Warrtalon

iTrader: (6)

Wow, Girlie, that is exactly what Chris's boost looks like on the dyno.

Chris, have you cleaned out the bleed hole on the MBC already?

GTKage

iTrader: (1)

well i have the hallman MBC so i dont think it applies to me

Girlie

Could it be a Hallman+IX thing...? How was Joshd's when he had your Hallman Clay?

Girlie

Warrtalon

iTrader: (6)

It seemed to work perfectly, but I don't have a MAP sensor boost chart to show it for sure. I also wasn't there when he did it. My Hallman was at TSF, and they put it on Josh's car when he came by to test it out.

GTKage

iTrader: (1)

well i ll look at the mbc, make sure it s clean, i ll let u guys know

Girlie

Joshd posted a chart with the turbosmart MBC, Chris had the Forge. Both had the same mail in flash. One had a double spike like me(Forge user) the other no double spike but a taper issue. I would think that the problem lies in the MBC more than anything else. Maybe someone else running a Hallman could chime in on this.

Girlie

GTKage

iTrader: (1)

what i dont understand i had the same MBC on my 05 EVO 8 and i didnt have that problem

Girlie

MIVEC

MBC's have a hard time keeping boost steady with the cam timing changes.

Girlie

GTKage

iTrader: (1)

yeh that s what i figured, it s a timing issue, i know the car is knocking duriong that double spike, form the log i have done, so i hope with some ecu tuning it will solve the problem. if not i ll have to try that forge UNOS MBC

cij911

iTrader: (14)

I have the Forge and am having the double spike. I think the way to go is an electronic unit......Or control boost with the ECU (like stock)....

cij911

iTrader: (14)

Clay,

I have not touched the MBC in ~800 miles. When I had it open it looked perfectly clean to me....

I am going to try to find someone at Mitsubishi Racing to see what they are doing to the IXs. I suspect it has something to do with the MIVEC, back pressure, and rate of boost change (but that is just an uneducated guess) and the affects to the MBC.

I WISH Buschur had some ideas.....I have 100% confidence that he'll know what is going on ....Maybe with your new partnership you can get his $0.02....Hope all is well in Colorado.

cij911

iTrader: (14)

Girlie,

How did Al clean the MBC? Did he use just compressed air or a cleaner? Is this a problem we will have to constantly deal with? Thanks for the graphs....

Warrtalon

iTrader: (6)

It's only to clean out the anodizing material that gets stuck in the bleed hole. Once it's out, it won't re-materialize unless you go get it re-anodized. I don't remember what Al uses, but he wrote it up in his thread designed specifically to address this issue. Remember, we're only talking about the little bleed hole. I think he got a pin small enough to fit, and scraped everything out. After that, some compressed air wouldn't hurt...

joshd

iTrader: (1)

Chris - after seeing girlie's plot, which looks exactly like yours, we clearly need to clean out your Forge MBC.

My latest plot doesn't show a double spike because of the extreme smoothing, but I do see it on the road. I've seen it to a greater or lesser extent with all of the controllers I've used. The Forge was just the worst.

I think there is enough data here to show that MBCs do have a harder time controlling boost on the IX ... however, I'm still not convinced that a little tightening of the wastegate actuator won't help things a bit.

Also - chris ... you don't really want 21psi at redline on the stock turbo with stock exhaust. I don't have the compressor map, but I'd be willing to bet that it would be out of it's effeciency range. 18-19psi is probably something better to shoot for ... I'm only 3+ psi off

By the way, I think you should be the first one to buy the EBC and let us know how it works

Girlie

I'll second that

Al uses a the little tool you clean a torch tip with. And like Clay said, it's just the bleed hole, not the insides with the spring and ball.

Girlie