2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

18 psi on a stock turbo?????

Thread Tools
 
Search this Thread
 
Old 10-17-08, 05:53 PM
  #26  
Banned. I got OWNED!!!
iTrader: (11)
 
stevensimon's Avatar
 
Join Date: Aug 2003
Location: salt lake ut
Posts: 3,575
Likes: 0
Received 5 Likes on 5 Posts
is there much more you can do to an s5 wg? i agree though. 18psi is too much. you arent gaining any power just a bigger chance of detonation. detonation is rotary speak for death.
Old 10-17-08, 06:01 PM
  #27  
Who Shot the Sheriff?

iTrader: (2)
 
Turbo II Rotor's Avatar
 
Join Date: Jan 2007
Location: Aurora, CO
Posts: 3,858
Likes: 0
Received 1 Like on 1 Post
Originally Posted by myersprostatus
LOL 19PSI ON A STOCK TURBO HAHAHHAA.

18psi+stock injectors+stockregulator=KABOOOOOOOOOOOOOOM

i find it very hard to beleive that your motor still runs if it went up to 18psi
He has an aftermarket ecu and doesn't know if his injectors are stock. Reading comprehension.
Old 10-17-08, 07:38 PM
  #28  
#FakeCarEnthusaist

iTrader: (10)
 
Brody8877's Avatar
 
Join Date: Sep 2005
Location: San Francisco
Posts: 1,814
Received 9 Likes on 9 Posts
wtf is that is even possible 18psi on stock turbo O_o

im surprise your motor hasn't blown yet.
Old 10-17-08, 09:54 PM
  #29  
Full Member

Thread Starter
 
h_block88's Avatar
 
Join Date: Sep 2008
Location: carteret nj
Posts: 235
Likes: 0
Received 0 Likes on 0 Posts
ok i just went back to the guy who i bought then car from and i got the injectors that spouse to be ecu set for now they are 1200cc on top and stock rebuild one on the bottom and it a tuned jdm spec j ecu dont no whats the chip in it

Originally Posted by Turbo II Rotor
He has an aftermarket ecu and doesn't know if his injectors are stock. Reading comprehension.
Old 10-17-08, 09:59 PM
  #30  
Full Member

Thread Starter
 
h_block88's Avatar
 
Join Date: Sep 2008
Location: carteret nj
Posts: 235
Likes: 0
Received 0 Likes on 0 Posts
not sure if its stock turbo tough? i mean its stock but turbine on it doesnt look stock looks like my 60 trim one on my t04e
Old 10-18-08, 02:00 AM
  #31  
Senior Member

iTrader: (1)
 
fcdin's Avatar
 
Join Date: Jan 2007
Location: Little Canada, Minnesota
Posts: 405
Likes: 0
Received 0 Likes on 0 Posts
I dont mean to thread jack but yeah. When I first swap my Tii in (3' dp RB etc, N374 with knight sport chip. I loved the boost and kept flooring it. Didnt know I boosted 15-18 lbs until I got a boost gauge. I even did it after I learned about running lean at high psi with stock injectors. I just couldnt help it when a Honda pulled up. But it still made 3 round trips to MN and IA (about 3-4 hours each way). But it does idle weird now but boost still comes in really good.
Old 10-18-08, 02:04 AM
  #32  
I

iTrader: (3)
 
epic's Avatar
 
Join Date: Nov 2006
Location: los angeles
Posts: 374
Likes: 0
Received 0 Likes on 0 Posts
10-12 should b norm. 18 ........wow....2much hot air. let me know when the engine blows
Old 10-18-08, 10:35 AM
  #33  
Engine, Not Motor

iTrader: (1)
 
Aaron Cake's Avatar
 
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 110 Likes on 93 Posts
Originally Posted by stylEmon
actually aaron, I've seen a S4 log manifold mod'd for an external wastegate!! ;P
It wasn't terribly cost retarded, but I think I'd just upgrade at that point LOL
Well yes, but that doesn't exactly translate to modding the stock internal wastegate as posted.
Old 10-18-08, 11:23 AM
  #34  
torretos stunt double

iTrader: (2)
 
myersprostatus's Avatar
 
Join Date: Jun 2007
Location: fountain valley
Posts: 608
Likes: 0
Received 0 Likes on 0 Posts
maybe its a BNR
Old 10-18-08, 01:16 PM
  #35  
Full Member

