP
mopar
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OP
mopar
Joined: Feb 2009
Posts: 583
San Antonio, TX
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Another thing I wanted to ask is if you had to use a specific distributor with the EZ-EFI system? Or can you use a regular aftermarket electronic distributor? I was planning on taking my stock "single point" distributor and converting it to electronic, but if I have to use a specific distributor with this setup then there is really "no point" to the conversion lol.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: Fuel Injection vs. Carburetor BB
[Re: DJVCuda]
#752121
07/19/10 09:29 PM
07/19/10 09:29 PM
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Joined: Dec 2009
Posts: 1,074
detroit, mi
POS Dakota
super stock
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super stock
Joined: Dec 2009
Posts: 1,074
detroit, mi
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Quote:
EZ has nothing to do with timing, all you need is a clean tach signal from your coil ( or a tach signal adapter they supply for stock chrysler ignitions) and your set.
I am a complete factory EFI hater. I've been frustrated with the factory efi in my truck since i got it and it's lack of flexibility. It's worthless. Went with a mighty demon.
BUT...EZ EFI in my opinion is the best thing out there for someone who wants almost instant driveability without a masters degree in standalone tuning. Some of those systems are a lot to learn. Some of us dont care to go that far with it because then it becomes work. I'm sure some can relate to that.
In your case where tuning 2 carbs to run together on a tunnel ram can be a PITA, the EZ EFI is definitely the way to go.
You should post a few vids to show how it starts, runs and drives dave. I would really like to see that. 
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Re: Fuel Injection vs. Carburetor BB
[Re: DJVCuda]
#752123
07/19/10 09:40 PM
07/19/10 09:40 PM
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Joined: Jan 2003
Posts: 11,076
Berlin, N.J.
abodyjoe
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,076
Berlin, N.J.
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Quote:
BUT...EZ EFI in my opinion is the best thing out there for someone who wants almost instant driveability without a masters degree in standalone tuning. Some of those systems are a lot to learn. Some of us dont care to go that far with it because then it becomes work. I'm sure some can relate to that.
i agree 100%
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt. www.MoparMisfits.com
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Re: Fuel Injection vs. Carburetor BB
[Re: DJVCuda]
#752124
07/19/10 09:57 PM
07/19/10 09:57 PM
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Joined: Jan 2003
Posts: 11,076
Berlin, N.J.
abodyjoe
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,076
Berlin, N.J.
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Quote:
that is a good idea.... i just need a video camera... i only take photographs...
i'll charge the battery. when ya want to go beat the hell out of that cuda? 
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt. www.MoparMisfits.com
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Re: Fuel Injection vs. Carburetor BB
[Re: cudaboone]
#752129
07/19/10 10:43 PM
07/19/10 10:43 PM
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Joined: Nov 2007
Posts: 5,337
the house on the left.
cogen80
master
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master
Joined: Nov 2007
Posts: 5,337
the house on the left.
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Quote:
WHO is worried about MPG. I want HP. Does fast ez-efi have anything for a 528 aluminum hemi with 700+ HP.
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Re: Fuel Injection vs. Carburetor BB
[Re: GregCon]
#752131
07/19/10 11:51 PM
07/19/10 11:51 PM
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Joined: Feb 2009
Posts: 583
San Antonio, TX
CurYellowBird
OP
mopar
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OP
mopar
Joined: Feb 2009
Posts: 583
San Antonio, TX
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Well the pro touring crowd cares about MPG. Sure would suck trying to do long distance driving and having to stop every 150-180 miles (if your lucky) to top off the gas tank.
My goal out of this is power with reliability.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: Fuel Injection vs. Carburetor BB
[Re: Neil]
#752132
07/20/10 12:20 AM
07/20/10 12:20 AM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
I think a lot of people have issues with carburetors because ... they buy a new one and take it from the box and bolt it on and then get angry when it doesn't work perfectly.
 Fully. Just because you dropped $400 on a new carb, does't mean you can plop it on your engine and expect it to be 100% perfect for your application. Was talking to one self-proclaimed gear-head who was complaining about the poor performance of his holley 750 vac carb. The thought never even occured to him to buy a jet kit! Nevermind messing with accelerator pump shots, pump cams, secondary springs, etc.
You want to know why the efi stuff I spent so much money on has sat on the shelf for the past 3 years instead of on my 440? I spent some time tuning the choke and primaries on my thermoquad and got it to the point where any time I drove the car(spring-fall) I could get in the car, give it 3 pumps, hit the key, let it warm for 30 seconds, kick it down and go. The motivation to change to the efi stuff I had is just not there.
