vortec/ blazer tank - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Larry S · 02-22-2009, 09:04 AM

Heres what I have. A 1996 5.7 vortec sitting in the front of my frame, and a blazer tank kit in the back. The question is, should I use the sender that came with the tank kit to be the proper ohms for my factory 69 gauge, and install a frame mount fuel pump? If thats my best option what would be best pump to use? Thank you for your time.

Gray Ghost · 02-22-2009, 10:38 AM

Cliff tells me that I need an in tank pump. He said it will work fine UNLESS I let the tank go below 1/4 full. Then I will have fuel starvation problems.

He told me to get a newer Blazer tank made for EFI [w/ baffles] to eliminate all problems, so that's what I am going to do.

Since Cliff is an ASE certified mechanic who works on everything from Chevy's to exotics, I trust him over most others I talk to.

extd56 · 02-22-2009, 12:02 PM

Quote:

Originally Posted by Gray Ghost

Cliff tells me that I need an in tank pump. He said it will work fine UNLESS I let the tank go below 1/4 full. Then I will have fuel starvation problems.

He told me to get a newer Blazer tank made for EFI [w/ baffles] to eliminate all problems, so that's what I am going to do.

Since Cliff is an ASE certified mechanic who works on everything from Chevy's to exotics, I trust him over most others I talk to.

I used a 89 Blazer tnak in my 67 for my fuel injected swap and it works great.

Sammy · 02-22-2009, 11:12 AM

Check the OHMS on the sending unit it should be fine as long as it is of our year group. I used I think a delco pump. First installed on r/h fender well had problems getting it to reprime moved it to frame works great. Good Luck.

jbristo67 · 02-22-2009, 12:33 PM

Pump needs to be in the tank. Thats what keeps the pump cool. In the tank for sure

Larry S · 02-22-2009, 09:33 PM

Its a 67-72 blazer tank with a 0-90 ohms sender.

Skirkpat · 02-22-2009, 09:59 PM

Fuel injected engines should have pump in tank, always ! It may run with the pump on the frame, but you will put unneeded strain on the pump ( liquid is easier to push than pull) If you want to do it right put it in the tank with a baffle and sump if possible?, and it's a good Idea to NEVER let it get down to 1/4 tank.

Larry S · 02-23-2009, 09:42 PM

The Blazer tank I have has never had gas put in it before, so I even thought about cutting another hole in it and mounting my 96 in tank pump into the tank and using it as strictly a fuel pump (the pump that came out of the truck the engine is from), and having the 0-90 ohm sender (that came with the tank) also as strictly a sender and plugging off the fuel like on it. I'm just thinking out loud but I know that pump is the adequate fuel pressure for the vortec because it all came from the same truck, and the 0-90 ohm sender will work my 69 gauge. I wish someone made an in-tank pump with adequate pressure for vortec with a 0-90 ohm sender to fit in the Balzer tank. I hope that make sense.?! Probably dont, Im tired.

Gray Ghost · 02-24-2009, 12:44 AM

Your best bet is to get a tank made for efi. The 89 blazer tank has the correct sender and pump.

67ChevyRedneck · 02-25-2009, 11:27 PM

I've heard the "Don't let it get below 1/4 tank thing" MANY times. So, I took it to heart. Makes sense to me, more fuel = a covered pump surrounded by a cooler fuel. So in my silverado and my wifes corolla we don't let the fuel get much below 1/4 tank. I've read many complaints of the silverado fuel pumps dying early on other websites and mine has 118K on it and the 'yota is up to 112K. Not sure if I'm lucky or there really is something to that advice.

I'd recommend in tank as well.

Gray Ghost · 02-25-2009, 11:36 PM

That's only for the in tank pump without baffles. If you don't have baffles the pump can go dry if you turn a corner fast or slosh the fuel around too much.

The wife has a 98 S10 and we never fill it at 1/4 tank.

I guess I stand corrected on the pump part of the 89 Blazer tank. I am not an expert on EFI by any means. So what is the PSI of the 89 pump?

jorgensensc · 02-26-2009, 01:35 AM

So here is a really dumb idea, but think about this one. Get a small tank that ships with some trucks from the factory. It is like 3 or 4 gallons. If I remember it has a fuel pump in it. Put it in between the engine and the blazer tank (in line). Run a low budget low pressure external fuel pump from the blazer tank to the new tank. This keeps fuel in the small tank (swirl pot) at all times and keeps the pump from running low on fuel. the low pressure pump keeps it full. This is the way early fuel injections worked without baffles. Just an Idea.
Shawn

68C15 · 02-26-2009, 06:52 AM

an 89 pump (TBI) runs at 9 to 13 PSI. they were used from 87 through 95. then in 96 they went to multi port (vortec).

Larry S · 02-26-2009, 07:50 PM

Yea. I was told that the 96 sender/ pump was a different ohm sender and my gauge would not be right. See Im using the wiring harness from the 96 silverado that the engine came out of. So that would be great if the sender was the same ohms. I could just modify the blazer tank to put that unit in it and it would be the correct pressure for the engine. Both senders are very close to the same height. I would like to use what I have, but its gonna have to work right.

