I like Mechanical Injection. It's probably not the best choice for a daily driver, but for a weekend cruiser I think it would be great. Slightly non HAMB'ish but here's the one I built for my race car. The throttlebody is a BMW: nice size, two return springs integrated into it, and the throttle shaft sticks out both sides making for an easy hookup to the throttle on one side, and the barrel valve on the other. The barrel valve, nozzles, hoses, and pump are all Hilborn. The thing runs on alcohol, and has incredible throttle response. The only problems are keeping the nozzles clean. They tend to plug up pretty easily (might just be because its a new system). We tapped the head where the electronic injectors went, and put in some br*** pipe reducers to thread the nozzles in. The intake is rather crude, the next version will have individual runners though. Tunning it is really simple. It's a lot easier than any carb I've ever ran... except for maybe the Predator on my old GTO. Just turn the barrel link to set idle mixture, and change one jet for everything else.
You could do a variable timing and lift with a changing rocker pivot. Run a high torque servo to vary the pivot with load, rpm and throttle position. But that would be overly complex and complicated. And I think I get that smiley. I vote Megasquirt. There is a guy out there running bottom 10's in a twin turbo late model chevy pickemup. He's running megasquirt.
i have a neighbor who built a dirt drag big with a subaru engine running a megasquirt and there planning to build more vehicles using it as well, i have thought about running 2 megasquirts system on the same engine, one for pump gas and one for alcohol.
"There are bosch fuel injection systems on late 70's Mercedes 450 v8's. They are plentiful and cheap, and look kinda kool." Cheap, plentyful, 450 V8s, you really are from LaLa land. The only cheap benzos in the rest of the world are 200Ds from the 70s. And I'm not converting to one of those yet.
Wow, this thread's got <i>real</i> interesting for me. I'm hoping to change my truck over from twin AVS's to Megasquirt once the motor is done. Budd, I got one word for ya... "here." Get one, and run the code to have a second set kick in. Not only would I be able to control the fuel, I could also ditch my MoPar ignition amplifier, cam-driven VR sensor, and vacuum can/advance weight timing in favor of spark advance controlled by not only manifold pressure and RPM, but coolant temp, spark knock sensor, and even throw in an integral traction control and rev limiter. There's one in my front yard you can drive home for $200 plus a battery. But I think it has an injector stuck open, 'cause it puffs black.
Point taken, and I don't want to pick a fight here, but... For the sake of argument, your CPU fails, whether in BFE or in your driveway. With a scrounged and adapted system, the CPU is a factory part number away. Call the closest dealership and it's a matter of a couple days on the outside to plug and play. With a Megasquirt, is it that simple? As I understand, there's a whole lot of custom work behind setting up a Megasquirt for your vehicle. And how often does a (modern) CPU fail anyway? dan
I would hope like anything computer related you back-up important information. So your maps should be saved elsewhere. That's pretty much the only real custom thing that would be a big deal. The boxes can be ordered from a number of people already built and shipped out.. Having ordered a factory CPU for my mom's old mini van, it's not as easy as just a part number. It took about a month to actually get it.
LOL why not? Actually, you don't need to plan on buying a brand new $3k lappy. The older ones work just fine, and are actually better cause they tipically have a serial port on them. New lappys typically have usb.
Some junkyard DIY EFI for the Slant Six. Should work just as well on other sixes of similar power and displacement. http://www.slantsix.org/articles/dibiase_efi/efi-conversion.htm http://www.slantsix.org/articles/Efi-Manifold-Construction/EFI-manifold-construction.htm http://www.slantsix.org/articles/bryan_long-fi/bryan_long-fi.htm
Couldn't you find a cheap and plentiful '87 orso Chevy Caprice, Van or pickup and pluck the TBI and sensors from that? Put them on the Hemi and use the ignition too (HemiHeads has the adapter). If you buy the whole car you can scrounge the wiring and computer too! Maybe even the Trans too, with a little bit of help from an aei..dapter kit... At least that's what I plan to do with my Hemi...
http://www.bustedjeep.com/projects/junkyardtbi.asp This is how to do junkyard fi....using junkyard and off the shelf autozone parts...part numbers etc.... good luck.
Installing EFI on a 258 is a lot easier than that - the Jeep 4.0L is essentially the same engine and has a rather decent EFI system from the factory. 4.0L Cherokees are all over the junkyards around here. dan
The MS is a can of corn.. Got two, one in the T, and built one for a twin overhead cam 6 wannabe offy project.. Really--easier than carbs.. I've prolly got a couple hundred hours in carb work, and if I kit one now I've got about a 50/50 chance of makin it work better.. The MS is about 50 hours buildin and figgerin, and it is tuneable out the ***. Everything you kinda guess with on a carb, you nail it with the free tuneing program on the MS. Starting enrichment (choke), Warm up enrichment(Fast Idle) ,Speed density for the air flow (just a va***e thingie), Junk yard injectors and Throttle body with positon sensor from a 351 ford PU, GM Temp sensors (water and air) , RPM from the tach output on the dizzy, Bosch 02 sensor. The build is easy--like an old Tandy kit from the old days..PA
And in this corner... weighing in at two hundred and thirty-five pounds... If you <i>did</i> manage to fail the CPU on a megasquirt, you could always a) have someone overnight you your stimulator (troublshooting board that cables into a CPU), or order a board and have it shipped overnight to you. And now that I think about it, carrying a fuel map on CD in the glovebox would be a pretty good idea. Nothing's troubleproof, but I'd be surprised if this would be a component that would cause a lot of problems. -bill
I'm the one that built Flatdog's EFI system and I've done a couple other Megasquirt installations on small autocross cars. I've put the Megasquirt ECU through a lot of abuse through dyno testing. It's been sprayed with steam and oil, dropped, subjected to enormous vibration, and had large voltages applied where they shouldn't have been and nothing bad happened. The durability of the board is really up to your ***embly skills, it's all solid state and quite well protected against any voltage on the vehicle except for the ignition. It can be made just as reliable as the computer in a new car if you're careful with soldering and mechanically securing components.
Just talked to Kinsler... almost $10000.00 for what I'm looking for! Yes, $10000.00! They even e-mailed me the quote. While I have no doubt their system would work great and would probably last forever, this is unacceptable. Soooo... mega-squirt is sure sounding like the way to go so far. Any other bright ideas?
The answer may be Barry Grant's inline 4 bbl. I haven't seen prices yet but without the intake it should be well less than $1000. Mill and tap an intake, adds 4 ram tubes, and you have 4 port Hilborn look.
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