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800 hp at the wheels would be approximately 870 crank hp. 870 crank hp would take an estimated (optimistic) 85-90 lbs/min air mass. Figuring a 12:1 air to fuel ratio means you'd require 7-8 lbs/min of fuel (and 93 is about 6 lbs/gallon). If the pump/injector combo can produce that output you...

To provoke some convo, and to make things even easier, here's another option for those who really wish to optimize performance,and enjoy a louder exhaust. Understand that I'm not doing anything to my own ST until the turbo options (which may not ever be available) are up to the task. But, for...

That's probably true. Coming from a performance background, I'm just putting out information for those few people who are looking to optimize the platform while getting the best "bang for the buck". And as I stated in my first point, if your goal is to change the acoustics, buy whatever...

Yes.

Like the sign says, "Free beer tomorrow!"

I'll say this....although I'm deaf in one ear and wouldn't appreciate the acoustics, your attention to detail and workmanship are top notch!

Or, you could go back to the stock resonator (I assume it still fits?) But, try the Borla first, if it's still too loud....

It doesn't make any assumption about the cats. If you use a higher flow cat, you are (hopefully) reducing the velocity loss after the turbine which would be a plus. But put another way, I'd replace the cats before I'd replace the stock exhaust.

So what might work for the ST? Now I'm a DIYer, and have no problem with a loud exhaust at full song, but I have no need to wake the neighbors or alert the bulls when I'm normally driving. I have a suggestion for those that are looking for a DIY low-cost hi-performance system for the ST...

For the last year and a half on this site, I've seen scores of posts on performance exhaust systems. I don't normally post from a soapbox about these things, but as I've posted several times in a number of threads about this particular item, if you'll bear with me, I'll try to put my thoughts...

We know how it works @Ford Guy . You're not understanding. You have installed a loud exhaust. The only possibility of a valve managed system would be to route the exhaust to a quieter system. You don't have a quieter pathway. Unless routing the exhaust through a single side would somehow...

No "dump" valve is going to help you out. If it's now too loud, keep your downpipes and reinstall the factory exhaust! Seriously, you wanted it louder, now it's too loud. I've posted again and again, adding any of these custom exhausts is not going to significantly affect horsepower at 500 or...

I hear you on that. A couple of weeks ago, I took my daughter, son-in-law and three grandkids all to Universal Studios. We were packed, but managed to fit everything inside. On the way down, I noticed several suvs traveling with tow hitch mounted racks. That looked very interesting. Anyone...

https://www.explorerst.org/threads/2021-st-bov.2576/post-33735

You're welcome!

Are you throwing any codes due to the Fenfab cats? Did it come with defoulers or did you add them?

$2000? I bet you would! Another poster has the same setup with approx the same mileage for $550. Just FYI

Oh, and in case you're wondering why this hasn't been done before, I'd suggest it's probably a patent issue for whoever first described the solution. As soon as the patent cost fell below the cost to procure and install the BOV, the change was effected.

You can easily eliminate the problem with ECU programming. In the past you're WOT and let off the throttle suddenly- what happens is a big buildup in pressure between the compressor outlet and the closed throttle valve. With a blowoff valve, this extra pressure is vented into atmosphere or...

https://www.explorerst.org/threads/air-box-mods.2439/post-30917