Another issue I see is what type of carb to run for what you want out of it. You want driveability, mileage and performance? Then I think you should be looking at spreadbore carbs with a well tuned choke instead of the square bore holleys with the milled choke horn. Really depends on the application IMO.
But you are right, a carb will never adapt and react like an EFI system. That and a port efi never has the wet flow issues which should make start-up smoother.
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Re: Fuel Injection vs. Carburetor BB
[Re: GregCon]
#752133
07/20/10 06:55 AM
07/20/10 06:55 AM
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Joined: Nov 2007
Posts: 5,337
the house on the left.
cogen80
master
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master
Joined: Nov 2007
Posts: 5,337
the house on the left.
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Quote:
Really, if you have a big inch Hemi with 700HP you need to step up to a 'real' FAST EFI type system,not the EZ.
i believe that dual quad fast ez efi on that barracuda pictured is good to 1000 hp or so, you would fall well short of that and should be ok.
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Re: Fuel Injection vs. Carburetor BB
[Re: Mr.Yuck]
#752134
07/20/10 07:02 AM
07/20/10 07:02 AM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
I Live Here
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I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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Quote:
EFI is nice but VERY expensive. any gain in MPGs (and who cares about that) would be so small it'd take you 10 years to get your money back.
i guess you didnt read my post with the cost breakdowns....
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Re: Fuel Injection vs. Carburetor BB
[Re: Cudajon]
#752137
07/20/10 09:50 AM
07/20/10 09:50 AM
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Joined: May 2004
Posts: 12,386
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,386
Taxes & Virus's R-US, NY
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Quote:
In the Sept 2010 edition of "Car Craft" under "whats your problem" they document a problem I've noticed for several years. A cammed engine will throw a wideband oxygen sensor off since the overlap can pass unburned fuel into the exhaust. I started out with a LM1 the LM2 and now run a Autometer wideband O2 sensor in my car. At idle it shows 16:1 (top of the scale) but the instant I touch the accelerator it jumps to 14:1. What this means is that any EFI that goes closed loop at idle is going to be riching the mixture to overcome this seemingly lean condition. This is why all EFI systems come with a preloaded map to get you started. My question on the EZ EFI or any other "learning" system, whats it gonna do at idle.
Lean at idle is generally a lack of back pressure, or it might be the sensor placement too close and not seeing all the exhaust in the collector, or lastly, raw fuel actually getting on the sensor and cooling it, being too rich. The plugs will tell you which way it actually is.
That's why I like the carbs with screw in air bleeds, you can tune the idle mixture to near perfection with them and it doesn't effect anything else.
The efi should have a smoother idle just based on the better metering of the fuel, but if it doesn't and it surges, the IAC, the throttle blades, and the threshold values can be used to sort that out. Typically in that order, so the engine doesn't surge, and it remains nice and steady. That's where, if you have a nasty cam, you might get to where you need timing control as well and step up to full efi. The learning efi will try to adjust itself with the above mentioned IAC, but it still may need some manual intervention.
The cam in my Cuda would not be runable on the street with a carb or ez-efi....It does in fact run super well with the Classic FAST that I use, but it wasn't easy to set-up initially. The learning efi is waaay worth the $$$ for some of us. I am not worried about the payback on it, nor the fuel mileage. Keeping the engine alive & happy and drivable was my goal.
Last edited by Dragula; 07/20/10 09:56 AM.
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Re: Fuel Injection vs. Carburetor BB
[Re: Cudajon]
#752138
07/20/10 09:52 AM
07/20/10 09:52 AM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
I Live Here
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I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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Quote:
In the Sept 2010 edition of "Car Craft" under "whats your problem" they document a problem I've noticed for several years. A cammed engine will throw a wideband oxygen sensor off since the overlap can pass unburned fuel into the exhaust. I started out with a LM1 the LM2 and now run a Autometer wideband O2 sensor in my car. At idle it shows 16:1 (top of the scale) but the instant I touch the accelerator it jumps to 14:1. What this means is that any EFI that goes closed loop at idle is going to be riching the mixture to overcome this seemingly lean condition. This is why all EFI systems come with a preloaded map to get you started. My question on the EZ EFI or any other "learning" system, whats it gonna do at idle.
I dont claim to be an expert, I have one system, but Mopar Rich has installed more then I -
Mopar Rich's reply to the cam question
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