Time to start assembling 1.5 TD / 1.9L Franken Diesel.

[justiz00]

Was that compressor surge 27-32 seconds in the video?

[Jetmugg]

I don't know about surge, but it was building boost very quickly at that point. 

I want to get the corresponding video from inside the cab posted this evening.  That video should show rpms and boost, but may not be able to see the EGT's from the GoPro footage.

Does anyone know a way to directly embed the video link in this forum software (so the video appears directly in a forum post).  I can't figure it out.

http://www.youtube.com/watch?v=1NYikOly9S0

Steve.

[RabbitJockey]

that is definitely a concerning sound.  but it could just come down to the acoustics of the room or something, but i'd be wanting to look in to that.

[Jetmugg]

I think that was a "full boost" run, with the wastegate essentially blocked off (unintentionally due to improper plumbing).  I hear the sound you are describing, but don't have a good idea what caused it or what to do about it.

I know that I need to get the boost controller plumbed properly, so that I actually have some way to control the boost.

I don't know that running the full 30psi (never opening the wastegate) is "proper".  I'm thinking that I should be a bit lower than that on boost, while still retaining the ability to adjust it as needed.


Steve.

[RabbitJockey]

did you notice that sound during the dyno session?

the only thing you can do about that sound if it is surge is to either increase flow or lower boost pressure, that or get an antisurge compressor housing(ported shroud)

proper working wastegate should help make more power and low egt too.

[theman53]

I would definitely like to see what the EGT, boost, and RPM were at that point. Seems like there is a little bit of smoke until it lights the turbo. It also seems like you are short shifting it a bit, if you let the Rpms climb a bit more so there is a bit more flowing through the engine you might not get that smoke as bad and it may help light the turbo.


BTW, great work on getting it done and hopefully having a shot at this.

[theman53]

I don't know about surge, but it was building boost very quickly at that point. 

I want to get the corresponding video from inside the cab posted this evening.  That video should show rpms and boost, but may not be able to see the EGT's from the GoPro footage.

Does anyone know a way to directly embed the video link in this forum software (so the video appears directly in a forum post).  I can't figure it out.

http://www.youtube.com/watch?v=1NYikOly9S0

Steve.

I don't think our forum supports it. There is no way to do it that I have found yet, hence the random safe youtube video thread in the general section just linked.

[745 turbogreasel]

On my boost regulator, I had to file a tiny notch  in the ball seat, much like a bleed, but  internal.

[Jetmugg]

Re:  Short shifting - I totally agree that winding out each gear will be better on the salt.  The dyno guy wanted me to short shift so that I could get into 4th gear at less than 2000 rpms, then "roll on" the power from there.

One of my weekend projects is to re-plumb the boost controller, in the hopes of having some control over it.

The biggest question in my mind is still "How high should I let the EGT's climb on the salt?"

I'm going to do some work tonight, trying to get the GoPro footage loaded, edited, and YouTubed.

Steve.

[Jetmugg]

On my boost regulator, I had to file a tiny notch  in the ball seat, much like a bleed, but  internal.

Very interesting.  I have not heard of this before.  Can you share any additional info?

Steve

[Jetmugg]

OK - here's the in-cab video for the same dyno pull (I think).  The clarity of the gauges is not great, but you should be able to tell what's going on.

The gauge on the far right of the dash is boost.  Straight up on the needle (12:00 position) is 25 psi.

The far left gauge is EGT.  Straight up on that gauge is 1250F. 

Straight up on the tach is 6,000 rpm.

http://www.youtube.com/watch?v=cC_moP40R5A

[justiz00]

I would definitely like to see what the EGT, boost, and RPM were at that point.

When I have experienced surge in the past the boost gauge would pulsate with the engine RPM because more air physically could not be pushed in.

[theman53]

I cannot tell what is going on in my screen. I think you could do many miles with 1250f

[745 turbogreasel]

My MBC is and adjustable steam valve form Mc Master Carr about like so
http://www.dempseybowling.com/perform/grainger.htm

I forget what I actually did to it, ( tiny triangle file maybe?) but I had to make a small groove where the ball closes.
It's been on there probably  6 years without   me having to service it in any way.

[theman53]

http://www.ebay.com/itm/Voodoo-III-MBC-Manual-Turbo-Boost-Controller-0-30-PSI-Subaru-WRX-STI-BRZ-Legacy-/271019372012?_trksid=p3284.m263&_trkparms=algo%3DSI%26its%3DI%26itu%3DUCI%252BUA%252BFICS%26otn%3D21%26pmod%3D271236669834%26ps%3D54

similar to what I use. the wastegate remains closed until the spring is pushed past the point of bleeding to the wastegate. You lose no spool time since you are not bleeding boost off. It is contained until it opens to the wastegate then the wastegate instantly opens and modulates the boost where you have it set. The bleeding type work but you lose air so you are also loosing boost before and after the wastgate open. Also, learning more about turbos and overspeeding, to get to the upper limits of your turbo the more open your bleed type would have to be, the more your turbo is pushing to the air and wasting, the more it could be out of its efficiency range. Just some things to think about. Search ball and spring type boost controllers if you are interested.