boost; what's yours at? - Page 3 - 3000GT/Stealth International Message Center

syangvr4 · 05-10-2008, 08:05 AM

I had the same problem you did. Found out when i did my engine dress up kit that i threw away my clutch and brake check valve which caused my vac leak making me boost over 20 psi also. I bought a new one and fixed that problem. Looks like in your case you still have those. Its probably a vacum leak somewhere else, but everything still looks stock from all those engine pics. only thing is the boost controller you have. Make sure its not installed backwards because if it is, it will over boost. I know because i had my boost controller installed backwards.

italiano3kgt · 05-10-2008, 10:01 AM

ok first thing is first. your boost gauge does not read how much boost you are pushing. there are 2 sides on the boost gauge. -20 -15-10-5 0 5 10 15 20. that does not in any way tell you how much psi your car is running. if you have your boost set to 5 like me, and if you hit the gas it will go all the way to 20, telling you that you have reach 5 psi. if you have it set to 14, and hit the gas it will go to 20 telling you it has reached 14psi. the point of the boost gauge is not to tell you how much boost you are under as in 5psi or 10psi or 14psi. the point is to tell you when you have reached the amount of psi that your boost is set to. anymore questions or if you dont understand, pm me and i can give a better explanation.

syangvr4 · 05-10-2008, 10:17 AM

Quote:

Originally Posted by italiano3kgt

ok first thing is first. your boost gauge does not read how much boost you are pushing. there are 2 sides on the boost gauge. -20 -15-10-5 0 5 10 15 20. that does not in any way tell you how much psi your car is running. if you have your boost set to 5 like me, and if you hit the gas it will go all the way to 20, telling you that you have reach 5 psi. if you have it set to 14, and hit the gas it will go to 20 telling you it has reached 14psi. the point of the boost gauge is not to tell you how much boost you are under as in 5psi or 10psi or 14psi. the point is to tell you when you have reached the amount of psi that your boost is set to. anymore questions or if you dont understand, pm me and i can give a better explanation.

This is definately not whats up. he has an aftermarket boost gauge and he is hitting fuel cut. If its a mechanical boost gauge like mine it should work the same way and that means the needle had better stop at 14psi or hes in serious trouble.

95teetee · 05-10-2008, 11:17 AM

Quote:

Originally Posted by syangvr4

This is definately not whats up. he has an aftermarket boost gauge and he is hitting fuel cut. If its a mechanical boost gauge like mine it should work the same way and that means the needle had better stop at 14psi or hes in serious trouble.

correct- of course the boost gauge reads boost- what else would it read?

motorhead0293 · 05-10-2008, 12:28 PM

i'll look around and see if there is a leak anywheres. and syangvr4, so it should be fine after i replace the leaky hose (if there is one)? and we finally got the title from sacramento today, so we should be able to register it in n.y. now.

jay04 · 05-10-2008, 01:30 PM

15psi DD

josevr4 · 05-10-2008, 01:45 PM

anything above 14psi i run into fuelcut in the upper midrange rpm's.

boardFreak5 · 05-10-2008, 02:07 PM

Quote:

Originally Posted by italiano3kgt

ok first thing is first. your boost gauge does not read how much boost you are pushing. there are 2 sides on the boost gauge. -20 -15-10-5 0 5 10 15 20. that does not in any way tell you how much psi your car is running. if you have your boost set to 5 like me, and if you hit the gas it will go all the way to 20, telling you that you have reach 5 psi. if you have it set to 14, and hit the gas it will go to 20 telling you it has reached 14psi. the point of the boost gauge is not to tell you how much boost you are under as in 5psi or 10psi or 14psi. the point is to tell you when you have reached the amount of psi that your boost is set to. anymore questions or if you dont understand, pm me and i can give a better explanation.

This is completely Wrong!!!!

A boost gauge reads BOOST! most are in psi as in pounds per square inch. Unless your boost gauge is broken, if the gauge shows 15 psi, then the pressure source its hooked up to is pressurized to 15psi.

David

italiano: Stop giving advice, unless you actually know what you are talking about. It's a good thing there are others here to set him straight. How do you even know your car is set to 5 psi, if your gauge reads 20??

syangvr4 · 05-10-2008, 02:20 PM

If you find a leaky line and replace it that should help a bit. But it looks to me like your boost controller is the culprit of your high boost. If you dont have a data logger i wouldnt suggest going above 14psi. Try to turn down your boost controller and make sure its not hooked up backwards.

italiano3kgt · 05-11-2008, 12:10 AM

because i have it set at 5psi.. i had it tuned at MRD and had them leave it on 5psi. I have an apexi boost gauge, as does my 2 other friends with a 89 prelude and a 99 saab viggen. we where wondering why they went all the way to the 20 mark also so we asked around. maybe its just the kind of boost gauge we have but all three of us have the same one and they all read 20 when we hit them hard. the prelude it running 12psi, the viggen is running 15 psi, and im running 5psi. sorry if i was wrong but thats the conclusion that we came to. i doubt that all three of our boost gauges are hooked up wrong seeing that mine was hooked up by MRD and the viggens is stock and the prelude hooked his up himself.

