olddragger

iTrader: (3)

I didnt know what thread to post this on ---so I'll just go here.
When running an FI car and having a functional TCS and DSC --when those systems activate---do they retard timing AND cut fuel(just speaking about the engine side here)? Should there be a concern activating these systems when you are driving hard and at the upper rpm limits? i dont think i want my fuel cut while i am boosting up high heh
i am thinking it may be better to deactivate these system for a track day event etc?
oldscdragger

mysql101

only thing i've noticed is it preventing wheel spin, and sometimes it thinks something crazy happened and disables itself. the traction light goes on and stays on, and from that point the car electronics does nothing.

so no ill effects from what i've seen.

olddragger

iTrader: (3)

doesnt cut fuel?
OD

dannobre

iTrader: (3)

I'm sure they can flash those problems away

I think it closes the throttle body?? Might be wrong tho...

olddragger

iTrader: (3)

I would hope so--but am not sure.
OD

staticlag

Hmm, thats a really good question...

I wonder if the DSC engine cut(fuel, timing) even works with the interceptor x installed. This would probably explain mysql's no problems at this point.

Its probably a different story with people running engine flashes like olddragger

swoope

iTrader: (5)

yep,

that is one of the advantages of a drive by wire throttle.. dont recall where i read it.

that is what happening to chrisrx8pr when he has been trying to test the new turbo on the dyno..

beers

sixgen3sgte

I think the traction control on the rx8 primarly uses the rear brakes to stop wheel spin

i found this out when a shop was trying to dyno my car when it was stock and didn't turn off DSC, i noticed the rear brakes glowing orange so thats when i asked if they turned off the DSC.

dannobre

iTrader: (3)

Sure they didn't leave your emergency brake on That would be much more likely

sixgen3sgte

no they didn't i was in the passenger seat

sixgen3sgte

and after i hit the button and turned it off, it workd fine

olddragger

iTrader: (3)

Somehow i am thinking that it is not actually closing the TB, rather injector cuts. Gut feeling. For us pettit /flash folks this could be very important

oscd

swoope

iTrader: (5)

od,

i recall chris saying he was watching the throttle closing with a scan tool during the problem dyno runs...

and yes i do understand your concern.. it is a very good point.. i am sure mm will chime in soon..

beers

Brettus

iTrader: (2)

I did some high speed runs (for MM) to see what was happening with my speed limiter when it cuts in . We came to the conclusion that the only thing it did was close the throttle - all the other parameters changed to suit that condition but the throttle closing was the only thing directly triggered by the speed limiter .
Same should apply for TCS & DSC with the addition of braking .

I have the logs if anyone is interested .....

dannobre

iTrader: (3)

I doubt that it would cut fuel only...that's asking for it...and it's also way too abrupt to be safe in a TC situation.

TB makes the most sense. I'm going to pull the book out and have a read see what it says

Brettus

iTrader: (2)

hey Danobre - just noticed I'm closing in on your post count - better get busy -heh

olddragger

iTrader: (3)

Sounds like tb cut is going on---much relief here! I hope no one else finds anything diff. Still if i plan on a good hard run --from now on i think i will shut that system down.
OD

Red Devil

OD, this isn't particularly at you just a general comment...but I always wonder why no one just calls the manufacturer and asks these questions? Pettit designed the kit, they collaborated on the flash, etc...they should know the answer and can allay your worries.

All anyone on this forum can give regarding this specific subject is speculation. Pettit, can actually give you the facts.

olddragger

iTrader: (3)

Good idea--thanks Red Devil. Sometimes the obvious is not easily seen. I think I will give Cam a call.
OD

Moostafa29

x2.

I'm not sure if the TC/DSC works correctly with the Interceptor. I seem to remember spinning a lot, especially when it was wet, and it just kept on going.