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GREG K
Dodge Dakota
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8/22/2006
09:51:12
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 Subject: CARBURATION ON A 4.7
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IS IT POSSIBLE TO MAKE A 4.7 CARBURATED AND IF NOT HOW HARD WOULD IT BE TO GET THE 4.7 IN A 1992 DAK R/C SPORT. I MEAN WITH WIRING HARNESS AND EVERYTHING AND WOULD IT BOLT UP TO THE TRANSMISSION..
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N56629
Dodge Dakota
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8/22/2006
10:42:24
|  RE: CARBURATION ON A 4.7
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It's all possible, it's more a question of why you would want to go to so much work. Just to begin with you would have to design and build a new intake manifold to with a carb. You can get a carburated 5.7 crate engine.
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jayb
Dodge Dakota
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8/22/2006
11:36:37
| RE: CARBURATION ON A 4.7
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or you could go with a 5.2 and carb it. that has way more build up potential than the 4.7L. i highly doubt anyone makes a intake for a carb for the 4.7L.
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911mike
Dodge Dakota
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8/22/2006
12:17:09
| RE: CARBURATION ON A 4.7
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Greg K , In case you were thinking of a
carburator for simplicity purposes instead of
fuel injection, dont forget the 4.7 block doesn't have a distributor either, each spark plug has it's own coil pack so the ignition is computer controlled like everything else.
at a minimum an intake manifold would have to be engineered & fabricated, the heads propably dont have any heat riser passages so cold weather operation could be a problem too.
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Mr. Happy
Dodge Dakota
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8/22/2006
14:24:00
| RE: CARBURATION ON A 4.7
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Not to mention all the error codes your engine computer would be spittin at you. You'll have to replace the injectors with resistor networks so the computer thinks they're still in circuit. Same with all the O2 sensors, MAP sensor, IAT, air bypass valve, TPS, etc. As N56629 said, so much work.
Emissions testing at the OBDII connector? Some tests will always come up "NOT READY".
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jayb
Dodge Dakota
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8/22/2006
14:28:33
| RE: CARBURATION ON A 4.7
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no reason in the world to do such a rediculas modification.
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Rob C
Dodge Dakota
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8/23/2006
01:51:39
|  RE: CARBURATION ON A 4.7
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NO! It's not feasible and just about impossible. Why would you even think of doing such a thing? Fuel injection is considered a good thing.
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N56629
Dodge Dakota
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8/23/2006
06:46:04
| RE: CARBURATION ON A 4.7
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Just a couple of points to the detractors. Greg may not have emmissions tests so trouble codes are irrelevant. There is no reason a distributorless ignition won't work with a carburator. The carburated 5.7 has much the same ignition system as the 4.7. Fuel injection might be a good thing but old school is more fun.
The best reason for Greg not to attempt this is that he felt the need to ask the question in the first place. Those people that might have a chance of pulling this off would have been telling us how they were going to do it and not asking if they could do it. With money, time and skill there is no reason this couldn't be done.
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huh ?
Dodge Dakota
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8/23/2006
15:07:02
|  RE: CARBURATION ON A 4.7
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Less power = more fun ?
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jayb
Dodge Dakota
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8/23/2006
18:43:31
| RE: CARBURATION ON A 4.7
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yea man, you get MORE power for fuel injection, smoother operation and the powerband itself is better. carb'd engines either run low end power with no top end or vise versa. there's a reason why a old 160hp 318 can pull a camper that our newer mag 318's can, except our top end is way better on the new motors.
and btw, if you wanted a carb'd beast as a toy, there is MANY other better vehicles to screw with.
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N56629
Dodge Dakota
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8/23/2006
21:05:28
| RE: CARBURATION ON A 4.7
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" btw, if you wanted a carb'd beast as a toy, there is MANY other better vehicles to screw with"
Who gets to decide what is the best vehicle "to screw with?" There are a number of members here that have gone carb and some went both carbed and big block. One thing is for sure, they didn't sit around debating the pros and cons of carb vs. injection. People do these thing because they want to not because someone told them it was the optimum thing to do. If we all made the optimum choice we would all be driving the same vehicle whatever that may be.
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Rob C
Dodge Dakota
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8/23/2006
23:39:29
| RE: CARBURATION ON A 4.7
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Carbs can make very good power but, they're lousy for emissions and driveability through various temperture ranges plus they usually get worse gas mileage compared to fuel injection.
