Boost Control Q

[SeattleSy#1255]

Paul Swab and I were messing with the truck the other night with the WB and code 59...quick question. I am not running a permenant WB at this point so our progress was limited. One thing we did do is up the boost to 20 in the chip. I'm running a PTE 51 and downpipe with the int. WG.

what I am getting is a quick build to 14psi and it holds and at about 70-80mph, wham, the boost climbs to 20 as the computer is targeted at. we have it targeted at 20 right from the get go.

my question is what is making it climb to 14 then finally climb to 20 at higher speeds. Its amazing when it kicks in but won't do so untill 70mph or so. again, its targeted to hit 20 from the get go.

can it be something to do with the WG selenoid?
can the PTE WG act. be adjusted like the stocker?

or is it in the chip: meaning a combo of things like fueling and timing?

again, its target, as seen in tunerpro or datamaster to 20...its constantly working to get there but takes 70mph to do so.

thanks in advance,
Jeff Norman

 

[JSM]

Re: Boost Control Q

initial WG dc may need to be upped in the lower mph section (assuming using mph hack also integrated in 59)

What does your WG DC look like from 0-70?

 

[SeattleSy#1255]

Re: Boost Control Q

initial WG dc may need to be upped in the lower mph section (assuming using mph hack also integrated in 59)

What does your WG DC look like from 0-70?

Well, we hooked up the WB and put code 59 on, but what I don't know is if it will use mph now that I am back to the stock 02 sensor. We ended with just leaving the same bin that was on their, which is decent, and adding 59 so "it can use some of the flags." Obviously my knowledge is extremely limited.

your point makes sense and i'll do a DM run and record the WG DC and see what its doing, that is if your suggestion still holds now that you know i'm running stock ECM/02 stuff.

not sure if this matters, but I can disconnect the boost selenoid and use the base spring preassure (set at about 16psi) and it will build boost faster at the line actually boost to 16psi during a run. Obviously the target of the ECM is 20, but it'll never reach it at this point. But it is an example of boost building faster and higher.

I'll get back to you on the WG DC.

 

[SeattleSy#1255]

Re: Boost Control Q

initial WG dc may need to be upped in the lower mph section (assuming using mph hack also integrated in 59)

What does your WG DC look like from 0-70?

the problem was the wg was way to loose...i tightened it up and it builds boost much faster. Thanks Jeff.