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Never a GM turbo again!! IMO they are a large part of the reason these engines have such a bad rep in both power and reliability.

Oh yeah, but manual trannys are better from all the losses from an automatic transmission. Even Jakes Performance says so!

It does make a difference, a stock 4L80E, regardless of controller tuning, which I did not talk about here, is going to have more losses than a stock manual transmission. I think it can be proven in drivetrain loss comparisons with other vehicles. The dyno pretty well proves that too, its a...

Thats an interesting theory, will have to think about that.

Im talking about stock trannys, not high dollar performance stuff, you guys are in the 6.5 section remember.

Well, there is power loss in spinning the heavy coverter itself, and then some slipping is possible and probable even when locked. So its not exactly the same as a manual.

While the Baro sensor is not connected to the manifold, it is still a MAP sensor, just not used that way. Kind of if we take the PMD off the pump, is it still a PMD, or just an FSD. The Baro sensor is a 1-bar MAP and the Boost sensor a 2-bar MAP.

That looks like one someone else had that had to different cast numbers, like 506 where yours is and 141 on the back. Is there anything on the back? And his didnt have the squrter holes despite having the 506 on it. And it had the diamonds in the valley there like that. So either a GM...

Ive heard of that too. Does it have oil squirter holes?

You can just cut out the center part of the gasket, or get a non divided gasket if the steel one becomes too flimsy then. I got some cometic T3 gaskets, they also make V-band gaskets if interested.

The journal bearings probably need some oil in them to compare the shaft play. If you haven't you might consider knife edging and gasket matching the turbo's T3 flange with a grinder/dremel. We dont utilize the dual scroll so that middle divider is not necessary.

I think those new casts you can get that are not AMG probably. like this one http://www.6-5liter.com/block_casting.html I would never get thas over an AMG engine, but still probably better than a used rebuilt GM engine.

But when towing you probably dont care about dusting people :) I like both trannys, they each have their place.

If you dont have pipe bending tools/skills, you can cut a length of the return out, and replace with hose. But also, you could clock the center section to make it line up easier. Basically make it so the oil feed is angled toward the engine a little at the top and the drain angled away from...

It could be that subjecting them to high cylinder pressure at low pop pressure contributed to the issue, if they were up to snuff to start with.

You will be at 2000psi from air pressure alone at TDC from just 15psi of boost and a 21:1 CR. Dont need to be at full throttle. The point is that yes we know the IP can push it out, but if it pops below the cylinder pressure is it going to be coming out clean or start melting injector tips...

You can clean the OS off with a soft towel and some isopropyl alchohol, I always like to get the highest percentage I can, but at least greater than 90% pure. So there is less water in it. If the stores only have like 70% rubbing alcohol then they usually have 100% acetone in the nail polish...

So the basis of using an intercooler is known, colder air is more dense (has more oxygen). You can get the same air mass with less air pressure by making the intake air temp is colder. Making it colder or increasing pressure are both ways to increase the air mass, both used because the volume...

The intake temps are lower with an ATT, but I wouldnt call them low in the mid 200s under sustained boost. For every 1 degree you cool the intake air, the cylinder temp will be decreased 3 degrees (because of compression). The reason an intercooler would be good is because you have a...

And GM only gave it 56psi line pressure at near full throttle. So imagine running a stock TCM and trans with turned up DB2 and boost, or fooling a stock PCM to allow more boost or a little more fuel but still same low tranny pressure. Or an aftermarket PCM that gives you a lot more fuel and...