maybe I will make the map dual function, ie

for launch:
if speed < 20km/h and tps > 60% then run this map

for shift/als:
if rpm > 5500 and clutch = down then run this map

 

Should downshifting be much of an issues since the driver has to increase revs anyway? Should that be enough to maintain boost, or would changing maps be somehow beneficial?

 

It shouldn't work at all while downshifting. It's possible to know if breake pedal is pressed or no?


We should test it. Maybe it can't work properly without light throttle. In this case we can use this

if (rpm > 5500) and (clutch = down) and (tps > 20%) then run this map

Can we limit the throttle? In this case we can do something like this

if (rpm > 5500) and (clutch = down) and (tps > 80%) then
{
if (clutch_down > 100 msec) limit throtle to 50%; //shift from 4 to 5 or mishifting
run this map;
}

and do WOT shifting.

maybe it will work properly with 100% throttle.

 

I think you would need to use the same discreet variable... with that logic above you could be trying to run both maps at launch....

 

You can simplify this logic down to:

if( rpm > 5500 && clutch == down )
RunThisMap();

Launching is at ~ 5500 RPM. So is your ALS logic. The Throttle position is not really needed for the Launch, because we will launch at high RPM. Therefore 1 mode.

 

But with ALS we can reduce launch rpm.

 

One must assume that the RPM will be adjustable.

 

I was thinking about how to do this the other day for heel & toe downshifting but my brain exploded. I can usually get it right doing it manually now but the accelerator pedal is so darn low on these cars you really need to rotate your heel over to blip the throttle with the right side of your shoe perfectly to get the right amount of revs.

To find the perfect heel & toe downshift RPM I think you could just rev the car in neutral on a warmed up engine and find out what TPS value is needed to reach say 7k (or figure out what TPS is needed for the RPM you want). Then when you downshift and blip the accelerator peddle it can be a bit harder than needed to get your RPM's since it will cap at whatever TPS is needed to reach 7k.

Possibly you could apply a similar TPS cap when upshifting with the throttle pinned to the ground. I'm unsure how that will keep full boost between shifts since now there is sigificant flow entering the engine. Restricting TPS will drop the boost down but it's hard to know without testing. How do most NLTS setups work currently, just a rev limiter when clutch is in? I'm thinking just being able to maintain ~10 psi of boost beats dropping to 0 between shifts by a longshot.

I've been testing TPS limiting during winter driving and it really makes the car more sane in low traction situations. You can basically custom tailor the power delivery map and adjust the max TPS at any RPM point you want and doing that per gear might also allow you to perfectly dial in a drag launch for maximum traction right at the edge of wheelspin. I know the MR is cursed with this being too conservative for 1st gear launching on bigger turbos but making it adjustable and per gear would be quite usefull. That way you could pin the accelerator on launch and not have to worry about modulating it as much when full boost kicks in to avoid excessive wheelspin.

Heck instead of a stupid default "throttle off" ASC mode where any wheel spin is countered with complete loss of power, if we could adjust how far it dialed back the power or TPS to our chosing you could really improve the traction control in a MAJOR way when it comes to performance driving.

 

Not to mention you can just set the idle part of that launch map to normal values below 3000 RPM / 100 load.

---

I'm still highly interested in a road-race synchro-rev-match mode With electronic throttle you would basically pin the butterfly valve (or set it really high to 70%+) and then set a rev limiter at exactly the revs it should be at for the speed you are going.

(see the following 3 posts for my description / pseudo-code for the CT9A ECU)
https://www.evolutionm.net/forums/ec...ml#post7032875

https://www.evolutionm.net/forums/ec...ml#post7034553

https://www.evolutionm.net/forums/ec...ml#post7035342


...that said, its generally pretty easy to rev match in the X for me on the stock clutch... but it would be much easier and smoother if the car did it for me

I could seriously see something like that providing for some pretty amazing reductions in laptimes with corner entry confidence being up.

 

Unless I am understanding what you typed incorrectly, you are going to get some serious brake suckage without vacuum. Which wouldn't be so good for lap times.

 

There's so much UNRELATED nonsense in this thread. Heel and toe with antilag while engine braking in vacuum combined with this system not working while downshifting... WHAAAAAAAAAAAAAAAAAT?!??!?!?!

Can those that are posting at least know what the point(idea) of this thread is in the first place?


(Sorry for such an outbreak but the ignorance of some people that come in to a topic, try to think about what the title actually meant and write about what they need in their car just makes me sick.)

 

I think the point was that anytime you push the clutch down (in?) we need to figure out what the benefits or consequences of changing the maps would be regardless of upshifting or downshifting.

Besides you don't even have an Evo X anymore, no need to get all rabid about it!

 

Sorry, I'll update my cars so I'll have your permission to express my opinion.

 

Hiboost, have you tried heal-toe where you do more of a side to side foot thing. Stick the part of your foot just under your big toe on the very edge of the brake pedal and roll your little toe side over and hit the gas. It's super easy to do that way.

 

I'll experiment with that technique and see if it works more consistantly. It was much easier to pull off on the Z06 Corvettes I drove at the track, that's for sure.

I don't think the ECU knows or checks for the brake pedal being depressed but I could be wrong.

Probably if your stationary limiter is set for 5500 you would have to code it to be rpm > 5200 since it bounces around a bit. You really wouldn't want it cycling maps back and forth rapidly. Somehow doing throttle limiting seems to be a good idea, although with the TPS maps it's still not 100% known which of the four maps kick in for which situations which can make it annoying to alter them. If we could figure out which maps do what, you could have one map always kick in with clutch depressed and really have some fun.