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Looking for a STRONG Internal Wastegate Actuator?

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I built one of these for a completely stock/unported 14b I have bolted to my 2g. Actuator came from a HX35, so I'm told. Hits and holds 19psi with no boost controller of any kind installed. Excellent idea!!
 
Sorta old thread but figured id add my input in relation to the ebay actuators. My initial E316g actuator ended up leaking due to a bad diaphragm. I put a spare on it only to find the canister cracked a few days later. So while looking ebay i found the above mentioned 22psi actuator. I thought yeah right. So i snagged one and it was here in a few days.

First test was to see if it actually held closed until 22psi, sure enough it did. Tossed it on the car back the MBC all the way out and Its holding roughly 21psi out the top. With cams etc etc. Pretty impressed so far. We will see how long it lasts. I did have to tweak the boost port to clear my FP intake setup though.
 
Hey i just picked up a car with one of your modified wastegates on it. What im wondering though, is what all springs do these come with? I've heard anywhere from 15-20psi so far.
 
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Not that I know of. They appear to be fine in the ad but they're not adjustable compared to the ones I build....plus Holset actuators last years and hundreds of thousands of miles on their OEM applications- not too sure about those aftermarket eBay specials. ;)

Will let you know on this..I bet the ebay will not hold as well as it should..But we'll see..
 
what all springs do these come? I've heard anywhere from 15-20psi so far.
1-bar (14.5psi) to 23psi, according to Holset....but spring tension and actual physical holding power are to different things. A 23psi actuator with a well-ported housing and giant wastegate flapper may only hold 15psi as a baseline.

Actuators are built according to the customer's specifications so you could have any of them, really.
 
1-bar (14.5psi) to 23psi, according to Holset....but spring tension and actual physical holding power are to different things. A 23psi actuator with a well-ported housing and giant wastegate flapper may only hold 15psi as a baseline.

Actuators are built according to the customer's specifications so you could have any of them, really.

Thats what i was worried about. I shouldn't have to worry about it creeping anymore, but im worried about what its running on wg pressure. Stock injectors, stock tune.

Thanks for the info
 
I'd like to share some feedback with Justin's Holset actuator with everyone.

My car is an Evo 1, very similar to a 2g DSM but with the better intake manifold (Evo 1-3 intake manifolds are the same performance-wise)

My setup is:

-Stock longblock
-Forced Performance Race cast exhaust manifold
-FP68HTA with 7cm housing and 34mm wastegate flapper
-2.5" A'Pexi N1 downpipe, high-flow cat, 3" A'Pexi N1 catback
-ARC intercooler and 2.5" piping
-660cc injectors, stock MAF

On the wastegate only, boost is around 16 psi.

With my Blitz SBC i-D boost controller turned up, it holds 22 psi to redline. The "gain" setting (setting spool) is supposed to be between 5-15 on the Blitz SBC; with this wastegate, I can crank it all the way up to 100 and get a 1 psi spike at most - boost holds very steady all the way up. No spikes, no creeping, very cool. My boost setting is only 65% of duty cycle, so it's possible that this wastegate will hold 25 psi and beyond, on a TD05H-based turbo. Not bad.

Short version: awesome upgrade if you want to run a TD05H up in boost, don't want an external gate, and don't like spikes or creeping.
 
i just made one of these too actually for my 16g. My concern is that the throw of the modified holset/MHI. When i put 20 pounds of pressure to it, the flapper barley moves. So when i bump it up to 25 pounds of compressed air, the flapper moves roughly 1/4". And when i put 30 pounds i get about an inch of movement. I wanted to run 25 ish pounds of boost. Will that 1/4" of movement on the flapper be enough?
 
If the flapper opens at all, it will control boost....don't worry about that. I just worked on a car the other week that had the actuator head smashed in a little and the flapper was hung open about 1/16"...and it wasn't making full boost until almost 5K with a 16G.

The flapper will never open fully during operation- maybe if you have an initial spike of 30psi or so, but the wastegate must slowly close as you approach redline, especially on a smaller turbo....or the boost level will tank.
 
