Ok, well here goes I think I am gonna start building a mega squirt for my Slant, I was very close to selling it but I have decided to keep it. Anyway, I would like to know where everyone is in their megasquirt projects. I am planning on running a 2 barrel TBI turbo system with a custom made tube intake (with equalish length runners). That's the plan anyway. My question is, does anyone have a megasquirt built (have all the parts and not the ambition) they want to sell me or trade for say a super six intake and carb?
Another question is, assuming I can't find anyone to sell me the stuff, where do I go to buy everything, and what should it run me?

But... before I do has anyone been able to find or gather more info on running a complete tbi system off of Junkyard parts ecu, sensors and tbi? There was some talk of running a GM 3.8 ecu and sensors with a 318 or 360 throttle body.

I hate when I do this, but has anyone seen or run a car with two throttle bodies? That would make it easier to get the fuel to flow evenly to 1 and 6.

FYI Jeti,
If you log-in as a member you get "edit message" and "delete message" buttons which allows you to change, add, delete your messages all you want.
Give it a try,
DD

Lou and Pierre were messing with the Megasquirt system, I think.

-D.Idiot

Check out this recent thread - http://www.slantsix.org/forum/viewtopic.php?t=6126

Links are there to more info on this site and the MS site. I think I'm the only 'squirted Slant so far.

I would recommend MP-EFI if you do a turbo since with the "dry" manifold you will not have fuel condensation issues. I am working on a second MS for my other Dart and MP-EFI with turbo - probably 6-8 months away.

About $200 will buy you the complete ECU kit, and then you need injectors, TB, sensors...

I will be using a stock 4.6L Mustang TB (takeoff) since they are dirt cheap on Ebay (got a 2001 model with 6k miles for $25 with TPS sensor).

Check www.turbobuick.com for turbos, GN injectors, etc...

Lou

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Home of Slant6-powered fun machines since 1988

Think this would work with the setup that Bob did the write up on?

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'74 Duster w/ HEI ignition, beat to snot suspension, A904, 8.25" 3.55 SG rear, still being tuned up and gets 17 MPG

Know how they always build a better idiot? That's me

Yes. You will have to make a custom adapter plate to fit your manifold, though.

Lou

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Home of Slant6-powered fun machines since 1988

About the custom plate.... If you use a gm (holley bodies use same pattern, I believe) throttle body with the 3 bolt pattern, you can buy adapter plates for tbi to standard holley 2 or 4 barrel bolt patterns from howell efi. www.howell-efi.com I bought a complete howell kit and put it in my duster. Sometime in the future I plan on removing the gm computer and installing a megasquirt, but for now I am tinkering with the gm system.

If you are going to stick with tbi, do yourself a favor and don't buy a pre made gm style kit. The only item you are really paying for in the kits are the "custom tuned" proms to your engine. If you get all junkyard/used parts (throttle body/injectors, sensors, harness) and mate it with a megasquirt comptuer, it will be much much cheaper and easier to tune.

I'm not sure why I have heve never logged in here but I guess it just worked out that way. Maybe sometime in the future I'll do that. So Pierre what exactly are you running on your car as far as donors for sensors, throttle body, computer etc... You say you're going to be moving to a megasquirt so I would guess you are using a GM computer right now? What mods have you made to the computer/sensors to get it to work and how well does it run?

I have read all those posts before, and I am a bit worried about the cost of building the manifold for an mpfi system. A quick question about it as it’s been a while since I read all of Bob's info. If I ran a Megasquirt controller and MPfi setup similar to the setup on Bob's write-up, is there a need for a crank sensor, or is it a batch fire system? I believe that Bob is running a batch fire system as opposed to sequential mpfi. Will the Megasquirt work with a batch fire mpfi system? I think the construction of the manifold/fuel delivery system would be lots of fun. What sort of HP are people getting from their FI setups?

Heres a nice one, anyone have any opinions on this, it looks like it would cost very very little to make a fuel rail this way.

http://www.sdsefi.com/techrail.htm

That does look like an affordable way to make a rail. I'll post details on my manifold/rail once it's done.

Bob is running batch fire, and the MS will only drive a batch system, so no need for a cam/crank sensor - just uses ignition trigger.

Lou

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Home of Slant6-powered fun machines since 1988

Jedi, the howell kit comes with all GM sensors, gm throttle body, a gm computer (1227747) and their own harness. It includes coolant temp, o2 (heated o2 is $60 extra), map, tps, iac... it is a fairly complete setup. There is a ROM chip in the computer that they "custom calibrate" to your engine. All parts other then the computer are brand new, hence the cost of the kit with heated o2 is $1260.

My setup runs... eh, not so bad but not perfect either. Last time I measured it got 18 or so mpg highway. The only downside to it is it doesn't idle so well, the idle ramps up and down quite a bit. There is also a terrible bog off idle if you stomp on it, but steady acceleration is fine. Each of those two issues is likely due to their "custom calibration" not being custom enough, hence the need to fiddle around with the rom or change over to a megasquirt.

BTW, if your going to get junkyard parts, heres a hint, remove the harness and leave all the sensors still attached to the harness. That way, or at least this is how they do it at the Pick N'Pulls I go to here, they charge you for a "Harness + accessories" which is like $30, instead of a harness, and each sensor individually. They want like 20 or 30 for a map alone. Crazyness. Last time I checked a complete throttle body was $38.

Jedi,
The MS system is batch fire as Lou stated. There are two types of batch fire systems, Mass Air Flow (MAF) and Speed Density. MAF set-ups are self-calibrating over a pretty wide range (as I can attest to with my turbo), while factory speed density systems are not. These are calibrated at the factory for a specific engine and performance level and do not adapt to different engines or even upgrades to a factory engine. The advantage of the MS speed density system is that it is calibrated by the user with a laptop computer and can be calibrated over a very wide range.
If you are going to go for a turbo I would agree with Lou that multi-port is the way to go. As far as the fuel rail is concerned, the one described in that article does sound like a fun project. However, I decided to have mine built, and the matching manifold machined professionally, because, as the article you linked states in the first paragraph, alignment is critical to avoid leaks. Remember there is a lot of fuel pressure at that point. I also didn't want to take a chance of messing up my Offy intake manifold and I also wanted to angle the injectors at the valves.
Bob D http://hometown.aol.com/bbobbias/myhomepage/photo.html