I'm seeing 19psi which seems a bit high

[FrequentFlyer]

I notice, with the peak hold function on my Prosport boost gauge, that I peak at about 19psi. Only mods to the motor I have is a Cobb SRI and Forge BPV (two shims and blue spring). I've read that normal should be around 15psi. Any thoughts as to why I'm reading 19, other than maybe my boost gauge is F'd up? It reads 21-22 in Hg vacuum during idle, which seems normal. I run 93 octane around here.

 

[oskinosmee]

Its just boost spike it will always fall back down

 

[CWPspeed3]

I thought its supposed to hold 15psi and spike around 18.5psi so if your reading 19psi that doesnt sound bad for an upgraded BPV.

 

[phantom6294]

According to a DashHawk log on my totally stock car with a suspected boost leak, I spiked at 19.14 psig. After that, I couldn't seem to even hold 15 psig. This, however, is the highest I've seen it spike. Upper 17.xx to lower 18.xx is the more typical spike I see.

 

[oskinosmee]

ive spike as high 22psi with a mscai

 

[UHATEIT]

ive spike as high 22psi with a mscai

thats freakin high! I have some mods on mine and I settle at like 16.2 and spoke around high 19 to low 20. 22 much be very nice

 

[oskinosmee]

True. Then i started running a MBC and BCD thats for sale. But now i run a standback which goes 19 psi and holds 18psi

 

[UHATEIT]

True. Then i started running a MBC and BCD thats for sale. But now i run a standback which goes 19 psi and holds 18psi

pretty hardcore bro, hows the mpg compare on that with the standback? I wouldnt mine MBC n all that just need the mpg for a daily driver and would prefer not to lose that. I only floor it to get onto the freeway or to hear my Greddy bov hehe, otherwise I keep it low key and watch the vac guage and a/f guage to get the best mpg I can

 

[oskinosmee]

As long as your out of boost i get good mpg. s*** i drive fast almost every day and avg 24 mpg

 

[CWPspeed3]

I usually stay out of boost because I only drive 6 miles each way to work and get around 22mpg but when I get into it I see spikes to 17-18psi and hold 15psi and it bleeds off to 14psi with a stock bpv.

Is it normal when holding boost for it to go down or is that a symptom of a leaky stock bpv?

 

[UHATEIT]

I usually stay out of boost because I only drive 6 miles each way to work and get around 22mpg but when I get into it I see spikes to 17-18psi and hold 15psi and it bleeds off to 14psi with a stock bpv.

Is it normal when holding boost for it to go down or is that a symptom of a leaky stock bpv?

best guess would be the stock one is not holding properly. I swapped mine and it stays put and does not dwindle down. The only time it fluctuates if from spikes here and there. Its a quick mod that bpv, get r done bro!

 

[Lagg-Alot]

I notice, with the peak hold function on my Prosport boost gauge, that I peak at about 19psi. Only mods to the motor I have is a Cobb SRI and Forge BPV (two shims and blue spring). I've read that normal should be around 15psi. Any thoughts as to why I'm reading 19, other than maybe my boost gauge is F'd up? It reads 21-22 in Hg vacuum during idle, which seems normal. I run 93 octane around here.

Nice huh? (drive2)

 

[john blutarski]

In 5th and 6th at WOT, I usually spike to 19-20 and then it settles at 15-16 right away. I have the Cobb SRI and Forge BPV blue + 2 also.

 

[CWPspeed3]

In 5th and 6th at WOT, I usually spike to 19-20 and then it settles at 15-16 right away. I have the Cobb SRI and Forge BPV blue + 2 also.

Every thread I read gets me closer and closer to buying the forge, which will probably be my next purchase after the wheels I'm trying to save for now.

 

[john blutarski]

Every thread I read gets me closer and closer to buying the forge, which will probably be my next purchase after the wheels I'm trying to save for now.

can't beat it for the price... you'll love it

 

[oskinosmee]

Forge is nice but i think i wanna sell it and get a hks it sounds better

 

[CWPspeed3]

Forge is nice but i think i wanna sell it and get a hks it sounds better

From what I've read the hks has clearance issues with the cobb sri, thats why I didnt get that one. Turbosmart looks real nice but not $320 nice. I'm wondering what cobb is going to come out with, even though anything with their name on it commands a huge price.

 

[Betelgeuse]

Yeah I've only got the SRI and spike to 19psi sometimes. Seems to be just in 5th and 6th though. Some people say the highest they've seen in 2nd is 10psi. I've seen 14psi several times.

I'm glad I'm reading this cause it shows the dh is pretty damn accurate with regards to boost.

 

[lewisb01]

Maybe I should start a separate thread. But what gauges are you guys using and where are you mounting them at.

Yeah I've only got the SRI and spike to 19psi sometimes. Seems to be just in 5th and 6th though. Some people say the highest they've seen in 2nd is 10psi. I've seen 14psi several times.

I'm glad I'm reading this cause it shows the dh is pretty damn accurate with regards to boost.

 

[CWPspeed3]

Maybe I should start a separate thread. But what gauges are you guys using and where are you mounting them at.

I've just got a dash hawk sitting on my steering column.