Here's the thread where we most recently discussed this. I'm the guy who has the 928 BLV installed and hasn't gotten it working yet.

https://www.s2ki.com/s2000/topic/865...wer-to-15-psi/

 

Ok, well if you are going to do the boost limiter valve thing, you are going to need a standalone.

If you are going through the expense of getting a standalone, why dont you just take advantage of the smaller pulley?

So compare someones car w a 12 psi pulley and a car with 12 psi and boost limiter valve trying to get 6 psi.

Yall will be the same speed until you get past 6 psi (provided boost limiter is letting no pressure escape prior to its setting), and then the 12 psi person will blow right past you. So you will spend more on parts, have lower horsepower, and maybe the same midrange. Doesnt sound worth it.

Maybe if you are talking about a 20-25 psi pulley, then bleeding off boost to keep it at ~15, but then you worry about belts slipping.

 

Exactly true... If I gave the 6psi guys a ride in my car, they'd all be on here talking about installing 15psi pulleys the following week.

 

Yea I understand that a 12PSI will smoke you pass 6 PSI, which is why I mentioned for low boost applications. So you can get to 6 PSI faster, increasing low-mid range power without going the high boost route. Kind of like a tweak to stock boost.

Can you explain why you would need a standalone when the stock comptech kit with FMU can handle 5.5 psi? Wouldn't the FMU being a rising rate regulator, see boost and compensate for it?

 

I'd like to know as well as I'm extremely interested in getting more power, as I'm not sure I'm willing to go standalone due to emissions primarily.

 

In some cases (like mine), having more power isn't necessarily a better thing.

You can tune for the higher PSI, and then restrict the boost and run on the same tune. Think of it like having a boost controller on a turbo setup; the end result and execution are very similar.

 

Go kpro, or if you want to work the bugs out, theres the haltech option. If evans releases his harness, you will know the haltech bugs are worked out.

 

Go kpro, or if you want to work the bugs out, theres the haltech option. If evans releases his harness, you will know the haltech bugs are worked out.
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That didn't really answer the question. No offense or anything, I just want to know why you would recommend a standalone for 5~6 PSI.

 

can a FMU handle the boost tapper that the BLV will do?

 

What a novel idea!