87 951 VEMS Install
#470
Rennlist Member
Well, I finally got my car running right. My issue after getting VEMS installed and running around doing the autotune for 60 ish miles was that I was fouling plugs and the car didn't seem to pull as hard as it used to with the Vitesse piggyback (my car also has a vitesse stage 3 turbo). Since I don't know how to tune and didn't want to blow something up. I took it to a dyno tuner.
Here's the first dyno pull using the basemap that shipped with it + 60 miles of autotune:
Not too impressive.
However, after a dozen or so pulls, adjusting the fuel and ignition curves, this is what I ended up with:
I am very happy with these numbers and the car pulls harder than it ever has. In fact, the car has never run this good - idle is now dialed in and rock solid and performance off boost is much better than it ever was before I put in VEMS.
So - I plan to just enjoy the car for the fall then this winter put in the wasted spark system. I'd also like to get A/C system working. Does anyone have settings/instructions for these two things?
Thanks.
Here's the first dyno pull using the basemap that shipped with it + 60 miles of autotune:
Not too impressive.
However, after a dozen or so pulls, adjusting the fuel and ignition curves, this is what I ended up with:
I am very happy with these numbers and the car pulls harder than it ever has. In fact, the car has never run this good - idle is now dialed in and rock solid and performance off boost is much better than it ever was before I put in VEMS.
So - I plan to just enjoy the car for the fall then this winter put in the wasted spark system. I'd also like to get A/C system working. Does anyone have settings/instructions for these two things?
Thanks.
#471
Rennlist Member
Unfortunate you are still having the same problem. I've read online a few people experiencing a hard reset of the vems ecu during cranking. Primarily a voltage drop issue and that vems is sensitive to voltage drops. Basically the solution was to put a capacitor in parallel with vems ecu to compensate for the voltage drop.
#472
Three Wheelin'
Unfortunate you are still having the same problem. I've read online a few people experiencing a hard reset of the vems ecu during cranking. Primarily a voltage drop issue and that vems is sensitive to voltage drops. Basically the solution was to put a capacitor in parallel with vems ecu to compensate for the voltage drop.
#473
Advanced
What are your others mods on your car? Do you min sharing your configuration file to compare?
Car is not very modified - Vitesse stage 3 turbo, manual boost control set to 15 psi, now VEMS...that is pretty much it.
#474
Rennlist Member
The following users liked this post:
Cyberpunky (09-07-2019)
#475
Rennlist Member
Much Appreciated. Just want to compare ignition timing and VE tables. Looking to improve off boost throttle response. Thanks again
#476
At 200kpa line you have raised the ignition by 0,5-1 degree only and at the lower 160 and 130 kpa lines you have lowered the ignition a little ?
Nothing changed at all below 100kpa line.
You skipped the 250kpa line i think
#477
Race Director
This is my current table, pretty similar to czentner from a quick glance. 2.5L / T04E .57, ~18psi.
Last edited by SamGrant951; 09-06-2019 at 07:42 PM.
#480
Race Director