Megasquirt Req fuel calculator gives 19.5ms (instead of 9.5ms)
Thread Starter
Joined: Jul 2002
Posts: 3,219
Likes: 8
From: Washington State
Req fuel calculator gives 19.5ms (instead of 9.5ms)
I have the car up and running - actually runs amazingly well, however I went back in to check the "Req fuel" value to help a buddy out and noticed that when i run my configuration through the built-in calculator (click "Required Fuel..." button), it returns a value of 19.5, versus the 9.5 that I have in there from Aaron's tutorial. Most other references I see on the forums are also around 8-10ms.
Control algorithm: Speed Density
Squirts Per Engine Cycle: 2
Injector Staging: Alternating
Engine Stroke/Rotary: Rotary
No. Cylanders/Rotors: 2
Number of Injectors: 2
Engine Type: Even Fire
Engine Size(cc): 2600
Injector Size Each(cc): 460
Main Fuel Outputs: MS3x fuel
Sequential On: Fully Sequential
Angle Specifies: End of squirt
Injector Trim: Off
A: 1
B: 3
I'm going to play around with the 19.5ms value today, see what sort of changes it makes to the tune, but definitely keeping the current tune saved in case it messes everything up.
Anyone else have any thoughts or experience on the subject?
Control algorithm: Speed Density
Squirts Per Engine Cycle: 2
Injector Staging: Alternating
Engine Stroke/Rotary: Rotary
No. Cylanders/Rotors: 2
Number of Injectors: 2
Engine Type: Even Fire
Engine Size(cc): 2600
Injector Size Each(cc): 460
Main Fuel Outputs: MS3x fuel
Sequential On: Fully Sequential
Angle Specifies: End of squirt
Injector Trim: Off
A: 1
B: 3
I'm going to play around with the 19.5ms value today, see what sort of changes it makes to the tune, but definitely keeping the current tune saved in case it messes everything up.
Anyone else have any thoughts or experience on the subject?
Thread Starter
Joined: Jul 2002
Posts: 3,219
Likes: 8
From: Washington State
Interesting. Aaron's tutorial specifically says 2600. Where did you guys get that info about the new firmware?
When i put 1308 through the calculation it definitely returns 9.5, so its correct for sure. Thanks! I'll send Aaron a note to update his tutorial.
~Geoff
When i put 1308 through the calculation it definitely returns 9.5, so its correct for sure. Thanks! I'll send Aaron a note to update his tutorial.
~Geoff
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
The firmware changed while I was writing the instructions.
But it's only an issue if you use the VE calculator. If you just type in the numbers I've provided then it works.
At some point I'll update the writeup but with 1.4 firmware looming, I will likely wait until it is released. Well, I could use prerelease firmware but that's rarely a good idea.
But it's only an issue if you use the VE calculator. If you just type in the numbers I've provided then it works.
At some point I'll update the writeup but with 1.4 firmware looming, I will likely wait until it is released. Well, I could use prerelease firmware but that's rarely a good idea.
Thread Starter
Joined: Jul 2002
Posts: 3,219
Likes: 8
From: Washington State
The firmware changed while I was writing the instructions. But it's only an issue if you use the VE calculator. If you just type in the numbers I've provided then it works. At some point I'll update the writeup but with 1.4 firmware looming, I will likely wait until it is released. Well, I could use prerelease firmware but that's rarely a good idea.
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