Thread Starter
 
h_block88's Avatar
 
Join Date: Sep 2008
Location: carteret nj
Posts: 235
Likes: 0
Received 0 Likes on 0 Posts
ok top is 1200cc rc injetors stock ones on the bottom >??
dont i need a higher one on the botom too???
Old 10-18-08, 01:22 PM
  #36  
Who Shot the Sheriff?

iTrader: (2)
 
Turbo II Rotor's Avatar
 
Join Date: Jan 2007
Location: Aurora, CO
Posts: 3,858
Likes: 0
Received 1 Like on 1 Post
Not if your computer is programed to run on that combo.
Old 10-19-08, 12:37 PM
  #37  
FC since 99

iTrader: (2)
 
stylEmon's Avatar
 
Join Date: Feb 2006
Location: PHL
Posts: 2,712
Likes: 0
Received 2 Likes on 2 Posts
Well yes, but that doesn't exactly translate to modding the stock internal wastegate as posted
true , true. Just thought I'd share. It was an interesting "mod".
Old 10-19-08, 12:54 PM
  #38  
Saiga-12 Power!

iTrader: (4)
 
Juiceh's Avatar
 
Join Date: Oct 2004
Location: N of Chicago
Posts: 4,384
Likes: 0
Received 0 Likes on 0 Posts
Holy **** this thread of full of failed reading comprehension... The guys said he has upgraded ecu(probably chipped SPECIFICALLY TO RUN THIS SETUP), injectors, and turbo, yet people still say OMG 18 PSI on all stock stuff say bye bye engine!!!

READ DAMNIT PEOPLE!
Old 10-19-08, 01:06 PM
  #39  
Who Shot the Sheriff?

iTrader: (2)
 
Turbo II Rotor's Avatar
 
Join Date: Jan 2007
Location: Aurora, CO
Posts: 3,858
Likes: 0
Received 1 Like on 1 Post
Originally Posted by h_block88
not sure if its stock turbo tough? i mean its stock but turbine on it doesnt look stock looks like my 60 trim one on my t04e
Does it look like any of these?

http://bnrturbos.com/2ndGen.htm
Old 10-19-08, 03:55 PM
  #40  
rx7parts

iTrader: (27)
 
2-N-D-pink's Avatar
 
Join Date: Mar 2006
Location: florida
Posts: 559
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by stevensimon
is there much more you can do to an s5 wg? i agree though. 18psi is too much. you arent gaining any power just a bigger chance of detonation. detonation is rotary speak for death.
Heres what I did to try and not over boost. Completely removed the internal gate and flapper door. Made the hole bigger, and put a Tial 38mm.
I still over boost. I dont think there's much you can do if you have a free flow exhaust. I even have some plates in my exhaust for some back pressure....Still not enough.

<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view&current=100_2220.jpg" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/100_2220.jpg" border="0" alt="Photobucket"></a>
<br>
<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view&current=100_2221.jpg" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/100_2221.jpg" border="0" alt="Photobucket"></a>
<br>



Flange side...
<br>
<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view&current=100_2222.jpg" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/100_2222.jpg" border="0" alt="Photobucket"></a>
<br>
<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view&current=100_2218.jpg" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/100_2218.jpg" border="0" alt="Photobucket"></a>
<br>
<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view&current=100_2225.jpg" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/100_2225.jpg" border="0" alt="Photobucket"></a>
<br>
open wastegate....
Old 10-19-08, 07:29 PM
  #41  
Full Member

Thread Starter
 
h_block88's Avatar
 
Join Date: Sep 2008
Location: carteret nj
Posts: 235
Likes: 0
Received 0 Likes on 0 Posts
wow that come out really nice. good job
Old 10-19-08, 08:34 PM
  #42  
destroy, rebuild, repeat
iTrader: (1)
 
gxl90rx7's Avatar
 
Join Date: May 2004
Location: Charleston, SC
Posts: 2,990
Likes: 0
Received 16 Likes on 14 Posts
Originally Posted by 2-N-D-pink
Heres what I did to try and not over boost. Completely removed the internal gate and flapper door. Made the hole bigger, and put a Tial 38mm.
I still over boost. I dont think there's much you can do if you have a free flow exhaust. I even have some plates in my exhaust for some back pressure....Still not enough
you still creep?? how do BNRs do it with a 35mm port? i have no creep at all, 3" exhaust, 5.5psi steady
Old 10-20-08, 01:21 AM
  #43  
Top Down, Boost Up

iTrader: (7)
 
RotaryRocket88's Avatar
 
Join Date: Mar 2008
Location: San Diego, CA
Posts: 8,718
Likes: 0
Received 6 Likes on 4 Posts
I've got my S5 turbo ported to the equivalent area of a single 35mm, and I have no creep at all. 2.5+" open exhaust system. Without my MBC, it runs exactly 5.5-6PSI max in 4th/5th gear.

