NefMoto

I haven't heard too many people discuss this, but kfwdksmx
is where to open the throttle plate earlier, instead of the stock map that many ots companies still run.  I got the idea to look for it from that jhm 1/4 mile video where they said the throttle opens sooner in the credits.

I asked this before and didn't get much back. I plan to do some testing with it once I get everything sorted. I have noticed that VAST and others adjust it.

http://nefariousmotorsports.com/forum/index.php/topic,654.0.html

The consensus seemed to be it didn't make much difference .. but please let us know if you see results

I have been opening mine early for a long time, but in reality it doesn't make a difference as the engine still isn't being throttled enough to cause a restriction at those low rpms.

Rick

Meh I let mine open 100% by 2500 or 3000 (can't remember which now)... I've noticed no difference at all.

It only matters on big turbos.  My throttle is 100% right out of idle rpm.

That's along the lines of what I was thinking.  can u coment on the differnce if you open the throttle later.

A bigger turbo and more boost actually makes throttle plate angle less important. If you have ever tuned alpha n, atmospheric pressure is reached at very small throttle openings at low rpm.

Rick

Well it makes a 800-1000 rpm difference in spool so I am going to stick with my line of thought.

With the map stock an no other changes with timing/afr or anything to try and spool faster it was a huge difference.  25psi wasn't happening until 4500-5000.  With it revised I can be fully spooled by 3500-3800

Wow, those are pretty substantial gains.

I still don't get how opening the throttle earlier would make a difference in a big turbo kit that spools SLOWER than k04s?

I agree... your spool isn't limited by flow of the TB but rather the turbo itself.

I think of it as relieving some pressure off the charge air side.   like running a pump with the discharge valve 1/2 open vs. full open.  I agree that the major hold up is on the hot side, but every little bit should help.   

When I really think about it and try to picture why it doesn't make sense.  But fact is that on all drive by wire cars that I have messed with this is the case. 

It is heavily documented on newer suby stuff also.

Maybe the bigger turbos fight against the flow restriction where as small frame turbos fight to fill.  One thing I know for sure is that the whole limited throttle angle thing is intended for smooth operation or "refinement" as Bosch puts it. 

Can anyone confirm if this map is also on the me7.5 1.8t ECU's? I want to try it as well.

Yes it is, on the 8n0906018CB its at 0x14FFC if thats any help.

anything helps, going top pull up one of those files and compare the table to mine to find it.

What ecu part number you running?

Just food for thought, but don't think about the throttle plate restricting the amount of air the turbo can pump past the TB but rather how much it restricts the vacuum that the engine applies to the compressor wheel in conjunction with the exhaust flow on the turbine. An N/A engine is going to want as little restriction to air flow for it's volumetric efficiency. Is it going to help on smaller frame turbos? No, probably not. Is it going to help on larger turbos? Yes. However, not probably as drastically as Snow Trooper leads on.

06A906032SK....I didn't expect a huge difference, but any little that will help spooling my gt30 is better than nothing.

Hmm, I notice when I rev the car up to high rpm, shift gears, the car pulls a really strong vacuum -24 in and it stalls if I don't blip the throttle. Normally it idles at -20, could this help with my stalling issues?

What does any of this have to do with idle?

Throttle body controls the
 air flow into the engine, I was thinking about the engine starving of air because this isn't calibrated correctly. I'm a noob sorry if I ask stupid questions.

Sent from my 831C using Tapatalk

What does this have anything to do with kfwdksmx?

Also, how does it take you so long to shift that the motor has returned to an idle state?

I didn't know that's why I asked, I have been trying many things trying to rule things out. It doesn't take that long for me to shift. I just know something isn't right with the car I should be able to put the car in neutral without it stalling.

Sent from my 831C using Tapatalk