5e colin Posted May 6, 2015 Share Posted May 6, 2015 hey lads need some info on controlling 2 turbos with 1 external waste gate any 1 can link me to a setup cheeeeers Quote Link to post Share on other sites
turbo Grant Posted May 6, 2015 Share Posted May 6, 2015 (edited) Sounds fun Edited May 6, 2015 by turbo Grant Quote Link to post Share on other sites
_shaun_ Posted May 6, 2015 Share Posted May 6, 2015 really need 2 to be honest with one wastegate you run a very likely risk of just overspooling one turbo and being left with a lazy one Quote Link to post Share on other sites
daniel_g Posted May 6, 2015 Share Posted May 6, 2015 If you were doing 1 it surely would have to be a 60mm to be able to cope properly, even if it is only 2 CT9s.Personally id be using 2 38mm, twin screamers haha Quote Link to post Share on other sites
mikey4410 Posted May 6, 2015 Share Posted May 6, 2015 christ colin ure a mad man.but good luck :-D Quote Link to post Share on other sites
Flaminsam Posted May 6, 2015 Share Posted May 6, 2015 Are you compound charging? If so big turbo feeding smaller turbo ;) how are the turbo turbines set up? Is it one exhaust housing feeding another or are you running twin down pipes with independent feeds from the manifold? Quote Link to post Share on other sites
5e colin Posted May 6, 2015 Author Share Posted May 6, 2015 flaming sam 2x ct9s it works BUT on low rpm nr2 is stalling the other 1 if you get me the 1 on the stock mani spools like stock , spooling the other 1 but nr1 is producing more boost before nr2 so the pressure feeding in nr1 from nr2 is lower so stals again because nr1 feed is to hard for nr2 feed to feed in to so also stalling nr1 again ( at lower rpm ) under 3500rpm but higher up the revs they work in sinq and go like stink like a tdo5 ( can compare my old 5e tdo5 ) 3rd and 4th gears bounce of the limiter in seconds :) but undriveable under it ( shit boooost ) this is a ct9a ( block side and a ct9b ( rad sid ) on stock actuators with 1 nipple venting to air so 11/12 psi each ? for the guys that didnt see my thread ??? here she is i want to get this to work properly guys because i think it will beat a tdo4 :) atleast thats what it feels like so much torque , and im not on about the forged boys you guys are in a different league altogether !!! mikey it runs in my blood ha ha Quote Link to post Share on other sites
RobSR Posted May 6, 2015 Share Posted May 6, 2015 If you did run a massive gate to compensate you'd be getting boost spikes all over the place aswell, and it'll make solid boost control a pig. Run two smaller gates like mentioned. Quote Link to post Share on other sites
_shaun_ Posted May 6, 2015 Share Posted May 6, 2015 so is the down pipe from turbo one fed into turbo 2 then? i Quote Link to post Share on other sites
5e colin Posted May 7, 2015 Author Share Posted May 7, 2015 yes shaun full flow from nr1 exhaust side , feeds nr2 they both get the same 1300cc of hot air flow pitty it wont work with 1 gate going to be a while before i have 2 ha ha might aswell change the boost side feed to then feed 1 tru the other on the compressor side it wont be able to stall then ?? i think ?? Quote Link to post Share on other sites
Flaminsam Posted May 7, 2015 Share Posted May 7, 2015 Now I've seen it Colin I understand how it's set up. Due to the first turbo getting the exhaust gasses first it is causing the second turbo to surge. You may be better off feeding the two turbo's from two runners each. A bit like how a rb26 runs two t28's. So turbo 1 on cylinder 1/2 and turbo 2 off 3/4? That way equal amounts of air will be flowed to both turbines. Failing that I don't see how you will get the turbos to spool up together? Failing that you can do the same on the inlet sides of the turbo, so the outlet of turbo 1 feeds turbo 2 inlet then turbo 2 outlet feeds the intercooler/engine? That way they won't be fighting each other 😉 Quote Link to post Share on other sites
5e colin Posted May 7, 2015 Author Share Posted May 7, 2015 2 cylinders for 1 turbo is out of the question it will be laggy then like a tdo4 the way it is now i get full pelt x2 when stock turbo kicks in thats the plan ha ha almost there Quote Link to post Share on other sites
Flaminsam Posted May 7, 2015 Share Posted May 7, 2015 (edited) Try compound charging the two inlet sides then possibly? They won't fight each other then 👍🏻 Edited May 7, 2015 by Flaminsam Quote Link to post Share on other sites
_shaun_ Posted May 7, 2015 Share Posted May 7, 2015 controlling the set up that way would be extremely hard one is always going to be working more than the other but to stop them fighting each other best fix would be 2 1 way valves Quote Link to post Share on other sites
5e colin Posted May 7, 2015 Author Share Posted May 7, 2015 (edited) Try compound charging the two inlet sides then possibly? They won't fight each other then ya exhaust feeds exhaust intake of nr2 on this to like mine i just have to change my setup on the intake like this then is nr 2 controlling al the boost looks like it to me ??? i WOULD LOVE to see the other side how the boost is controlled on them 2 ha ha Edited May 7, 2015 by 5e colin Quote Link to post Share on other sites
daniel_g Posted May 7, 2015 Share Posted May 7, 2015 Whilst we're on the subject of mad turbo setups, has anyone seen the bmw tri turbo setup? It looks mental haha. Quote Link to post Share on other sites
5e colin Posted May 7, 2015 Author Share Posted May 7, 2015 Whilst we're on the subject of mad turbo setups, has anyone seen the bmw tri turbo setup? It looks mental haha. dont get me going ha ha we need pics pics and more pics back on topic i still have room to the left for a 3rd 1 ha ha Quote Link to post Share on other sites
karl. Posted May 7, 2015 Share Posted May 7, 2015 Colin the above setup would be great if you had one small and one big turbo but I don't think it would be worth it when you have two very small turbos. As mentioned the 1 way valves would be the best shout. Quote Link to post Share on other sites
5e colin Posted May 7, 2015 Author Share Posted May 7, 2015 carl them 1 way valves are chinese to me never seen setups like that ? how are they controlled ?? it al has to be manual because i run stock ecu !!!! pics i learn a lot from im oldschoool ha ha Quote Link to post Share on other sites
karl. Posted May 7, 2015 Share Posted May 7, 2015 I dont know of any in a turbo setup but basically a flap that would open under positive pressure from the turbo and close otherwise. Meaning one turbo would not be able to stall the other? Quote Link to post Share on other sites
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