I'm glad a saw this thread, I have the HTA68 internal gated. It wouldn't hold at higher than 22 psi, I'd like to run in the 28~30+psi. This mod definitely fits the bill, I don't want to go external. Thanks JusMX141!!!
I look on eBay for holset hx35 actuator, and came across one that say " cummin holset hx35w wastegate actuator". It had a pressure adjusted between 5-23psi and arm length adjusted between 6"-7"Is this the same as the hx35? Sorry I don't know anything about holset turbo. Also there's one with arm length adjusted 7"-8". Which length would be more ideal for this mod or is it irrelevant?
Thanks
 
I have no clue what pressure that actuator would be. It's highly-possible you could be wasting your efforts if the pressure can't hold enough based on their description of "5-23psi". Sounds no stronger than the stock actuator...perhaps even weaker.
 
For people on e85 or racegas wanting to get the absolute highest boost possible on a mitsu turbo, without going external, or evenb modding the stock wastegate. T it into the brake booster, after the check valve. You now have vacuum in the actuator holding it shut.

so whats the general consensus on this wastegate mod? Im looking to run around 25psi on my big 16g with e-85 but am considering just wireing the wg flapper shut since my motor is built and i have all the supporting mods to max out the 16g. I may just try it anyway because im pretty sure i can get a holset actuator pretty cheap and i have a few mitsu actuators laying around.

Just reading through this older thread, wired shut flapper is the worse you can do for performance. You can make more power with the internal setup right. It all has a lot to do with the spring tension, flapper port size, and housing size. Ive managed to have the best control on both the E316g and 14b with a well ported E3 housing with a stock flapper. Also running the E3 actuator with a couple shims. i get a spike on the both tubos but its been more beneficial in my case for performance reasons. On the 16g Ill still flatline and hold 27psi.

What would be really cool would be a dual port internal actuator. You come across any of those @JusMX141??
 
Just reading through this older thread, wired shut flapper is the worse you can do for performance. You can make more power with the internal setup right. It all has a lot to do with the spring tension, flapper port size, and housing size. Ive managed to have the best control on both the E316g and 14b with a well ported E3 housing with a stock flapper. Also running the E3 actuator with a couple shims. i get a spike on the both tubos but its been more beneficial in my case for performance reasons. On the 16g Ill still flatline and hold 27psi.

What would be really cool would be a dual port internal actuator. You come across any of those @JusMX141??
Some vacuum on the actuator doesn't keep it from opening, it acts like a stiffer spring, it just blows open at a higher exhaust pressure.

My best results were with a holset actuator. My td05h 20g would hold a rock solid 30 psi with one.
 
Turbosmart makes a dual port one. I've been running the actuator from my WH1C on my hy and he351 for 5 years now. rock solid boost control from 15-30psi depending on the preload. I do use an ecu controlled boost to keep it flat at high boost though.
 
I built two of these actuators and they work great. I messed up on my galant and overported a 7cm turbine housing with 34mm wastegate flapper on a td05 20g and it blows the wastegate open at 30 psi. I made the exhaust flow to the wastegate too fluid and when i hit 30psi in 2nd gear it drops down to 26 by redline. The one on my talon works perfect 30psi till redline.
And it was like the one in the picture. But it wont activate till 20+psi so good luck with low boost(under 20psi).
 
Can you not grab the universal turbosmart IWG and buy a lower adjuster rod for it?. They did once make one for our turbos but not been around fir a while now. Other then that mamba make a piston type viton actuator and then there is kinugawa! Alot of folks over here like the kinugawa and never had issues with them, the last resort is forge motorsports but its pretty much exactly the same as kinugawas and i out money on it that its most likely made by the same company and forge do make good stuff. A little expensive but good. I got 2 mhi 16g actuators in the garage and i was going to modify them aswell but choose against it as its not going stronger in terms of springs so i saw it as pointless and only is doing half the job needed to be done
 
I received my forge actuator last friday! I decided to get the red spring installed 17-20 as i plan to run 20psi so thats what they said i should go for! I might pick up the spring kit anyway as i dont know how it will all plan out with the ecmlink built in ecu boost feature with there electronic solonoid.

I got to modify a new bracket yet to make it fit on my comp housing still and this whole turbo wont be on the car till at least early next year!
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