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Forge Wastegate Actuator


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#1 HeavyIron

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Posted 06 November 2009 - 05:55 AM

Tired of your old worn out stock actuator going limp at anything over 16 psi?<_< Is a Garrett with a 10-12lb spring just not enough?:monkey: Well, for a mere pittance, Patrick and the crew at Forge Motorsports will build a custom actuator to your spec. B)

Could not get a mount from them so I had to reuse my old one by grinding it off. It is molded as part of the wastegate, but some careful grinding work and drilling two holes makes it work great. I will have it installed tomorrow and will let you all know how it works.

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#2 magicaljake

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Posted 06 November 2009 - 06:00 AM

very nice!!

how much?

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#3 Spanky

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Posted 06 November 2009 - 06:14 AM

Tired of your old worn out stock actuator going limp at anything over 16 psi?<_< Is a Garrett with a 10-12lb spring just not enough?:monkey: Well, for a mere pittance, Patrick and the crew at Forge Motorsports will build a custom actuator to your spec. B)

Could not get a mount from them so I had to reuse my old one by grinding it off. It is molded as part of the wastegate, but some careful grinding work and drilling two holes makes it work great. I will have it installed tomorrow and will let you all know how it works.



Just cut one off a few weeks back so sconeman could start making some universals. If you dont mind me asking what is the bottom diameter of the actuator that you got?
Looks like a nice setup ;)
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#4 johnloves850's

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Posted 06 November 2009 - 01:21 PM

Mmm.
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#5 Zaitz

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Posted 06 November 2009 - 02:32 PM

Why 22lbs? Mine is 15 and it is annoying.

#6 T5Manual850

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Posted 06 November 2009 - 03:06 PM

Why 22lbs? Mine is 15 and it is annoying.


you guys would need a better form of boost control with strong wastegates like this, stock bcs can't handle it and mbc's will spool way too fast. An ebc is recommended if you are gonna run such a strong wastegate.
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#7 GeraldJ

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Posted 06 November 2009 - 03:46 PM

I'd be curious to see how the 22psi spring is going to work.

What is your boost limits set at on your ebc?

Are you still running the 19t?

Unless your pushing close to 30 psi the gate will never fully open. If I remember right the stock gate is somewhere around 5 or 6lbs. My external gate has a 12lb spring in it and I can run 20+ psi all day and hold it to 7000rpm without a hint of fade.

Be glad with the forge you can change the spring, I would go ahead and order at least 2 more, A 10lb and a 12lb.

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#8 dongle

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Posted 06 November 2009 - 03:55 PM

They run ~$150-180. Fully rebuildable, multiple spring options just like the valves, + Lifetime warranty. I <3 Forge.
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#9 Zaitz

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Posted 06 November 2009 - 04:07 PM

you guys would need a better form of boost control with strong wastegates like this, stock bcs can't handle it and mbc's will spool way too fast. An ebc is recommended if you are gonna run such a wrong wastegate.

I have an EBC. The 20g works fine and spools nicely.

#10 lookforjoe

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Posted 06 November 2009 - 05:05 PM

Nice fabrication!

I have an EBC. The 20g works fine and spools nicely.



Ditto on that.

I have the 15psi Hahn actuator - it simply will not open below 15psi, period. I would think a 22psi setup is definitely not wise if you are running less than that (22psi). It will have to be set as loose as you can get without the WG actually opening...

I only went with the 15 over the 10 to allow the Apexi AVC-R more finite control (lower duty cycles) over the actuator, since I never run less than 20psi now.

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#11 gdizzle

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Posted 06 November 2009 - 06:33 PM

I've been very happy with mine, no issues so far.
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#12 Mesoam

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Posted 06 November 2009 - 06:46 PM

what spring greg?
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#13 gdizzle

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Posted 06 November 2009 - 07:15 PM

what spring greg?

15psi IIRC. It spools very quick.
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#14 Mesoam

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Posted 06 November 2009 - 07:33 PM

I do recall that :lol:

It spools very quick.


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#15 EricF

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Posted 06 November 2009 - 07:37 PM

you are gonna run such a strong wastegate.


If the user is running over 22 pounds of boost, then I would contest that the 3-4 pound stock wastegate would be the "wrong" wastegate in their application...

I think with a 22 pound spring, and target boost of 22 pounds, you need no boost controller at all, no? :arob:
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#16 HeavyIron

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Posted 07 November 2009 - 02:45 AM

very nice!!

how much?


