Fabrication Everything From JBwelded/Fluxcored downpipes to Equal length SS Manifolds.

my boost leak tester >$9

Old 01-04-2010, 01:25 PM
  #1  
0.5 BAR
Thread Starter
 
Join Date: May 2009
Posts: 121
Lightbulb my boost leak tester >$9

saw this on an evo forum and made my own.
sized for a t3/t4 turbo w/ a 3 inch inlet.

1 rubber pvc connector i got from home depot 3" to 3" with hose clamps on it.

1 3 inch threaded pvc plug

1 valve stem i got from discount tire for free, i just told him that i needed an old one for a boost leak tester and he got one for me.

final product!!


un assembled, kinda


obviously get the right size parts for your turbo inlet,
and follow the rules to testing,

dont go too far over your max boost.

just hook up your bike pump to the end and get pumping!
emery is offline  
Old 01-04-2010, 09:42 PM
  #2  
0.5 BAR
 
Join Date: Nov 2009
Posts: 50
Default

a+
tecks is offline  
Old 03-17-2010, 12:41 PM
  #3  
0.0 BAR
 
Join Date: Jun 2009
Posts: 6
Default

do you get any leak past the TB and then through open valves etc? or with the plate closed does it seal well enough?
tek_civic is offline  
Old 03-17-2010, 03:48 PM
  #4  
1.0 BAR
 
Join Date: Sep 2005
Posts: 199
Default

The boost slowly leaks past the throttle body. I used a pvc cap for mine, i believe its a 2.75inch pvc cap with a tire valve in the middle =-)
omgbossis21 is offline  
Old 03-17-2010, 05:16 PM
  #5  
0.5 BAR
Thread Starter
 
Join Date: May 2009
Posts: 121
Default

throttle body position doesnt matter since half the valves are closed at all times. either the pressure will stop before entering the cylinder or in the cylinder.
emery is offline  
Old 03-17-2010, 11:32 PM
  #6  
0.0 BAR
 
Join Date: Jun 2009
Posts: 6
Default

unless the engine stops on valve overlap. remember some of us are running NA cam timing/cams
tek_civic is offline  
Old 03-18-2010, 11:20 PM
  #7  
1.0 BAR
 
hard2obtain's Avatar
 
Join Date: Jan 2006
Posts: 526
Default

I like it... so easy
hard2obtain is offline  
Old 03-19-2010, 12:15 AM
  #8  
0.5 BAR
Thread Starter
 
Join Date: May 2009
Posts: 121
Default

hell if i know, ive never heard of valve overlap lol, im guessing you wont be able to hear the air leaking into the exhaust there though.
emery is offline  
Old 03-19-2010, 11:30 AM
  #9  
0.0 BAR
 
Join Date: Jun 2009
Posts: 6
Default

Valve overlap is prominent in NA engines and not so much turbo (factory specs on both). This is where both the intake and exhaust valves are open at the same time, this lets fresh air in and clear the combustion chamber at a high velocity as both ports are open. On turbo cars there still may be some overlap but it is much less as the air is being forced through at a much higher rate.

On NA cars that have been turbocharged excessive overlap can cause problems, nothing bad just efficient use of potential power (volumetric efficiency is lower). The cheap way to get by this, on a DOHC engine, is buy adjustable cam gears and clock them each away from eachother slightly to tune out the overlap. The best way is just new cams. On single cam engines and some DOHC it isnt possible to tune out the overlap with cam gears. The last option is to have the cams reground to a different profile, mixed results on this (either they last or they dont)
tek_civic is offline  
Old 03-19-2010, 11:30 AM
  #10  
0.0 BAR
 
Join Date: Jun 2009
Posts: 6
Default

Valve overlap is prominent in NA engines and not so much turbo (factory specs on both). This is where both the intake and exhaust valves are open at the same time, this lets fresh air in and clear the combustion chamber at a high velocity as both ports are open. On turbo cars there still may be some overlap but it is much less as the air is being forced through at a much higher rate.

On NA cars that have been turbocharged excessive overlap can cause problems, nothing bad just efficient use of potential power (volumetric efficiency is lower). The cheap way to get by this, on a DOHC engine, is buy adjustable cam gears and clock them each away from eachother slightly to tune out the overlap. The best way is just new cams. On single cam engines and some DOHC it isnt possible to tune out the overlap with cam gears. The last option is to have the cams reground to a different profile, mixed results on this (either they last or they dont)
tek_civic is offline  

Thread Tools
Search this Thread
Quick Reply: my boost leak tester >$9


Contact Us - Sitemap - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.