Stock Boost [Merged 5-7]

[Gs-tHaVoC]

hehe kinda dumb question but whats stock boost on my car? just wondering if its worth it to install a boost controller and gauge without bov thats all. thanx

 

[No_Skillz]

Unnoticeable difference. It's 12 if you have done the BCS free mod.

 

[JayRolla]

Ive owned two tsi's, a 90 and 91. Both had about 8-9psi with all free mods and I was using a real boost guage. Dont know where everyone gets these high numbers. Even my evo3 actuator held at 9psi.

 

[ericmetcalf11]

My stock 90 and my friend's stock 91 both have 11 psi on aftermarket boost guage.
Is there a difference with the auto's since they have a different turbo?

-Eric
no sig

 

[RyanTSi]

90-94's are 7-9 PSi

95-99 is 12-14PSi

That is unmodded. I dont know where everyone is gettin the big numbers for a 1g either.

 

[AWD_Launch]

Mine runs 10-11PSI but that was with the BCS mod done along with an exhaust and filter

 

[CanadianTSi]

Running straight of the wastegate will give you 9psi. Stock or with the BCS mod should be around 10-12.

 

[screwdgie]

back when all i had was a k&n filter, 3" catback, and BCS mod, I was pulling 14-15 psi in my car

 

[flashburn02]

I am running my turbo completely open and it will only push 15 psi. When I put everything back to stock it runs about 12 - 13 peak. I haven't COMPLETELY unloaded it with the turbo fully open but is 15 psi all I should expect out of my t25 for average agressive driving?

Also, what should I expect at the track, 16 psi, maybe 17?

Thanks in advance!

 

[CanadianTSi]

A T-25 will spike to 20+ but will not hold anymore then 12-15 after 5500.

 

[flashburn02]

k thanks!

 

[Phippsp]

I just installed my Autometer boost gauge yesterday and I also did the intake mod with the PVC pipe to allow more air flow in the intake. I idle at about 19 vac and when deccelerating it goes to about 25 vac. But when I get on it and really gun the car my boost gauge shows me running at about 14psi this is when I floor it it won't go higher so im guessing at WOT im at 14psi? I just didn't think a completly stock car would run 14psi stock....

 

[dave99gst]

you guessed right.
and Yeah that is the stock 2g level.

 

[FORMONTOYA]

A stock 2G will spike to 14PSI and then the crappy BOV will allow it to leak down to 11PSI. Your idle/deceleration vacuum is correct also.

The boost numbers aren't the important thing as much as the amount of airflow. T25 = not a lot of airflow, even at 14PSI.

 

[MaxPSITalon]

My talon is at stock boost level and it makes 7 psi. T-25 turbo (stock)

 

[MaxPSITalon]

I have read on other threads people saying there stock DSM makes 14 psi with the t-25. On my 2g Talon the wastegate lines, turbo and the BCM have not been modified.... is it normal to only make 7psi???

 

[FORMONTOYA]

My talon is at stock boost level and it makes 7 psi. T-25 turbo (stock)

Then I would imagine that you have serious boost leaks (or other issues) as it should be hitting 11PSI with a 14PSI spike until the BOV "leaks down" to the 11PSI (on the OEM T25).

 

[FORMONTOYA]

To clairify....that's 14PSI (spike), then the plastic BOV leaks down to 11PSI.

 

[MaxPSITalon]

I have a Greddy RS BOV. I dont have any boost spike. It holds constant at 7 psi in all gears.

 

[CanadianTSi]

Aftermarket boost gauge?

Check for boost leaks.

 

[MaxPSITalon]

yes i have an autometer C2 boost gauge. i will check for a boost leak today and let you know what i find out. how much psi should i be making with a stock setup?

 

[No_Skillz]

Around 10-12 with unmodified BCS.
Around 12-14 with modified BCS.

 

[T is for TURBO]

I hit 16 rock solid all the time after I upgraded to an after market BOV. And that was with OUT the unmodified BCS... I didn't have a boost gauge when I had my 2g bov, so I couldn't tell you what it would hold...
I do belive it depends on altitude, ocatane, and of course, boost leaks.

 

[Phippsp]

Alright well this is what I just did. Before to connect the nylon tube to the back of the gauge I had to use Medical tap and wrap it around the nylon tub to hold it in on the nuts that screwed into the back of the gauge cause I broke the ferrule. But I just went and got a new ferrule reinstalled it and now It will boost at WOT to about 12-13 jump back and forth between those two. And when I let off and slow down it goes to about 23-24 Vac. I am pretty sure my plastic BOV if you even will call it a BOV is leaking like a mofo so once I get to it i'll either get the Greddy Type RS or the 1g BOV for it.

It seems somewhere I lost some pressure going to the gauge mabye the ferrule is to tight on the tube now because before with the medical tape it was holding steady at 14psi. So I think I may of tightened it to much and sqeezed the Ferrule down onto the tube to much?

 

[MaxPSITalon]

i did find a boost leak... now it makes about 10-11 psi. thanks for your help

 

[CanadianTSi]

i did find a boost leak... now it makes about 10-11 psi. thanks for your help

Awesome that someone actually did a boost leak test found the leak and it fixed there problem...Imagine That.