VEMS engine management

[Jamo]

Jeffer are you going to use Audi trigger? or your own method?

[zlobo]

i herd that they have fixed the problem with the audi trigger so now you can rev 9000rpm witout problems

[Jamo]

i herd that they have fixed the problem with the audi trigger so now you can rev 9000rpm witout problems

Yes but most I5 users don't use it they use an alternative method.

[pnanassy]

Hearing is one thing,having problems in real life is another.
Just an advice: if you havent seen a thing working with your own eyes VEMS related,dont trust...
I was told about 9 months ago that Auditrigger is fully working.LOL

[Billman]

So does it work now or not? What do you suggest?

[pnanassy]

I have seen 1 car running (Marcells car) with VERY LIMITED power output on auditrigger,so thats not a "working" high output install in my book.THe other cars here i heard of were having problems.If you buy such a thing,at least you want to rev your engine 1000-2000rpm more than factory.I also heard different opinions on the 135 teeth robbing ECU time,i dont know how it works but looks like they have also problems figuring that out.A P&P system is maybe easy to install,but im not a fan of them so i always use new wiring looms.

I think if someone is limited at the installation of a new loom,he should stuck with the OEM system...

[kalsket]

Hi All,

I'm running VEMS PnP ecu in my RS2 every day, 450Hp (and 7500rpm) without any problem. And works much nicer than Motronic never did. It is true that auditrigger took a plenty of time to get it working, but has been that for about 3 months now.
So far I have installed 5 of those in Finland in 5cyl audis, people have been pleased with it.

We have also new boost control version in beta-testing and it seems to work just fine, so no need for avc-r unless you want different boost depending on gear.

[pnanassy]

I would like to se a 9000RPM car with 135 teeth running low 10's...
That would be an evidence for me!

BTW congratulations to get it even running flawlessy at those power levels,it was defenietly your hard work!

BTW ,Kalske dont you have any freerevving issues (with no load?) ?What accel enrichment settings do you use (on what size injectors) ?

Thanks,Peter

[Jeffer]

I'll be running my own trigger design.

A friend of mine has VEMS running on his 5-cilinder. On stock sensors. No problems.....

[kalsket]

BTW congratulations to get it even running flawlessy at those power levels,it was defenietly your hard work!

BTW ,Kalske dont you have any freerevving issues (with no load?) ?What accel enrichment settings do you use (on what size injectors) ?

Thanks Peter, it has taken quite a while to make it perfect
Making cold start perfect is a real pain in the ****, as you get only one or two tries per day

No issues with freerevving with 630cc Siemens injectors.
Acc_enrichment:
4 - 0,1
12 - 0,2
20 - 0,3
35 - 0,4
duration 1,5s

[Jamo]

Thanks Peter, it has taken quite a while to make it perfect
Making cold start perfect is a real pain in the ****, as you get only one or two tries per day

No issues with freerevving with 630cc Siemens injectors.
Acc_enrichment:
4 - 0,1
12 - 0,2
20 - 0,3
35 - 0,4
duration 1,5s

That what worries me, you say it's taken time and a pain in the **** to get cold starts perfect?

Still looking at VEMS i'm leaning towards a remap at the moment, time is money money is time just need to balance which one is going to be more important in this case.

[kalsket]

That what worries me, you say it's taken time and a pain in the **** to get cold starts perfect?

You can make it good in just couple of starts, but if you want perfection (enough fuel but not a cc that isn't needed) will take time.

When ever you want 400++ (limit for std maf), remap is no longer a good option. Up to 400 it is. If you buy your vems from www.vems.co.uk the base setup you get will most likely be based on months of my blood, sweat and tears.

[repo]

Did they make the protection against ghost signals into the code yet?

[kalsket]

We are still working on it

[rob@vems.co.uk]

I thought I'd stick my nose in here because people keep sending me the link to this forum

A lot of work has gone into the noise filtering circutry and trigger detection code on this system (is amazing how focused people can get when they've got their own cars), as always theres a few minor issues to solve.

pnanassy - if you're having problems with the newest firmware, please let us know and we'll get your datalogs and setup and see what's causing the problem, is it possible that some of the filtering thats done in the factory ECUs might not have been implemented in your setup? I've not seen any issues reported on your wiki page so I cant be sure.

Cold starts are never easy regardless of which ECU you choose to go for, but with our wideband lambda feedback you only have to concern yourself with getting the thing close as once the wideband is warmed up it can be used to trim the warm-up enrichment. The main problem with warm-up is that you get one chance a day to get it right.

As for me never having had anything to do with I5's thats true, I've spent my time developing installations for Japanese cars (Nissan 200SX and Skyline, Toyota Corollas etc) the prinicples are the same across all engine types and once you're running on a 'known good' trigger type the problems you'll see are more about general tuning than hardware specifics.

If people have any questions about the level of support that I offer, you only need roll over to the support forum: http://www.vems.co.uk/forum or check the resellers on my links page. The main support for the VEMS webshop is through the wiki, which almost nobody gets on with so I started the forum, its run by me and 90% of the support is through me, I get extremely good back-up from the other development team guys for the stuff that I dont know the answer to.

For the last few months I've been looking for an AAN car, but there aint too many of them about, not like the "Japanese Fords" I'm used to.