I have my new website setup on GoDaddy. I have added a section on plumbing the air intake. Please let me know if you have a problem accessing my website. HiTechEngineering.net
Regarding the internal air injection rails in the intake manifold (these are part of the Exhaust Gas Recirculation system which I have discarded). I've now plumbed them directly to the Auxilliary Air Valve. This is the stock one that's operated by coolant temperature and I think it was no longer used after 1979 or was replaced by a different type of controller. Its purpose is, of course, to bypass air around the throttle valve when the engine is cold thus raising idle speed.
I decided to run the AAV into the internal air rails on the theory that the AAV needs to go to the common manifold vacuum anyway and this eliminates the need to plug the internal air holes. And I need the extra manifold vacuum port for the MAP sensor in Megasquirt.
As far as the cold start injection valve goes, (I assume this is the one that injects extra fuel) this is unecessary and can be dispensed with as Megasquirt will simply deliver richer AFR by telling the main injectors to deliver more fuel.
The Bosch electonic injectors I'm using from a Ford 5.0L fit in the stock locations fairly snugly without modifications, but on my engine the injector holes are in the head, not the intake manifold. The hole size may not be exactly the same for applications other than mine.
I am figuring that my 4.5L engine should be producing 220 gross horsepower (at the crankshaft) when all the mods are made (the book says 190 HP stock at the rear wheels) and 19 lbs/hr should be about right for a 220 HP engine. When I switch to E85, I'll need to get bigger ones. Look here to estimate injector size for a given engine: Injectors and Fuel Supply
ought6, I think I'm going in the wrong direction. SInce I've gotten so many parts removed from the top of the engine and cleaned and painted (or polished) I just went a little overboard and now nearly everything is out of the engine compartment for detailing except for the long block itself. Oh well. It'll be awhile longer before it's done but at least it will look nice after 30 years of grime is erased.
I am figuring that my 4.5L engine should be producing 220 gross horsepower (at the crankshaft) when all the mods are made (the book says 190 HP stock at the rear wheels) and 19 lbs/hr should be about right for a 220 HP engine. When I switch to E85, I'll need to get bigger ones.
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ought6, I think I'm going in the wrong direction. SInce I've gotten so many parts removed from the top of the engine and cleaned and painted (or polished) I just went a little overboard and now nearly everything is out of the engine compartment for detailing except for the long block itself. Oh well. It'll be awhile longer before it's done but at least it will look nice after 30 years of grime is erased.
HBar,
I think you will have plenty of room on the 19lb injectors even with E85. My 450 is getting no where near even %50 duty cycle on these injectors. If you find you need more flow through the injectors in the future you can just bump up the fuel pressure which should also have a positive impact on fuel atomization. The 19lb injectors are just about too big at 4 squirts per cycle alternating.
I was anxious to get my 450 running so I didn't do much cleanup of the engine compartment when she was apart. This has lead to a lot of repetative work going back and cleaning things up later. I like your approach of doing it right the first time instead of putting it off until later. I am constantly "prettying up" the engine compartment to make her more presentable when I pop the hood. Much better to take your time and do it right than to rush.
I have plenty of reliable webspace on GoDaddy now. I would be happy to host any pictures any of you guys would like to e-mail me.
HBar,
I think you will have plenty of room on the 19lb injectors even with E85. My 450 is getting no where near even %50 duty cycle on these injectors. If you find you need more flow through the injectors in the future you can just bump up the fuel pressure which should also have a positive impact on fuel atomization. The 19lb injectors are just about too big at 4 squirts per cycle alternating.
I have plenty of reliable webspace on GoDaddy now. I would be happy to host any pictures any of you guys would like to e-mail me.
That's good to know about the injectors from your actual usage. Save me about $200
I'll email you a handful of pix in the next few days. Thanks!
Update: It's been in the 90's and raining/storming sporadically most days for the last few weeks here in Illinois and I don't have a garage to work in. No progress.
Been gone a long time as I had a boatload of non-automotive stuff to attend to in the past few months. I just started putting things together, running wiring and putting the EDIS together and I started to remove the distributor and realized I don't know if it's possible to do so.
Can I safely run the engine without the distributor (I have a plate to cover the hole) or does it need to remain in place? The manuals I have naturally don't cover this and I can't tell from the drawings if the distributor gear is required to keep other things next to it in place.
You can run the w/o the distributor w/ no worries. The gear that drives it will just spin in it's housing w/o issues.. hell, figure a fraction of a HP saved in just eliminating that ;-)
Look forward to seeing/hearing how things are coming..Good luck with it!
Ok, another lurker here who's been considering the same thing.
I have a question for oughtsix: Have you gotten any preliminary fuel mileage numbers? How is it comparing to the K-Jetronic fuel efficiency?
I currently don't even own a MB gasser, but having been driving a 300SD for a couple of years, I've gotten used to MB engineering, and like the durability of their cars.
With fuel prices being what they are, and with the diesel being as temperamental as it is in the cold, I've been eying the commonly available gasser MB's on craigslist, as well as the spare MegaSquirt I have sitting here...
Thanks for sharing all your experiences, and for any information!
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-Josh
'82 300SD 296k mi
'82 500SEC euro 153k mi (new project) It's alive! images Testing the 'cheap Benz' axiom, one bolt at a time!
Oh well. It'll be awhile longer before it's done but at least it will look nice after 30 years of grime is erased.
Linear Mode