05-10-2008, 08:05 AM	#21 (permalink)
syangvr4 Noobie Join Date: Apr 2007 Location: Sheldon, IA Drives: 95 pearl white Vr4 Trader Rating: (9)	Re: boost; what's yours at? I had the same problem you did. Found out when i did my engine dress up kit that i threw away my clutch and brake check valve which caused my vac leak making me boost over 20 psi also. I bought a new one and fixed that problem. Looks like in your case you still have those. Its probably a vacum leak somewhere else, but everything still looks stock from all those engine pics. only thing is the boost controller you have. Make sure its not installed backwards because if it is, it will over boost. I know because i had my boost controller installed backwards. __________________

05-10-2008, 10:01 AM	#22 (permalink)
italiano3kgt Born In Italy Join Date: Dec 2007 Location: williamsburg va Drives: 1993 3000gt N/A Trader Rating: (0)	Re: boost; what's yours at? ok first thing is first. your boost gauge does not read how much boost you are pushing. there are 2 sides on the boost gauge. -20 -15-10-5 0 5 10 15 20. that does not in any way tell you how much psi your car is running. if you have your boost set to 5 like me, and if you hit the gas it will go all the way to 20, telling you that you have reach 5 psi. if you have it set to 14, and hit the gas it will go to 20 telling you it has reached 14psi. the point of the boost gauge is not to tell you how much boost you are under as in 5psi or 10psi or 14psi. the point is to tell you when you have reached the amount of psi that your boost is set to. anymore questions or if you dont understand, pm me and i can give a better explanation. __________________ She love's the way i drive her!!!!

05-10-2008, 12:28 PM	#25 (permalink)
motorhead0293 New User - Please be kind Join Date: Mar 2008 Location: Kinderhook, NY Drives: 3000gt vr4 Trader Rating: (0)	Re: boost; what's yours at? i'll look around and see if there is a leak anywheres. and syangvr4, so it should be fine after i replace the leaky hose (if there is one)? and we finally got the title from sacramento today, so we should be able to register it in n.y. now.

05-10-2008, 01:30 PM	#26 (permalink)
jay04 Wrks on car btwn classes Join Date: Nov 2004 Location: South Carolina Drives: 1993 3KGT VR4 Trader Rating: (1)	Re: boost; what's yours at? 15psi DD __________________ Exterior: 99 REAR GARNISH \| SSR D5R 18”x9” RIMS \| CUSTOM ENGRAVED 3000GT VR4 LICENSE FRAME Drivetrain: EXEDY 6 PUCK RACING CLUTCH Interior: KATZSKIN LEATHER SEATS/INSERT \| CUSTOM ENGRAVED VR4 PLATE Guages: AEM WIDEBAND \| FUEL PRESSURE \| OIL PRESSURE \| WATER TEMP \| BOOST GAUGE Engine: DR500 \| 550cc INJECTORS \| 255 WALBRO FUEL PUMP \| AEROMOTIVE ADJUSTABLE FPR \| K&N AIR FILTER \| HALLMAN BOOST CONTROLLER \| HKS BLOW OFF VALVE \| KENNYBELL BOOST-A-SPARK Exhaust: 3SX 3in DOWN PIPE \| HIGH FLOW CAT \| BORLA 3in DUAL CAT BACK SYSTEM \| Braking: ZINK PLATED ROTORS \| STEEL BRAIDED BRAKE LINE Suspension: KYB SHOCK and STRUTS

05-10-2008, 01:45 PM	#27 (permalink)
josevr4 Drunken ironhorse Join Date: Jun 2007 Location: bakersfield cali Drives: ironhorsew/drinkprob Trader Rating: (0)	Re: boost; what's yours at? anything above 14psi i run into fuelcut in the upper midrange rpm's. __________________ Dejon dual intakes and Ypipe, Synapse B.O.V., Gen2 Maft w/3.5" sensor(blowthru),Supra fuel pump, RandomTech Cat,3SXdownpipe,Ips singletip exhaust, Maximal solid motormounts. Coming:13t's,Gtpro headers w/precat elims,550cc's and a clutch to hold it all.

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05-10-2008, 02:20 PM	#29 (permalink)
syangvr4 Noobie Join Date: Apr 2007 Location: Sheldon, IA Drives: 95 pearl white Vr4 Trader Rating: (9)	Re: boost; what's yours at? If you find a leaky line and replace it that should help a bit. But it looks to me like your boost controller is the culprit of your high boost. If you dont have a data logger i wouldnt suggest going above 14psi. Try to turn down your boost controller and make sure its not hooked up backwards.

05-11-2008, 12:10 AM	#30 (permalink)
italiano3kgt Born In Italy Join Date: Dec 2007 Location: williamsburg va Drives: 1993 3000gt N/A Trader Rating: (0)	Re: boost; what's yours at? because i have it set at 5psi.. i had it tuned at MRD and had them leave it on 5psi. I have an apexi boost gauge, as does my 2 other friends with a 89 prelude and a 99 saab viggen. we where wondering why they went all the way to the 20 mark also so we asked around. maybe its just the kind of boost gauge we have but all three of us have the same one and they all read 20 when we hit them hard. the prelude it running 12psi, the viggen is running 15 psi, and im running 5psi. sorry if i was wrong but thats the conclusion that we came to. i doubt that all three of our boost gauges are hooked up wrong seeing that mine was hooked up by MRD and the viggens is stock and the prelude hooked his up himself.