paulrenn Posted November 19, 2003 Share Posted November 19, 2003 Hi all Quite a few people on the BBS have "gone single". I'd like to start a list of which components are needed to do the conversion properly (I don't think it exists in a single place, currently). What choices of turbo have been tried and have been successful? Which manifolds are available? Which fuel delivery system is recommended (if coming from Jap/UK spec starting point)? What intercooler or other cooling upgrades are required? What engine management/electronics would be needed? What boost level is sensible? Where to source all of the above components? Labour I will do myself or get associates to help Basically, I know the general answers having worked on few other turbo cars, but I don't know which solutions have been tried and tested on the Supra. I really am only interested in solutions that have been personally tested by people on the board - not "I see on Supraforums that they achieve 1000 BHP by just using 88 octane unleaded and a bleed valve..." There are of course millions of permutations, but this might help identify a "preferred" course which is pretty much repeatable and the costs will be more or less predictable. I'm not particularly interested in 1/4 mile times, but that probably is a good indication of the expected results. Any dyno info also might be interesting, but I'm not expecting to race or run at the drag strip, I want an everyday car, so turbo response is very important. Branners, if this is repeated somewhere or is waste of space, pls remove... Cheers! Link to comment Share on other sites More sharing options...
Adam W Posted November 19, 2003 Share Posted November 19, 2003 I can only tell you what I've done, but I would recommend boostlogic.com for turbo, wg and manifold. I could write a thousand pages on turbo sizing and still only cover 10% of it, you will have to do some research yourself on this. Fuel system - depends on your bhp goals. Twin in tank pumps and ~850cc injectors should do you. Boost level - big turbos work best at around 25-30psi from what I've read. Be aware that you will need seriously high octane fuel to run this with any timing advance! Engine management - I'm going for the AEM, seems stupid to ask the ECU to hand four times the boost it's mapped for by "tricking" it. You will need a big IC and decent oil cooler, along with a few other bits and bobs. From your last sentance though, I would suggest that stock twins would suit you better . . . Link to comment Share on other sites More sharing options...
paulrenn Posted November 19, 2003 Author Share Posted November 19, 2003 From your last sentance though, I would suggest that stock twins would suit you better . . . Why do you say that? I would not bother asking the question if that was the case. Link to comment Share on other sites More sharing options...
Adam W Posted November 19, 2003 Share Posted November 19, 2003 Not having a dig or anything, it's just that you say that response is more important than peak power to you. You will get the most response with stock twins or hybrids, even a small single turbo will have noticeably more lag and less bottom-end grunt that the stock setup because you haven't got that tiny turbo spooling up at 1800rpm or wherever it is. Link to comment Share on other sites More sharing options...
Steve W2 Posted November 19, 2003 Share Posted November 19, 2003 Yeah from waht I've read/understand the larger the turbo the longer the spool time (generally) which makes low end responsiveness much worse than standard. However, when the big single gets going.......... Link to comment Share on other sites More sharing options...
Sharpie Posted November 19, 2003 Share Posted November 19, 2003 One of the BL units comes on at 3700 rpm How long does it take you to get to there..... Link to comment Share on other sites More sharing options...
Sharpie Posted November 19, 2003 Share Posted November 19, 2003 http://www.boostlogic.com/ The BL67 it is that comes on at 3700. $3.5k from BL or £3.6k from Miami Rice I see. Link to comment Share on other sites More sharing options...
Supraguy Posted November 19, 2003 Share Posted November 19, 2003 PHR Stage 1 Street kit is claimed to be full boost by 3600 rpm. Also, you can run stock fuel system. (Stock US, so 550cc injectors and reccomend Walbro pump) Thats kit is my plan for now. Link to comment Share on other sites More sharing options...
Adam W Posted November 19, 2003 Share Posted November 19, 2003 The BL67 is what I have, 3800-4000 is where it all starts happening on my setup; hoping to improve that by doing some proper mapping though! Not a big deal in my opinion, but it feels pretty dead below 3000rpm and theres 0.5 - 1.0s delay after hitting the gas even when you are in the powerband. I learned to live with it very quickly, but if you are used to the instant response of the sequential setup you might find it harder to deal with. Link to comment Share on other sites More sharing options...
TLicense Posted November 19, 2003 Share Posted November 19, 2003 How about this then, if you have a manual get an auto diff, if you have an auto convert it to a manual and keep the diff. Buy the biggest turbo and associated parafanelia (stuff) you can afford, and also rebuild the head so that you can rev the bar-steward to ten grand. That way you have responsive bottom end (due to lower ratio diff) and you have all the pleasures that a big turbo can give you. Plus the fact that you won't have to keep changing gears every 5 seconds because you can now rev it like a Civic-R Oh yeah if you want to keep the auto box your stuffed. Stick to stock twins:p Anyway didn't we cover at what point different turbo's are on song by about a week ago?? Regards Link to comment Share on other sites More sharing options...
dude Posted November 19, 2003 Share Posted November 19, 2003 Will the car be Auto or Manual ??????? You will need to budget for transmission/clutch work with a big single Dude:flame Dev Link to comment Share on other sites More sharing options...
