2nd Generation Specific 1986-1992 Discussion

Turbo Isn't Boosting Properly

Thread Tools
 
Search this Thread
 
Old 07-28-2003, 12:37 AM
  #1  
Senior Member
Thread Starter
 
rmaiersg's Avatar
 
Join Date: Aug 2002
Location: One hour north of chicago (Mundelein to be exact)
Posts: 811
Default

Okay so I finished the FMIC. While cruising i noticed that the turbo boosted like 10 psi but after a few seconds it dropped to 8. What's up with that? It needs a rebuild soon. But before the FMIC it was making like 10-15 psi.
rmaiersg is offline  
Old 07-28-2003, 12:55 AM
  #2  
Senior Member
 
Leetheslacker's Avatar
 
Join Date: Nov 2002
Location: Cincinnati, Oh hi hoe!
Posts: 2,286
Default

Gotta leak somewhere?
Leetheslacker is offline  
Old 07-28-2003, 01:24 AM
  #3  
Senior Member
 
FrestyleFC3S's Avatar
 
Join Date: Apr 2003
Location: Schofield Barracks, HI
Posts: 2,259
Default

lee...gotta means got to....got a means have a



get it right



and yea it sounds like it could be a leak somewhere but thats weird to go up and then down



btw ---- you have any news on that short shifter i asked about a whileeee ago
FrestyleFC3S is offline  
Old 07-28-2003, 01:58 AM
  #4  
Senior Member
 
1Revvin7's Avatar
 
Join Date: Oct 2001
Location: Peoria, AZ
Posts: 10,906
Default

Up and Down indicates a boost leak.
1Revvin7 is offline  
Old 07-28-2003, 02:26 PM
  #5  
Senior Member
Thread Starter
 
rmaiersg's Avatar
 
Join Date: Aug 2002
Location: One hour north of chicago (Mundelein to be exact)
Posts: 811
Default

Okay, I shall inspect the tubing this evening.



Thanks
rmaiersg is offline  
Old 07-28-2003, 02:28 PM
  #6  
Super Moderator
 
vosko's Avatar
 
Join Date: Jul 2001
Location: NJ
Posts: 17,839
Default

you will notice pressure drop from your FMIC in other words. turbo puts out 10 psi but when it gets to the manifold you are down to 6-8 psi..... it doesn't matter on large turbos but the top mount was there for a reason no pressure drop
vosko is offline  
Old 07-28-2003, 03:05 PM
  #7  
Senior Member
 
UniqueTII's Avatar
 
Join Date: Nov 2001
Location: Ames, IA
Posts: 4,773
Default

Yeah, the stock turbo can't fill up a larger IC very well.
UniqueTII is offline  
Old 07-28-2003, 04:05 PM
  #8  
Senior Member
 
j9fd3s's Avatar
 
Join Date: May 2002
Location: California
Posts: 22,465
Default

yah if it had a boost leak and the stock ecu it woudnt idle either, i like voskos answer



mike
j9fd3s is offline  
Old 07-28-2003, 06:27 PM
  #9  
Senior Member
Thread Starter
 
rmaiersg's Avatar
 
Join Date: Aug 2002
Location: One hour north of chicago (Mundelein to be exact)
Posts: 811
Default

That makes more sense. The air is cooler so it has less pressure correct?
rmaiersg is offline  
Old 07-28-2003, 06:43 PM
  #10  
Super Moderator
 
vosko's Avatar
 
Join Date: Jul 2001
Location: NJ
Posts: 17,839
Default

actually colder air is denser so it would have more pressure
vosko is offline  


Quick Reply: Turbo Isn't Boosting Properly



All times are GMT -5. The time now is 07:04 AM.