N56629, I don't know what your point is? What distributorless ignition is Greg supposed to use? You know there's no off the shelf system designed for the 4.7 and computer DTCs make a big difference. Do you think the PCM will just ignore the fact that it's getting 8 injector and 8 coil failures thousands of times a minute? You'd have to engineer everything including the entire fuel system since you can't run a carburetor on 49 psi. Eliminating the PCM is out of the question because it controls so many systems in the vehicle.
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GraphiteDak
GenIII
8/24/2006
00:46:04
| RE: CARBURATION ON A 4.7
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He could always find a way to HACK in a shaft form the one cam shaft to the outside to drive a HEI distributor. Then all he would need is a carberator on a fabricated intake and it would run.
However, I would be more interested in using the PCM and wiring harness.
It's a long and slow process for me as I can buy parts, but once I get the 4.7 running in my 1974 Duster, I'll have plenty of pictures and a how-to to share :D
But it wont be a carb setup. I've already got the computer and wiring harness for it.
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N56629
Dodge Dakota
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8/24/2006
06:37:08
| RE: CARBURATION ON A 4.7
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Rob, you should be able to use a stand alone ECU to control the ignition system. Converting the high pressure fuel system to a low pressure one would be one of the easier problems to solve. My point is, there is a way to do most anything. I didn't say it would be easy. People said you couldn't put a 5.7 in a Dakota but then they didn't try it either. Now it's been done and being done. If you say it can't be done, someone is going to go to the trouble of proving you wrong.
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Old Dak
Dodge Dakota
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8/24/2006
10:53:15
| RE: CARBURATION ON A 4.7
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The rodders are much more willing to try to be defferent that most of you reading this. I see quite a few northstars and ford 4.6/5.4 running carbs. These guys have blended distributerless ign. and carbs for a number of years now. Even the ricers know how to use standalone managment systems. Screw stock, Mod it.
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GraphiteDak
GenIII
8/24/2006
14:30:29
| RE: CARBURATION ON A 4.7
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"If you say it can't be done, someone is going to go to the trouble of proving you wrong."
You said it!
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Rob C
Dodge Dakota
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8/24/2006
19:22:41
|  RE: CARBURATION ON A 4.7
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Where exactly did I say it can't be done? If you go back and read carefully, I said whoever does it would have to engineer just about everything. Converting the stock fuel system to a low pressure system is only easy compared to engineering the ignition system, keeping the PCM from going into "limp home" mode and fabricating a completely new intake manifold plus throttle linkage and getting all of this to work effectively.
Different just to be different isn't better and in this case, definitely not better.
Giving examples like people carbureting their Ford 4.6/5.4 is like apples and oranges. Open up a Summit Racing catalog and there's tons of stuff for Fords even more for Chevys but, out of that thick catalog, you might find a handful of pages with stuff for Mopars and of those pages there's mostly parts for 60's and 70's Mopar engines nothing newer than 30 years old.
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clint
Dodge Dakota
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8/24/2006
21:12:54
| RE: CARBURATION ON A 4.7
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yeah thats pretty shisty how they do that. EVERYTHING is for chevy. i vow to never "through a chevy 350" in anything. its the most common motor to do anything with. i hate it. dose anyone know of a good place to find parts for our 5.2s, 4.7, and 5.9s?
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Rob C
Dodge Dakota
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8/25/2006
00:43:41
| RE: CARBURATION ON A 4.7
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Yeah, KRC Performance does a lot with Magnum engines:
http://www.krcperformance.net/newcontent/home.html
So does the Fastman:
http://www.thefastman.com/index.asp
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N56629
Dodge Dakota
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8/25/2006
06:40:23
| RE: CARBURATION ON A 4.7
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" fabricating a completely new intake manifold plus throttle linkage and getting all of this to work effectively."
The intake manifold seems to be the only thing you are right about but then I was the first one to say so. His truck already has the throttle linkage in place.
If you check out KRC you will see that fabricating an intake manifold is not all that difficult. For those with experience in engine swapping and racing such things are not all that uncommon.
When it comes to this kind of stuff, who cares what Summit Racing has to offer.
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daddio
Dodge Dakota
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8/25/2006
08:54:20
| RE: CARBURATION ON A 4.7
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with enough money, tools and knowhow you could put a V-10 in a dam Geo Metro.
if anyone would want to waste their time with something like that but, you get my drift.
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