Hi,

Was thinking going EFI and I want someone to tell me General cost.

For example doing a carb upgrade I know I'll be looking at around $900. if I do it all myself.

How much is EFI? for a fun streeter..>? am I looking at less than $1500 for a full kit?

I'm mechanically minded and think I could at least install it all myself if I bought a kit for example etc.

thanks.

In my opinion, if you went with a Megasquirt I system and were a good scrounger, you could accomplish it for a cost comparable to your carb upgrade figure.

My first install was a MS I on my Ramcharger and it cost around $800 before I bought the wideband O2 controller. I sourced the intake and TBI from a salvage '90 truck. I did spend way too much on the fuel pump though so really I could have come in cheaper than I did.

Of course, your mileage may vary. I really do think it's doable for that kind of outlay though.

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It's a Slant thing. Even I don't understand.

1974 Duster, EFI /6 soon to be turbo...

Get that Monkay! Get that nasty thing!!

There is no "Full Kit" For EFI'ng the slant.

even if there were such a thing from fast or accel, you would still have to install and tune. It's much better from an educational and theory / trubleshooting standpoint to do the Megasquirt ECU - just my Feeling. This way if you decide later on to hack out 2 cylinders the MS system can be tuned to your mods - or if you need to put 5 turbos and 18 stages of nitrous on it can be tuned to handle that also.

Many things have to be gathered from here and there, including a few junkyard runs.

Here's what I did on the duster


The hardest part for me was sourcing the manifold / rail / injectors, I happened to fall into that already pre-made / fabricated, Then I could talk with Matt Cramer about getting a MS-II from diyautotune.com pre assembled for my needs.


Have been driving the car every day for 2.5 Years with this setup - No problems.


Greg

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http://www.youtube.com/hyperpack

Have you looked at the FAST EZ-EFI? I've been reading a lot about this for a friend's 360. The whole point of these kits (Holley is building one too.) is that there is no tuning to be had. They are a lot of money compared to the Megasquirt's with limited capabilities, but are definitely impressive.

The biggest problem with the FAST system is that the TBI has set injectors in them, so I don't know if they will be over fueling the little slant since it seems to be based on the 350. Then on the flip side a lot of the big block guys have to buy a whole other TBI to give the system enough fuel.

All this being said, for the money I would still suggest the Megasquirt especially if your are going to run fuel only. I think you can get up and running for about half the cost (still more than most four barrel conversions), but have the capability later if needed.

Here's what I would do if I was going for a budget build for a streetable EFI slant. I'd source a JY 318 TBI off an '88 truck. That one move gets you the throttle body, injectors, throttle position sensor, fuel pressure regulator, and inlet air control valve. Heck most guys throw that stuff away. Say $75.

TBIs run 15 PSI fuel pressure. NAPA has 15 PSI inline pumps for about $60 I think, maybe it was $90. So up to about $165 now.

Use your stock fuel system and build a fuel droid as in the system I made for the Duster. See the 'Kearney thrash' thread in this forum. Max another $50. $210.

Get a Megasquirt I, V2.2 board system. $140 from various vendors - DIY Autotune being my current fav right now and Matt (on this board) works there. $350 total now.

Get a ready made harness from www.auto-nomics.com. It will include everything you need to hook up the MS. $145. Well worth it. $495 now - still not up to a double-pumper.

Back to the JY or online for a Super Six intake manifold. $75-100. Call it $100 and we are at $595.

Since you are so far under your target you can splurge - get an Innovate LC-1 wideband O2 sensor and controller. $200 from DIY-A. We are at $795. The wideband is optional but highly recommended.

You'll need to adapt the TBI to the Super Six mani and rig the throttle and kickdown stuff. You have over $100 from your carb budget to do that with.

I guarantee you, with Megasquirt controlling that TBI, that engine will run extremely sweet and have great drivebility on the street.

I did essentially what is described above on my 360 Ramcharger, and it ran awesome with tons of low end torque using a 360 TBI setup off a '90 Ramcharger. I spent a lot of money for the fuel pump that I didn't need to also, and still I came it at around $800 for the Megasquirt I setup. I later added the LC-1 wideband for another $200.

So, I submit that a basic EFI system can be had with some scrounging and fabrication, for as cheap or cheaper than a high-end carburetor install.

You can upgrade the Megasquirt later to MS-II if you so desire. There's not much limit to you can do with it. I just upgraded my V. 2.2 to MS-II runnung MS2/extra code and it's currently running my kid's Neon.

A few more bucks gets you the v3 board which has even more bells, not the least of which is a complete onboard coil driver so you can run both fuel and ignition off of it, opening up limitless possibilities including sequential. You are still under $1500 at that point.

EFI does not have to break the bank.

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It's a Slant thing. Even I don't understand.

1974 Duster, EFI /6 soon to be turbo...

Get that Monkay! Get that nasty thing!!

There's another potential issue with the FAST system - it has the injectors below the throttle blades. Every time I've seen a throttle body injection system like that tested on a dyno on a single carb intake, the engine ran into major fuel distribution problems - sometimes of the "some header pipes red, some pipes black" sort of major. I'm not sure if FAST has found some way to improve this, but there's a reason every OEM TBI setup has the injectors mounted up high and targeted at the throttle blades.

(To FAST's credit, they also have the EZ-EFI in port form. I have no idea how close their automated map generator would come to getting a good startup map for a slant six.)

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair