924Board.org

etiennekuh · Joined: 31 Jul 2008 Posts: 34 Location: netherlands

I am trying to tune my 924 N/A with MS.

Now I have some problems, I have a AFR table but I dont think is very good

If some one will check my msq file and give some notes, (I have just started to tune) then sent me a PM with email, and I will sent it.

Thanks

_________________
tuning is like a good hobby, it never gets bored

macBdog · Posted: Thu Dec 03, 2009 12:20 pm Post subject:

Get a wideband. Seriously I tuned my car with MS1 and it was like a guessing game without the wideband.
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1979 931 with a 350 chev
1973 911E with EFI

Min · Posted: Thu Dec 03, 2009 3:04 pm Post subject:

If you do a bit of searching, I've posted all of my tables for my 924 N/A.

Min
_________________
Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.

etiennekuh · Joined: 31 Jul 2008 Posts: 34 Location: netherlands

I have a wideband already

ok I will do a search thanks

Etienne
_________________
tuning is like a good hobby, it never gets bored

pocketscience · Posted: Thu Dec 03, 2009 7:00 pm Post subject:

Min · Posted: Fri Dec 04, 2009 1:07 pm Post subject:

Ah yes, that's a good post, maybe some kindly moderator can sticky it?

Min
_________________
Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

I've got some tables too, which work just fine at the moment.
The only problem is that I've probably got another setup; raised CR, itb's etc. and therefore running alpha-N instead of the speed density algorithm.

Still, if you'd like some help, let me know. My msn adress is the hotmail adress I specified in my profile.
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

etiennekuh · Joined: 31 Jul 2008 Posts: 34 Location: netherlands

I have a question

what kind of MAP value are you all running when idling?

I have 59 Kpa...

On the MS site they say 25 is around normal.

My engine idles around 850 rpm
_________________
tuning is like a good hobby, it never gets bored

pocketscience · Posted: Sun Dec 13, 2009 10:57 am Post subject:

I'm around high 40s, low 50s. Bigger TB might be causing that. Never been down below 40 at idle for me.
_________________
Whoever said you can't buy happiness forgot about Porsche!
81 924 N/A, GTS lights, Saratoga, interior, headers, Integral cam, EFI (sold)
95 993
69 911

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

60 at the moment, measured in a damping box.
I've had it near 50kpa before. Once 45, but that was at the injectors (in head) and not the tb.
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

Min · Posted: Sun Dec 13, 2009 1:12 pm Post subject:

33 to 35 kpa at idle.

Min
_________________
Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.

etiennekuh · Joined: 31 Jul 2008 Posts: 34 Location: netherlands

How do I get this down?

Becaus I am trying to set all the injector karateristics

At the moment I am having PWM current limit off 30% and 10ms of opening time, I am trying to change it to 30% and 1.7 ms. And I am changing my REQF form 18 to 13.4.
_________________
tuning is like a good hobby, it never gets bored

etiennekuh · Joined: 31 Jul 2008 Posts: 34 Location: netherlands

I have some new problems, I don't get the injector karateristics good

This is what I have

Injector opening time 7.0ms

PWM current limit 40%

Time threshold 4.0ms

PWM periode 66us

Req fuel 19

I have bosch 0280150158 944 injetors (2.9 ohm) 23 lbs

It ilde's at 55 Kpa with a VE of 69. If I gently push the throttle and get it up to 70-75 Kpa Ve is then 77 it leans out.

If i set the timethreshold under 3.7ms it run very bad, so what I thougt, the time threshold must be a bit higher. But the Megamanual says that if your injectors are less then 3ohm your current limit should be around 30% or less and the time threshold 1 ms. And they say it should be more then 1.5-1.7 or your injectors will fry...

so what am I doing wrong??
_________________
tuning is like a good hobby, it never gets bored

etiennekuh · Joined: 31 Jul 2008 Posts: 34 Location: netherlands

I think I have found a sulution... I have a set of 18lbs high impedance volvo injectors.

That will solve the problem of time threshold and pwm threshold.

What should I use for injector opening time, when I use the high impedance?

Etienne
_________________
tuning is like a good hobby, it never gets bored

Min · Posted: Mon Dec 14, 2009 5:00 am Post subject:

Start with 1 millisecond, and get the car running with that, you can't tune it properly until the car is drivable.

Min
_________________
Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.