legendswraith Posted May 8, 2009 Share Posted May 8, 2009 I'm looking at the possibility of setting up the EMU launch control feature and i have been informed that its more than likely a no go without a high stall converter. I have had a search and found some information on selection etc but i am looking for some advice from those with the experience of fitting/using one. Currently the car is BPU+ with a set of hybrids going on as soon as i build them and i don't want to discount the idea of going single in the future , so i want some form of futureproofing. From what i can gather the usual range is a 3600-3800 stall converter, but is it a straight fit to the Jspec vvti box or are other things required? I am aware of requiring an aux oil cooler etc. So any recommendations and information would be gratefully received Quote Link to comment Share on other sites More sharing options...
paul mac Posted May 8, 2009 Share Posted May 8, 2009 basically you need to match the stall to where your power is made, so for example a T61 size tubby will be in the 2800-3100 rpm range so the ideal stall is a 3200, if you go for a higher stall on a turbo of this size you achieve no gain and if you stick with the stock stall you will have lag, if you go for a bigger turbo such as a T67 you will obviously need a higher stall so will be up at the 4000rpm range stall, i would say a T67 is about the limit on an auto anyway be that built or not (unless you go for a specialist yank box). If you are BPU a 3200 (smallest of the aftermarket stuff) would be good and an improvement over the stock stall. There are quite a few on here that run the T61 size turbo on a 3200rpm stall and they work superbly Quote Link to comment Share on other sites More sharing options...
legendswraith Posted May 9, 2009 Author Share Posted May 9, 2009 Just the job that was exactly the information i wanted. Prevents me from having to buy one then eventually buy another. Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 9, 2009 Share Posted May 9, 2009 The EMU launch control doesn't seem to work on Supra ignition, the engine management has a right hissy fit and cuts all ignition until the revs drop significantly, rendering it the slowest bounce off the limiter known to man Thanks Paul for that clear and concise post -Ian Quote Link to comment Share on other sites More sharing options...
legendswraith Posted May 9, 2009 Author Share Posted May 9, 2009 So its the ignition that causes a problem as well, is this on the individual coiled engine or the vvti with the lost spark? Would fitting something along the lines of a DLi clear it up. My own initial experiments with it prior to looking at the higher stall was it was more of a lurch control than a launch. Nothings ever simple is it Quote Link to comment Share on other sites More sharing options...
dude Posted May 9, 2009 Share Posted May 9, 2009 basically you need to match the stall to where your power is made, so for example a T61 size tubby will be in the 2800-3100 rpm range so the ideal stall is a 3200, if you go for a higher stall on a turbo of this size you achieve no gain and if you stick with the stock stall you will have lag, if you go for a bigger turbo such as a T67 you will obviously need a higher stall so will be up at the 4000rpm range stall, i would say a T67 is about the limit on an auto anyway be that built or not (unless you go for a specialist yank box). If you are BPU a 3200 (smallest of the aftermarket stuff) would be good and an improvement over the stock stall. There are quite a few on here that run the T61 size turbo on a 3200rpm stall and they work superbly Ran mine with a 74 GTS on a BL kit and BL box seemed to go quite well and won a few races:innocent: Quote Link to comment Share on other sites More sharing options...
legendswraith Posted May 9, 2009 Author Share Posted May 9, 2009 All good stuff, theres only so much researching via tech publications and vendors sites can do theres no substitute for finding out from someone who's actually experienced it. Give it a month or so and i'll invest in one. Any recommendations on sources etc? Quote Link to comment Share on other sites More sharing options...
paul mac Posted May 9, 2009 Share Posted May 9, 2009 Ran mine with a 74 GTS on a BL kit and BL box seemed to go quite well and won a few races:innocent: appreciate that Dude but at that level i'm sure you would agree the next run could have been when it all went Kablamo , with regard to the EMU launch control i am a bit confused over what advantages this would give over power braking Quote Link to comment Share on other sites More sharing options...
dude Posted May 10, 2009 Share Posted May 10, 2009 appreciate that Dude but at that level i'm sure you would agree the next run could have been when it all went Kablamo , with regard to the EMU launch control i am a bit confused over what advantages this would give over power braking Obviously the more boost you run etc the higher chances of a mishap, in fact the BL box did fail when Matt Harwood came to collect the car for me. Just saying it still launched well enough to run 10 sec 1/4 miles etc and when dimitri mapped it on the road with race fuel at 2.5 bar the top speed was up over 200mph (worked out by rpm and tyre diameter) Quote Link to comment Share on other sites More sharing options...
legendswraith Posted May 11, 2009 Author Share Posted May 11, 2009 appreciate that Dude but at that level i'm sure you would agree the next run could have been when it all went Kablamo , with regard to the EMU launch control i am a bit confused over what advantages this would give over power braking Not that i have ever had chance to use it yet but from what i interpret its basically foot to the floor whilst standing still puts it into "launch" mode then you set up the EMU to the best launch conditions which it automatically applies when the brake is released. Quote Link to comment Share on other sites More sharing options...
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