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Old 06-15-2011, 02:42 PM   #1 (permalink)
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Default 93 ZX7 efi

So basically my key got stolen for my bike (a 1993 ZX7-L1), and I began the process of swapping out the locks and going with a keyless solution I have in mind. Rummaging though our junk parts I found a 2006 CBR600 F4I throttle body. For shits and giggles I pulled my carb off, and found that the F4i's throttle body perfectly matches the ZX7's throttle body. I took off my electronics on the handle bars, and installed the F4i's controls. I've now got beautifully working throttle control, as well as the F4i's TB electronics fitting perfectly within the frame. I'm now in the process of installing an entire F4i's wire harness. So far the conversion has been plug n play. Only issues I see are sensor signals, and the airbox/fuel tank.

I think that once I get all the sensor signals properly converted (If I have to), It's just a simple matter of re-mapping the ECU for a 750, with the major differences between the two types of engines kept in mind. IE adapt rev-limit, power band etc. Any ideas?

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Old 06-16-2011, 12:36 AM   #2 (permalink)
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motherfuckin pictures ho.

power band won't be much of a fuel map thing. that will come out in tuning. it's not a 2 stroke. i'll be doing the same thing on my efi conversion using the megasquirt shit. you'll wanna change rev limit or build the motor to handle the F4i revs. shouldn't be much bullshit to convert the system over. biggest thing is cam sensor placement and trigger coil syncing.
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Old 06-16-2011, 11:55 AM   #3 (permalink)
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Originally Posted by whitehendrix View Post
motherfuckin pictures ho.

power band won't be much of a fuel map thing. that will come out in tuning. it's not a 2 stroke. i'll be doing the same thing on my efi conversion using the megasquirt shit. you'll wanna change rev limit or build the motor to handle the F4i revs. shouldn't be much bullshit to convert the system over. biggest thing is cam sensor placement and trigger coil syncing.
I know it's a shitty picture and doesn't actually show the TB's or anything



I'll grab some more photos next time I'm at the shop. Yeah my problem is the two sensors.

Can I just get a reluctor ring machined that matches a F4i's? And how the hell do the cam sensors work on a F4i?

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Old 06-18-2011, 11:15 PM   #4 (permalink)
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you can probably pull a signal off a well places sensor near the cam sprocket. use a small bolt as the reluctor or have a ring machined that'll clamp to the camshaft and you can pop a hole in the valvecover for it then. or weld a tab to the cam.. tho thats not adjustable then.
as far as the sensor.. it should be as accurate as any other cam sensor. it's a zero-crossing reference signal so all it's doing is syncing the fuel injectors to the coil channels at TDC. the 636 runs a "24-1" rotor for timing. the missing tooth denoted TDC to the ECU. the cam signal has to fall in at the missing tooth while running to sync. so.. as long as the F4i has a missing tooth on the wheel thats all you need to use to get a rough tune and adjustment for the cam sensor. run the crank to 0 TDC and you can zero in the trigger coil. at that point you'll wanna pick a spot and a cam to run off of. usually the exhaust cam. do whatever you're gonna do to get the cam sensor in position and have the centerline of the coil peak fall between the first and last teeth on the crank reluctor. you may need to use an oscilloscope depending on if you have any adjustability unless you're just a fucking badass with fabrication and tuning.

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Old 06-19-2011, 12:26 AM   #5 (permalink)
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I like this guy, someone is finally doing something with a non 96+ model.
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Old 06-19-2011, 02:52 AM   #6 (permalink)
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hOLY shit you're brave. hope your throwing a Power Commander and a wideband sensor on that sucker so you can tune it if you do get it running. Step 1 - make it run first. Good luck man. I would find what injectors will be optimal for 750cc then check em against your F4i injectors. If there's not a big difference you could just crank up the pulse width with a PC on the F4i's. Wiki also has some good info.

Fuel Injector Pulsewidth Calculator

White Hendrix also seems to know what's up. Must be a turbo man!
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Old 06-19-2011, 02:50 PM   #7 (permalink)
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Quote:
Originally Posted by Smitherz View Post
hOLY shit you're brave. hope your throwing a Power Commander and a wideband sensor on that sucker so you can tune it if you do get it running. Step 1 - make it run first. Good luck man. I would find what injectors will be optimal for 750cc then check em against your F4i injectors. If there's not a big difference you could just crank up the pulse width with a PC on the F4i's. Wiki also has some good info.

Fuel Injector Pulsewidth Calculator

White Hendrix also seems to know what's up. Must be a turbo man
!








should be able to maintain pulse width by adding gixxer 750 injectors. should pop right in. pretty sure they're all denso injectors.
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Last edited by whitehendrix; 06-19-2011 at 02:55 PM.
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Old 06-19-2011, 03:55 PM   #8 (permalink)
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Whitey, so how bad was the video!!
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Old 06-19-2011, 05:55 PM   #9 (permalink)
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i'm still looking for it
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Old 06-21-2011, 02:12 PM   #10 (permalink)
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Originally Posted by whitehendrix View Post
you can probably pull a signal off a well places sensor near the cam sprocket. use a small bolt as the reluctor or have a ring machined that'll clamp to the camshaft and you can pop a hole in the valvecover for it then. or weld a tab to the cam.. tho thats not adjustable then.
as far as the sensor.. it should be as accurate as any other cam sensor. it's a zero-crossing reference signal so all it's doing is syncing the fuel injectors to the coil channels at TDC. the 636 runs a "24-1" rotor for timing. the missing tooth denoted TDC to the ECU. the cam signal has to fall in at the missing tooth while running to sync. so.. as long as the F4i has a missing tooth on the wheel thats all you need to use to get a rough tune and adjustment for the cam sensor. run the crank to 0 TDC and you can zero in the trigger coil. at that point you'll wanna pick a spot and a cam to run off of. usually the exhaust cam. do whatever you're gonna do to get the cam sensor in position and have the centerline of the coil peak fall between the first and last teeth on the crank reluctor. you may need to use an oscilloscope depending on if you have any adjustability unless you're just a fucking badass with fabrication and tuning.

Great, this is the kind of info I needed. If anything, I can also make circuit boards that can convert signal levels and simulate pulses. And also, yeah I come from an automotive tuning background. Some of the electrical work on my volvo. I made it all from scratch, code, hardware all my own work. Live data logging and live tune editing on the ECU, with four LCD's all inter connected with all data capable of being displayed on any of the displays.




Quote:
Originally Posted by SuperCheese88 View Post
I like this guy, someone is finally doing something with a non 96+ model.
Ha thanks. I don't even have my permit, nor do I have any riding experience, but I like to make things go faster none the less.

Quote:
Originally Posted by Smitherz View Post
hOLY shit you're brave. hope your throwing a Power Commander and a wideband sensor on that sucker so you can tune it if you do get it running. Step 1 - make it run first. Good luck man. I would find what injectors will be optimal for 750cc then check em against your F4i injectors. If there's not a big difference you could just crank up the pulse width with a PC on the F4i's. Wiki also has some good info.

Fuel Injector Pulsewidth Calculator

White Hendrix also seems to know what's up. Must be a turbo man!
It will run I hope
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