Lucifer gets new Turbo setup!

[sasquatch]

that manifold looks very close to the one I built for my festiva.... sweet build

[Advancedynamix]

The Subaru sound comes from a total unequal length system.

Btw if it wasn't evident in the above pic link, that is the DAE header.

That link shows the B3 header though. I thought Matt made a few b6t headers like that B3 one. It's been awhile.

[bhazard]

I only remember him making a direct replacement B6T manifold with the removable collector flange.

[FestYboy]

That link shows the B3 header though. I thought Matt made a few b6t headers like that B3 one. It's been awhile.

You're right, that's the header I associate with DAE. For some reason I went stupid and assumed it was for the dohc b6 because I knew he he had built a few for that platform as well.

[mikemounlio]

What is the propper way to torque manifold bolts? Its impossible to get a torque wrench on each nut! Am i missing something here?

Lucifer has a couple stripped out bolts in the block. Im going to have to use a helicoil on them. I want to prevent future stripping.

[FestYboy]

Do it in stages from the center out. Use as short an extension as possible without having to take the torque wrench off perpendicular. Load the wrench slowly. If it doesn't feel right, back it off, inspect the nut for binding on the lock washer, and try again.

[mikemounlio]

I can get the torque wrench in at all but 1 bolt. I have to use a wrench on most of it.

[bhearts]

I can't remember exactly what it looks like. "Ram horn" is a description of a typical mid length, equal length 4-1 turbo manifold. They don't always work the best, but in the case of the b6t, any extra runner length is a benefit. The stock manifold places the turbo too close to the exhaust ports and it doesn't take much for the heat to back up and melt the pistons or cause detonation problems. I'd be willing to bet that this design flaw is a big reason why the b6t is 7.8:1 compression rather than the more common 8.5:1 that we see on most fuel injected turbo 4 cylinders from the 1980s.

Edit: just looked at the picture. I don't remember the DAE b6t manifold looking like that. It should work better than the stock manifold. I would move the 02 sensor from the collector to the outlet. I've melted b6t o2 sensors before and it ruins the turbo.

Why such an issue on these engines. I mean look at the focus st, the turbo bolts right to the head. Why don't they have over heating issues also.

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[FestYboy]

I would suspect the added thermal mass right at the exducer helps keep the temps in check.

[mikemounlio]

The manifold came in last night! Its not bad. The flange is thin looking. The collector apears non welded! Its welded in place with tabs but the pipes are just slip fit into each other. I will have it welded up the rest of the way. I cant wait to see it on the car.

[FestYboy]

They might be slip fit on purpose... Welding a slip joint will cause issues elsewhere.

[mikemounlio]

If it was made by dickmyer i think im best off leaving it alone. Im sure he knows more then me... Ill run it as is and see how it does.

[FestYboy]

Took a second look: it is a slip joint, and that means the turbo needs to be secured to allow the horns to move freely.

[Advancedynamix]

Why such an issue on these engines. I mean look at the focus st, the turbo bolts right to the head. Why don't they have over heating issues also.

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Sequential direct injection for one. Camshaft profiles and timing also contribute. The wastegate size, as well as the overall design of the turbocharger. Add a knock control system that is 20 years further along as well.
Don't be fooled though, these new high tq low displacement direct injected turbo engines are not set up for the kind of power that is beneficial to lap times. These engines all make lots of low end TQ. They are designed for quick spool and fuel mileage.
The tips I'm giving are for a high performance engine build that will make the car faster in a road racing or autocross environment with readily available engine management systems, not to meet industry standards for fuel consumption or emissions output. Direct sequential injection is the cats meow, but price out what it would cost to put that type of system on a b6t.

[mikemounlio]

MPH hahahaha not here!!!