Typically twins are different sizes. The smaller of the two spools up before the larger one. It adds boost in the lower RPM ranges. The larger spools up at higher RPMs with more boost.

That's how a lot of the cars do it anyways from what I've seen.

 

Yes I built it. No special options, running the "Extra" code. And yes SCT is not a perfect method for tuning with boost but it does work.
Yes I'm happy. You're adding a second turbo, more oiling complexity, a second wastegete, ect. In certain cases twins can spool a little faster than a comparable single, that's about it. A properly sized single will spool plenty fast. Unless I had a CTD, I'll take a single any day.
Sequential turbos are for building lots of pressure, like what you want with a diesel or supra/syline ect. We don't need all that pressure. You do not want to run 2 different sized turbos in a parralel setup (1 turbo per bank), you want all the cylinders to have equal drive pressure.

 

So, other than pumping oil all the way back to the turbo and all the way back to the engine are there any flaws in the sts single remote turbo mount?

 

Oil doesn't have to be pumped back to the turbo, the feed line from the engine will supply the oil using the engine's oil pump. Only the return needs a pump, don't bother with anything other than the TurboWerx Exa-pump, it's the only one that'll last. Air inlet temps will be cooler. Depending on how you mount the turbo it can be more vulneralbe depending on how/if you use your truck off-road. With a properly sized turbo, lag isn't an issue. I just have a filter directly on the turbo, and we get a LOT of rain here in western WA and there are no issues with sucking in water either. Other than killing the cheap oil pump after 7K miles, my truck has been daily driven with the turbo since last August/~15,000 miles without a problem.

 

Where did you mount yours? And I know on there website it has the option for like a blowoff valve I think and several other extra options, did you get those? Also did you run an intercooler?

 

These should give you a good idea. I'm not running an intercooler. I plan on water/meth injection after I do headgaskets and crank up the boost and timing. The highest air temps I've observed were about 160º in the summer, which is similar to a stock motor pulling air from under the hood. Yes I'm running a BOV, you will want one, compressor surge is hard on turbos.



And a shot of the BOV/Airhat. That's the AIT sensor for Megasquirt as well.

 

As far as fuel goes did you have to upgrade the fuel pump to support the 42lb injectors? also did you need to run fuel return lines for your setup?

I'm in the process of building a mega squirt for my truck and going to be running 48lb injectors ebay t72 and hopefully 12psi inter-cooled on the stock rebuilt engine. any advice offered is greatly appreciated

 

In my case, the stock fuel pump could not keep up, fuel pressure would drop to 20 PSI and duty cycle would skyrocket trying to keep up. Some people have said their stock pumps could keep up for 400+hp, mine would not. I simply used a Walbro 255, still running the stock returnless setup.

Glad to see you're going with Megasquirt and not messing around with making the stock turd PCM work with boost

 

Why would you want to go twin turbo? It's going to cost twice as much as the turbo kit just to get the truck running right. Don't forget all the extra things you'll need besides the turbo kit plus the tune.

 

The idea generally with two smaller turbos, as opposed to one larger one is: Less turbo lag. Smaller turbines spin up faster than the large one.