hiflow 1 Posted March 11, 2006 (edited) looking for a picture of the REAL T16 turbo, varible vane type as std fittment on 405 t16 & the engne managment wiring dia (mainly for boost control system). The reason being, i am aware of a few conversion being done & owners experincing misfires above 5500rpm due to malfunctioning boost control or temp sensors. See if i can salvage something of the old system before i store it in the bin ! I can see me just going for 21st century management Edited March 11, 2006 by hiflow Share this post Link to post Share on other sites
Dino 3 Posted March 11, 2006 How about the one on this 306? http://forum.205gtidrivers.com/index.php?showtopic=56153&hl= Share this post Link to post Share on other sites
stew205 17 Posted March 11, 2006 Hi Andy, I have just started work on mine. I have removed the turbo, do you need pics of it fitted? I also labelled the piping for the variable vain and actuator bits before removing, not sure if this is the info you are after? Can't help with the wiring but can sort pics of the above if needed. Thanks Stew Share this post Link to post Share on other sites
cybernck 403 1 Cars Posted March 11, 2006 hi andy, email me and i'll send you some pics and diagrams and i can help with further diagnostics as well. i hope this helps. Share this post Link to post Share on other sites
hiflow 1 Posted March 13, 2006 Dino i cannot see any varible vane turbo . Wonder if that misfires over 5k ? Andy Share this post Link to post Share on other sites
tom_m 0 Posted March 13, 2006 andy, this is the engine in the 306. the actuator numbered 1 is the VAT actuator. the one numbered 2 is the wastegate. Share this post Link to post Share on other sites
PUGA 0 Posted March 13, 2006 Nice to see my pics have come in handy! lol Share this post Link to post Share on other sites
TB_205GTI 1 Posted March 13, 2006 Sadly the 405 wiring diagrams are no longer on infotec - so I can't help with them Furthermore the drawings of the XU10J4TE turbo is really poor - so can't help with that one either. Well can't be of any use actually Share this post Link to post Share on other sites
pdd144c 0 Posted March 14, 2006 andy, this is the engine in the 306. the actuator numbered 1 is the VAT actuator. the one numbered 2 is the wastegate. Surely both of these are commoned up to a point on the inlet? Share this post Link to post Share on other sites
stew205 17 Posted March 14, 2006 Surely both of these are commoned up to a point on the inlet? They each connect to their own electric valve. both these valves have piping to the boost pipe entering the throttle body. Share this post Link to post Share on other sites
pdd144c 0 Posted March 15, 2006 Mmm... I'll have to check mine for the valves then. Not using standard management, got an EFi ecu, but should still be the same. As the turbo boosts up both wastegate and VAT bit parts open up almost together? Surely the VAT part can be setup like any normal actuator, ie. no electronic valve required, jusy adjust the nut? Or am I talking bollocks like usual? Share this post Link to post Share on other sites
cybernck 403 1 Cars Posted March 15, 2006 the VAT is operated with an actuator, that is controlled by an electrovalve. the reason for this is to make the turbine have a smaller A/R for better spool at low revs but higher A/R when it has built up full boost, so you could have it all the way up to high revs. not sure how would it function like without electrovalve though. Share this post Link to post Share on other sites
pdd144c 0 Posted March 15, 2006 (edited) the VAT is operated with an actuator, that is controlled by an electrovalve. the reason for this is to make the turbine have a smaller A/R for better spool at low revs but higher A/R when it has built up full boost, so you could have it all the way up to high revs. not sure how would it function like without electrovalve though. Well if its connected to the inlet as the turbo boosts it will open with no valve present. Electrovalve must either pulse to allow it to open slowly, or act as an on/off switch as such and open it up at a given rpm/boost pressure. I assume! Edited March 15, 2006 by pdd144c Share this post Link to post Share on other sites
les3002 0 Posted March 15, 2006 the electric valves probably act as amal valves, holding the actuators shut till a pre-determined boost level is met then opening them, saves wastegate creep and boost should build quicker lower down. would also probably be used to cut boost if the management detected a problem. Share this post Link to post Share on other sites
cybernck 403 1 Cars Posted March 15, 2006 pdd> i knew you'd say that . without the valve (e.g. boost controller) for the turbo wastegate, connected directly to the inlet, you'd only get ~0.5 bars. now apply the same logic to the VAT actuator . you *could* connect it directly to the inlet manifold without electrovalve bleeding some of the air out and have it operate in relation to boost instead of revs, but it wouldn't be optimal - you'd either have it holding the boost buildup back or you'd have more lag than necessary. either way, i guess you could experiment with it and set it to open when you want (it's about 2200 rpm when ECU-controlled btw). hope this helps . Share this post Link to post Share on other sites
pdd144c 0 Posted March 16, 2006 Haha! Cheers mate. Yeah I guess it does. Be interesting to see how mine works and is wired in. Really need to get the software for my ECU. Share this post Link to post Share on other sites
