mellonman Posted April 17, 2009 Share Posted April 17, 2009 can you upgrade the stock turbos NOT HYBRID! but actually put a better set of turbos on keeping the sequential system and manifold. NOT A SET OF UK TURBOS which would still have older technology dont realy want to go single and turbos may be on the way out just seeing what options i have ahead. Quote Link to comment Share on other sites More sharing options...
tony tt Posted April 17, 2009 Share Posted April 17, 2009 I think its either replace the turbos stock for stock or the only other option is hybrids. Why not hybrids? Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 17, 2009 Author Share Posted April 17, 2009 i just hear so many bad things about them saying there not worth it. so going to toyota for a new set of turbos is the way forward for a new turbos Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted April 17, 2009 Share Posted April 17, 2009 i just hear so many bad things about them saying there not worth it. so going to toyota for a new set of turbos is the way forward for a new turbos dont rule out hybrids if you want more power, just find someone who knows how to build them....for ultra reliability though get new stockers and keep it BPU Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 17, 2009 Author Share Posted April 17, 2009 so theres not another bolt on turbo that would fit the supra twin turbo set up.sounds like there would be a market for that? i do have a set of the stock twins in my shed but first turbo has hair line crack in the turbine housing dont know if anything can be done to repair or not? Quote Link to comment Share on other sites More sharing options...
themodifiedkid Posted April 17, 2009 Share Posted April 17, 2009 Your right there, I would imagine there would be a good market for this, I would def consider it if such a product existed As for the hairline crack im not really to sure, obviously could'nt be used with the crack but don't no what could be relible enough to seal it tho. Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 17, 2009 Author Share Posted April 17, 2009 well i was thinking of the lines of grinding and welding it but not sure of reliabilaty no piont doing the hybrid on a knackerd turbo. that is how i come to start this thread hopefully will discover a turbo source or some very good information as always on this site Quote Link to comment Share on other sites More sharing options...
Homer Posted April 17, 2009 Share Posted April 17, 2009 There's no off the shelf kit I'm aware of thats available now, however there are some options available to replace the turbo's themselves. It's not been done here to my knowledge, but there are one or two cars in the US that use a pair of small garrett turbo's in place of the stockers. Not an easy or cheap job to do, I expect it'd be more cost effective (and better bang for buck) going for a single conversion. Everything would need to be replaced anyway (injectors, ECU, half the turbo system, wastegate, the list goes on) Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 17, 2009 Author Share Posted April 17, 2009 yeah i was expecting alot to be changed.ecu injectors. i just didnt want to lose the drivablity of the sequenctial set up being a auto as well not looking for massive power top end. realy just a better turbo than toyottas at proberly the same price. Quote Link to comment Share on other sites More sharing options...
colsoop Posted April 18, 2009 Share Posted April 18, 2009 There is a big thread on Supraforums about upgrade turbos using the stock seq system. Its available for us spec supras. I don't think its a straight swap but could be an avenue to explore (take hp figures with a big pinch of salt) : https://www.speedforsale.com/supraparts/speed-sale-usdm-gt28-hybrid-stock-twin-turbo-upgrade-550rwhp-p-553.html?osCsid=qeah1raphu7gglorqpa8j3rt63 Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 20, 2009 Share Posted April 20, 2009 That kit looks intresting - not sure about the HP figures but maybe possible with supporting mods such as high lift cams, larger injectors proper fueling etc - Shipping to the UK will be expensive though. Quote Link to comment Share on other sites More sharing options...
jacko Posted April 20, 2009 Share Posted April 20, 2009 same as these on ebay http://cgi.ebay.com/ebaymotors/SpeedForSale-MK4-Supra-GT28-Hybrid-Stock-Twin-Turbo-Kit_W0QQcmdZViewItemQQ_trksidZp3286Q2em63Q2el1177QQhashZitem180320707281QQitemZ180320707281QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 20, 2009 Share Posted April 20, 2009 Another thing i thought the stock sequential pipes were too restrictive for any Big bhp?? Quote Link to comment Share on other sites More sharing options...
Jellybean Posted April 20, 2009 Share Posted April 20, 2009 What about these guys, would they be a good option http://www.turbotechnics.com/docs/index.htm (Variable Vein Technology)OR http://www.turbodynamics.co.uk/ Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 20, 2009 Author Share Posted April 20, 2009 still doesnt look like theres a straight bolt on. would a new set from toyota have roller bearings ect or still have the older technology? Quote Link to comment Share on other sites More sharing options...
Jellybean Posted April 21, 2009 Share Posted April 21, 2009 Sorry to hiJack, but if Mellonman went for Hybrids do you need to remap or is it just a straight mechanical bolt on Plus why are hybrids taught to be unreliable? Quote Link to comment Share on other sites More sharing options...
legendswraith Posted April 21, 2009 Share Posted April 21, 2009 Depends on what levels of boost they are going to run. If it was looking at about 1.4 to 1.5 bar on hybrids then yes you would need the injectors replacing with larger cc/min and the fuel map/ ignition maps changing. I suppose hybrid turbo's are frowned on due to the quality of work etc that can go into them depending on who is doing them, plus the cost of having someone reputable hybridise stockers is roughly £700 per turbo. For that price you would get the steel turbine set up from the USDM/Euro and possibly a slightly bigger compressor (correct me if i am wrong). I originally looked into seeing if i could use the GT2860 CHRA and basically rebuilding the stock system on top of it, but its proved to be a logistical nightmare. So as yet i have not found anything that will basically slot into the gap left by removing the stock CHRAs. Stock turbos would also be normal journals and not ball bearing. Its not actually that hard to strip and rebuild the stock turbos, but on rebuild it will require balancing which will be the stumbling block for virtually everyone unless you are fortunate enough to have access to a balancing machine Quote Link to comment Share on other sites More sharing options...
Pixelfill Posted April 21, 2009 Share Posted April 21, 2009 anyone know approximately how much a brand new pair of JSpec tubbies is likely to set me back ? Mike Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 22, 2009 Share Posted April 22, 2009 speak to nic Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted April 22, 2009 Share Posted April 22, 2009 roughtly 2-3k Quote Link to comment Share on other sites More sharing options...
2JG Posted April 22, 2009 Share Posted April 22, 2009 (edited) The price I got from Nic before christmas was around £1350 each including shipping/postage for a new set of J-spec tubbies. Edited April 22, 2009 by 2JG spelling (see edit history) Quote Link to comment Share on other sites More sharing options...
legendswraith Posted April 22, 2009 Share Posted April 22, 2009 anyone know approximately how much a brand new pair of JSpec tubbies is likely to set me back ? Mike If there is nothing wrong with the housings do you really need a new set the wear will all be in the journals, bearings and shafts. Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 22, 2009 Share Posted April 22, 2009 The price I got from Nic before christmas was around £1350 each including shipping/postage for a new set of J-spec tubbies. Anyone know how much it is for the stronger UK spec ones? Quote Link to comment Share on other sites More sharing options...
Frank Bullitt Posted April 22, 2009 Share Posted April 22, 2009 Try your local Toyota dealership or Nic again. Quote Link to comment Share on other sites More sharing options...
Dnk Posted April 22, 2009 Share Posted April 22, 2009 We could do with poll from hybrid users to see what kind of mileage theyve done, my uks have done 126k with no problem so i'd replace with new uk specs unless theres a hybrid out there thats done some decent miles. Quote Link to comment Share on other sites More sharing options...
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