Best way to check for boost leak from couplers?
06-11-2005, 08:42 PM
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Best way to check for boost leak from couplers?
Hi guys,
I think I might have a boost leak on my revhard kit which I just installed into my B18C/CRX. Aside from taking off the hood and having somebody sit on the engine bay while I drive, what are some other ways to check for boost leaks?
-tape the edges of the couplers and after a run look for tape that has blown off?
-wrap the couplers in saran wrap and after a run look for bubbled saran wrap?
-soapy water (dont think it would work so well)
I havent done any WOT runs yet, but when I give it around 50% throttle and take it up to 4500 RPMs, the vacuum will go from 16 in/hg to 5-10 in/hg and stop. Right off the bat I'm guessing a boost leak somewhere. My DP is still not connected to my catback, but I dont think that has anything to do with it. Also, just now I remembered that I still had my stock sparkplugs in there and I didn't replace them with my .30 gapped plugs. I'm also running 750cc injectors on a Crome basemap and I can tell from the way it runs it's a little rich, so I might be bogging a little. Could any of these be a factor in my problem?
TIA
Modified by BlueShadow at 6:21 AM 6/12/2005
I think I might have a boost leak on my revhard kit which I just installed into my B18C/CRX. Aside from taking off the hood and having somebody sit on the engine bay while I drive, what are some other ways to check for boost leaks?
-tape the edges of the couplers and after a run look for tape that has blown off?
-wrap the couplers in saran wrap and after a run look for bubbled saran wrap?
-soapy water (dont think it would work so well)
I havent done any WOT runs yet, but when I give it around 50% throttle and take it up to 4500 RPMs, the vacuum will go from 16 in/hg to 5-10 in/hg and stop. Right off the bat I'm guessing a boost leak somewhere. My DP is still not connected to my catback, but I dont think that has anything to do with it. Also, just now I remembered that I still had my stock sparkplugs in there and I didn't replace them with my .30 gapped plugs. I'm also running 750cc injectors on a Crome basemap and I can tell from the way it runs it's a little rich, so I might be bogging a little. Could any of these be a factor in my problem?
TIA
Modified by BlueShadow at 6:21 AM 6/12/2005
06-12-2005, 03:03 PM
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Re: Best way to check for boost leak from couplers? (BlueShadow)
Rig up a compressor... u have to make up something that u can plug intake ur piping right after the compressor on the turbo...hook it up to ur compressor n run about 20 pnds through it... n just listen for leaks... its called a boost leak check (apparently) if i can ill get a pic of the rig i use...
06-12-2005, 04:54 PM
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Re: Best way to check for boost leak from couplers? (ttsupraman93)
I was actually thinking of something like that! 
I thought about pressurizing the entire charge piping by hooking up a pump to the nipple on my compressor. At first I didn't know where I would buy a cap for the compressor inlet, but I should be able to find one at any hardware/plumbing store. The only thing that sucks is to remove my air filter I have to take the whole manifold off the car. Maybe I can cover up the filter with something.
I thought about pressurizing the entire charge piping by hooking up a pump to the nipple on my compressor. At first I didn't know where I would buy a cap for the compressor inlet, but I should be able to find one at any hardware/plumbing store. The only thing that sucks is to remove my air filter I have to take the whole manifold off the car. Maybe I can cover up the filter with something.
06-12-2005, 05:32 PM
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Re: Best way to check for boost leak from couplers? (BlueShadow)
06-12-2005, 05:38 PM
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Re: Best way to check for boost leak from couplers? (Laserjock)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Laserjock »</TD></TR><TR><TD CLASS="quote">http://www.vfaq.com/mods/ICtester.html
courtesy of vfaq.com
</TD></TR></TABLE>
hey, that's even better then hooking it up to the compressor nipple. Thanks dude, I'll use that site to make up something similar.
courtesy of vfaq.com
</TD></TR></TABLE>hey, that's even better then hooking it up to the compressor nipple. Thanks dude, I'll use that site to make up something similar.
07-26-2005, 08:40 AM
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Re: Best way to check for boost leak from couplers? (BlueShadow)
we have a smoke tester at our shop that has a nozzle that hooks up to any vaccum port or pretty much any opening into piping or tubing or hose, and it shoots a dark colored smoke through the lines so you can see real clear where the leak is coming from when it looks like your car is on fire, it works great .
.
07-27-2005, 02:32 PM
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Re: Best way to check for boost leak from couplers? (B00STED Si)
******* awesome...first post I checked, and a good link to boot. Gotta do this tomorrow. I'm losing boost somewhere 
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