Why does my t-25 push 16 with no boost controller or free mod

[bob123131]

So i bought my car and it had full apexi n1 new clutch and injen intake. I have since then got greddy pipes and front mount, greddy type s bov, autometer gauges, short shifter blaw blaw blaw. I have not done any of the free mods. So i just put on my gauges and im running 15 psi exactly which suggested to me my car might have a boost controller on it. The guy i bought it from didnt really no what he was talking about just some rich kid who had his stuff done proffesionally. Also my a pillar was screwed not clipped originally which suggested there might have been gauges too. I looked and had no luck with finding boost controller. I would normally be happy with having 15 psi but th problem is it creeps to 16 and even 17 once and awhile. Anyone got ideas on what the hell my car is doing. 99 percent sure the kid could not have done boost solenoid mod. He didint even know what a bov was when i talked to him.

 

[crunchymilk]

Sounds like a bad case of boost creep. I wonder if the previous owner did any portwork? What turbo? I ran as high as 16psi with an intake and exhaust so it's definitely possible. Look into a fuel pump at least for now to not run too lean. Your wastegate may not be opening all the way. Also, make sure the line that goes to the wastegate arm isn't pinched off somewhere.

 

[eclipse2gsx]

Since stock boost normally runs around 11psi and you're running 15psi with no boost controller that would tell me they adjusted the wastegate actuater to open at 15psi. Also like crunchy stated the reason it spikes up at times could be the factor of boost creep being involved. Hope this helps!

Jeff

 

[oldman]

A defective bcs bleeding off too much air will result in an unusual higher boost level.

 

[flinguist]

That Greddy BOV, and hard IC piping will increase your boost level too.

 

[Flash]

Since stock boost normally runs around 11psi and you're running 15psi

Stock boost is 14 PSI on a 2g.

 

[eclipse2gsx]

Stock boost is 14 PSI on a 2g.

Thanks for clearin that up for me. I was told it was 11psi just like the 1g's. One more thing though can you explain this: Since the 2g's are running more boost then the 1g's stock, why are the 1g's faster then the 2g's

-Jeff

 

[oldman]

Stock boost is 14 PSI on a 2g.

I wouldn't say that exactly, 14psi is probably in the upper range of what has been reported. Most I have seen are between 10-12 psi.

 

[jim97gst]

If you pick up a 2G factory manual, it will tell you that when testing boost pressure, it should read between 6.4 and 14.7 psi. Pretty big range. I guess Mitsubishi knew how sucky, leaky, and inconsistent the stock BOV is. I got lucky and had one of the 14.7 psi from the factory cars. Exhuast, UICP, and 1G BOV and I too am at 16 or so psi.

Since the 2g's are running more boost then the 1g's stock, why are the 1g's faster then the 2g's

Boost pressure is just one part of the equation. The 14B flows more air than the T25 at the same pressure.

 

[oldman]

Boost pressure is just one part of the equation. The 14B flows more air than the T25 at the same pressure.

That depends on the boost level. When it's within both turbo's efficiency range like 12psi, the difference in air flow is probably minimal at best. If you're talking about 18psi then the difference will become more apparent due to T25 running out of breath and blowing hot air.

 

[Flash]

One more thing though can you explain this: Since the 2g's are running more boost then the 1g's stock, why are the 1g's faster then the 2g's

You have it all wrong you guys. He obviously said that because he wanted to pick a fight. I hope he knows that I'm a huge E-Thug! Look out!

 

[Thomas91169]

bolt on mods like a exhaust, intake, bov and hard pipes will allow the t25 to breathe more freely and get that air into the engine more efficiently.

just slapping on the greddy-s on my t25 i went from 12 to 14psi, because the stock 2g bov leaks anything after 12psi. then slapping on the 3" catback allowed it to now peak 15psi and stay there till redline.

and a 1g is faster than a 2g cause the 1g comes with the 14b, which flows almost double the amount of air at the same boost levels as the peuny t25. but people who bought a 1g new complained about the lag, so the redesigned 2g saw a quicker spooling turbo to please the yuppies, but with a quicker spooling turbo comes less top end and airflow, since it maxed itself out at 5500rpm.

 

[oldman]

and a 1g is faster than a 2g cause the 1g comes with the 14b, which flows almost double the amount of air at the same boost levels as the peuny t25.

pv=nrt => p=pressure, v=volume, n=number of molecules, r=contant, t=temperature

Let's move the equation around

n=pv/rt

Assuming your statement is true that T25 flows n and 14b flows 2n, given that pressure, volume and r are constant.

2*(pv/rt1)=pv/rt2 t1=intake temp of T25 and t2= intake temp of 14b

2/t1=1/t2 or t1/2=t2

For your statement to be true, the intake temp of the T25 (t1), will have to be twice that of the 14b (t2). Do you think that is possible?

 

[talonTSIDriver]

I think i need to clear this up, a STOCK 1g is NOT faster than a STOCK 2g. Stock 1g HP is 195 and a stock 2g is 210. But if you mod the car, a 1g is capable of being faster for less money because if the 14b turbo.

 

[truwarrior]

Do you have a cat on your car? If not it's probably just the t25 creeping. No worries. Maybe if it was going up to 20, that would kinda blow.

 

[dyablo]

Umm... I run around 15psi most of the time and peak some times to 19-20 with just Blitz BOV, no cat, muffler, injen intake. I know that anything above like 15 isnt doing any better for my t-25 but i have been told that i dont need to worry about a boost controler. I have been running like this for a year and no problems that i can notice.

 

[beatshack]

I think i need to clear this up, a STOCK 1g is NOT faster than a STOCK 2g. Stock 1g HP is 195 and a stock 2g is 210. But if you mod the car, a 1g is capable of being faster for less money because if the 14b turbo.

my fwd 1g weighs 2750 lbs (weighed at a weigh station) not including driver, but with nothing removed. the claimed 15 crank hp won't make as much of a difference as 500 pounds will.

i checked, and according to edmunds.com (which might be wrong) the talons keep getting heavier and heavier with every gen.. assuming we're talking awd: (90 and 91 the lightest, 92 to 94 a bit heavier, 95 to 99 even heavier) etc.. i might be wrong, but i'm curious to know what the weights of each gen of car are.

 

[FORMONTOYA]

Stock boost is 14 PSI on a 2g.

and the stock bov leaks at 11psi. after cone filter and cat back mine would spike to 15psi and then leak (through the bov) down to 11psi. have since solved that problem.

jim