my pte 50 feels like ass!

[dickysi]

I just put on my pte 50 and it hits 15 psi but dosnt put me in my seat, it dosnt feel like i thought it would, with my stock t-25 boosting 15-20 psi it put me in my seat nicely for a little turbo. my volts is a .95 which is good, my car was running a high 13 with the t-25 but now it dosnt feel faster than that still. i just orded the forced performance 4 inch intake to replace my injen because i think it might be starving for more air!!
I bought nothing but the best for my project like full apexi gt dp and exhuast {3.75inch} busher upper pipe, dejon lower, afc 2, pte 680, 255 pump, new bearings and tune up, with a very good compression test.
im not blowing my spark out nor is my timing off so lets hope its the intake starving my turbo from the propper air volume the pipe should be here in 2 days so lets hope that fixes the problem, but if any1 has run into this problem let me no. i will be doing a manifold and gm maf next. Peace dickysi 95 gsx

 

[GSX_RCR]

I'd suggest checking for boost leaks first. How much boost are you running with the new 50? And any "tooning" done to it besides slapping everything on?

 

[dickysi]

Originally posted by GSX_RCR
I'd suggest checking for boost leaks first. How much boost are you running with the new 50? And any "tooning" done to it besides slapping everything on?

no boost leaks and i tuned my fuel and spark, running 15 psi

 

[Mike 99GSX]

Did you datalog it? Where is your AFC set at? Definately check for boost leaks. Your T25 is going to feel a bit punchier at 15 PSI compared to the 50 trim. Once you know everything is OK tuning wise, turn the boost up to 18-19 PSI and get more in the 50 trim's efficiency range. You'll start feeling it then

 

[rdrkt]

Originally posted by dickysi
and i tuned my fuel and spark, running 15 psi

Using what monitoring devices? You arent going to be able to tell shit using an autometer light show gauge as your only monitoring device. You need a datalogger or a scan tool.

 

[92TALONAWD]

Originally posted by Mike 99GSX
Once you know everything is OK tuning wise, turn the boost up to 18-19 PSI and get more in the 50 trim's efficiency range. You'll start feeling it then

Some times people do not realize that with low boost you can be out of the efficiency range of a big turbo. I know that my B16g @ 20#s felt stronger then my 60 trim at the same 20#s. I do not know if it just felt faster or if it really was. Then when I turn the boost up to 25 the 60 trim pulled so much harder then the B16g did at 25#s. So I agree with Mike turn the boost up to 18-20, depending on what octane gas you can get, and tune away.


Good Luck, Matt

 

[kpt4321]

Check for boost leaks, turn the boost up, and tune it.

 

[Mike 99GSX]

It seems to also be a trend I'm noticing with people who are going right to 50 trims from T25s without the typical 16g "inbetween" choice. The T25 just spools up so fast that the initial surge can just be perceived as hitting harder.

 

[dickysi]

Originally posted by 92TALONAWD
Some times people do not realize that with low boost you can be out of the efficiency range of a big turbo. I know that my B16g @ 20#s felt stronger then my 60 trim at the same 20#s. I do not know if it just felt faster or if it really was. Then when I turn the boost up to 25 the 60 trim pulled so much harder then the B16g did at 25#s. So I agree with Mike turn the boost up to 18-20, depending on what octane gas you can get, and tune away.


Good Luck, Matt

thanks guys ill turn up the boost today and let you know , peace

 

[GSX]

Originally posted by dickysi
I just put on my pte 50 and it hits 15 psi but dosnt put me in my seat, it dosnt feel like i thought it would, with my stock t-25 boosting 15-20 psi it put me in my seat nicely for a little turbo. my volts is a .95 which is good, my car was running a high 13 with the t-25 but now it dosnt feel faster than that still.

"Tooning" dude! If your .95 is referring to your front O2 then you are way outta tune [aka rich] - especially on a 1G since I've heard .89 is a nice place to be versus .92 on a 2G. And if you are way outta tune, your car will feel like as slow as a slug.

Don't know your personal history with cars but it is important to understand the concept behind forced induction setups - took me a while I'll admit. Based on my perception, it sounds like you went from a stock car with a boost controller to a big turbo setup with all the accessories [injectors, pump, etc] without understanding how important a proper tune is. If I'm wrong, I apologize.

Take the others' adice, check for boost leaks, then read up some more, and lastly tune with a logger.