paulrenn Posted November 19, 2003 Author Share Posted November 19, 2003 Hmmm...not many folks actually *done* the conversion here, except Adam...Not sure about the MKIII, was that a single turbo to start with? @Dude - 99% likely will be manual. I drive an auto car every day for work, and coz its easier with the family etc, but for sports driving I would really only want a manual. I just like the extra little bit of control I feel I have with that (probably subjective feeling). I know for sure an auto would be quicker. But this is the way I want to do it. For pure responsiveness, an NA would be even better :flame Dev but I don't think anyone's suggesting that?! Stock twins are OK but a little lame when you have to prove a point. Has anyone tried the Garrett ball bearing range (GT) of turbos? I think I will go my own way on this in 2004. I'm contemplating getting the complete kit fabricated locally - intercooler, manifold, exhaust, fuel rail, BOV, with a Garrett turbo. If the AEM is really a GEMS, then I can get the tuning done at the same place too. If it is successful then I could offer off-the-shelf complete kits for others too. Another Q which I may have raised previously (don't remember anymore...), could a custom twin setup work be made to work with non-identical turbos? This would be a good solution...smaller turbo (maybe even smaller than the current one) just to get the party started, then 2nd turbo much bigger. Could even feed 2 cylinders to the 1st and 4 to the 2nd. Would be quite cool to try, and one hell of a kick when it got running! But first I wanna hear your success stories to see whether it is worth the hassle! mode> Link to comment Share on other sites More sharing options...
dude Posted November 19, 2003 Share Posted November 19, 2003 Originally posted by paulrenn Hmmm...not many folks actually *done* the conversion here, except Adam...Not sure about the MKIII, was that a single turbo to start with? @Dude - 99% likely will be manual. I drive an auto car every day for work, and coz its easier with the family etc, but for sports driving I would really only want a manual. I just like the extra little bit of control I feel I have with that (probably subjective feeling). I know for sure an auto would be quicker. But this is the way I want to do it. For pure responsiveness, an NA would be even better :flame Dev but I don't think anyone's suggesting that?! Stock twins are OK but a little lame when you have to prove a point. Has anyone tried the Garrett ball bearing range (GT) of turbos? I think I will go my own way on this in 2004. I'm contemplating getting the complete kit fabricated locally - intercooler, manifold, exhaust, fuel rail, BOV, with a Garrett turbo. If the AEM is really a GEMS, then I can get the tuning done at the same place too. If it is successful then I could offer off-the-shelf complete kits for others too. Another Q which I may have raised previously (don't remember anymore...), could a custom twin setup work be made to work with non-identical turbos? This would be a good solution...smaller turbo (maybe even smaller than the current one) just to get the party started, then 2nd turbo much bigger. Could even feed 2 cylinders to the 1st and 4 to the 2nd. Would be quite cool to try, and one hell of a kick when it got running! But first I wanna hear your success stories to see whether it is worth the hassle! mode> Paul, good luck with the project but i dont think you will be able to offer anything in the same price range and equivalent quality to what is allready available , how about developing a conv. kit to put in a small block chevy lump and box or use the toyota box , massive torque , superb reliability , and much better sound , no lag and cheap bits . 600hp is not unrealistic in a dailly driver sbc , worth a thought dude !!!! Dude :flame Dev Link to comment Share on other sites More sharing options...
paulrenn Posted November 20, 2003 Author Share Posted November 20, 2003 Hi dude, Originally posted by dude Paul, good luck with the project but i dont think you will be able to offer anything in the same price range and equivalent quality to what is allready available Quality, yes, will be high...may not look as "shiny" as some around here like (ahem Paul E ) but I don't really care about that, I prefer functionality over form when it comes to engines. Price, will definitely be lower than "big brand" HKS etc. Probably a half price. Highest single component cost will be the turbo. As some mentioned before when I raised the subject, it will be an unknown source, so others won't "trust" it so probably won't buy it. But, I've worked with this fabricator before and he is a genius. He even has his own dyno in the basement...! How's that for commitment. how about developing a conv. kit to put in a small block chevy lump and box or use the toyota box , massive torque , superb reliability , and much better sound , no lag and cheap bits . 600hp is not unrealistic in a dailly driver sbc Eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeek! Not a Yank block in a Toyota, Shirley?! LOL. Seriously, I know a few Corvettes, and (IMHO - preparing to be flamed) they're pretty good cars. But, 320 BHP from a 5.7 L? Purleeeeze...LOL. I like my Jap Tech. Link to comment Share on other sites More sharing options...
Adam W Posted November 20, 2003 Share Posted November 20, 2003 I believe the complete boostlogic kit with manifold, turbo of your choice and decent wastegate, plus some exhaust and intercooler piping, is about £2200 + a bit of shipping and any duties you might feel the need to pay. I only bought the turbo from them but everything I've read about their kit suggests the quality is excellent. I think you will struggle to beat that price but if you're confident you can beat it then go for it! Link to comment Share on other sites More sharing options...
paulrenn Posted November 20, 2003 Author Share Posted November 20, 2003 Hi Adam I'll take a look, thanks. Link to comment Share on other sites More sharing options...
paulrenn Posted November 21, 2003 Author Share Posted November 21, 2003 Do I take it from the lack of replies, that not many have done the single conversion? Or is it that they are using "top secret" forumlas, or that they just don't even know what their single turbo configuration consisits of?! Link to comment Share on other sites More sharing options...
dude Posted November 21, 2003 Share Posted November 21, 2003 Paul im fitting a Boostlogic manifold /external wastegate, 67 GTQ turbo , 850 inj./ dual walboro pumps , i have a Large FMIC, Apexi SAF-C, ITC , will also be fitting a Hi-stall converter and a built transmission Dude:flame Dev Link to comment Share on other sites More sharing options...
paulrenn Posted November 21, 2003 Author Share Posted November 21, 2003 Good one, dude! Do you have the manifold already? How do you rate the quality, is it lightweight or feel sturdy? I'd like a nice heavyish iron one... Let me know how it installs and how driveable it is (I'm sure you will tho ) Link to comment Share on other sites More sharing options...
dude Posted November 22, 2003 Share Posted November 22, 2003 Will be buying the manifold as soon as my lexus sells , its the tubular polished:) one on our web site , i am asured the quality is second to none , i was reccommended the BL kit by someone with a lot of knowledge . Dude Link to comment Share on other sites More sharing options...
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