Room42 Posted June 30, 2011 Share Posted June 30, 2011 (edited) Although I know the answer more or less, I had a quick look on the site and couldn't find what I was looking for so the query goes thus... Can ya/Who has open/ed your/their stock wastegate actuator, shim/swap the spring and make it work. Cos I'm going to no matter what (almost) anyone says, I'll post results on Saturday afternoon. Ooorah for the forward slash Edit: I should have called it wastegate acutator modification....oh well Edited June 30, 2011 by Room42 Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/ Share on other sites More sharing options...
scotty nm35 Posted June 30, 2011 Share Posted June 30, 2011 I have modded quite a few to hold higher boost, I added a spring to the side to allow easy adjustment/spring replacement. No need to cut the actuator up imo but the M35 design lends itself well to this mod. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5890806 Share on other sites More sharing options...
hypergear Posted June 30, 2011 Share Posted June 30, 2011 ^^^^ Does this thing actually work? How much boost can this hold? I've seen turbos sent in with those setup and I swapped them all with high pressure actautors. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5890905 Share on other sites More sharing options...
Simon-S14 Posted June 30, 2011 Share Posted June 30, 2011 ^^^^ Does this thing actually work? How much boost can this hold? I've seen turbos sent in with those setup and I swapped them all with high pressure actautors. ofcorse it works... its adding preload to the gate via the use of a spring. its crude... but it works Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5890918 Share on other sites More sharing options...
JonnoHR31 Posted June 30, 2011 Share Posted June 30, 2011 yer i did exactly the same thing to my standard actuator years ago. worked well until i got a proper boost controller Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5890928 Share on other sites More sharing options...
hypergear Posted June 30, 2011 Share Posted June 30, 2011 ok. any way, to OP yes we can build you actuators with 2x springs that holds around 18psi depending on the housing, intake and exhaust setup. Or modify your turbine housing to hold what ever boost you want it to hold. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5890929 Share on other sites More sharing options...
scotty nm35 Posted June 30, 2011 Share Posted June 30, 2011 ^^^^ Does this thing actually work? How much boost can this hold? I've seen turbos sent in with those setup and I swapped them all with high pressure actautors. Mine held 17psi, nice and flat. Boost level depends on the size of the puck obviously so the external spring makes changes very easy to fine tune the peak. Crude? I think its a better option than cutting the sealed actuator open as you introduce the chance of leaking which would raise boost. If the spring fails the boost returns to stock levels. If anyone tries this, make sure the spring pulls straight into the actuator or it will put sideways load on the shaft affecting its operation. And make sure you get a tune afterward obviously. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5890999 Share on other sites More sharing options...
Room42 Posted June 30, 2011 Author Share Posted June 30, 2011 Well that all seems good then. I reckon I'll try the outside spring idea first and see how that goes. I bought a Profec A a little while back but it was a bit rooted so the guy refunded me. The button on the front wouldn't pop back in and sometimes it held boost and sometimes it didn't. I might just get a decent boost controller shortly depending on how the actuator modification goes. Thanks for the comments and the pic guys Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5891333 Share on other sites More sharing options...
R31Nismoid Posted July 1, 2011 Share Posted July 1, 2011 just bend the actuator arm you girls Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5891379 Share on other sites More sharing options...
scotty nm35 Posted July 1, 2011 Share Posted July 1, 2011 just bend the actuator arm you girls More preload will only decrease travel causing boost spiking. It wont help much with the puck blowing open as the spring is too soft. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5891439 Share on other sites More sharing options...
Room42 Posted July 1, 2011 Author Share Posted July 1, 2011 Well it was a busy day so all I did was get a spring and put it on a heatshield bolt hole to the wastegate arm. With no boost control its at 8 psi. Thats a whopping 2 psi above stock. Needless to say I wound the bleed valve out a bit to make it more fun. On that subject my bleed valve has started sucking in air a few weeks ago. I'm sure it wasn't before, must be stuffed aye? I've got it t'd into the carbon canister. Any other suggestions/ideas? Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5892586 Share on other sites More sharing options...
jamie curran Posted July 1, 2011 Share Posted July 1, 2011 please someone correct me here if im wrong but cant you adjust the actuator rod? or is that only on R32's? Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5892596 Share on other sites More sharing options...
gotRICE? Posted July 1, 2011 Share Posted July 1, 2011 please someone correct me here if im wrong but cant you adjust the actuator rod? or is that only on R32's? Not stock ones. If its been modded, yes, or aftermarket, yes. But not stock. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5892890 Share on other sites More sharing options...
kwickr33 Posted July 2, 2011 Share Posted July 2, 2011 You can cut it up and use an adjustable extender on it. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5893016 Share on other sites More sharing options...
jamie curran Posted July 2, 2011 Share Posted July 2, 2011 is that whats goin on here? Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5893109 Share on other sites More sharing options...
scotty nm35 Posted July 2, 2011 Share Posted July 2, 2011 By shortening the adjuster you are limiting travel, possibly causing the flap not to open enough and causing boost to spike. It doesn't add that much spring pressure either. There should be around 3mm of preload usually. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5893305 Share on other sites More sharing options...
jamie curran Posted July 2, 2011 Share Posted July 2, 2011 ah ok, well this is the only thing adjusting boost on the car and its running a solid 13psi Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5893392 Share on other sites More sharing options...
Room42 Posted July 8, 2011 Author Share Posted July 8, 2011 Well I cut the spring I had in half and chucked it back on. The car was on 14 psi before and it went up to 18 psi. I adjusted the bleed valve and got it back down to 14 psi again. As to be expected the turbo spools up quicker which is nice for response. I'll chuck the other half on today and see if I can get it to hold 14 psi without the bleed valve. I think it was holding about 9 or 10 psi last time with no bleed valve. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5903957 Share on other sites More sharing options...
Beer Baron Posted July 8, 2011 Share Posted July 8, 2011 yeah I like scottys idea with the spring on a bracket. simple and should work very well. easy to get different rate springs to suit different needs. good one. Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5904010 Share on other sites More sharing options...
blk94r33 Posted July 8, 2011 Share Posted July 8, 2011 Out of curiosity, has anyone had problems with the heat from the exhaust are affecting the effective spring rate? Ie higher boost at lower temps, vice versa? Link to comment https://www.sau.com.au/forums/topic/369564-wastegate-modification/#findComment-5904029 Share on other sites More sharing options...
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