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?'s on fuel pressure guage adapters..need help

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Old May 25, 2004 | 11:39 PM
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dangerousd89's Avatar
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From: Lubbock Tx
Car: so many projects to little time
Engine: 350 tbi
Transmission: 700r4
?'s on fuel pressure guage adapters..need help

i have a holley tbi unit i am fixing to use (just got from jegs). the only thing i am waiting on is i want to put a fpq on the feed line to the tbi. i have found the fitting through earls performance plumbing but i dont know the size. -6,-8 an, what does that mean 1/4,3/8 npt. what does an and npt mean and what size do i need. how can i tell the size and so on. i know it needs to be male on one side and female on the other. thanx ahead of time guys.....
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Old May 26, 2004 | 01:39 PM
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i have the part # at home if you email me. i used aeroquip fittings however. it actually has an o ring on the end that (male) enters the TB. i believe the size hose i used was 6 AN. not sure what the pipe size was(male end). i took TB to speed shiop(aero distributor) and they fixed me up nicely with all fittings needed.
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Old May 26, 2004 | 01:44 PM
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
what would be really nice is a adaptor with a shrader valve, so you can attach a gauge that you can see while driving.
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Old May 26, 2004 | 03:54 PM
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Car: 89 Firebird
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So how difficult would it be to make one like that? Anybody have access to the materials? I bet they would sell like hotcackes! I know I'd buy one, for sure.
Just like an extension fitting, but with a schrader valve installed in the side. Something like that, Dewey?
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Old May 26, 2004 | 04:12 PM
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Car: 90 454SS
Engine: 454 TBI
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Originally posted by Dewey316
what would be really nice is a adaptor with a shrader valve, so you can attach a gauge that you can see while driving.
There is such an animal. AutoZone sells a kit for checking TBI pressure, can't remember the brand name. It has a valve that the hose with the gauge connects to.

I removed the diagnostic gauge and screwed the hose into the diaphragm that comes with AutoMeter's isolated fuel gauge.

Don't have time to resource the numbers right now, so if someone else doesn't jump in with the numbers, I'll find 'em.
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Old May 26, 2004 | 04:33 PM
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From: Delta, PA
Car: 89 Firebird
Engine: L05 350 TBI
Transmission: 700r4-slippin' on it's last leg
I think I found it

http://www.actron.com/cgi-bin/web_st...id=268682_5745

And at autozone it's cheaper

http://www.autozone.com/servlet/UiBr...7C%7EEA%7C%7EB
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Old May 26, 2004 | 04:57 PM
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From: Delta, PA
Car: 89 Firebird
Engine: L05 350 TBI
Transmission: 700r4-slippin' on it's last leg
va454,

BTW, what model Autometer gauge do you have? I'd like to setup a gauge in the car also. I have been looking, but the only ones I see go to like 15psi.
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Old May 26, 2004 | 05:34 PM
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Car: 90 454SS
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Originally posted by jconrad
va454,

BTW, what model Autometer gauge do you have? I'd like to setup a gauge in the car also. I have been looking, but the only ones I see go to like 15psi.
This is what I originally used:

http://store.summitracing.com/partde...art=ATM%2D3313

However, I've exceeded the 15 psi limit of the gauge a little, so I installed this:

http://store.summitracing.com/partde...art=ATM%2D3312

However, its less accurate than should be.

I need to get this:

http://store.summitracing.com/partde...art=ATM%2D5282

Hope that helps
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Old May 26, 2004 | 06:09 PM
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Car: 91 RS
Engine: 305
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Here's a pic where I ran mine from. One is under the hood which you can see and the sensor runs to an electric guage inside.

Last edited by DM91RS; Oct 7, 2006 at 05:53 AM.
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Old Jul 30, 2004 | 02:23 PM
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From: Hockessin, Delaware
Car: Red 91 RS Camaro
Engine: LO3 with Comp Cam
Transmission: 700R4
Axle/Gears: 4th gen rear
DM91RS could you take a closer picture of your fuel prssure gauge setup. I've been all over trying to find a T fitting to mount it the same way you are but I can't find a T fitting to go inbetween the hard and soft line. Could you tell me what you used.
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Old Jul 30, 2004 | 07:14 PM
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From: Ga
Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73
Originally posted by iggy1991
DM91RS could you take a closer picture of your fuel prssure gauge setup. I've been all over trying to find a T fitting to mount it the same way you are but I can't find a T fitting to go inbetween the hard and soft line. Could you tell me what you used.
WOW..I knew that I've been busy.....but I have not been to this site since 6-13.

I was subscribed to this thread and would not have known except for e-mail....anyway the t-fitting with barbed ends came from Summit racing. Part number or size does not come to mind after 4 years. Hope the fuzy pic helps. The actual fitting is the silver part. I have a nipple and another t-fitting plumbed in to allow a guage under the hood and an electrical sensor for the guage in the car.

Last edited by DM91RS; Oct 7, 2006 at 05:53 AM.
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Old Jul 31, 2004 | 12:43 AM
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From: Hockessin, Delaware
Car: Red 91 RS Camaro
Engine: LO3 with Comp Cam
Transmission: 700R4
Axle/Gears: 4th gen rear
Hmm not exatly what I was hopin to see but it helps. Have you had any problems with leaks from having that kind of setup on the high pressure line?

I was hopin to find a T fitting that would go inline with the factory setup without having to cut anything. The picture will show better...
Attached Thumbnails ?'s on fuel pressure guage adapters..need help-dcp_0014_21.jpg  
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Old Jul 31, 2004 | 11:56 AM
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From: Ga
Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73
No leaks after four years of having all that shet hanging there. Its just an inline t with barbed fittings and a 1/8 NPT tapped hole in the middle. I did not find anything else when I was looking back then. Not that there isn't something to be found. I didn't want to cut it either but have had no problems
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