hadyn Posted May 3, 2005 Share Posted May 3, 2005 Does the stock traction control limit or slow down the build up of boost on a tt? I ask this as i floored my car in the wet today and noticed that i wasnt building any boost from the reading on my gauge and the TC light flickered on and off and then it suddenly boosted normally again Quote Link to comment Share on other sites More sharing options...
merckx Posted May 3, 2005 Share Posted May 3, 2005 The stock traction control is crap and drastically cuts the power from the engine(especially in the wet) and this will reduce boost. Just like taking your foot off the accelerator. Quote Link to comment Share on other sites More sharing options...
hadyn Posted May 3, 2005 Author Share Posted May 3, 2005 yep, similar sensation it didnt feel like fuel cut but the car moved briskly just not as it does on boost, then the boost gauge shot up and the power came back online. I know the TC cuts engine power, but I never thought it would restrict boost Quote Link to comment Share on other sites More sharing options...
merckx Posted May 3, 2005 Share Posted May 3, 2005 If you reduce engine power then you'll have less exhaust gas flow so the turbo's won't turn as quickly so you'll have less boost. The revs of the engine will have dropped when you lost traction but will go up again when you regain traction so the boost will go up again. Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 3, 2005 Share Posted May 3, 2005 Well, the stock TC uses a flint-axe approach of shutting a butterfly plate in the throttle body. This limits air to the engine, so less exhaust gas is produced, so boost falls off. Better TC systems that cut ignition or injectors do it on a pulse-by-pulse basis so engine power is strictly limited to available grip by rapidly altering the power output. Boost doesn't drop off noticeably because it's not just some big four-second-long bitchslap. -Ian Quote Link to comment Share on other sites More sharing options...
hadyn Posted May 3, 2005 Author Share Posted May 3, 2005 But the boost didnt drop off, it didnt boost while i pressed the happy pedal. Well it did boost probably to about 0.1 or 0.2 bar though and then boost came on loverly again Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 3, 2005 Share Posted May 3, 2005 Well, this trac throttle plate is almost shut, so it's like you have your foot only 20% down. Doesn't matter how much wider you opened the throttle, the other plate is the restriction. Therefore, minimal boost until that plate opened up again. -Ian Quote Link to comment Share on other sites More sharing options...
hadyn Posted May 3, 2005 Author Share Posted May 3, 2005 Thanks for clearing that up Ian Im just curious though as this never seemed to happen before I decatted recently? Quote Link to comment Share on other sites More sharing options...
eyefi Posted May 3, 2005 Share Posted May 3, 2005 always turn the stock TC off, its like having your mum in the car. enjoying the decat? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 3, 2005 Share Posted May 3, 2005 This is why my parting words to you were that to get the best from the de cat you need to turn the stock TC off Doing this has become such second nature to me nowadays that it's as natural as turning the ignition key to "start" Your additional mid range torque means the TC is now kicking in where it would not have done prior to the de-catting. Quote Link to comment Share on other sites More sharing options...
hadyn Posted May 3, 2005 Author Share Posted May 3, 2005 TBH when 'pootling' to work i dont think of turning the TC off, when im in a 'spirited' mood the TC is always switched off Plus my front tyres are past their sell by date so I keep the TC on not to get myself into serious trouble I hate stock TC like anyone else btw Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 3, 2005 Share Posted May 3, 2005 Plus my front tyres are past their sell by date so I keep the TC on not to get myself into serious trouble Front tyres aren't affected much by traccy control in a RWD car Chris - I used to switch off the Trac as part of the startup sequence, then I saw sense and installed the trac ECU into my garage shelving. Minimal wiring and those shelves have never broken traction since Freed up loads of space for the fields harness and the O2 sensor module too, how handy -Ian Quote Link to comment Share on other sites More sharing options...
Nic Posted May 3, 2005 Share Posted May 3, 2005 TBH when 'pootling' to work i dont think of turning the TC off, when im in a 'spirited' mood the TC is always switched off Plus my front tyres are past their sell by date so I keep the TC on not to get myself into serious trouble I hate stock TC like anyone else btw Even when you're pootling around the stock TC can be down right dangerous IMO. I have a very bad junction onto a busy main road near where I live. I remember when I first got my car, waiting for a gap in the traffic then going to pull out onto the main road, it was wet and I was in a hurry to catch the gap, the TC cut all power and I ended up half way across the road with no power and a bloody great bus coming at me. After that experience I fitted RLTC, pulled the TRAC fuse and have lived with the anoying flashing orange light ever since Quote Link to comment Share on other sites More sharing options...
imi Posted May 3, 2005 Share Posted May 3, 2005 is there a way to get rid of that flashing light...? Quote Link to comment Share on other sites More sharing options...
geoffvalenti Posted May 4, 2005 Share Posted May 4, 2005 is there a way to get rid of that flashing light...? Taking the bulb out usually works Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 4, 2005 Share Posted May 4, 2005 Take the ECU out and make sure you have a facelift car No flashy light, I hear that removing the ECU on pre-facelift causes the flashy light? -Ian Quote Link to comment Share on other sites More sharing options...
tbourner Posted May 4, 2005 Share Posted May 4, 2005 Nope, no ECU and no flashy light. The button for switching it off still lights up though. It also means no ABS though doesn't it? Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 4, 2005 Share Posted May 4, 2005 Mmm, nope, that ECU sits behind the stereo. And my ABS still works -Ian Quote Link to comment Share on other sites More sharing options...
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