richardjh

I'd very much like to have a play with those maps! 2 maps, in my case - no S/Sport mode on RA.

I recently had a very experienced mechanic (old-timer) tell me the car scared him witless when he pulled out in traffic during a test drive - due to the initial "thinking about it" pause as the ECU raises revs before engaging clutch on a standing start.

As I noted above, the computer can't read minds. But if there is a way to shave even 1/5 second off that initial delay with a throttle "delta" tweak, it's surely got to help.

Rich

RazorLab

iTrader: (8)

I forgot about these. Are they defined the same as before or do you have updates?

I can test them out but just want to make sure I have the latest.

tephra

iTrader: (6)

no same as always...

RazorLab

iTrader: (8)

unit8?

tephra

iTrader: (6)

yeah 0-255.

Percent255 works as well, since 255 = 100%

but uint8 will be fine...

To me those tables always looked like throttle ramp up rates... There is a 4th table for 5MT as well...

So in lower gears you need more throttle for anything to happen... But in SSPORT you get max throttle response... thats why I always ask does the "take off lag" exist in SSPORT??

And before anyone ask's Bryan and I have been sitting on these tables for a LONNNNG time... like many others just never got around to testing them properly...

Mad_SB

iTrader: (8)

Let me know if you guys need testing help... I'm also a 2010 ra sport back, though mine still has the little baby turbo on it

menasor

There is still some lag in first gear, but i felt a huge improvement between an 08 ralliart sportback and my 11 MR. In the sportback, even with a mild foot on the gas pedal, it would still lag a bunch (barely move for 1-2 seconds) before actually moving and then giving me way too more acceleration than I wanted. In the 11 MR, I feel much much less lag moving from a complete stop, and there the "lag" is definitely less pronounced.

tephra

iTrader: (6)

So noone can tell me if SSPORT gives better throttle response when taking off from a stop???

Beeble

IMO it's better in SSport.
less input lag, for want of a better phrase.

tephra

iTrader: (6)

but what about takeoff lag?

ie the lag when trying to move the car from standstill?

Beeble

^ ie the lag time from when you tap the throttle to when the thing decides to move?
that depends on 2 things as you know...
1) time for the clutch/gear to engage
2) throttle input lag

item 2) is definitely better in SSport vs Normal, it feels like there is "smoothing" at work for all throttle inputs in Normal mode
item 1) - honestly i can't convince myself that from a dead stop with brake on, then hitting the throttle, if SSport is quicker to engage than Normal mode. You can feel when this happens, and the car will start to move off.. but in Normal it seems to take longer to register 100% TPS input Vs in SSport (ie item 2 )

^^I'm interested if other SST owners agree with this assessment, or if it's just me!

D, you really should spend 10 minutes in my car one day and cycle through the modes and what take off from dead stop and on-the-roll throttle inputs feel like. Very weird, after a 5MT.

mrevo10

Reviving an old thread..

I totally agree with you Beeble.. S/Sport mode definitely makes the throttle response much quicker, but I hate using S/Sport mode when driving in the city...it throws you into gear. S/Sport is great when you are MOVING. It seems though its the best way to improve response on a stock TCU tune... In normal and sport mode when you take off at an intersection quickly you have to contend with the delay in throttle response as well as the delay in clutch/gear lag.

I am interested to know who has the best resolution for this issue and developed a well respected software solution for a 2009 MR SST approaching 400hp.

Hiboost

iTrader: (9)

I know i've posted this trick in other threads but you can alter your 1st Gear TPS Limiter table to something like this to get the clutchpacks to engage faster off the line in 1st gear:

500 = 100
1000 = 100
1500 = 30
2000 = 100
2500 = 100
3000 = 100
3500 = 100
4000 = 100
4500 = 100

Beyond 4500 you will likely have to start dialing back TPS again as you just hit full boost in 1st gear and the more horsepower your cars has the more TPS you have to dial back so that it can complete a 1st -> 2nd upshift.

There are other tables that will have an effect as well but the side effect can be very sensitive throttle. Personally I think it's worth it but anyone driving the car for the first time will feel like it has a hair trigger.

domyz

iTrader: (6)

Nice idea, it's like an automatic throttle blip !

Another thing that makes this stop/start delay worse is when the transmission is cold, god it's slow to engage the clutchpacks. When it's warmed up, it's much more responsive.

I'd love to find a more direct way to lower the engagement point that the TCU chooses based on throttle input.

Jon Hovie

Let your SST warm up and responds perfectly!