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

On the road finally. Turbo rebuilt, test run easy on the pedal.

Thread Tools
 
Search this Thread
 
Old Mar 18, 2013 | 04:37 AM
  #1  
-RotorDemon-'s Avatar
Thread Starter
Rotary nut for 15 years.
 
Joined: Dec 2011
Posts: 118
Likes: 2
From: Gresham, OR
On the road finally. Turbo rebuilt, test run easy on the pedal.




Rebuilt the BNR with new parts from G-Popshop. First run was around half throttle open turbo/screamer pipe.


After that I MIG welded a test pipe/cat delete and turned down the boost to 8psi until the Rtek arrives. I might go with 720's rather than 1200cc injectors and bump the fuel pressure up, so 1200's might be a bit high for what I am shooting for.. Only looking for a conservative 300whp.

Here is the DP/TP. 2.5"





8psi roll to 60ish.


Last edited by -RotorDemon-; Mar 18, 2013 at 04:50 AM.
Reply
Old Mar 18, 2013 | 08:13 AM
  #2  
Rob XX 7's Avatar
FC guy
Tenured Member 20 Years
iTrader: (8)
 
Joined: Oct 2002
Posts: 8,713
Likes: 17
From: Long Island, New York
Nice dp

I would not boost AT ALL until you tune, it takes little to go boom
Reply
Old Mar 18, 2013 | 06:52 PM
  #3  
-RotorDemon-'s Avatar
Thread Starter
Rotary nut for 15 years.
 
Joined: Dec 2011
Posts: 118
Likes: 2
From: Gresham, OR
True. I'm not worried at all about popping the motor. Timing is pulled to -10 BTDC and 8PSI is lower than stock boost level. The engine has 5k on it. So for now easy driving other than those videos above. But progress has been made
Reply
Old Mar 18, 2013 | 09:46 PM
  #4  
wthdidusay82's Avatar
Rotary Power
Tenured Member 15 Years
iTrader: (15)
 
Joined: Sep 2004
Posts: 3,706
Likes: 4
From: Dinwiddie, Va
Originally Posted by -RotorDemon-
True. I'm not worried at all about popping the motor. Timing is pulled to -10 BTDC and 8PSI is lower than stock boost level. The engine has 5k on it. So for now easy driving other than those videos above. But progress has been made
8 psi isn't lower than stock boost.

S4 stock boost is 5.5psi

S5 is 7.5 psi

Fuel cut iirc is at 8.5 psi?
Reply
Old Mar 18, 2013 | 11:40 PM
  #5  
-RotorDemon-'s Avatar
Thread Starter
Rotary nut for 15 years.
 
Joined: Dec 2011
Posts: 118
Likes: 2
From: Gresham, OR
Originally Posted by wthdidusay82
8 psi isn't lower than stock boost.

S4 stock boost is 5.5psi

S5 is 7.5 psi

Fuel cut iirc is at 8.5 psi?
You're correct. Not sure why I was thinking 8.5psi was stock and cut was around 9psi.

Last edited by -RotorDemon-; Mar 18, 2013 at 11:44 PM.
Reply
Old Mar 18, 2013 | 11:49 PM
  #6  
MrGoodnight's Avatar
Senior Member
Tenured Member 10 Years
iTrader: (1)
 
Joined: Feb 2010
Posts: 620
Likes: 4
From: Tacoma Washington
Fuel cut is at 8.6 psi.
Reply
Old Mar 19, 2013 | 07:28 AM
  #7  
jackhild59's Avatar
Rotary $ > AMG $
Tenured Member: 20 Years
iTrader: (7)
 
Joined: Apr 2005
Posts: 3,785
Likes: 30
From: And the horse he rode in on...
Originally Posted by wthdidusay82
8 psi isn't lower than stock boost.

S4 stock boost is 5.5psi

S5 is 7.5 psi

Fuel cut iirc is at 8.5 psi?
Originally Posted by NZConvertible
Stock max boost is 6.6psi for S4 and 8.3psi for S5. Neither will hold this all the way to redline though. Both turbos have the same wastegate actuator but the S5 used electronic boost control for faster and higher boost.
.

Originally Posted by NZConvertible
The max boost numbers are as I posted above, both taken straight from the FSM. I have corrected this misinformation dozens of times, but the same mythical numbers keep getting reposted.

And like I just said, they have the same wastegate actuator. The S5's higher boost is from the stock electronic boost control.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
Jul 1, 2023 04:40 PM
dkwasherexd
Single Turbo RX-7's
21
May 27, 2017 04:51 AM
efini7
Test Area 51
1
Sep 4, 2015 02:59 AM




All times are GMT -5. The time now is 01:30 AM.