BS3... closed loop wideband control 
BS3 vs HPT 3 bar?
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From: Port Tobacco, MD
BS3 vs HPT 3 bar? We need to decide if we're going to run the BS3 or a HPT 3 bar setup in our next project car. The car is not a chevy platform but will have a LSx based motor and PG trans. We're shooting for 1200-1600hp, initally we're leaning toward the BS3 but many have said that the HPT 3 bar program will work just fine.
ahh so what is better (price per options) HPT 3 bar setup or BS3? i am looking for an aftermarket engine controller that can for the time being control a 427 LS motor naturally asprirated and be able to control the same motor under big boost (once i get around to building the turbo kit)?
Originally Posted by foff667
Yeah I think the injector issue will be the hardest thing to get around.
Agreed. The stock PCM with a good tuning package is IMHO better up to a point than most of the aftermarket systems. Some of software interfaces available for the stock PCM are MUCH nicer than some of the aftermarket pieces out there. Problem is that when you try to go too high with the RPM or run too much injector the stock computer was never really designed to do this, even with some of the custom operating systems out there.
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Your only issues would really be the low impedence injectors.
You would have more control over driveability and overall tune with the stock PCM. Its a much more robust controller. The stock PCM also has higher resolution than aftermarket controllers.
Whats also great about our 3bar solution is that it comes with real time tuning!
You'll be able to flash your base tune in on the dyno, then real time tune your fuel and spark maps without having to shut the car off.. just flash them in after your done and your set.. It makes tuning a breeze.
Plus, with our MPVI Pro, you can plug in your widband 02 and datalog the vehicle while at the track without having the laptop in the vehicle. Then just bring the MPVI Pro back to your pit, read the log out of the MPVI Pro with the laptop and check out how your tune did that pass..
You would have more control over driveability and overall tune with the stock PCM. Its a much more robust controller. The stock PCM also has higher resolution than aftermarket controllers.
Whats also great about our 3bar solution is that it comes with real time tuning!
You'll be able to flash your base tune in on the dyno, then real time tune your fuel and spark maps without having to shut the car off.. just flash them in after your done and your set.. It makes tuning a breeze.Plus, with our MPVI Pro, you can plug in your widband 02 and datalog the vehicle while at the track without having the laptop in the vehicle. Then just bring the MPVI Pro back to your pit, read the log out of the MPVI Pro with the laptop and check out how your tune did that pass..
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I use HPT myself, but Magnus, most aftermarket controllers have RTT and internal datalogging. And for the HP they're shooting for, are there really any impedance converters that will work well with the size of low imp injectors that will be necessary. (hint,hint, you should make one)
With BS3 you can leave the wideband(s) on, select a target AF, and it will correct for it.
From what I've heard about how difficult it is to get a crisp tune with 160's, I'd just get the BS3. I think if you looked around at all the guys making 1500hp or more, they are running BS3 or maybe a FAST XFI... but probably a 9:1 ratio since the BS3 is simpler.
From what I've heard about how difficult it is to get a crisp tune with 160's, I'd just get the BS3. I think if you looked around at all the guys making 1500hp or more, they are running BS3 or maybe a FAST XFI... but probably a 9:1 ratio since the BS3 is simpler.
go with the BS3... I have it on my car and it is easy to tune and easy to install into the car. The other good thing is that it has internal data logging so you can monitor your engine without staring at a gauge
