KOOLER

Gentlemen,

I'm a bit sick of fixing this turbo actuator, rod, flapper etc. Is there any way to convert this turbo to use external wastegate? To solve the issue once and forever? Anybody did it before?

Thank you!

Anton

Brianawd

iTrader: (4)

http://www.maperformance.com/map-sta...-o2e-cg40.html

nollij

iTrader: (21)

bleh... beaten. got sidtracked.

Brianawd

iTrader: (4)

Only reason was I was on Map ordering mine up

KOOLER

Wow! So I just need to remove my o2 housing and downpipe and replace with that thing? THAT easy?!? Nice

Anybody using it already?

nollij

iTrader: (21)

Plenty of people. Works great.

Just connect the HKS WGA to compressor housing pressure and run your Boost controller to the WGA on the MAP downpipe.

KOOLER

Can I simply keep HKS WG open all the time (remove flapper and actuator) and use MAP WG only?

94AWDcoupe

iTrader: (125)

this product does slow turbo spool. the runners are no longer separated. defeats the purpose of having a twin scroll bolt on turbo. really bad for choice for turbo that prides itself on ultra fast spool.

the best fix is to install a mitsubishi 10.5cm hotside. any good turbo shop can machine the housing to fit. the wastegate can is not the problem. the adjustment comes loose because the exhaust housing is wearing out were the arm swivels in the housing.

Brianawd

iTrader: (4)

Please explain how this slows spool. You are sill using the internal gate in conjunction with the external

RSMike

iTrader: (1)

Jerry is assuming that you're leaving the stock internal wastegate flapper open.

I'm currently running a "dual" wastegate setup with the internal wastegate and an external wastegate.
This ensures that the turbo still spools up quickly, and has excellent boost control with the external wastegate.

Overkill? Yes.
Does it work? Yes.

sparky

iTrader: (1)

Hmmm....You've been keeping this from us Mike! Might you have any illustrative pics to share with us

94AWDcoupe

iTrader: (125)

that wont work here. the problem with the hks turbos is the internal flapper no longer seals on the seat when used with the hks actuator. the bearing for the flapper shaft wears out prematurely. the actuator no longer pivots at proper angle so it doesnt seat the valve flat. many describe the problem as "warped arm" . arm is not warping but the effect is the same.

the only justice for this problem is to replace the bearing and shaft or whole housing with mitsubishi hot parts.


twin scroll effect (fast spool) is lost when flapper opens or doesnt seat correctly in this case.
to use external gate you normally eliminate flapper or weld it open.

mike is using a properly functioning flapper in conjunction with external gate 02 setup. not sure why. I have never had a problem getting internal gates to control boost like they should. maybe he can explain in more detail what he was trying to achieve.

Brianawd

iTrader: (4)

The problem I have had with internal gates is Slow response. I have adjusted them over and over but was never happy. On my old green(my old dsm) when I switch from the internal to external I gained 250rpms in spool. I was hopping running the internal and external set up would give me much better boost control.

KOOLER

I've ordered a flapper door for HKS built-in wastegate (34 mm from Forced Performance, some guys from Russia did us it successfully as a replacement part) and also FP actuator (old school, no nuts & bolts in the middle like HKS has). You've mentioned I also need to repalce bearing and shaft? Are they direct replacement from stock Evo IX turbo? Do you happen to know part numbers if you've did such a rebuild before?

P.S. Turbo is excellent. Works fine. When it works, damn

94AWDcoupe

iTrader: (125)

THe flapper on HKS turbo is 42mm. The mitsubishi 10.5 flapper is 40mm. I also measured bearings to see if shaft and bearing from mitsu turbo can be used. The HKS bearing is larger in diameter. So fitting the mitsu bearing and arm would not be easy. The 40mm will cover the bigger ports on HKS. But I think 34mm will be too small.