CJ Posted August 21, 2005 Share Posted August 21, 2005 Anybody got one of these lock-up switches and can answer the above question please? I have a BL box with 3800 TC and a lock up switch. I use the lock up switch to stop the box changing down everytime you put your foot on the loud pedal - eg when cruising down the motorway and needing extra power to overtake, you dont necessarily want the thing to kick down and the lock up switch stops this happening. Quote Link to comment Share on other sites More sharing options...
Jake Posted August 21, 2005 Share Posted August 21, 2005 So a lock-up switch makes it a fixed connection between between the engine and gearbox, right? What would happen if you left it locked and slowed to a standstill, the engine would stall? Quote Link to comment Share on other sites More sharing options...
CJ Posted August 21, 2005 Share Posted August 21, 2005 Yes - and the first couple of times it happens it frightens the feck out of you!! Quote Link to comment Share on other sites More sharing options...
Justin Posted August 24, 2005 Author Share Posted August 24, 2005 I have a BL box with 3800 TC and a lock up switch. I use the lock up switch to stop the box changing down everytime you put your foot on the loud pedal - eg when cruising down the motorway and needing extra power to overtake, you dont necessarily want the thing to kick down and the lock up switch stops this happening. I think Matt Harwood knows how to fit a lock up switch. I think it is just a case of tapping an on/off switch into the right wires in the ECU. Quote Link to comment Share on other sites More sharing options...
CJ Posted August 24, 2005 Share Posted August 24, 2005 I think Matt Harwood knows how to fit a lock up switch. I think it is just a case of tapping an on/off switch into the right wires in the ECU. He did mine. I now use the OD button on the gear stick as the lock up switch and have a seperate switch to turn the OD off and on. Quote Link to comment Share on other sites More sharing options...
Jake Posted August 24, 2005 Share Posted August 24, 2005 I think Matt Harwood knows how to fit a lock up switch. I think it is just a case of tapping an on/off switch into the right wires in the ECU. Really? I can't imagine how that could work. A torque converter is a mechanical thing, no electrics involved. What am I missing here? I have ordered a High Stall, so I'm very interested in this subject at the mo. Quote Link to comment Share on other sites More sharing options...
tDR Posted August 24, 2005 Share Posted August 24, 2005 I've driven a BL67'd car running a 3800 stall and BL box. It kinda felt like the car was hunting for a gear all the time when driving normally but you soon get used to it. I didn't think it made the car undriveable at all, and when you nail the throttle... Quote Link to comment Share on other sites More sharing options...
b_have Posted August 24, 2005 Share Posted August 24, 2005 My lock switch is mounted on the steering wheel (Momo). Use it constantly for upshifts and as CJ says, to prevent downshifts (especially around town when sounding like an F3000 wannabe!) Quote Link to comment Share on other sites More sharing options...
Holly Posted August 24, 2005 Share Posted August 24, 2005 Really? I can't imagine how that could work. A torque converter is a mechanical thing, no electrics involved. What am I missing here? (Christian here) I believe it's something like the electrical circuit causes the gearbox to pump fluid around that engages a clutch-type mechanism that locks it up. The 'clutch' is only intended to hold it steady (e.g. cruising) and you're not supposed to accelerate hard with it activated or you will wear it out. Quote Link to comment Share on other sites More sharing options...
Jake Posted August 24, 2005 Share Posted August 24, 2005 Oh I see. Thanks a lot Christian. I'll have to find out which ECU wires I need to connect the switch into. I might have just found a use for those unused Tiptronic buttons on my steering wheel. Quote Link to comment Share on other sites More sharing options...
Sharpie Posted August 25, 2005 Share Posted August 25, 2005 some good feedback here Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted August 25, 2005 Share Posted August 25, 2005 i used to have a 3800 then had trouble with gearbox so i orderd a 4000 tc so not to have any downtime.im on stock twins on a 4000tc and it fine driving to me.you will find you light tyres up so easy.i found out on street tyres if you put foot down it lights up the tyres and get a lot of wheel spin as tyres were not gripping, rltc seem to help me. with drag radials they so grippy you dont need the rltc. when i went to pod it was 1st time out on drag radials and new 4000tc did 2 1.8 60 foots and my best of 1.730 the last run i fluffed up trying to give it too much revs off the line and the rear tyres gripped that much it pushed car through beam, could not hold on foot brake. was chuffed first time out on drag radials and 4000tc that i got the best ever launch i have had on 4 attempts.seems to jump off the line when you get it right. dont expect too much on street tyres. also launching harder could break something. an auto gearbox is pretty cheap to replace. when i was looking into them i was recomended to go with 3200. but went with a 3800 then bought a 4000. on supra forums the PI tc seems to get slated. Quote Link to comment Share on other sites More sharing options...
