T25 Wastegate on 12psi.... - SR20 Forum
 
Thread Tools
#1 (permalink) Old 03-29-2005, 12:03 AM
Mr.200SX @ the dash
 
Join Date: Aug 2003
Location: Atlanta, GA
Posts: 1,679
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 35 reviews
(Thread Starter)
T25 Wastegate on 12psi....

I was told by a respectable and known tech and fabricator that our T25 wastegates can't hold more than 10-11bls of boost since the hole is not big enough. I was wondering if any of you guys can prove this wrong. I currently have the T25 setup with the Greddy Profec B boost controller and it seems that my setup is having trouble holding 12lbs and on top of that there are about 2 or 3 more guys in the area in the same situation. All comments are welcome.

"IF YOU AINT 1ST YOU'RE LAST"
JGsnismoser is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 03-29-2005, 12:12 AM
Enjoy the GTR Matt!
 
Join Date: Sep 2003
Location: SE
Posts: 3,716
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 23 reviews
Sure, I can prove it wrong.. 17.5lbs max boost, and I can run all day long at 14psi.

Blitz Type R dual stage boost controller.

Sweet '93 NX DE+T GT28RS- For Sale
R0b_ is offline  
#3 (permalink) Old 03-29-2005, 12:14 AM
Nerdy Dirty Asian
 
Join Date: Feb 2005
Location: VA
Posts: 833
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 5 reviews
Quote:
Originally Posted by JGsnismoser
I was told by a respectable and known tech and fabricator that our T25 wastegates can't hold more than 10-11bls of boost since the hole is not big enough. I was wondering if any of you guys can prove this wrong. I currently have the T25 setup with the Greddy Profec B boost controller and it seems that my setup is having trouble holding 12lbs and on top of that there are about 2 or 3 more guys in the area in the same situation. All comments are welcome.
sometimes i hit 14-15psi in 4th or 5th gear...
i have a bb sr20det w/ z32, 72lbs inj., jgy fuel rail, jwt ecu,man boost controller, on stock wastegate.
BUT, my car is currently idling like crap(vacuum at 10-12 during idle) and i have some boost leak problems.
purekoryo is offline  
#4 (permalink) Old 03-29-2005, 12:39 AM
Honda smells > My Nissan
 
Join Date: Jul 2003
Location: Oakland, PA
Posts: 909
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by R0b_
Sure, I can prove it wrong.. 17.5lbs max boost, and I can run all day long at 14psi.

Blitz Type R dual stage boost controller.

man at 17 psi you are throwing nothing but heat back into your motor, way past the efficiency range. even 14psi is alot for the little guy.

B14 w/ 2 broken motors and no more T25

Sorry I am no longer taking orders for intercooler piping or exhausts.

I miss my car.
crudinyourface is offline  
#5 (permalink) Old 03-29-2005, 12:40 AM
SE-R Lightweight
 
Join Date: May 2004
Location: Marietta, GA
Posts: 364
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
The guy who told you that isn't really a tuner...

He just welds.

I'm pretty confident it holds 14-15 psi. But then again I'm a n00b.

1992 se-r
13.9@108
13.5@106
Yes, I know I can't drive.
HalfBaked is offline  
#6 (permalink) Old 03-29-2005, 12:48 AM
Honda smells > My Nissan
 
Join Date: Jul 2003
Location: Oakland, PA
Posts: 909
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by HalfBaked
The guy who told you that isn't really a tuner...

He just welds.

I'm pretty confident it holds 14-15 psi. But then again I'm a n00b.
I never said it wont hold the boost, I just made the comment its too much for a T25. Sorry I forgot I wasnt a tuner, those compressor maps must lie

B14 w/ 2 broken motors and no more T25

Sorry I am no longer taking orders for intercooler piping or exhausts.

