fuel injection

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There's no off the shelf set-up for a slant. Over at slantsix.org there are a few people running both TBI and multiport injection using megasquirt as a controller. You might check in over there.
 
i am looking for the same thing. a member here showed me to retrofit.com i believe. they have a throttle body version that would work. its pretty much a carb but injected different but would be nice...for a v8. doing throttle body would help out starting and that stuff but wont help performance as much as port or mpfi. with the carb or throttle body in the middle it leaves the two far cylinders (#1 and #6) lean. thats why i am looking for a port fuel injection system. it will probably mean machine ports in the intake and use some sort of computer system to fire it so lots of work but can be done and will be nice. i do not know all this as fact cuz i have not experimented with it yet but it all makes sense and i believe it
 
This one's an example of custom work:

manifold-reg.jpg


It's an early Clifford manifold with bits of bar stock welded on, drilled and reamed to fit Toyota Supra injectors. Fuel rail is just a piece of aluminum square tubing. The throttle body (not shown in this picture) is off a Ford 4.6 Crown Victoria. A later version used a different adapter to flip the throttle body 180 degrees:

coldside1.jpg


If I were doing this over again, I'd skip the fabricated throttle body adapter and gone with an off the shelf Edelbrock casting. That aluminum welding was pretty expensive.

When it comes to off the shelf hardware, Clifford apparently built a handful of EFI manifolds and fuel rails but has no plans to make more; they may still have a couple. There's a guy on slantsix.org tooling up for a set of GM TBI to Carter BBD adapters, too. TBI has the same fuel distribution issues as a carb - I was just dyno testing a Holley four barrel TBI yesterday on a car loaded with EGT probes - but it does give better drivability than a carb. You could also put a set of Extrudabody throttle bodies on a Pierce manifold; then all you'd have to fab up is the linkage and fuel lines.
 
Mopar70Dart said:
thats pretty cool how does the computer deal work though? Dont I need a computer to run the fuel injection?
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Usually. There are mechanical fuel injection systems, but they can be more complicated to tune, if anything.

The computer part is the easy one to find, when you get down to it. I'm using a Megasquirt (and after installing it, ended up landing a job at a Megasquirt seller). I've seen slant sixes run on hacked GM computers, Accel DFI, SDS, and FAST as well, and there are several other possible options. Depends on how much you're willing to spend and what features you need.
 
mat when you get this figured out i wanna know what ever you will tell me. this is what i'm talking about.if this thing works i may get in line.
 
ok so is it sequental where each injector fires at a different time? or is that where they go all at the same time? and what are the advantages of both? i have always liked the seperate kind so each cylinder gets a "mist" of gas rather then liguid but how much would this help?

and where can i look at prices for megasquirt? and what are good competitors to look at what the others are? like i said in another thread this is for my girls future car so proabably wont get something to soon but would like to look at it
 
I'll be sure to post a lot of details on it when it's up and running. I work at a place that's got a chassis dyno so we'll be sure to get it really tuned in.

Sequential times the injectors to the cylinders, batch fire fires them either all at once or in two separate banks. For example, my Dart is wired so the first three cylinders and the back three cylinders alternate firing. Sequential can get a smoother idle and better emissions, and has the possibility of tuning the fuel differently for different cylinders, although tuning a motor cylinder by cylinder is a royal pain. Batch fire is cheaper and simpler to configure - you can just get the thing running off a Lean Burn distributor to control fuel and spark, or even run fuel only and feed it a tach signal off the coil.

I work for a Megasquirt seller - http://www.diyautotune.com - and we have an online price catalog there. For the computer and wiring components, prices can be anywhere from around $400 total if going with solder it yourself kits to upwards of $1000 if ordering a ready made unit with a bunch of extras. The sequential version is expected to be around $600 or so for the ECU when it comes out, add another $100 or so for sensors. The main Megasquirt manual is here: http://www.megatune.com - though it's moving to another server and if it is having trouble you can view a mirror copy at the DIYAutoTune site.

As for what else is out there, I'll divide them into a couple of categories. I may forget a couple of them.

Basic batch fire systems:
SDS - http://www.sdsefi.com
Holley Commander - http://www.holley.com
Retrotek - http://www.retrotekspeed.com/

Some of the more common medium priced sequential systems:
Accel - http://www.accel-dfi.com
FAST - http://www.fuelairspark.com
BigStuff3 - http://www.bigstuff3.com
Edelbrock - http://www.edelbrock.com

Some of these can get pretty expensive, but have lots of features:
Haltech - http://www.haltech.com.au
Motec - http://www.motec.com.au
AEM - http://www.aempower.com

A slant six isn't usually a very complicated engine to deal with, so chances are the ECUs in the third category will mean paying for a lot of features you don't need. Megasquirt is going to be cheaper than most other options, although it was designed as an educational project originally so there's going to be a bit more of a learning curve involved than some of the ones from the medium-priced region. (Though it does get steep again at the high end of the price spectrum, just because of all the features you end up dealing with.)
 
ok sweet. by the looks of things megasquirt is my favorite lol. i will look more into the new sequential set up thanks for all the info madmat
 
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