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Old 02-24-2011, 01:45 PM
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Edelbrock MPFI vs. Howell TBI Fuel Injection

Is the Edelbrock MFI system worth the extra money over the Howell system using a stock 2bbl manifold?

Who has t he Edelbrock MFI system?
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Old 02-24-2011, 01:53 PM
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They are entirely different animals. If you go with a MPFI system, you are replacing your stock intake manifold.
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Old 02-24-2011, 01:56 PM
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I know you replace the stock manifold with the Edelbrock. I just wondered how the performance of the Edelbrock system compares to the Howell with the stock 2 bbl manifold. Is it worth the extra money? $1,350 for Howell and $3,100 for the Edelbrock.


Quote:
Originally Posted by FSJ Guy
They are entirely different animals. If you go with a MPFI system, you are replacing your stock intake manifold.
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Old 02-24-2011, 02:26 PM
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Quote:
Originally Posted by CommanderChaos
Is it worth the extra money? $1,350 for Howell and $3,100 for the Edelbrock.

Nope !!!
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Old 02-24-2011, 02:39 PM
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Hmmm....I was hoping you could elaborate on that a little bit. What experience do you have with each of the systems?

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Nope !!!
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Old 02-24-2011, 02:40 PM
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I would use the Howell becuase from what i understand and have read it uses Gm parts which would make them available just about anywhere. I also like the ezefi see link below

Rich is a regular on the Moparts board
http://fastmanefi.com/
http://www.youtube.com/watch?v=FW6ZO...eature=related

http://www.youtube.com/watch?v=tIzLh...eature=related
I like it because it is a learning system it makes changes on the fly automatically to give you the best performance and mpg
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Old 02-24-2011, 03:11 PM
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I guess you have to ask yourself: If I dump three grand worth of edelbrock fuel injection into my rig, will it then be worth at least $3001?
I know mine would not...
Will a newer MPFI system make that 40 year old engine design run significantly better than the TBI?
Probably wouldn't be able to tell the difference without checking your bank ballance.
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Last edited by Walt : 02-24-2011 at 03:18 PM.
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  #8  
Old 02-24-2011, 03:20 PM
FSJ Guy FSJ Guy is offline
 
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There was a guy in Colorado that put the Edelbrock system on a 401, IIRC. He absolutely loved it.
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  #9  
Old 02-24-2011, 03:24 PM
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Here's another way to look at it...
$3000 will go a long way towards transplanting a modern drivetrain into the jeep.
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Old 02-24-2011, 03:38 PM
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My understanding - the main motivation in modern cars for MPI over TBI: emissions. Certainly the MPI will give you better power and economy than TBI, since you have better mixture control, cylinder by cylinder. But I expect that, in terms of fuel economy, you'll never make back the cost difference, and the difference in performance will be minimal.

Plus the Howell stuff is made of commodity parts (except for the ROM), so parts availability should be no problem.

The Howell stuff is just a hacked GM system. I think they don't even offer spark control, so their product is basically an electronic carburetor. I recall that you can modify the Howell setup to provide spark control - somebody here has done it. An alternative is to go Megasquirt: then you're looking at really cheap, and you can add spark control, coil-on-plug (distributorless), whatever you want. Last I looked, the Megasquirt won't do sequential MPI, but maybe it will now. MPI is still possible, even without the sequential feature.
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Old 02-24-2011, 04:32 PM
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I'm running a Howell system and it does everything I would want it to do. Could I eek out another mpg w/ spark control, maybe. I use my truck as a winter driver and even hooked up a cheapo remote starter. Nobody can believe it when I press the button from 50 yards away and it starts right up. I personally could never justify the Edelbrock system. I needed the other $2000+ to put into other areas of my truck, like lockers, tires, interior, a/c, etc...
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Old 02-24-2011, 04:33 PM
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Oh, that's right, howell doesn't control the spark. Now I remember why I didn't consider them for TBI.
If you're going to all that trouble, definitely get a GM TBI based system that controls the spark too!
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Old 02-25-2011, 02:32 AM
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Quote:
Originally Posted by tgreese
An alternative is to go Megasquirt: then you're looking at really cheap, and you can add spark control, coil-on-plug (distributorless), whatever you want. Last I looked, the Megasquirt won't do sequential MPI, but maybe it will now. MPI is still possible, even without the sequential feature.

FYI-Megasquirt 3 will do squential injection and COP and almost anything else you can think of. It's definitely diy (steep learning curve) material but I wouldn't have it any other way, best way possible to learn EFI imho....if your not in a big hurry.

Mike
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Old 02-25-2011, 07:09 AM
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The Edelbrock system is better for high-horsepower engines and engines with heavy mods like turbos, nitrous, and superchargers. It's more flexible and adjustable. If you plan on eventually adding a really wild engine the Edelbrock system is the way to go. It's really more of a race system.

The Howell system is likely a better system for the majority of FSJs. It's more of a street system. It's simpler to install and easier to use but it won't support a big HP engine and doesn't really have the adjustability that the Edelbrock system has.

You will see virtually no performance difference between MPI and TBI in most cases. Assuming that both systems are functioning properly.
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Old 02-25-2011, 09:38 AM
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Hey Twinpinion where you been?
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Old 02-25-2011, 03:21 PM
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Or ditch both and do like has been suggested and get a gen two or three LS based drivetrain and have the MPG and power difference to justify the cost
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Old 02-25-2011, 03:56 PM
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Quote:
Originally Posted by cable97526
Or ditch both and do like has been suggested and get a gen two or three LS based drivetrain and have the MPG and power difference to justify the cost

Peeshaw! What's the fun in that?!!
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Old 02-25-2011, 04:35 PM
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Quote:
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Hey Twinpinion where you been?

Workin'!
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Old 02-25-2011, 05:09 PM
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Quote:
Originally Posted by Twinpinion
The Edelbrock system is better for high-horsepower engines and engines with heavy mods like turbos, nitrous, and superchargers. It's more flexible and adjustable. If you plan on eventually adding a really wild engine the Edelbrock system is the way to go. It's really more of a race system.

The Howell system is likely a better system for the majority of FSJs. It's more of a street system. It's simpler to install and easier to use but it won't support a big HP engine and doesn't really have the adjustability that the Edelbrock system has.

You will see virtually no performance difference between MPI and TBI in most cases. Assuming that both systems are functioning properly.

Good post, lots of truth there. Only thing I would add is that Edelbrock lists their setup as "up to 450 hp". To go above that you're going to be looking at different injectors, fuel pump, fuel lines, etc. So you're paying for a bunch of parts you're not going to use. I've been very happy with the Edelbrock on a 400ish hp 383 that I built for a friend.
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Old 02-26-2011, 07:55 PM
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Why stick with just those two?

There is Megasquirt which isnt so much a kit, but more of a turner. You can then piece together a kit of your liking. Kinda like the idea of being able to keep the carb on and data-log information, til I'm ready to swithc over to EFI. Here is a website to get an idea from: http://www.diyautotune.com/ This is pretty cheap and all the software is free. You can control spark, fuel, and timing with this guy.

The next one I have come across is from FAST, which is auto-tuning to the vehicle or you DIY type. Check em out. http://www.fuelairspark.com/ezefi/default.asp This kit runs around 2000 I think. Just found these so I need to do more reading on it.

Just my .02
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