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It could be me just getting old thinking that the PT67 was causing the problem you're having to occur sooner...I was trying to figure out why. If the problem is identical with both turbos, the point is moot. I was thinking the reason why the PT67 might cause that (from a restriction point)...

Alright then, that makes checking this even more important while your setting TDC: Stock damper have a nasty habit of twisting the rubber up inside and skewing the index. It can make setting your ignition timing a "challenge" ;)

I just wanted to know if it's a stock 2J damper or is it an ATI. Yes, the turbine wheel diameter...the other side is the compressor ;)

The tuner needs to be listening for knock with a set of "ears". Keep in mind race gas is going to delay the onset of knock and is going to give a false sense of security when the cams are adjusted. I guess an initial hack with race gas is fine, but the final cam adjustments need to be done...

^^^ This is where I got the impression. Any idea on the diameter of the turbine wheels? If it's the cam timing (overlap), accuracy and details are very important. It will be a balancing act to adjust to a point where back pressure doesn't cause reversion and your dynamic compression...

The 7M valve train tends to be noisy. Tight clearances don't tend to make it worse though, but it can lead to a burned valve. Did you check your cam journal oil clearances? BTW - The cams won't move...the valve springs are pushing on them ;)

Cousins are fair game in Alabama ;)

GE = 15mm vs 17mm = GTE iirc ;)

Mice! Rats! Squirrels! (it is Alabama you know ;))

Dirgle - It's junk if it's busted and you don't want to take the time to maintain or fix it. ;) Kinda like Poodles said about RK...you run it out of oil and it's the motor's fault for getting RK.

Buck - He's already checked the IC.

Yeah...I know. I'm trying to figure out what changed ;) (I suspect it's in the cam timing)

I have an Apexi EGT gauge...it's a good investment. I have mine mounted in the turbine housing, just behind the flange. 9) Does your boost peak at torque peak, then flatten out to you lose boost at 6400 RPM? 10) Are your adj cam gears set at "zero" or at a reference +/- after you degreed...

Well...it would help if this was posted in the correct section to begin with. The orginal post didn't help...page 2 before we figured out what your are running and on what motor. Might want to read this: http://www.supramania.com/forums/showthread.php?t=20163 Moved.

Jay - 1)Is 6400 RPM about where your torque peaks on the dyno? 2)- Did you have the exhaust ports ported larger? 3)- Are you running oversize valves? 4)-Do you have an EGT gauge...if so, what does it read when this happens? 5)- Specifically, are you seeing an EGT increase as you...

Ditto! Steel threads doesn't play well mating with aluminum ;)

I use Permatex "The Right Stuff"...I've never had a pan leak with it. The TSRM says use FIPG and not a gasket. And, Hvyman is right...you don't need a huge bead, just enough to get a very small amount pushed out the side when the pan is torqued down so you can see it.

The difference of a few grams = milliseconds in terms of spool time. Not anything I would worry about ;)

Fixed ;) No fuel injection either.

Don't run a CT26 anymore...yes I can part with it. The gasket is Toyota OEM ;)