Weber 750 & Megasquirt ECU

[brlcla]

The hydrospace ECU is the stock walbro ecu.... the yellow (140) and red (160) are just chipped versions of the walbro. To my knowledge (which is very limited) I do not think they have those modes as they control the engine only unlike the Bosch system which ties all the systems of the bike into one control unit.

[Friendly]

http://www.polarisfiles.com/forum/lo...php/t2150.html
Brent ,
Here is some discussion about in on another forum. It may help

There is another ECU , I think its called Hot Seat that is used in the ATVs and Razor that claims some modes for power(maynot be for the weber engine. ) If the Megasquirt will do what it is designed to do, I think it will still be the best priced replacement the Weber.

The manufacturer states it is NOT FOR AIRCRAFT use, of course. It is also not for use on vehicle which may have to pass certain emission standards. Once we have a Megasquirt setup, it should be easy to have one of the Megasquirt dealers build one with our options already installed. Then it will be plug and play.

[Friendly]

Here is an UPDATE;
I completed the Megasquirt II a short while back.

I began removing the Weber harness and selecting the wires that I would need for my wiring harness. I need to buy a laptop for tuning the ECU to the engine once that is done.

I have started the Bell-housing Layout that will replace the Rotax C box adapter plate. It will also include a cavity in the back for a 1/2 by 7 1/2in diameter flywheel in the rear as John from Rototech has remarked that the flywheel is necessary.

I have elected to take my ECU to the next step of COP and Sequential injection which means I will have to open it up to make the modifications. It will also give me some additional input outputs for other equipment if needed. I will take some pictures of the wiring I remove from the Weber. I estimate it will close to 12lbs of wiring removed.

The new bell housing will have to be finished before installation of the motor to the test stand. I will do my best to have it finished for July the 4th.

1-Bell-housing Layout, this is on a 2in thick 6061 slab.

[WHY]

Hey Mark

Out of curiosity where did you get the billet and what was the costs, one heart attack or two !!

PS got the harness wiring on the inside of the cockpit finished today, think the Microsquirt has the COP and sequential programmed into an option.

[Friendly]

http://cgi.ebay.com/ws/eBayISAPI.dll...m=140471199332

There's one left, Friends don't let friends heart attack alone. It is more than I needed. I get too impatient at times.

[WHY]

Hey Mark

got the last one, thanks for the info.

Tony

[WHY]

Well Mark

I'm out in the engine compartment and the wiring is going pretty good, if you look 'REAL CLOSE' you can see where I have put the 2 "inline" fuses right at the fuel injector plugs (there black so a little hard to see). Just about had the "Fred Sandford" big one a couple of days ago though. Was putting in the LAST wires for the fuel pump on the inside wiring and happen to pick up the pump laying in the floor board and read the fuse load data on the pump and it was "P A N I C T I M E " . Had been following the info in the Microsquirt book and they show the fuse for the fuel pump as 10 amp so all is well and good. The contact pins in the cannon plug connector are for # 16 guage wire (you can get a # 14 in if you are real careful) and this make the pins at 10 to 12 amps----ok ssoooooo I look at the Walbro pump and it says FUSE WITH 20 AMP FUSE !!!!!!!!!!!!!!!!!! I can tell you that was not a good feeling, standing there under the glow of a 1000 watt DUMB A$$ spot light. After several LONG MINUTES that light went out and the little 40 watt idea light came on. I realized that I was not using 2 contact pins in that connector, so I parralled 2 pins using 16 guage, saved my butt, however I had to unwrap "EVERYTHING" from the connectors all the way back to and including the fuel pump relay in the fuse block, it only cost me a whole day of "fun" sure glad I enjoy this. Went back and done some more reading on that Walbro pump, says it can feed a 500 horsepower engine, don't think I really need this much pump. Wonder if I can find a more appropriate size pump, like a in-line pump for a bike ????

More later

Tony

[WHY]

well, it just doesn't pay to panic or get in a hurry, got to thinking about my fuel pump wiring fiasco and the fact that Microsquirt schematics show the fuel pump fused at 10 amps and realized that although I am now wired to feed a 500 hp pump I did not need that kind of wiring. In a few words, I was not "under wired but over pumped". Got to adding things up and come to the conclusion that this engine should not use much more than my 0-200 Cont. which would use from 6 to 7 gph, so rough that out to 24 to 28 lph and double that for safety room and you are lookin a around 50 lph or 14 gph. This Walbro pumps 225 lph free flow. Paid $120 for it with the mounting kit plus freight, it's for sale $75 plus freight.

Am now looking for something from a bike or ATV that does "around" 25 to 45 gph". Looked on the Microsquirt forum and found this has been a MAJOR item trying to find smaller EFI pumps with very little info or numbers. A older KAW 1100 has been mentioned so will look into this as well as some other possibilities.

Tony

[GyroRon]

All of this is exactly why I chose a carbed engine for my gyro.

[Friendly]

Originally Posted by GyroRon

All of this is exactly why I chose a carbed engine for my gyro.

All of "What" Ron? there are stand alone Engine Management Systems out there that can be purchased and installed on the Weber as well as other engines.
Tony chose the Microsquirt, I chose the Megasquirt.

I hope readers are not getting confused, because they are two different ECU's.
Or is it the fuel pump. Or the fact that I am modifying the adapter plate to include a flywheel?

[Friendly]

Originally Posted by WHY

. Paid $120 for it with the mounting kit plus freight, it's for sale $75 plus freight.
Tony

Tony,
Let me know what the cost with shipping is. I have no objections to using that pump.

[WHY]

OK Mark, it's yours. Think Randy out at WATCON found me exactly what I am looking for. Send me a PM with address and will ship, no freight charge,(you put me onto that aluminum).

Tony

[WHY]

Mark

Randy found a pump that has a rating of 14 gal. per hour at 50 psi. I figure I will burn less than 7 gph and the normally aspirated engine uses 43 psi on the injectors, pump pulls 5 amp. This should leave room for acceleration and have about 5 to 7 gal per hr return flow at cruise. Sure could have saved me a lot of sweat if I could have figured this out before I rewired the harness. The number is GSL-414 but I don't find it on Walbro website ?? He says it looks just like the 393/392.

Tony

[JEFF TIPTON]

GSL414 information

http://www.autoperformanceengineerin.../ext_pump.html

[WHY]

Hi Jeff

Thanks a bunch for the spec sheet, it does look identical to a 393/392. From all the inquires and request on the "Microsquirt forum info", this will be a vary popular item. Up until now I have seen no unit that met the specs desired. I'm sure this information will show up on the Microsquirt forum, many of our other post have.

Tony

PS this probably will not be enough for a turbo unit during boost.