final check
Moderators: jsmcortina, muythaibxr
-
- Helpful MS/Extra'er
- Posts: 109
- Joined: Wed Jan 18, 2006 2:18 pm
- Location: UK. West Yorkshire
final check
Well the car is finished and just doing the final bits before mapping in January. This is where i am now. could you have a look and see what you think, just anything glaring really. The car starts and runs great, but haven't had it through the rev range (not road legal)
Its still really rich at idle i know that
I had a bit of a set back as my trailer was stolen a few moths ago. I've sorted another and collect at the weekend.
Paul
Its still really rich at idle i know that
I had a bit of a set back as my trailer was stolen a few moths ago. I've sorted another and collect at the weekend.
Paul
- Attachments
-
- 2017-11-14_13.37.38.msq
- (118.81 KiB) Downloaded 26 times
-
- 2017-11-14_13.58.13.msl
- (1.16 MiB) Downloaded 24 times
"i'll get there in the end"
-
- Experienced MS/Extra'er
- Posts: 374
- Joined: Thu May 26, 2016 1:25 pm
- Location: Germany
Re: final check
Your injectors seem to be really big as PW is only about 1.5ms in idle despite the really rich mixture. On deceleration it's down to 1.2ms. If you don't already use sequential this may be beneficial.
My project: Link
-
- Super MS/Extra'er
- Posts: 17507
- Joined: Thu Apr 16, 2009 8:08 pm
Re: final check
I see you've got PWM current limiting on with a 75% current limit - what sort of injectors are these?
There's an odd "ledge" in the VE table between 20 and 25% TPS at low RPM - what's the deal there? Timing map is also a bit weird; at high RPM, it's pulling timing as the load drops, while low load timing would normally advance.
This engine pulls great vacuum at idle - any particular reason you're using alpha-N?
There's an odd "ledge" in the VE table between 20 and 25% TPS at low RPM - what's the deal there? Timing map is also a bit weird; at high RPM, it's pulling timing as the load drops, while low load timing would normally advance.
This engine pulls great vacuum at idle - any particular reason you're using alpha-N?
Matt Cramer -1966 Dodge Dart slant six running on MS3X
-
- Helpful MS/Extra'er
- Posts: 109
- Joined: Wed Jan 18, 2006 2:18 pm
- Location: UK. West Yorkshire
Re: final check
It's a 1.8 Mazda mx5 standard. I'm using Mazda RX8 injectors It's eventually going to be forced induction. It's gone from 265cc standard to 450cc.
I'm using Alpha N as I'm using tps for load. This is because don't know enough about the different choices
I'm already running semi sequential.
I'll have a look tomorrow at the things you have
Thank you
I'm using Alpha N as I'm using tps for load. This is because don't know enough about the different choices
I'm already running semi sequential.
I'll have a look tomorrow at the things you have
Thank you
"i'll get there in the end"
-
- Helpful MS/Extra'er
- Posts: 109
- Joined: Wed Jan 18, 2006 2:18 pm
- Location: UK. West Yorkshire
Re: final check
These are the things that i'm talking about. I don't have a massive amount of experience with this. I can see what your saying about the PWM% Should i take this back to recommended 30%? I have no idea why it ended up with that figureMatt Cramer wrote:I see you've got PWM current limiting on with a 75% current limit - what sort of injectors are these?
There's an odd "ledge" in the VE table between 20 and 25% TPS at low RPM - what's the deal there? Timing map is also a bit weird; at high RPM, it's pulling timing as the load drops, while low load timing would normally advance.
This engine pulls great vacuum at idle - any particular reason you're using alpha-N?
I can see the ledge you are speaking of and will have a look.
So ive just been out quickly to the workshop and set it to "speed density" this brought the idle AFR to 13.5 - 14.0.
cheers
"i'll get there in the end"
Re: final check
i thought rx8 injectors were high-z so wouldn't need current limiting
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
-
- Helpful MS/Extra'er
- Posts: 109
- Joined: Wed Jan 18, 2006 2:18 pm
- Location: UK. West Yorkshire
Re: final check
Its the other way around isn't it? The Mini i did with the Suzuki swift GTI engine in it had low impedance injectors and this needed a Ballast resistor as the DTA ECU could only use high impedance injectors.grom_e30 wrote:i thought rx8 injectors were high-z so wouldn't need current limiting
Paul
"i'll get there in the end"
Re: final check
how many ohms are the injectors?
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
-
- Helpful MS/Extra'er
- Posts: 109
- Joined: Wed Jan 18, 2006 2:18 pm
- Location: UK. West Yorkshire
Re: final check
that's high-z so you don't need current limiting so best to turn it off
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
-
- Helpful MS/Extra'er
- Posts: 109
- Joined: Wed Jan 18, 2006 2:18 pm
- Location: UK. West Yorkshire
Re: final check
Ok got it. That's a setting to use between high and low impedance. I'll turn it off thengrom_e30 wrote:that's high-z so you don't need current limiting so best to turn it off
"i'll get there in the end"
-
- Helpful MS/Extra'er
- Posts: 109
- Joined: Wed Jan 18, 2006 2:18 pm
- Location: UK. West Yorkshire
Re: final check
Now running speed density
turned off current limiting
This tune is using the last restore point from a few weeks ago before i started messing with the fuel and spark.
idle speed is higher and a bit unsteady also there is a flat spot in the middle of the map now.
Went back to Alpha N for a short data log and revs freely. the idle is much more stable and lower.
Cheers
turned off current limiting
This tune is using the last restore point from a few weeks ago before i started messing with the fuel and spark.
idle speed is higher and a bit unsteady also there is a flat spot in the middle of the map now.
Went back to Alpha N for a short data log and revs freely. the idle is much more stable and lower.
Cheers
- Attachments
-
- 2017-11-15_10.39.46.msq
- (119.13 KiB) Downloaded 129 times
-
- 2017-11-15_10.48.58.msl
- speed density on
- (554.13 KiB) Downloaded 18 times
-
- 2017-11-15_10.54.32.msl
- Alpha N on
- (442.88 KiB) Downloaded 17 times
"i'll get there in the end"
Re: final check
it will run like a dog if you just switch from a semi tuned alpha-n setup to a totally un tuned speed density setup
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
-
- Helpful MS/Extra'er
- Posts: 109
- Joined: Wed Jan 18, 2006 2:18 pm
- Location: UK. West Yorkshire
Re: final check
Non of it is really tunedgrom_e30 wrote:it will run like a dog if you just switch from a semi tuned alpha-n setup to a totally un tuned speed density setup
"i'll get there in the end"
Re: final check
if you spend a bit of time with it in speed density and tune it a bit, it will usually be a bit better mannered at small throttle openings compared to alpha-n also the speed density will be better for tuning once the car is boosted.
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????