No boast after 5k, not normal boast leak. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Rich Druash · 08-21-2006, 05:08 PM

I've checked every cupler and vacuume line in my car and can't find any kind of leak. I've even replaced all my cuplers. It accelerates until just under 5k about 12 psi at that rpm and than boost drops to 0 suddently and the car falls on it's face. I've had several turbo cars and never seen a boast leak that acts like this. I'm using a GT2871R with 550 injectors and Enthalpy ECU with a 300zx MAF. Everything was running perfect until I hit a deer in full boost. I replaced a damaged front mount,MAF, and Charge pipe, but everything else is still the same. The wastegate actuator is so far towards the back of the engine that I can't imagine it would have been effected by the deer which flew over the top of the car anyways. The only other possiblity is if maybee the blow off valve was damaged from hitting the hood and has some odd type of leak but I've never heard of anything like that before. Any help would be apreciated. Thanks

trybal · 08-21-2006, 05:47 PM

hummm. could be a slight hold in your i/c piping. i had a small pin hole leak that only leaked at about 4500-5k or was only noticable then

steve shadows · 08-21-2006, 05:59 PM

if your using the stock inlet intake tube (rubber) there should be a big spring in it that keeps it from collapsing itself under boost/load. If its gone it would causet this

trybal · 08-21-2006, 06:01 PM

hey.. you have told 2 people that this week ^^ lol. its gotta be the problem sooner or later.

cotbu · 08-21-2006, 06:20 PM

Rich Druash · 08-21-2006, 08:02 PM

Yea I'll look at that but it never did anything like that before.

Maeda · 08-22-2006, 03:39 AM

Tbolt Clamps. Do you have them?

DMC · 08-22-2006, 11:35 PM

i know im not helping at all but since no one told you its boost not boast

Vatche · 08-22-2006, 11:41 PM

LOL ^^^^^^^^^^^^^^ i didnt even notice til i read this hahahahhaha

cotbu · 08-23-2006, 09:10 AM

Valve cover gasket?

08-21-2006, 05:08 PM	#1
Rich Druash Leaky Injector Join Date: Mar 2005 Location: Virginia Posts: 52 Trader Rating: (0) Feedback Score: 0 reviews	No boast after 5k, not normal boast leak. I've checked every cupler and vacuume line in my car and can't find any kind of leak. I've even replaced all my cuplers. It accelerates until just under 5k about 12 psi at that rpm and than boost drops to 0 suddently and the car falls on it's face. I've had several turbo cars and never seen a boast leak that acts like this. I'm using a GT2871R with 550 injectors and Enthalpy ECU with a 300zx MAF. Everything was running perfect until I hit a deer in full boost. I replaced a damaged front mount,MAF, and Charge pipe, but everything else is still the same. The wastegate actuator is so far towards the back of the engine that I can't imagine it would have been effected by the deer which flew over the top of the car anyways. The only other possiblity is if maybee the blow off valve was damaged from hitting the hood and has some odd type of leak but I've never heard of anything like that before. Any help would be apreciated. Thanks

08-21-2006, 05:59 PM	#3
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	if your using the stock inlet intake tube (rubber) there should be a big spring in it that keeps it from collapsing itself under boost/load. If its gone it would causet this __________________ Like Me on FaceBook !

08-21-2006, 06:20 PM	#5
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	LOL __________________ LoverTechnologies "Half Broken Things!"

08-22-2006, 03:39 AM	#7
Maeda Nissanaholic! Join Date: Dec 2002 Location: Camp Snake Bite, CA RIP Posts: 2,356 Trader Rating: (0) Rides Gallery: Maeda Feedback Score: 0 reviews	Tbolt Clamps. Do you have them? __________________

08-23-2006, 09:10 AM	#10
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Valve cover gasket? __________________ LoverTechnologies "Half Broken Things!"

08-21-2006, 05:47 PM	#2
trybal Zilvia Junkie Join Date: Nov 2005 Location: Seattle wa Posts: 299 Trader Rating: (0) Feedback Score: 0 reviews	hummm. could be a slight hold in your i/c piping. i had a small pin hole leak that only leaked at about 4500-5k or was only noticable then

08-21-2006, 06:01 PM	#4
trybal Zilvia Junkie Join Date: Nov 2005 Location: Seattle wa Posts: 299 Trader Rating: (0) Feedback Score: 0 reviews	hey.. you have told 2 people that this week ^^ lol. its gotta be the problem sooner or later.

08-21-2006, 08:02 PM	#6
Rich Druash Leaky Injector Join Date: Mar 2005 Location: Virginia Posts: 52 Trader Rating: (0) Feedback Score: 0 reviews	Yea I'll look at that but it never did anything like that before.

08-22-2006, 11:35 PM	#8
DMC Zilvia Addict Join Date: Jan 2003 Location: Chesapeake, Va Posts: 609 Trader Rating: (0) Feedback Score: 0 reviews	i know im not helping at all but since no one told you its boost not boast

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