Solenoid controls on mechanical devices
- Thread starter callard
- Start date
JeffYoung
New member
Pretty much a "no" on that one unless you can find a rule that allows it and I'm pretty sure there isn't one.
Sorry on that. See other thread on REM treatments for IIDSYCYC. Probably the most critical concept to understand about the IT ruleset.
Sorry on that. See other thread on REM treatments for IIDSYCYC. Probably the most critical concept to understand about the IT ruleset.
lateapex911
Super Moderator
Well, now, not so fast.
That is a fuel pump. Fuel pumps are free. Some common fuel pumps have the ability to govern themselves and so on. I can control my fuel pump with a switch, or even a rheostat.....
(I credit that definition to a couple CRB guys, who, when we were classing a Porsche 911, on an ITAC con call, told me that it could make oodles of power, when I was telling them that it was pretty much maxed from the factory (headers, port sizes, air cooling mechanical fuel injection with s largely unadjustable space cam). They insisted it is a fuel pump and you can 'do anything you want with it'.)'
So, ......
That is a fuel pump. Fuel pumps are free. Some common fuel pumps have the ability to govern themselves and so on. I can control my fuel pump with a switch, or even a rheostat.....
(I credit that definition to a couple CRB guys, who, when we were classing a Porsche 911, on an ITAC con call, told me that it could make oodles of power, when I was telling them that it was pretty much maxed from the factory (headers, port sizes, air cooling mechanical fuel injection with s largely unadjustable space cam). They insisted it is a fuel pump and you can 'do anything you want with it'.)'
So, ......
lateapex911
Super Moderator
Not sure if you're familiar with the MFi system in a 911, Jeff. it's like a little inline 6 cylinder engine. There's a low pressure pump that feeds a main galley, then the pistons pump up and down, pressurizing the fuel down 6 lines to the ports.
Where the EFi systems use a crank trigger and electronics to trigger the solenoid injectors, this uses a belt off the cam to drive it, and adjusts with internal widgets for rpm, load, temperature, baro pressure, etc.
But, fundamentally, it's a pump. And it pumps fuel to the cylinders in a 911.
Yes, the members of the CRB (at the time) who said it were quite impassioned. I certainly see the logic.
The injectors are the injectors in either car, and can not be changed.
But the pump itself is free by todays ITCS, and it's common for people to add supplementary switches, and i'd opine, legal as well.
Where the EFi systems use a crank trigger and electronics to trigger the solenoid injectors, this uses a belt off the cam to drive it, and adjusts with internal widgets for rpm, load, temperature, baro pressure, etc.
But, fundamentally, it's a pump. And it pumps fuel to the cylinders in a 911.
Yes, the members of the CRB (at the time) who said it were quite impassioned. I certainly see the logic.
The injectors are the injectors in either car, and can not be changed.
But the pump itself is free by todays ITCS, and it's common for people to add supplementary switches, and i'd opine, legal as well.
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As Jake points out, the rack under the MFI pistons has multiple control inputs and we'd like to smooth out the fule flow at the lower RPMs. On EFI this is easily doable with a MegaSquirt system. We're working on a MechaniSquirt (TM 
) way to achieve the same results from the pump.
) way to achieve the same results from the pump.Can't speak to the CRB thing, but yup, MFI is the same general technology as a diesel injection pump: in the end, it's the fuel pump.
Negative. A fuel injector is typically a solenoid valve; it does not pump fuel, it meters and atomizes it. In the case of MFI, it's just a pop-off valve.
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Fear not, the area we are working on helps us get the car in and out of the trailer and around the paddock. I just wanted to get some clarification so that the other mid-pack IT-S drivers won't panic and run to the stewards when they see wires going to my mechanical fuel injection. 
Fear not, the area we are working on helps us get the car in and out of the trailer and around the paddock. I just wanted to get some clarification so that the other mid-pack IT-S drivers won't panic and run to the stewards when they see wires going to my mechanical fuel injection.
i'd run the wires anyways just to give them something to worry about.....