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iTrader: (1)

Hmm, pretty cool idea!

408GT

iTrader: (2)

I've been told it works pretty good!

Guard dog

You can squeeze more boost out of a 4 port but the 3 port reacts quicker and is more accurate (less likely to see boost creep). I also don’t really want to run more than 20psi because I think I can keep her alive at that level. I should be about limited to that with the 3port setup and the 10psi spring.

Guard dog

Little update a long time coming. The Holley is in but the car wouldn’t idle. Occasionally it would drive fine and then it acted like the tune was off. Everything checked out in terms of sensors, compression etc. I suspected the reluctor wheel spun. When the motor was pulled, found the 24x wheel moved. You can see where the wheel tried to friction weld itself to the crank and the heat marks.



So the engine is getting a 58x wheel welded to the crankshaft and everything else triple checked while it is out. Also getting a new LJMS cam better suited to a 6.0. Once it gets back, it’ll be stabbed in, the AC hooked up and the exhaust finished. Then, final tune and track time. Hope to have her ready to roll this spring.

forcd ind

iTrader: (7)

Switching from a 24 to a 58 I think creates some problems-Cant remember if when you pic 58 the Holley also wants an LS2 cam sensor, and switches A & C on the cam sensor, then looks for a diff count. It also wants +5 to the sensors instead of +12. I think one guy that switched just got the front cover and cam gears when switching, and bought the LS2 harness, although you could mod yours-the corvette guy I think sells a kit, his name escapes me, lol.

Tjabo

Could that have anything to do with the problems you had with the Gold Box? My home built MS3s have never failed me at all, even in daily street driving lots of miles, year round, so I'm very curious to know if there is some weakness that has crept into the gold box. Every time I've thought my MS3s were messed up, it was me screwing something else up and the MS3 was perfectly fine..

Guard dog

That’s only possible if the reluctor wheel was bad from the first start up with the gold box. The gold box never worked completely and slowly deteriorated. For instance, I can’t understand how a loose reluctor would cause the gold box to be unable to log? I think my gold box was the root cause and led to my reluctor spinning. I wasn’t pushing anything hard enough to do that. When my car shut down on the big end of the 1/4 mile at LSFest it felt like I ran into a brick wall. I was shocked that there wasn’t a plume of smoke and oil in my rear view mirror. I think that caused the reluctor to spin.
When the Holley was installed, everything on the Holley worked and checked out. That never happened with the gold box.

Guard dog

So there’s that.



58x welded reluctor in the 6.0 iron engine.

Guard dog

More progress, just waiting on some odds and ends like shielded wire for the new crank sensor before she can be buttoned up and fired up.


Still got a chance to get the exhaust done. She needs to be started to see how loud it gets. Goal is whisper quiet at idle and cruising with boost activated cutout opening to let all hell break loose unde boost. There’s plenty room for more mufflers if necessary.

svslow

I really like the exhaust. I am working on a similar set up for my car.

408GT

iTrader: (2)

Looking good man. Did you stand on that air filter to try and get it short enough to fit?? HAHA

Guard dog

Thanks, it’s one of those rare times when the vision in my head exactly matched the final reality.

I may have persuaded it a little . The important thing is that it does fit because I plan the drive the heck out of this thing.

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iTrader: (1)

Guard dog

I’d like to neck it down to a 2” pipe and run it out the rear like a stock straight 6 car but I’m losing real estate above the rear end. We will see how she sounds with the current set up.

408GT

iTrader: (2)

I like his setup. Cruise around quiet, less weight than our full 4" with muffler, and less restriction when on the throttle. Is this the vacuum actuated cutout? Vacuum keeps it closed then it opens under throttle?

Guard dog

It’s a boost activated cutout. It’s supposed to open around 6psi which the s480 should have no trouble making on a 6.0 even with the 2.5” single exhaust. It’s also built so the cutout gets all priority so it should turn into a real animal when it opens. Downpipe is 4” from turbo right up to the 3.5” boost activated cutout with only one 45 degree bend.

forcd ind

iTrader: (7)

I was hoping to run 4" out to the rear bumper on my Nova, about the only spot for a muffler is just short of the rear raised area of the floor-I ran 2 mufflers on the Buick trying to quit it down. I thought about a cross over and duals, but the cross over pipe for the turbo is in that spot-that is an idea of creating a dump, go to a smaller tail pipe.
That's what I like about this site, tons of diff solutions, lol
One of the muffler Cos. has a muffler with an internal flap that opens with pressure, kind of a cool idea.

Guard dog

It’s very hard to make a 4” exhaust quiet. Much easier to quiet down a smaller diameter tube.

408GT

iTrader: (2)

Mine has a full 4" exhaust that exits in the factory location w/ a 4" MF straight through diesel muffler and it's not very loud at all.

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iTrader: (1)