Sharpie Posted August 25, 2005 Share Posted August 25, 2005 is the gearbox the same on UK & JDM ? sounds like the 3800 is the one to start with and then upwards if you want more... Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 25, 2005 Share Posted August 25, 2005 is the gearbox the same on UK & JDM ? Yes. Jake, I know how to do it on a 'normal' ECU, but I haven't got a clue about the VVTi. Sorry All the wiring info I have on the VVTi, only seems to cover engine components. I haven't seen any info on the gearbox to date. I'd guess that the plug in the gearbox would be the same though, so if I can find out where it plugs in, we may be able to trace it back from there... Quote Link to comment Share on other sites More sharing options...
Sharpie Posted August 25, 2005 Share Posted August 25, 2005 Ta Matt Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 25, 2005 Share Posted August 25, 2005 Pete, I've just been told, there could be a difference if the tail section of a UK box, so I retract my previous 'yes' This isn't certain, so it still could be, but you'd need to check to be certain. Whenever we've ordered a BL autobox, they ask if it's for a JDM car, hence the uncertainty. Quote Link to comment Share on other sites More sharing options...
Sharpie Posted August 25, 2005 Share Posted August 25, 2005 No problem, I'm in good shape I was just thinking along the lines of what Monkey was saying re: Auto boxes being cheap to replace - There are more Jspec auto boxes around than UK spec. Quote Link to comment Share on other sites More sharing options...
Jake Posted August 25, 2005 Share Posted August 25, 2005 Jake, I know how to do it on a 'normal' ECU, but I haven't got a clue about the VVTi. Sorry I'm putting the high stall TC into my '93 RZ actually Matt. I may have confused things by mentioning my Tiptronic steering wheel but I have a non functioning Tiptronic wheel on the RZ as well the one on my other car. So, how to do it? Quote Link to comment Share on other sites More sharing options...
Justin Posted August 25, 2005 Author Share Posted August 25, 2005 Yes. Jake, I know how to do it on a 'normal' ECU, but I haven't got a clue about the VVTi. Sorry All the wiring info I have on the VVTi, only seems to cover engine components. I haven't seen any info on the gearbox to date. I'd guess that the plug in the gearbox would be the same though, so if I can find out where it plugs in, we may be able to trace it back from there... Sh*t didn't think of that. I've got a Blitz Access ECU so probably won't be able to fit a lock up switch Quote Link to comment Share on other sites More sharing options...
CJ Posted August 25, 2005 Share Posted August 25, 2005 Sh*t didn't think of that. I've got a Blitz Access ECU so probably won't be able to fit a lock up switch I have a Motec M800 and it works fine with that Quote Link to comment Share on other sites More sharing options...
Robbie Posted August 25, 2005 Share Posted August 25, 2005 Try this link: http://www.utahracing.com/Tech/lockup/Lockup.htm Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 25, 2005 Share Posted August 25, 2005 I'm putting the high stall TC into my '93 RZ actually Matt. I may have confused things by mentioning my Tiptronic steering wheel but I have a non functioning Tiptronic wheel on the RZ as well the one on my other car. So, how to do it? Ahh, that's easy then. Get a relay, and find pin 14. on the main ECU. Wire up the relay so that pin 14 goes through the relay 'normally closed', then use the switch to activate the relay, putting an earth to the ECU on pin 14. I can probably do a diagram if it helps but I'm not very good with computer graphics programs Quote Link to comment Share on other sites More sharing options...
Justin Posted August 25, 2005 Author Share Posted August 25, 2005 I have a Motec M800 and it works fine with that Yeah but there are still people that roam this earth who can map and have pinouts that aren't there Col? Quote Link to comment Share on other sites More sharing options...
Axle Posted June 30, 2008 Share Posted June 30, 2008 Resurrecting an old one here. Im tempted to go for a torque converter of about 3000rpm 3200 at most. Dont really want to affect the drive too much from how it is now. But what i was curious about, was would the higher torque converter make a difference to rolling accelerating. So if i was to overtake another moving vehicle for instance? Quote Link to comment Share on other sites More sharing options...
paul mac Posted June 30, 2008 Share Posted June 30, 2008 But what i was curious about, was would the higher torque converter make a difference to rolling accelerating. So if i was to overtake another moving vehicle for instance? oh yes it does , if your revs are fairly low when you snap the throttle open the revs come up very fast to the stall point so you get no noticable lag and are not waiting for the engine to spool the turbo Quote Link to comment Share on other sites More sharing options...
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