rvandivort Posted December 10, 2007 Share Posted December 10, 2007 Hi! Wondering how you run a manual boost off this. Or megasquirt? Thanks, Roger. Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted December 10, 2007 Share Posted December 10, 2007 Your going to have to do better than that if you want a meaningful answer... Please expand more on what exactly you have, and what you want to do with it. Quote Link to comment Share on other sites More sharing options...
gearheadstik Posted December 10, 2007 Share Posted December 10, 2007 One line to Comp housing and one to actuator.... Same as above, Be a little more specific Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 11, 2007 Author Share Posted December 11, 2007 Ok--thanks for the quick response! As I understand it, from previous threads one vacuum line goes to the comp housing(as I can tell from looking at the Holset in front of me with original actuator) the other to the intake manifold. So, how does a manual boost work on this setup---or not? Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 11, 2007 Author Share Posted December 11, 2007 Or,is there any benefit from the two vacuum inputs. Would make things easier from a manual boost control standpoint. Just plug one of them--and move on. Or get a single input ?! Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 11, 2007 Author Share Posted December 11, 2007 And I Hate being called a "junior member". I`m pushing 60 and bought And I Hate being called a "junior Member". I bought My 280z 2+2 in 76--My ex wife got the 68 Mustang that year--welcome to it-no loss from my side. Quote Link to comment Share on other sites More sharing options...
gearheadstik Posted December 12, 2007 Share Posted December 12, 2007 Just use one the you can blow into to open the actuator... and the boost controller goes in between the comp housing and actuator....not the intake manifold...It limits how much boost it takes to open the wg by spring pressure. Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 12, 2007 Author Share Posted December 12, 2007 Hey, Thanks Gearheadstik! So no manifold input at all! I`m thinking "LIKE DUH!! But, why the two inputs in the first place? Why not just one and be done with it. This would imply either two manual boostcontrollers, or a dual entry boost contoller....or none at all! Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 12, 2007 Author Share Posted December 12, 2007 And,I read on a previous thread where pressure on both sides was a good thing. That`s where I got confused. Well, bad information! Quote Link to comment Share on other sites More sharing options...
gearheadstik Posted December 12, 2007 Share Posted December 12, 2007 I'm not sure why they have 2 ports, but I use the same thing with a AEM tru-boost controller and it works great...read up on boring out the wg hole if you have not already done it... It will help big time.. Search boost creep. Quote Link to comment Share on other sites More sharing options...
datman Posted December 14, 2007 Share Posted December 14, 2007 when connected to a boost controller the 2nd port lets air pressure push against the diaphragm in the opposite direction to the first port. this lets you run higher boost pressures and helps keep boost pressure stable. Quote Link to comment Share on other sites More sharing options...
Slow_Old_Car Posted December 14, 2007 Share Posted December 14, 2007 save yourself alot of headache, have the internal gate welded shut and convert to external wastegating. MUCH more stable than trying to get a turbo that was designed to operate at 30psi to puts along at 10psi on the stock actuator. Quote Link to comment Share on other sites More sharing options...
gearheadstik Posted December 14, 2007 Share Posted December 14, 2007 save yourself alot of headache, have the internal gate welded shut and convert to external wastegating. MUCH more stable than trying to get a turbo that was designed to operate at 30psi to puts along at 10psi on the stock actuator. I have not had any problems with mine running up to 20psi or so, I would think I helped most at very high boost, How does the external help besides being able to dump more exhaust quicker? Quote Link to comment Share on other sites More sharing options...
Slow_Old_Car Posted December 14, 2007 Share Posted December 14, 2007 I have not had any problems with mine running up to 20psi or so, I would think I helped most at very high boost, How does the external help besides being able to dump more exhaust quicker? The amount of porting i have seen done, which took it to the very limits of the puck itself, still produced a turbo which would spike/creep in higher RPM's. Granted i've never used one with a dual reference actuator which might have a greater travel capability than the stock units i've seen fanagled into there uses. The way i've come to look at it is much along the same lines of people who will choose to retap there turbos center sections for standard size threads. You can take a part, and modify and modify and modify till maybe it will work on the intended task. Or you can get the right part for the job the 1st time around and save yourself some busted knuckles, wasted gaskets, and half a bottle of asprin. I've done the holset setup both ways, i even got pretty darn good at modulating the boost with just throttle control, but of all the methods i have tried or seen tried. The simplest, and most effective, was going external. Not to mention, it's a part that will grow with your car, so if you change turbo's down the line your already set. my .02. Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 15, 2007 Author Share Posted December 15, 2007 Hi Guys!, I found the answer in Thumpers thread "Any ideas on how to manage boost creep"--complete with diagram on pg. 2. Thanks for your help and interest,Roger Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 15, 2007 Author Share Posted December 15, 2007 And the internal VS external wastegate controversy continues! Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 15, 2007 Author Share Posted December 15, 2007 Hey slow old car! the center tap thing got me wondering(has nothing to with the nonexistent problem). You can get adapters (metric to nps,bps) to take care of the oil feed problem. My only problem now is the oil discharge side. Who makes those things? for the holset Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 15, 2007 Author Share Posted December 15, 2007 from autometer Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 15, 2007 Author Share Posted December 15, 2007 Autometer can take of the input. Which company can take care of the output===of the oil--adapter? Quote Link to comment Share on other sites More sharing options...
rvandivort Posted December 15, 2007 Author Share Posted December 15, 2007 For a holset--seen them for garretts Quote Link to comment Share on other sites More sharing options...
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