Steve Lovelock
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| posted on 30/3/08 at 06:26 PM |
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MSnSE for Vx XE - settings required for SVA
Hello,
I have recently got my Vauxhall Redtop engine going following months / years of effort building and installing my MSnSE. Now I am desperate to get
the car ready for SVA and on the road for the summer so I need some help. You see that when I read the tuning manual it goes in one ear and straight
out the other. It could take me another six months to get it sorted so I am being cheeky. I have posted a set of photos in my archive of the
settings on my MSnSE. I would greatly appreciate it if some of you who understand these things could have a wee look and advise me of the areas I
need to address first and foremost. Naturally I fully expect a load of you to tell me to go and whistle but if you have the time I would be delighted
for your views.
I am running the standard cream Vauxhall injectors which I believe are rated at 216cc/min but don't understand the fuel calculation as the car
was originally quoted as having 150BHP and I can't get that with the fuel equation. A issue which is typical of my predicament.
A you tube vid of the car in action, you'll see that it starts and runs but doesn't have the power to get up a small incline.
http://www.youtube.com/watch?v=gESmpjoI9wY
Cheers
Steve
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Schrodinger
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| posted on 30/3/08 at 08:17 PM |
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Steve
I'm not very well up on MSnSE,however, just a couple of comments on looking through your screen shots.
On the constants page you have 2 injections per engine cycle while you have simultaneous injector staging. By my reconning that means you should have
at least 4 injections per cycle (720 degrees).
On the VE table I'm supprised that you have 100% VE at max revs and max kPA looking at the examples on the Megasquirt website that just
doesn't look right.
I don't suppose this helps much
Keith
Aviemore
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darrens
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| posted on 30/3/08 at 09:01 PM |
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Dito the comments on the VE table, have you checked what your AFR is when you are trying to climb the slope/hill.
Experiment with the contants pages to see which achieves the smoothest tickover. Requires a bit of patience.
[Edited on 30/3/08 by darrens]
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Steve Lovelock
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| posted on 10/4/08 at 07:07 AM |
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Thanks for the feedback. The tuning manual suggests that there is some benefit in choosing 2 squirts / alternating firing for port injection. As
this is my set up I was thinking of going for this. Any views?
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martyn_16v
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| posted on 10/4/08 at 08:17 AM |
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It's always worked for me. I used to get a hunting idle speed if i tried anything else.
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MikeRJ
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| posted on 10/4/08 at 08:33 AM |
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quote:
Originally posted by Steve Lovelock
Thanks for the feedback. The tuning manual suggests that there is some benefit in choosing 2 squirts / alternating firing for port injection. As
this is my set up I was thinking of going for this. Any views?
Do you have a wideband lambda to set this up with? If not then then it will be pure guesswork wether the emissions at idle will be low enough for
SVA.
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Steve Lovelock
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| posted on 10/4/08 at 09:09 AM |
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I do have a LC1 wideband. At the moment it runs but definitely not well enough to even cointemplate SVA.
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Jenko
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| posted on 11/4/08 at 08:26 AM |
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So, starting from the beginning....
First of...yes, 2 injections / cycle, but on alternating not simul........Doubale check wiring to ensure you have 2 banks of injectors run from
Megasquirt.
How is your cold start, and tick over?. Have you balanced your TB's?.
As the car is warming up it's using the WUE settings - Have you played with these?...
What is your AFR doing?.
Have you checked ignition timing is doing what it should?.....approx 10 degs at idle, and should advance as you rev the engine.
I think the trick with MS (Although I'm also having problems at the moment) is to take one step at a time - Basic checks first (Am I getting
ignition, and fuel), then set the priming pulse, then cranking pulse then WUE.......Only when you have a good tickover at warm temps should you be
considering driving the car, then you do the lower load sites on the VE table.....
Tis a long and drawn out process......
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Steve Lovelock
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| posted on 13/4/08 at 05:55 AM |
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Well I have had massive progress on this. First of all I discovered that the sensor wires from the VR sensor were the wrong way round. Then I
altered the fuel settings to 2 inj / alternating and then I had a go at creating a new VE table with sensible guess work on the BHP/torque settings.
End result? Well, I got up the hill and wheel spun down the path. Warm up is very smokey and there is a lot of improvement to happen but I can at
least apply for SVA happy that I can get there! Thanks for your help.
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