HadeS Posted January 29, 2012 Share Posted January 29, 2012 I have an idea of making a turbo setup but never seen it before. Any informations will be welcome. http://img24.imageshack.us/img24/7317/twinsetup.jpg What your thoughts? Quote Link to comment Share on other sites More sharing options...
Wez Posted January 29, 2012 Share Posted January 29, 2012 Its called compound charging and has been done before From memory its even been done on MKIV, check out supraforums. Quote Link to comment Share on other sites More sharing options...
Wez Posted January 29, 2012 Share Posted January 29, 2012 I see your design is slightly different, ie your using the exhaust gases instead of the charge air, but the theory of using a smaller turbo to get a larger turbo spinning is the same. If you google compound charging there is lots of info available including the following article :- http://www.motorsport-developments.co.uk/tech_articles/FAF307.tech.pdf Quote Link to comment Share on other sites More sharing options...
Steve Posted January 29, 2012 Share Posted January 29, 2012 Boostlogic make a kit IIRC Quote Link to comment Share on other sites More sharing options...
Wez Posted January 29, 2012 Share Posted January 29, 2012 Boostlogic make a kit IIRC Ahh yes 42Xa1HO1IwI Quote Link to comment Share on other sites More sharing options...
Steve Posted January 29, 2012 Share Posted January 29, 2012 http://www.boostlogic.com/catalog/p140838/Boost-Logic-Supra-TT-Compound-Turbo-Kit-Toyota-Supra-93-02-/product_info.html Quote Link to comment Share on other sites More sharing options...
Wez Posted January 29, 2012 Share Posted January 29, 2012 http://vrechise.com/getimage.php?i=SKU160.jpg Quote Link to comment Share on other sites More sharing options...
johnny g Posted January 29, 2012 Share Posted January 29, 2012 http://vrechise.com/getimage.php?i=SKU160.jpg If I'd not got Twins, then I'd have done this - it's epic. Quote Link to comment Share on other sites More sharing options...
HadeS Posted January 29, 2012 Author Share Posted January 29, 2012 Well, I got my 1JZGTE and 2JZ bottom, so 1.5JZ but I will need more air so was thinking about this. CT12a should give possitive boost at 2300. If my project will go through I'll uplode some pics Quote Link to comment Share on other sites More sharing options...
tbourner Posted January 30, 2012 Share Posted January 30, 2012 OP pic isn't compound charging though is it, the exhaust from 1st to second turbo won't be charged, in fact it'll be low pressure as all the power will be used to spin up T1. Plus it'll be hot, wouldn't like to think what EGTs might be! Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted January 30, 2012 Share Posted January 30, 2012 Why not just have a pair of 3 cylinder manifolds, smaller turbo on 1, larger on the other, no linking of pipework? Quote Link to comment Share on other sites More sharing options...
David P Posted January 30, 2012 Share Posted January 30, 2012 Here's some snaps. Quote Link to comment Share on other sites More sharing options...
garethr Posted January 30, 2012 Share Posted January 30, 2012 (edited) I can see the point of the compound system, and I can understand the reasons for a Mk4 Supra type sequential system where the second turbo is bigger than the first turbo, but the 1JZ has parallel turbos, and, other than a compound system, I don't see how two different sized turbos could work. Edited January 30, 2012 by garethr (see edit history) Quote Link to comment Share on other sites More sharing options...
tbourner Posted January 30, 2012 Share Posted January 30, 2012 I can understand the reasons for a Mk4 Supra type sequential system where the second turbo is bigger than the first turbo It's not, the sequential system wouldn't work if the turbos were different sizes. Quote Link to comment Share on other sites More sharing options...
CanisLupus Posted January 30, 2012 Share Posted January 30, 2012 I can't see that system working efficiently if the turbos are just fed by either three cylinders. In compound charging you have to feed both turbos with all six cylinders as shown in the pictures few posts above. Quote Link to comment Share on other sites More sharing options...
HadeS Posted January 30, 2012 Author Share Posted January 30, 2012 My thought was that the down pipe of the small turbo is feeding the bigger one, so you end up with small turbo (feed by 3 cylinders only) working from the low rews and bigger (feed by 6 cilinders) working above smaller rev range. Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 30, 2012 Share Posted January 30, 2012 Compound system never seemed to take off, not sure why tbh. Or how about? Quote Link to comment Share on other sites More sharing options...
HadeS Posted January 30, 2012 Author Share Posted January 30, 2012 :o Quote Link to comment Share on other sites More sharing options...
buster Posted January 30, 2012 Share Posted January 30, 2012 That looks awsome put me down for one of them Quote Link to comment Share on other sites More sharing options...
garethr Posted January 30, 2012 Share Posted January 30, 2012 I can see the point of the compound system, and I can understand the reasons for a Mk4 Supra type sequential system where the second turbo is bigger than the first turbo, but the 1JZ has parallel turbos, and, other than a compound system, I don't see how two different sized turbos could work. It's not, the sequential system wouldn't work if the turbos were different sizes. I know (but I didn't express myself as clearly as I might have). I meant a sequential system, like the Mk4, but with the difference that the second turbo is larger. Quote Link to comment Share on other sites More sharing options...
David P Posted January 30, 2012 Share Posted January 30, 2012 I know (but I didn't express myself as clearly as I might have). I meant a sequential system, like the Mk4, but with the difference that the second turbo is larger. Here's some snaps. http://www.mkivsupra.net/vbb/attachment.php?attachmentid=145314&d=1327920130 http://www.mkivsupra.net/vbb/attachment.php?attachmentid=145315&d=1327920130 Quote Link to comment Share on other sites More sharing options...
johnny g Posted January 30, 2012 Share Posted January 30, 2012 I know (but I didn't express myself as clearly as I might have). I meant a sequential system, like the Mk4, but with the difference that the second turbo is larger. Like BMW use on the x35d engines? One small turbo, one larger turbo. Quote Link to comment Share on other sites More sharing options...
tbourner Posted January 31, 2012 Share Posted January 31, 2012 I know (but I didn't express myself as clearly as I might have). I meant a sequential system, like the Mk4, but with the difference that the second turbo is larger. I wonder what you'd have to do to make that work. Probably too much for it to work with a slightly larger turbo, would be best to have a big single in place of the 2nd turbo, and remove all the bypass stuff linking them, so 1st turbo spools up as normal, bypasses at 2.5k to get the big single spooling then by 3.5k the 1st turbo can give up and all EGs go through the single. Bit of a hefty job though I'd imagine. Quote Link to comment Share on other sites More sharing options...
mellonman Posted January 31, 2012 Share Posted January 31, 2012 Compound system never seemed to take off, not sure why tbh. Or how about? http://www.mkivsupra.net/vbb/attachment.php?attachmentid=145326&stc=1&d=1327947139 is that not 2 x 2jzgte or am i completely loosing it? any chance you can put a link up for that thread please i want to see how that works Quote Link to comment Share on other sites More sharing options...
Nic Posted January 31, 2012 Share Posted January 31, 2012 is that not 2 x 2jzgte or am i completely loosing it? any chance you can put a link up for that thread please i want to see how that works http://www.freakingnews.com/pictures/82000/Olsen-twins--82126.JPG Quote Link to comment Share on other sites More sharing options...
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