 Boost vs. Vacuum |
  |
 May 30 2006, 08:35 AM
Post
#1
|
|
|
Web Administrator Yo!  Group: Admin Posts: 516 Joined: 30-August 04 From: Mackinaw, IL Member No.: 376  |
Got a quick question for y'all.
I need to rework my upper IC pipe after an engine swap. The shortblock was used but just to be gentle I wanted to give it a few miles naturally aspirated. I disconnected my internal WG to avoid building boost and threw in a straight pipe for the UICP (no BOV). Here is the question... I am running at about 8 lbs of vacuum and slowly build to around 1.5 lbs of vacuum by 3200RPMs (the highest i have ran it so far). Am I getting boost creep? Shouldn't the vacuum hold? Most importantly, am I in danger of some compressor surge since I running no BOV? I wanted to drive the car a little while I rework the UICP but I am thinking that I should hold off. Thoughts? -------------------- Fast & Furious on the outside...DSM under the hood!!!
|
 |
 
|
|
May 30 2006, 11:10 AM
Post
#2
|
|
 Post Master Group: Members Posts: 908 Joined: 7-October 03 From: Chillicothe, IL Member No.: 182 |
You will get creep. It's not uncommon to see 2-4psi by 6000 even with the WG sitting wide open. I wouldn't worry about it. If you want less creep, restrict your exhaust.
-------------------- GVR4 866/1000 = the perpetually broken car
|
|
|
|
|
May 30 2006, 01:20 PM
Post
#3
|
|
|
Web Administrator Yo! Group: Admin Posts: 516 Joined: 30-August 04 From: Mackinaw, IL Member No.: 376 |
Thanks, it makes sense that the WG would not always be the path of least resistance and the turbine would end up spinning some. Thanks again for the info
-------------------- Fast & Furious on the outside...DSM under the hood!!!
|
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
| Lo-Fi Version | Time is now: 21st June 2026 - 10:02 PM |
Powered By IP.Board
© 2026 IPS, Inc.