Note, 15 psi on a semi-tuned car w/ a 50 trim is still impressive no matter how you cut it. Best of luck.

 

[Sephroth57]

definately sounds like a tuning problem, like has been said if you have a logger and are tuning it correctly then sorry, but chances are if youre posting here you probably dont . get a datalogger, learn how to tune that thing, and put it in its most effecient range which is probably 18PSI +

 

[nanokpsi]

First and for most, you can't tune with front o2s alone. Actually, I don't think they should be used at all with any set up to tune. The stock sensor is only good for reading around stochiometric and is useless at other ranges.

The t25 will probably feel faster only because it spools sooner and is torquey down low. At redline the difference should be huge since the t25 really won't hold more than 11 psi. At 13 psi with bpu mods and fuel, I was dead even with my buddies evo. Now, with a big fmic, 20 psi, and cams he doesn't want to race again.

Either borrow a logger and have it tuned on a dyno.

 

[JZ 97 SS 1500]

That SC50 will really haul once you turn the boost up. Right now with 15psi and the PR your at, the turbo maybe be below its efficiency range. As you turn the boost up the efficiency of that turbo will climb and you will definitely fell the difference.

Jose

 

[dickysi]

I TURNED THE BOOST UP TO 20 PSI AND TURNED MY FUEL DOWN SO I WAS RUNNING A .93-.94 VOLTS, THE CAR RIPS ALOT HARDER. THANKS GUYS!!!! I LOOK INTO THE DATALOGGER

 

[ITSME4G63]

damn, just wait till you turn it up to 25-30psi, can u say, huge smile!!

 

[candela]

Oh dear.... be careful my friend..

GSX/Pete- nice to see you back... oh and I have ALWAYS been a long time admirer of the car.

 

[DSMJim]

Originally posted by GSX
[BNote, 15 psi on a semi-tuned car w/ a 50 trim is still impressive no matter how you cut it. Best of luck. [/B]

You definately have a tuning problem because I ran 13.4 at 15psi in my car and the car feels way faster than my T-25 did (15psi in my T-25 netted 14.6)

You say no boost leaks, have you checked it by pressure testing the intake? If you have not, then you don't know. I said no boost leaks because I tightened down my clamps and could not have possibly had leaks. Well guess what, I had leaks and my car was way faster afterwards.

Basically if it feels like arse then there is a problem. Go over everything again. It should and will feel faster when it's running properly.

 

[1fast97gsx]

Its your fuel mag ... it's prolly got a nasty hole. Jessie knows some dude that had a similar problem. All you have to do is tune the nawz timer another millisecond and you'll run 9zzzzz

 

[candela]

Its your fuel mag ... it's prolly got a nasty hole. Jessie knows some dude that had a similar problem. All you have to do is tune the nawz timer another millisecond and you'll run 9zzzzz

Good thing we have you here

 

[GSntncT]

Originally posted by dickysi
I TURNED THE BOOST UP TO 20 PSI AND TURNED MY FUEL DOWN SO I WAS RUNNING A .93-.94 VOLTS, THE CAR RIPS ALOT HARDER. THANKS GUYS!!!! I LOOK INTO THE DATALOGGER

That's great. Because as it was mentioned before, 15 psi is too low for something like a 50. I started off at 16 for my 56 trim, and I thought I was going to die from boredom :laugh:. Yeah, just wait till you get into the 23+ range, that's where the fun really begins.

 

[Tallen]

Yup, you can't expect a big turbo like that to be efficient at 15psi. Glad to hear you solved the problem.

 

[1fast97gsx]

Originally posted by candela
Good thing we have you here

heheh ... gotta have a little fast and the furious humor :laugh:

 

[herostar]

dont' run too much boost on that stock SMIC though... get a FMIC and a tune at 20+ psi and it'll be hella fast

 

[dickysi]

whats up guys i got my forced performance 4 inch intake today with my 5 inch filter and the car feels awsome. i had to turn the boost down to 15 psi caus my clutch is smooked!! but at 15 psi it feels much better than it had at the other 15 psi with the old intake pipe. i got a act 2600 with street disc today aswell and will have that in on thrusday, let it beak in for a few and them im going to hit the dyno at turbo trix!
later tuners~

 

[lowridin2g]

IMO u need to go to that "in between yurbo" first to get tuning experience. or you will be lost. i just upgraded from my big16g to a 50 trim and it took alot of tuning to make it fatser than it was with the big16g. im still working on tuning it up at 22 psi now