I miss my car.
crudinyourface is offline  
#7 (permalink) Old 03-29-2005, 12:57 AM
Sucks gas but kicks ass
 
Join Date: Jan 2003
Location: ate-0h-8 state
Posts: 3,442
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
read the sig.. 11psi all day everyday! holds strong in all gears

Missing my sr20 b14, but still showing some love. Possible new project when I return!
Old car: 1999 Sentra SE-L Turbo: USDM sr20de, t25 turbo, hot shot intercooler kit, BIG ass fmic, nismo fpr, autometer fp gauge/boost gauge, mbc set at stock boost for now! 7psi= more traction>11psi=less traction.
sr20det808 is offline  
#8 (permalink) Old 03-29-2005, 01:58 AM
sleeper
 
Join Date: Mar 2001
Location: Hermosa Beach, CA
Posts: 5,445
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
Quote:
Originally Posted by JGsnismoser
I was told by a respectable and known tech and fabricator that our T25 wastegates can't hold more than 10-11bls of boost since the hole is not big enough. I was wondering if any of you guys can prove this wrong.
Uh... yeah... if the hole were too small, it'd build MORE boost! Think about it. The hole is used to bypass air around the turbine wheel and not through it. The bigger the hole, the more is bypassed, the less goes through the turbine wheel, the less boost.

My boost pressure drops down to about 9-10 psi by redline because I'm trying to push 260whp through the poor little sucker

Khiem
'96 SE-R.... boost, brakes, suspension, etc... sold
'05 Evo
'05 CBR 600RR
spdracerUT is offline  
#9 (permalink) Old 03-29-2005, 02:02 AM
SE-R Lightweight
 
Join Date: May 2004
Location: Marietta, GA
Posts: 364
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by crudinyourface
I never said it wont hold the boost, I just made the comment its too much for a T25. Sorry I forgot I wasnt a tuner, those compressor maps must lie

I'm not talking about you.

I meant the guy who told the thread starter.

1992 se-r
13.9@108
13.5@106
Yes, I know I can't drive.
HalfBaked is offline  
#10 (permalink) Old 03-29-2005, 02:45 AM
Enjoy the GTR Matt!
 
Join Date: Sep 2003
Location: SE
Posts: 3,716
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 23 reviews
Quote:
Originally Posted by crudinyourface
man at 17 psi you are throwing nothing but heat back into your motor, way past the efficiency range. even 14psi is alot for the little guy.
Not when you have a T3 wheel installed!

Sweet '93 NX DE+T GT28RS- For Sale
R0b_ is offline  
#11 (permalink) Old 03-29-2005, 10:58 AM
Honda smells > My Nissan
 
Join Date: Jul 2003
Location: Oakland, PA
Posts: 909
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by HalfBaked
I'm not talking about you.

I meant the guy who told the thread starter.
Understood

B14 w/ 2 broken motors and no more T25

Sorry I am no longer taking orders for intercooler piping or exhausts.

I miss my car.
crudinyourface is offline  
#12 (permalink) Old 03-29-2005, 10:58 AM
Honda smells > My Nissan
 
Join Date: Jul 2003
Location: Oakland, PA
Posts: 909
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by R0b_
Not when you have a T3 wheel installed!

Ahh the t28 hybrid, I missed that. Right on bud.

B14 w/ 2 broken motors and no more T25

Sorry I am no longer taking orders for intercooler piping or exhausts.

I miss my car.
crudinyourface is offline  
#13 (permalink) Old 03-29-2005, 07:11 PM
Import Tech.
 
Join Date: Jun 2002
Location: Portland Or.
Posts: 1,131
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
We ran 13 lbs on our T25 , with no boost controler , did the old turnbuckle setup , some reason that was the only way we could get stable boost with the exhaust off ....with a boost controler , the boost would just go crazy , way high, either 7lbs or 20 .... once we did the turnbuckle and removed the boost controler, we could get a stable 13 lbs ... but really couldnt get much more than that ...

SHAWN
Ger-Brock Performance
Portland OR.
'93 Altima SE 5spd. 13.97 @ 97.6 MPH All Motor !!
'98 Sentra SE.. Time Attack
'06 Pathfinder SE
'93 Infiniti G20 5spd.
13.08@107 MPH SR20DET T25 TMIC..
12.06@119 Built DET,T3/T04e/FMIC ....
My Nissan Site !!
SHAWNATGERBROCK is offline  
Sponsored Links
Advertisement
 
Reply

  SR20 Forum > Main Forums > Turbo


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome