A Practical guide to megasquirting your 944
06-01-2017, 05:49 PM
#151
Intermediate
I'll get an MS2 from a friend. As I know it has a flyback circuit.
I'd like to make a direct replacement ECU for my 944 Turbo.
So 2 injetors will be used paralel.
I'd like to make a direct replacement ECU for my 944 Turbo.
So 2 injetors will be used paralel.
06-01-2017, 06:10 PM
#152
Intermediate
It would be a great help if someone could share me an msq with standard fueling.
As I've read trough this topic the msqs available here are not on standard injectors / fpr.
As I've read trough this topic the msqs available here are not on standard injectors / fpr.
06-01-2017, 06:24 PM
#153
Rennlist Member
Your VE table (fuel table) will be the same. Your req_fuel constant, under engine settings, will change based on your injector size and fuel pressure and so on. Things such as cam profile and head porting will affect the VE table.
06-03-2017, 12:57 PM
#154
Intermediate
Yes, you're right. Thanks
What abot the KLR module?
Do you use it in the MS setup?
Without that I think there will be no factory boost gauge. No knock detection. But the TPS is connected to the KLR which would be necessary for the MS.
And without that shall the ignition be bridged? (KLR 9 - 16)
I'm trying to collect all information on how to megasquirt a stock car.
What abot the KLR module?
Do you use it in the MS setup?
Without that I think there will be no factory boost gauge. No knock detection. But the TPS is connected to the KLR which would be necessary for the MS.
And without that shall the ignition be bridged? (KLR 9 - 16)
I'm trying to collect all information on how to megasquirt a stock car.
06-20-2017, 06:23 AM
#155
Intermediate
A short progress. Maybe someone is interested.
I've turned to the 36-1 way. But not physically just a SW / PIC solution.
I've taken a small PIC12F675 and written an assembly code.
Input is the 2 VR signals and output is a 36-1.
Yesterday I've tried it on the desk with a crankshaft wheel pulser audio generator and it seems to be OK.
I'll do some more intensive testing and in some weeks I'll try it in the car.
This is a first solution. I keep thinking of choosing another PIC with more calculation capacity. Whith the current one 7000rpm seems to be the top end.
I've turned to the 36-1 way. But not physically just a SW / PIC solution.
I've taken a small PIC12F675 and written an assembly code.
Input is the 2 VR signals and output is a 36-1.
Yesterday I've tried it on the desk with a crankshaft wheel pulser audio generator and it seems to be OK.
I'll do some more intensive testing and in some weeks I'll try it in the car.
This is a first solution. I keep thinking of choosing another PIC with more calculation capacity. Whith the current one 7000rpm seems to be the top end.
06-20-2017, 11:05 AM
#156
Rennlist Member
Why not use a hardware divider? On a 951 there are 130 teeth. You could divide by 5 (26 "teeth") and then use the existing reference sensor (single tooth pickup). I'm not sure how the DME processing chip for that signal is handled but I imagine it does the same thing. Some people have been able to use 130+1 signals directly with MS3.
06-20-2017, 02:12 PM
#158
Rennlist Member
I think you're right, I was thinking NA by accident. For the 132 teeth you could divide by 3 and get 44 teeth. TunerStudio has configuration options that would let you use 44+1 as the crank signal.
06-20-2017, 03:15 PM
#159
Intermediate
Yes. Tuner studio has.
But the MS Extra code has a limitation that 3600 / number of teeth shall be an integer. But with 44 teeth it is not and it throws an error.
So either I should use the MS Efi code. It could even run with 66-1 or 132-1
Or if I choose the MS Extra I can only use a 12-1 (simple division by 11) or I thought that this multiplication (using 2 calculated teeth between the real ones) would be somewhat better. But I'm also runing discussions on the MS Extra forum and the feedback is that the real 12-1 would be better.
Anyway the simple division and the combination of the 2VRs to 1 seems to be easy.
But the MS Extra code has a limitation that 3600 / number of teeth shall be an integer. But with 44 teeth it is not and it throws an error.
So either I should use the MS Efi code. It could even run with 66-1 or 132-1
Or if I choose the MS Extra I can only use a 12-1 (simple division by 11) or I thought that this multiplication (using 2 calculated teeth between the real ones) would be somewhat better. But I'm also runing discussions on the MS Extra forum and the feedback is that the real 12-1 would be better.
Anyway the simple division and the combination of the 2VRs to 1 seems to be easy.
06-23-2017, 06:18 AM
#160
2nd Gear
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I'll have to get permission from Peep to post up my tables 
Thank you for sharing - I think you may be leaving some power on the table still in ignition timing - I've got 30 degrees at WOT and run 87 octane. I think my best power on the old Rogue setup was 32 degrees peak on 91...I am thinking of adding a little timing and going back to 91 and seeing what happens with my next fill-up.
Thank you for sharing - I think you may be leaving some power on the table still in ignition timing - I've got 30 degrees at WOT and run 87 octane. I think my best power on the old Rogue setup was 32 degrees peak on 91...I am thinking of adding a little timing and going back to 91 and seeing what happens with my next fill-up.
11-16-2017, 02:26 PM
#161
Trying to figure out TDC from front of Motor
Been playing around with megasquirt for a while and just figured out I might not have the right tooth set as TDC offset... Any ideas on who you keyed your engines for a fwd mounted trigger wheel since the 944 has no timing marks on the front of the engine or am I missing something??
11-16-2017, 04:25 PM
#162
Instructor
Has anybody run a s2 fly wheel with the stock crank sensor? I have an S2 motor I'm just getting ready to drop into my track only 924S with a micro squirt over the winter.
11-16-2017, 05:03 PM
#163
Drifting
I will be doing that this winter as well. I can post my progress as I go, but step one will be seeing what's salvageable after the fire.
11-16-2017, 06:00 PM
#164
Rennlist Member
No reason why it wouldn't work, it's a very standard 60-2 setup. Another option to consider is that MS3 natively support the factory 130 & 132 tooth flywheels we have. A 2nd pickup circuit can be built, or the MS3X option has a 2nd one already built in. I'm going to be doing tri-trigger for my 951... factory 951 sensors, plus a Clewitt cam sensor ($180 or something last I checked for everything). That will allow full sequential without basically no effort/fabrication.
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11-16-2017, 06:10 PM
#165
Instructor
No reason why it wouldn't work, it's a very standard 60-2 setup. Another option to consider is that MS3 natively support the factory 130 & 132 tooth flywheels we have. A 2nd pickup circuit can be built, or the MS3X option has a 2nd one already built in. I'm going to be doing tri-trigger for my 951... factory 951 sensors, plus a Clewitt cam sensor ($180 or something last I checked for everything). That will allow full sequential without basically no effort/fabrication.
Last edited by pyropete125; 11-16-2017 at 08:52 PM.