2ndpink, those giant, rough ports have got to be causing all sorts of turbulence in the exhaust gas flow both through the wastegate and through the turbine. I wouldn't be surprised if your spool times are longer than with the stock setup. This could also be enough to restrict flow out of the external wastegate, which would explain why you still have creep at 38mm. As is, that whole semi-square chamber you created allows exhaust gas to flow back and forth between the 2 halves of the exhaust manifold, and the path isn't smooth. That kind of setup would probably work better on a S4 turbo (1 wg port), but smoothing things out / reducing the open space should help too.
Old 10-20-08, 04:24 PM
  #44  
Boost ahoy!

 
CyberPitz's Avatar
 
Join Date: Jan 2006
Location: Joplin, MO
Posts: 968
Likes: 0
Received 0 Likes on 0 Posts
This thread has convinced me to get a BNR Stage 1 instead of porting my WG. It will solve my exhaust leak *when I put the new gasket on* and the random smoke that puffs out under boost, and the coolant leak. WOOO.
Old 10-20-08, 05:38 PM
  #45  
pwned

 
dean23's Avatar
 
Join Date: Sep 2005
Location: Northern Indiana
Posts: 1,296
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by RotaryRocket88
2ndpink, those giant, rough ports have got to be causing all sorts of turbulence in the exhaust gas flow both through the wastegate and through the turbine. I wouldn't be surprised if your spool times are longer than with the stock setup. This could also be enough to restrict flow out of the external wastegate, which would explain why you still have creep at 38mm. As is, that whole semi-square chamber you created allows exhaust gas to flow back and forth between the 2 halves of the exhaust manifold, and the path isn't smooth. That kind of setup would probably work better on a S4 turbo (1 wg port), but smoothing things out / reducing the open space should help too.
harrrsh. but true.

my exhaust size is ported as much as it could be and in combo with a 3" turbo back and highflow cat/muflers i get no spikes or overboosting. partly because my flapper door pushrod was disconnected for a few weeks. and i wondered why it hit 10 at 5500 hahaha
Old 10-21-08, 07:44 PM
  #46  
rx7parts

iTrader: (27)
 
2-N-D-pink's Avatar
 
Join Date: Mar 2006
Location: florida
Posts: 559
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by RotaryRocket88
I've got my S5 turbo ported to the equivalent area of a single 35mm, and I have no creep at all. 2.5+" open exhaust system. Without my MBC, it runs exactly 5.5-6PSI max in 4th/5th gear.

2ndpink, those giant, rough ports have got to be causing all sorts of turbulence in the exhaust gas flow both through the wastegate and through the turbine. I wouldn't be surprised if your spool times are longer than with the stock setup. This could also be enough to restrict flow out of the external wastegate, which would explain why you still have creep at 38mm. As is, that whole semi-square chamber you created allows exhaust gas to flow back and forth between the 2 halves of the exhaust manifold, and the path isn't smooth. That kind of setup would probably work better on a S4 turbo (1 wg port), but smoothing things out / reducing the open space should help too.

Its a 3" Down Pipe and exhaust. No cats. Also, my mistake on the "still not enough" I have a .9 bar spring (13psi) and boost happens fast! Kinda hard to drive on low throttle and stay below 1 or 2 psi (so the gate doesnt start to open and sound retarded loud)

Another thing, after the slits were on the exhaust will not pass 7 psi after 6,500 RPMs.


Originally Posted by gxl90rx7
you still creep?? how do BNRs do it with a 35mm port? i have no creep at all, 3" exhaust, 5.5psi steady
Again. My mistake.
Old 10-21-08, 07:56 PM
  #47  
F**K THE SYSTEM!!

 
junito1's Avatar
 
Join Date: Sep 2006
Location: Florida
Posts: 2,586
Likes: 0
Received 1 Like on 1 Post
I have full 3 inch exhaust. On the stock turbo in 3rd n + gears it creep to 9 psi.

I have a BNR stg4 boost controller off. 6 psi steady in all gears.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
dkwasherexd
Single Turbo RX-7's
21
05-27-17 04:51 AM



Quick Reply: 18 psi on a stock turbo?????



All times are GMT -5. The time now is 04:20 PM.