AMC Eagle Den Forum
The Shop => Altered Eagles => Topic started by: eaglefreek on April 23, 2011, 12:45:31 PM
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When I originally did the 4.0l head swap, fuel injection via Megasquirt was the plan. However I had to move from CO and went with a carb for ease of install. Well since the Eagle has been relieved of daily driver status I thought of revisiting a fuel injection install. I need to repurchase all the parts I originally had for the swap. I have been talking to a guy who has successfully squirted a bunch of Ford 2.3 turbos and is very interested in this since it will open up a huge customer base for him in the Jeep world. Just curious if anyone has one installed and running here. Installation will be quite a bit easier than using an OEM harness and the tuning capabilities will be infinite. He will actually be able to tune mine while I'm driving with my Blackberry tethered to my laptop which will be connected to the Megasquirt. Hoping to get some more power and better MPG.
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Not yet. >:( Want to but just not there yet. It was the initial plan for the wagon but things have been changed a lot, as they normally do. Anyway, go for it and let us know how it turns out.
I do have a question about why the blackberry needs to be in between the laptop and megasquirt though? Is this so later you can only use the blackberry or.... ? Only wondering what the specifics there are. I planned to use a SBC and have a touch screen to modify and view performance on the fly. (and no that is not a Chevy. haha SBC = single board computer)
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The reason for the Blackberry or other smartphone is because I'm in TN and he's in NJ. He can get it fine tuned while I'm driving in TN and him sitting in his living room in NJ linked to my laptop via the internet.
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I see. I read it wrong. I was taking it as megasquirt, blackberry, laptop. Didn't realize you meant it was for remote internet use. Nice idea.
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Ive never heard of the megasquirt. Im nearing the point of getting the fuel injectors for my EFI conversion...Are they strictly high performance? They do sound pretty darn cool though...Im anxous to see what you go with.
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I plug a laptop into my Jetta, and can monitor the engine while my wife drives it. Good for troubleshooting.
There are lots of options for fuel injection right now. There are both port injection and throttle-body injection, and they can be both MAF (Mass Air Flow) and MAP (Manifold Absolute Pressure) controlled. There's a lot to read out there if you're interested.
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Ive never heard of the megasquirt. Im nearing the point of getting the fuel injectors for my EFI conversion...Are they strictly high performance? They do sound pretty darn cool though...Im anxous to see what you go with.
Megasquirt is an aftermarket programmable ECU. You can go wit a an OEM Jeep computer and harness but I wanted to get away from using the stock cumbersome harness. Also there may be some HP and MPG left on the table with a stock computer. If you wanted to goe with the Jeep ECU ,you can get a harness from Hesco for $498 but you will also need to either put a crank sensor in, either in your bellhousing which requires changing the flexplate or buy the Hesco damper crank sensor kit for $289. The assembled Megasquirt with harness will run about $650. The guy selling the Megasquirt wants to get away from the distributor and use Chevy LSx coils for better performance and MPG. I will have a coil for each plug but that will add $100-$200 depending how good of a deal I could find on them. The reason I'm going this route is because I don't want to have to mess with the Eagle's factory harness and have another ball of wires for the EFI.
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The base stays , dummy cap. I had seen this done on a Javalin at a Mopar show ( yeah they were nice enough to let AMC in on it ).I didn't understand it and had to stop back by the car later when he was there. Good Point Casper : ). I guess you could go with an elctric pump too. I saw a car with a reserve tank like thing between the seats , and somehow pressure would force oil through the engine before start up, not sure why?? maybe it was just an "overdone" application.
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There are pumps made to pre and post lube engines, as a way to prevent wear when starting and (they claim) heat damage to bearings after shutdown. These are typically setup to prevent starting until oil pressure is at running levels and they run maybe 5 mins after the engine is shutdown while the temp lowers. This might have been what you saw GoPac.?
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I'm one step closer. I went to the junkyard yesterday and picked up the coveted 99+ 4.0l intake manifold, fuel rail and throttle body from a 91-95 4.0l and a throttle cable and bracket. I need to see how the TV cable, aka kickdown, works on a YJ with a 4.0l and a tf999 transmission. I'm hoping I will be able to adapt it to my 998 easily.
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A couple things have changed, but still going with the Megasquirt which I will call MSII from now on. I had a friend call me and give me an opinion of the guy I was originally going to purchase the MSII stuff from and decided not to use him. My friend is going to walk me through it instead. No coil packs. He said the distributor and MSD I have will be fine. I bought the MSII and harness from diyautotune.com for $502 shipped. The harness comes with a connector to the ECU but I will have to solder on connectors for the injectors, sensors, etc. I received it in the mail today and will start on the harness probably during the week. I need to finish my bumper project first.
(http://img.photobucket.com/albums/v637/svoman2300/utf-8BSU1HMDAyOTItMjAxMTA1MDctMTgzOS5qcGc.jpg)
This will be fun. ;D
(http://www.finkbuilt.com/static/images/articles/megaWiring.gif)
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Progress, sweet!
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Are you going to be running batch or sequential fuel injection?
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Batch. Sequential is quite complicated and not worth it ,in my opinion, on a low revving engine like the ours.
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My brain is smoking just looking at it ;D I would love to put that on my eagle but the jeep EFI and ECM Ill be using is already proving to be a challenge for me. I cant wait to see how it turns out though...Looks like some pretty awesome injectors!!
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I went and had the Eagle dyno tested this morning to get before numbers. It was on a Dynojet dyno and averaged 135hp and 192 ft lbs. It was actually running a little lean so there is more HP available out of the Motorcraft carb. Doing the industry standard of 20% drivetrain loss from an auto transmission, that translates to 162hp and 230 ft lbs of torque at the flywheel. Hopefully in a few weeks I will be up and running with the MS and EFI to get the after figures. I will post the dyno graph later on today.
(http://img.photobucket.com/albums/v637/svoman2300/utf-8BSU1HMDAzMDYtMjAxMTA1MjAtMDkzOC5qcGc.jpg)
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How are you able to run a 4 wheel drive vehicle on a rear wheel dyno?
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My Eagle is in 2wd 99.999999999999999% of the time on the road. No difference on a dyno.
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Actually those numbers are comparable to a Jeep 4.0L. The HP numbers I've seen online for 4.0L's are similar but less torque than mine. My engine is a stock unrebuilt bottom end from an 81 Eagle, 4.0 head, Comp cams camshaft. Since the 258 had 110 hp from the factory I would assume a stock Eagle would put down numbers in the 80's or 90's.
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My Eagle is in 2wd 99.999999999999999% of the time on the road. No difference on a dyno.
I forgot many Eagles can be switched from 4 wheel drive to 2 wheel drive. Do you know if there's anyway to chassis dyno a full time 4 wheel drive like my 81 SX/4?
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Yes, you will have to find an AWD dyno. Do some searching on the net for your area. Also find a performance shop that specializes in Subarus and they may know if there is an AWD dyno nearby.