do1fox Posted January 24, 2014 Share Posted January 24, 2014 Hello everybody, I want to ask for help, or Information for the Twin Turbo operation. I konw a lot of infomration about the stock Twin Turbo setup. thats not a problem. But I have read somewhere about to swap to a parallel setup. So now VoD. I don't find this information anymore. Some of you have infos? I read some posts that some hat done this. I doesn't mean an swap to Single (like TD04) Turbo ! best regarts Stefan Link to comment Share on other sites More sharing options...
monkeyposeur Posted January 24, 2014 Share Posted January 24, 2014 Have you asked this on uklegacy.com? There are only a handful of twin turbo Legacies in this country. Link to comment Share on other sites More sharing options...
Zues Marine Posted January 25, 2014 Share Posted January 25, 2014 Reuben has done it... here: http://legacygt.com/forums/showthread.php/reubens-engine-transplant-single-turbo-conversion-81464.html?t=81464 Link to comment Share on other sites More sharing options...
monkeyposeur Posted January 25, 2014 Share Posted January 25, 2014 I doesn't mean an swap to Single (like TD04) Turbo ! Zues, that's not what he is asking. But I have no idea what he means by a parallel setup. Link to comment Share on other sites More sharing options...
Zues Marine Posted January 25, 2014 Share Posted January 25, 2014 oh, well thats what i get for not reading the post, hah Link to comment Share on other sites More sharing options...
mailman Posted January 25, 2014 Share Posted January 25, 2014 Zues, that's not what he is asking. But I have no idea what he means by a parallel setup. In the subaru motor, one turbo starts and then the second turbo takes over at a certain point. It's a sequential system. He wants to make it so that both turbos operate at the same time, maybe one turbo per head. Seems like a cool but complicated project. Link to comment Share on other sites More sharing options...
monkeyposeur Posted January 25, 2014 Share Posted January 25, 2014 That's what I was thinking but wtf? Link to comment Share on other sites More sharing options...
hansvonaxion Posted January 25, 2014 Share Posted January 25, 2014 In the subaru motor, one turbo starts and then the second turbo takes over at a certain point. It's a sequential system. He wants to make it so that both turbos operate at the same time, maybe one turbo per head. Seems like a cool but complicated project. Can be very simple. I believe the simplest way is a plate to block the cross pipe between each side of the exhaust. Link to comment Share on other sites More sharing options...
do1fox Posted January 28, 2014 Author Share Posted January 28, 2014 Ok guys, Thanks a lot for these answers Yes its a sequential system, and i have read some Informations that i can be used as a parallel system. I also have seen some cars ion the Internet. But no HowTo. I will ask in the Uk Forum Thanks a lot Link to comment Share on other sites More sharing options...
hansvonaxion Posted January 29, 2014 Share Posted January 29, 2014 Here's one DIY way, just messing with the vacuum pipes... Link Google translate Link original Japanese This is the CTS kit that uses a metal plate to block the cross pipe and some tweaking of the vacuum pipes.... http://cdn.mkimg.carview.co.jp/carlife/images/UserCarPat/1425426/p1.jpg?ct=399ec3b6803e Link to comment Share on other sites More sharing options...
do1fox Posted January 29, 2014 Author Share Posted January 29, 2014 Hi, Thank you very much. NowI only whats your opinion it is better or not? is there a dyno ? Link to comment Share on other sites More sharing options...
twisty Posted January 30, 2014 Share Posted January 30, 2014 wouldnt running two parallel turbos that equal 10-12 psi be about the same power output as one turbo at the same psi? what benefit would having a second turbo at the same time offer? is more air pressure the only gain? i guess if you could use two smaller turbos youd have power sooner, mebbe. Link to comment Share on other sites More sharing options...
DOHCstunr Posted January 30, 2014 Share Posted January 30, 2014 Boost doesn't make power. Airflow makes power. A more efficient flowing turbo can potentially make more power at less boost than a less efficient flowing turbo. Link to comment Share on other sites More sharing options...
twisty Posted January 30, 2014 Share Posted January 30, 2014 so 2 parallel turbos on 3" intake lines with a regulator limiting the system to 6psi incoming will create more air flow than one turbo on a 3" line that is also limited to 6psi incoming? sounds like 6 of one, half dozen of the other to me... what is the cfm of a standard turbo at 6psi on a 3" line compared to a 4" line? serious question, i can relate it to dissolved o2 systems that i program, but the small runs and exhaust driven turbos are the data i dont have answers for Link to comment Share on other sites More sharing options...
hansvonaxion Posted January 30, 2014 Share Posted January 30, 2014 Just to be clear, the sequential system runs the primary only, then both primary and secondary together. When it switches from primary only to both there is a moment where it bypasses the primary and runs only the secondary, that causes the VOD. do1fox, I've never driven or been in a car that has been converted, never seen a dyno either, just heard reports, which were mixed. I would guess it depends on how you go about it too, the Syms manifold would give best results I would imagine but it's a lot of money for something you might not like. Do it the cheap and easy way and your probably guaranteed to not like it. Link to comment Share on other sites More sharing options...
do1fox Posted January 31, 2014 Author Share Posted January 31, 2014 @hansvonaxion: Thank you: So without Syms, i don't try it. No it is also mapped and I am happy. When the conversion is much better, and i want to see a dyno, then it is a good reason but so... Link to comment Share on other sites More sharing options...
spooln30 Posted February 1, 2014 Share Posted February 1, 2014 Guys with Supras and stock twins do this all of the time and its does wonders on the 2jz. They actually will install a solenoid with switch so they can go either way. I did this mod on my Supra when I still ran the stock twin turbos and I loved it. Link to comment Share on other sites More sharing options...
TexasLegacy2.5GT Posted February 3, 2014 Share Posted February 3, 2014 Spoolin' I actually own a 99' Legacy 2.5GT and a 98' SC300 with the 2Jz GE. I've always imagine what the 2Jz-GTE with the R154 feels like.. Link to comment Share on other sites More sharing options...
spooln30 Posted February 5, 2014 Share Posted February 5, 2014 I'm sure you know but the MK4 Supras V160 and V161 are far superior transmissions. I own a MK3 Supra with a 2jzgte.R154. The R154 can handle big power and last a long time if it's built right and with the right parts. Mine has every Marlin Crawler upgraded part they sell and she's been handling 730whp for years now. Even before I rebuilt the trans with all of the goodies it still took the power well. Marlin Crawler is a shop that specializes in Toyota manual transmissions for rock crawling. Stout stuff. You can swap in a R154 into your SC pretty easy. Just need the extension shifter among a few other parts. What do you have now the W58? Link to comment Share on other sites More sharing options...
dizzydice169 Posted February 7, 2014 Share Posted February 7, 2014 Anyone used a zerosports sequential controller to try and help with vod? Link to comment Share on other sites More sharing options...
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