$160.00 shipped B)

you guys would need a better form of boost control with strong wastegates like this, stock bcs can't handle it and mbc's will spool way too fast. An ebc is recommended if you are gonna run such a strong wastegate.


Not running stock BCS, I am running IPD's TCV and my ecu is setup for 25psi
1998 S70 T5 SE SC901 Dynaudio,Dolby Pro, IPD sways & HD endlinks, Koni Yellows, H&R springs, BBS Tritons, IPD upper engine mount and lower tranny brace, QBM firewall mount, 302mm brake conversion, SS brake lines, Zimmerman cross drilled F & R, IPD cold air intake, MSD 6AL Ignition box, MTE 25psi tune, IPD intercooler, RIP kit, Built engine, 19T, Custom Forge WG actuator w/18lb spring and other good stuff

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#17 GeraldJ

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Posted 07 November 2009 - 02:49 AM

$160.00 shipped B)



Not running stock BCS, I am running IPD's TCV and my ecu is setup for 25psi


Your going to find that the ecu will not like the 22psi spring. Go ahead and do yourself a favor and order some lighter springs.

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#18 HeavyIron

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Posted 07 November 2009 - 02:50 AM

If the user is running over 22 pounds of boost, then I would contest that the 3-4 pound stock wastegate would be the "wrong" wastegate in their application...

I think with a 22 pound spring, and target boost of 22 pounds, you need no boost controller at all, no? :arob:


Since I hope to be able to push 25psi+, I am hoping the 22lb spring will eliminate the need for an external controller

Just cut one off a few weeks back so sconeman could start making some universals. If you dont mind me asking what is the bottom diameter of the actuator that you got?
Looks like a nice setup ;)


Bottom diameter is 2". tons smaller than the blue grapefruit that Greg has. - Although that looks awesome in its own right
1998 S70 T5 SE SC901 Dynaudio,Dolby Pro, IPD sways & HD endlinks, Koni Yellows, H&R springs, BBS Tritons, IPD upper engine mount and lower tranny brace, QBM firewall mount, 302mm brake conversion, SS brake lines, Zimmerman cross drilled F & R, IPD cold air intake, MSD 6AL Ignition box, MTE 25psi tune, IPD intercooler, RIP kit, Built engine, 19T, Custom Forge WG actuator w/18lb spring and other good stuff

XS Energy Click the link to the left for the best energy drinks on the market.
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#19 GeraldJ

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Posted 07 November 2009 - 02:53 AM

Since I hope to be able to push 25psi+, I am hoping the 22lb spring will eliminate the need for an external controller



Bottom diameter is 2". tons smaller than the blue grapefruit that Greg has. - Although that looks awesome in its own right


like I said, I have a 12lb spring in my gate and push 20lb'o'boost all day. Holds 20psi solid from 4000 to 7000, starts moving the needle into boost around 3100.

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'96 855, Koni yellows, ipd springs, TT-USB

Eagle H-beams, Weisco pistons, custom cams

GT3071R, 60lb/hr injectors, Ported R Mani, W2A intercooler

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#20 HeavyIron

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Posted 08 November 2009 - 05:51 AM

Thanks to my wife for capturing my best side as I was switching out actuators. This was hands down the single best modification that I have ever done for $160.00. I now make 15psi of boost at 2500rpm!!!! I have 25psi by 4000rpm. Most guys are barely into boost at that point. part throttle acceleration from 55-90 is amazing, the transmission doesn't even downshift. I have torque down low that I never knew existed. You couldn't get me to change springs. I HIGHLY recommend this setup. I just put 150 miles on the car after the switch out and utter perfection is an understatement. In two weeks I will be back on the dyno.
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like I said, I have a 12lb spring in my gate and push 20lb'o'boost all day. Holds 20psi solid from 4000 to 7000, starts moving the needle into boost around 3100.


By 3100 I have 20psi of boost on tap :ph34r:
1998 S70 T5 SE SC901 Dynaudio,Dolby Pro, IPD sways & HD endlinks, Koni Yellows, H&R springs, BBS Tritons, IPD upper engine mount and lower tranny brace, QBM firewall mount, 302mm brake conversion, SS brake lines, Zimmerman cross drilled F & R, IPD cold air intake, MSD 6AL Ignition box, MTE 25psi tune, IPD intercooler, RIP kit, Built engine, 19T, Custom Forge WG actuator w/18lb spring and other good stuff

XS Energy Click the link to the left for the best energy drinks on the market.
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