Braineack

iTrader: (62)

you can make full boost in first.

if you cant hit 12psi until 3rd gear you have big issues.

ScottyP3821

iTrader: (2)

So I'm thinking this is a wastegate actuator issue. The only way I have been even close to getting near my target in 2nd gear and at my target in 3rd is by adding a **** ton of preload. Even then boost falls off up top. With this much preload I'll over boost in 5th.

With normal preload I can only spool the turbo up properly in 4th and 5th. So I'm thinking it might be that time again when I go back to the kinugawa actuator.

For my closed loop settings I have tried using both the basic slider and PID. I'm not a newb when it comes to closed loop. I really think it's the actuator where it is lacking. I can run 10psi all day just fine nice and flat. However 14-15 psi is no dice. I might have a bad actuator or they could all be this way. Who knows.

18psi

iTrader: (76)

try OL control. set to ALLOFIT. cut at 14-15 or something. before throwing parts at it

ScottyP3821

iTrader: (2)

Ran all of it in open loop. It's acting very similar. Hits full boost in 4th and cuts in 5th but 1-3 are pathetic

bahurd

iTrader: (8)

@ScottyP3821

Curious on the amount of preload you consider normal? Relevant because I shot a PM to Lars this morning.

ScottyP3821

iTrader: (2)

So what I do is I screw the actuator until it easily slides on to the wastegate arm. Then I add 6 half turns to that for preload. That's how I've always done it.

dbuck1326

My kit came in yesterday, everything looks awesome. Installed my megasquirt yesterday so hopefully I can get the kit installed sometime in the next few weeks.

bahurd

iTrader: (8)

That jives with what I've seen also. 3mm but not sure how that squares with the actuator rod thread pitch. I'll check that when I get home.

shuiend

iTrader: (24)

Get the megasquirt in and running for a while before you install the turbo. Just so you have time to familiarize yourself with it and learn to tune some without blowing up your motor due to something stupid.

18psi

iTrader: (76)

That should be enough for sure. It's either defective, getting stuck, or some other issue it seems like

shuiend

iTrader: (24)

For reference of what I told bahurd in our pm's. I basically just rotated the front compressor housing to put it where I wanted it and bolted the wastegate back up. I did not adjust the preload at all from how it came out of the box. I also have not ran any more boost then the stock wastegate so far. One of these days when I get done with the rest of the GB setups I will go back and finish playing with the test car. It is more of in my limited time available getting customers setups done and out to them was a bit higher priority to messing with my setup on my test car.

ScottyP3821

iTrader: (2)

So I was comparing my old 2560 actuator the 8psi on to the 7psi on the China charger and I noticed there is no wheep hole in the canister. When I bench tested the 8psi to the 7psi I noticed that the 7psi will just keep pressurizing with out bleeding air where as the 8psi actuator will bleed air as it is pressurized. I noticed a wheel hole on my kinugawa actuator as well that I had on my old setup. So anyone think it just might need a wheel hole? Does anyone else's Chinacharger have a hole and mine just didn't get drilled at the factory.

bahurd

iTrader: (8)

I'll check mine tonight, don't recall. It would seem the spring would be the main means of controlling the actuator working or not. Weep hole is for condensation?? Question cause I'm not sure...

shuiend

iTrader: (24)

Can you take some pictures of the differences? Any chance the actuator from your 2560 could swap over just to try. I will check out all the turbos I still have at my house this afternoon to look for wheep hole.

sixshooter

iTrader: (12)

Scotty,
Check the puck on the actuator to make sure the edge of it doesn't catch on the hole you opened up, not allowing it to close flush. I've seen it before. That's why the holes are smaller than the pucks on the flappers by a good bit or they are D-shaped.

Braineack

iTrader: (62)

are they not dual port actuators now?

ScottyP3821

iTrader: (2)

The 2560 actuator will not fit. It is the One FM sells that requires that adapter mount where the actuator mounts to the front of the compressor.

bahurd

iTrader: (8)

Just checked mine. No weep hole (but still not sure that's an issue).

Not on the one I have.

ScottyP3821

iTrader: (2)

So an Update. I got the car to run around 11-12psi 1-2nd and 12-13 3rd-5th I think this might just be as good as is gets. I am re configuring my timing table a little bit now and need to let the car cool. Im pretty sure I dont have any hair left on my right calf. As far as im concerned(others may get better results) I need a new actuator. I drilled a weep hole and it did help some what but not a significant as I would have liked.

Would I recommend other do it? No not worth it.

I will hopefully soon purchase a different actuator. Im curious to see what others results are.

aidandj

iTrader: (5)

<p>Wire the wastegate shut and see how much boost you can actually make in 1st and 2nd. Then you will know if its the actuator.</p>