It wasn't a big deal, but my TIAL wastegate seemed to be inconsistent by allowing the system to spike or overshoot 1 bar, and other times it seemed that the boost would not build quick enough. After confirming this by logging some data from the ECU, I decided to take the TIAL off to see if there was a problem like a split diaphram.

When I took the unit off, it looked fine. I decided to disassemble the unit and found that there was significant carbon build up on the valve stem that opens and closes the circuit. I took the valve out and cleaned it up, and re-assembled everything.

There is now a big difference in the way in the way acts and reacts. The manifold air pressure signature in the datalogs is now predictable and appears to be smooth which I can really feel.

The whole disassembly and reassembly took about 1/2 hour, so it might make sense to check yours, if you use one.

 

Good info. I wonder if some of this could be caused by running overly rich during the EFI tuning.

 

You gotta run that thing on the track more Don. 15-20 seconds of wide open boost at a time without a chanceto breath will blow all that buildup off of the valve and you'll never have to clean it.

Mine is self-cleaning.



Brian

 

Dude, I'm happy its runnin....


I will be back on the track in Nov tho.

 

Was it hard to take the wastegate apart and back together because of the spring? Mine has also been inconsistent. Do you guys use a EBC also? I have a Greddy Profec B-specII seems inconsistent as well.

 

The whole process took about 1/2 hour. I installed a .3 bar spring, so I did not have to get my wife to set the screws while I held the halves together. Also, I use the ECU to manage the boost at one bar.

 

I have seen pics of people using one of these to help them with the spring pressure when they take the WG apart & reinstalling it.



I went for a 0.5bar spring and will use my ebc to increase pressure.