I'm considering converting my 07 Mastiff from carb to EFI. I had a Roadking before my Mastiff that was EFI and it always just seem to run smoother. I just feel like with this carb it seems to be real finiky depending on the wheather. If abybody knows reasons I should go to EFI please share them. I could really some help with a list all the parts that I would need to make the EFI conversion. That way I can looked them up and get a rough esimate of what this is going to cost me.. Thanks in advance for your help.
considering conv to EFI
- Thread starter Stimey131
- Start date
bruce
Active Member
will cost a lot , new computer, 02 sensor, iac motor, new exhaust for 02 sensor, and the list goes on, remember fuel injectors are controlled by computer, which gets it info. from sensors so it can control fuel/air mixture. carb. is way better, maybe you just need to get info from S&S which is free and learn more about your carb. so you can work with it better. hope this helps.
erldawg
Guru
I have an EFI bike runs good however; I think once you realize the cost involved you'd change your mind quickly. Way too many parts and new tank...easily close to $2k .....
Take it to a good tuner if you do not feel comfortable performing the adjustments..save yer money or buy a open primary....
Take it to a good tuner if you do not feel comfortable performing the adjustments..save yer money or buy a open primary....
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standuprick
Active Member
Carbs are fine when they are jetted properly. Mine runs great. Great throttle response. Save your money for something else
Parts needed to convert to EFI:
1. ECU - Magneti-Marelli if you can find one off a Harley.
2. Crankshaft with notches to show 360° is one part of the math calc.
3. Throttle body with manifold.
3, IAP sensor (VOES switch) - Air sucking of the intake.
4. Atmospheric pressure sensor - To know if you are at sea level or in the mountains.
5. Temp sensor - So it can run rich on start up, normal when temp is running stable.
6. Throttle position sensor - Shows rpm vs. TPS opening = Fuel trimming.
7. Speed sensor - off the transmission = Shows that ignition timing is about to load under shifting is trim the ign curve. Same as if you turn the a/c on the car, the pump drags on the engine, so the ECU trims the AFR/timing during that load process.
8. Take out a loan on the house so you can spend more on parts than trading in on another FI bike, buy almost breaking even on the trade.
1. ECU - Magneti-Marelli if you can find one off a Harley.
2. Crankshaft with notches to show 360° is one part of the math calc.
3. Throttle body with manifold.
3, IAP sensor (VOES switch) - Air sucking of the intake.
4. Atmospheric pressure sensor - To know if you are at sea level or in the mountains.
5. Temp sensor - So it can run rich on start up, normal when temp is running stable.
6. Throttle position sensor - Shows rpm vs. TPS opening = Fuel trimming.
7. Speed sensor - off the transmission = Shows that ignition timing is about to load under shifting is trim the ign curve. Same as if you turn the a/c on the car, the pump drags on the engine, so the ECU trims the AFR/timing during that load process.
8. Take out a loan on the house so you can spend more on parts than trading in on another FI bike, buy almost breaking even on the trade.
I really appreciate the feed back. I didn't realize that so much would have to be changed out, I knew it would need cpu and sensors, but didn't know about the new tank, crank, ect.... It sounds like crazy talk now to even consider it. I agree i will just have to find a good tunner in my area, but that seems to be easier said than done here in Tulsa, OK
This shit is too simple. FI is a closed loop system, it is so bulletproof as if it is a toaster, it is that closed in loop. You need no other components, meaning, to make toast. As if an engine is a closed loop system, you need no other theories:
Engine:
1. Fuel
2. Spark
3. Compression
FI:
1. Connectors not connected.
2. Wire out of connector.
3. Wire not grounded or internal short to ground.
This means, if I have no spark is the engine, it is like saying I have no ground is the electronics. If not connected, how simple is the loop? Every time you cry unit failed, somehow, it was a wire problem. Why then, did the new unit still act the same, i.e., no change. :roll:
This is where you lay down on a couch, discuss things with Dr. WATT is when you begin to pull your hair out... IS the deeper troubleshooting tree
But with 6 peenultimate basics that make absolute sense, there is no reason not to fear "The Loop(s)." It's a learning process like anything else you hammer out.
Moespeeds
Well-Known Member
I have experience with 2 EFI Big Dogs. One was lemon law'd after he had it in the shop for most of two years with EFI issues. The other was picked up by Big Dog twice, the second time they replaced his motor and made him sign a legal waiver that he would not talk about it on this group. The guy still has the bike, he can't get it sold, and it still runs like shit. If you have EFI issues, call Sven, he can fix it, since nobody else will touch it.
