So I have been very curious to see what is going on in the ECU when the Launch Control is being used. Below is an excerpt from the log. I really think this isnt going to be TOO hard to hack, and so far I have managed to make some improvements with some help from others, but not to the level that I want yet.

Accel.........RPM............Airflow Hz.........ISC..........Knock.........Adv

86.2..........5500..............1264.............. 77..............7..............1

83.5..........5656..............1283.............. 77..............5..............12

85.0..........5718 .............1251..............77..............4.. ............12

87.8..........5875..............880.6............. 77..............5..............10

100...........6031..............918.3............. 77..............8 ............-10

96.8..........5968..............1025.............. 77..............8.............-10

80.7..........5625..............1144.............. 77..............6.............-9

81.9..........5523..............1321.............. 77..............5..............4

84.3..........5625..............1295.............. 77..............3..............12


This is the cleanest sample in the log that I got this morning. When I get home I will upload the whole log if anyone wants to see it. Variables that need to be known are: LC set at 5750 and some proprietary timing and fuel (I realise this needs to be known but not until we are further along). MIVEC the same map that I have been using, all the timing and fuel changes were done to the HO maps only. I am gonna test a change to the LO as well and see if it makes a difference as well as the MIVEC.

If and when the actual timing control table for the Stationary Limit gets discovered this will be all moot. Until then I managed to build 12psi at 5750. Anyone else been experimenting with this other than those I already know of?

 

Awesome. I'm defintiely interested in this topic.

So the only noticable modifications to the ECU so far are a change to the stationary rev limit, and changes to the High Octane fuel map & High Octane Timing map? I'm guessing something like an increase in fuel and much less timing??

My question is that in which load zones were the changes made?

 

100-140 at the stationary rev limit and one above. So in this case its 5500 and 6000.

 

I have some anti-lag tables visible in my Rom.. let me look to see if they have any relevent values that I can modify..

 

I have some 3 step code that I helped make then edited further for the HC11 processor. You get a stopped rev limit. Then you get a NLTS that doesen't activate until the VSS reaches a certian value (so that you can partial throttle first gear on the launch). PM me if interested and I'll help you get in implimented into the evo ecu.

 

Well I did some more tweaking and have managed 14psi. Things went exactly opposite of what I thought they would need to be, but I am now satified that the stock ECU can support enough launch boost at 5625 rpm for all but the hardcore dragracer. If there is a possibility to alter the stationary limit's "stationaryness" into something more like a real 2 step all would be well. Seems like I need to get into decoding the ROM deep now.

 

please elaborate, i'd love to see 14 psi at 5600.

 

PM sent

 

Any insight to this is much appreciated I have 10psi at 6000 and would like to lower the rpm if I could get more boost.

 

kinda weird... im getting 12-15 psi with my 2step set at 6200

 

pm'd you

 

If you pull back some timing on the launch box you can get more boost. I can get it to spike to 20psi on a 50 trim at 6000 or 15psi at 5500.

P.S.

I'm going to try to see if John Bradley can get the code to work in his evo then I'll make a writeup once its all figured out.

 

x2

I've been able to go from making about .5bar off the rev limiter to .7-.8bar by reducing the timing by a few degrees.

 

I would love to see NLTS using the stock ECU. That is one of the features that I miss from DSMLink. You wouldn't believe how smooth NLTS shifting is and how much time it saves you in the quarter, not having to rebuild boost or lift.

But, we would need different code than is in the stock ECU and a way to use it, like DSMLink does.

Basically all you have to do is have a rev limit when the clutch input switch is active. So, say like this:

1. stationary rev limit -- clutch is in and speed 0, or less than some value (like the stock ECU already has) i.e 6000 RPM
2. NLTS limit -- clutch is in and speed is >0, or some value around 7 mph or so, so that the rev limit is active when the clutch is pushed in and you're moving...i.e 5500RPM
3. Normal rev limiter -- clutch is out, just the rev limiter of the engine i.e. 7500RPM

We already have access to 1 & 3. But, the stock ECU doesn't have (or at least I don't think it has) any kind of tables to do #2. You need some extra code and a way to execute it.

Are you saying that you have the extra code? Or are you saying that you know how to execute/implement this code? Or are you saying that there are tables that we can manipulate to get number 2?


Thanks,
Eric