02-22-2009, 09:04 AM	#1
Larry S Registered User Join Date: Sep 2008 Location: Gainesville Ga Posts: 210	vortec/ blazer tank Heres what I have. A 1996 5.7 vortec sitting in the front of my frame, and a blazer tank kit in the back. The question is, should I use the sender that came with the tank kit to be the proper ohms for my factory 69 gauge, and install a frame mount fuel pump? If thats my best option what would be best pump to use? Thank you for your time.

02-22-2009, 10:38 AM	#2
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: vortec/ blazer tank Cliff tells me that I need an in tank pump. He said it will work fine UNLESS I let the tank go below 1/4 full. Then I will have fuel starvation problems. He told me to get a newer Blazer tank made for EFI [w/ baffles] to eliminate all problems, so that's what I am going to do. Since Cliff is an ASE certified mechanic who works on everything from Chevy's to exotics, I trust him over most others I talk to. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

02-22-2009, 11:12 AM	#4
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: vortec/ blazer tank Check the OHMS on the sending unit it should be fine as long as it is of our year group. I used I think a delco pump. First installed on r/h fender well had problems getting it to reprime moved it to frame works great. Good Luck. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

02-22-2009, 12:33 PM	#5
jbristo67 resident oilfield trash Join Date: Jan 2009 Location: Lubbock TX Posts: 1,465	Re: vortec/ blazer tank Pump needs to be in the tank. Thats what keeps the pump cool. In the tank for sure __________________ 1967 SWB C10 396/400 factory air factory tach (sadly had to send to a new home) 1986 Honda 70 Fourtrax 1991 Chevrolet K5 blazer 2wd 1982 Mastercraft Pro Star 190 Stars and Stripes 2002 Chevrolet Tahoe 2011 Nissan Armada

02-22-2009, 09:33 PM	#6
Larry S Registered User Join Date: Sep 2008 Location: Gainesville Ga Posts: 210	Re: vortec/ blazer tank Its a 67-72 blazer tank with a 0-90 ohms sender.

02-22-2009, 09:59 PM	#7
Skirkpat Registered User Join Date: Dec 2008 Location: K.C. Missouri Posts: 1,024	Re: vortec/ blazer tank Fuel injected engines should have pump in tank, always ! It may run with the pump on the frame, but you will put unneeded strain on the pump ( liquid is easier to push than pull) If you want to do it right put it in the tank with a baffle and sump if possible?, and it's a good Idea to NEVER let it get down to 1/4 tank.

02-23-2009, 09:42 PM	#8
Larry S Registered User Join Date: Sep 2008 Location: Gainesville Ga Posts: 210	Re: vortec/ blazer tank The Blazer tank I have has never had gas put in it before, so I even thought about cutting another hole in it and mounting my 96 in tank pump into the tank and using it as strictly a fuel pump (the pump that came out of the truck the engine is from), and having the 0-90 ohm sender (that came with the tank) also as strictly a sender and plugging off the fuel like on it. I'm just thinking out loud but I know that pump is the adequate fuel pressure for the vortec because it all came from the same truck, and the 0-90 ohm sender will work my 69 gauge. I wish someone made an in-tank pump with adequate pressure for vortec with a 0-90 ohm sender to fit in the Balzer tank. I hope that make sense.?! Probably dont, Im tired.

02-24-2009, 12:44 AM	#9
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: vortec/ blazer tank Your best bet is to get a tank made for efi. The 89 blazer tank has the correct sender and pump. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps. Last edited by Gray Ghost; 02-24-2009 at 12:45 AM.

02-25-2009, 11:27 PM	#10
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: vortec/ blazer tank I've heard the "Don't let it get below 1/4 tank thing" MANY times. So, I took it to heart. Makes sense to me, more fuel = a covered pump surrounded by a cooler fuel. So in my silverado and my wifes corolla we don't let the fuel get much below 1/4 tank. I've read many complaints of the silverado fuel pumps dying early on other websites and mine has 118K on it and the 'yota is up to 112K. Not sure if I'm lucky or there really is something to that advice. I'd recommend in tank as well. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 02-25-2009 at 11:29 PM.

02-25-2009, 11:36 PM	#11
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: vortec/ blazer tank That's only for the in tank pump without baffles. If you don't have baffles the pump can go dry if you turn a corner fast or slosh the fuel around too much. The wife has a 98 S10 and we never fill it at 1/4 tank. I guess I stand corrected on the pump part of the 89 Blazer tank. I am not an expert on EFI by any means. So what is the PSI of the 89 pump? __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

02-26-2009, 01:35 AM	#12
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: vortec/ blazer tank So here is a really dumb idea, but think about this one. Get a small tank that ships with some trucks from the factory. It is like 3 or 4 gallons. If I remember it has a fuel pump in it. Put it in between the engine and the blazer tank (in line). Run a low budget low pressure external fuel pump from the blazer tank to the new tank. This keeps fuel in the small tank (swirl pot) at all times and keeps the pump from running low on fuel. the low pressure pump keeps it full. This is the way early fuel injections worked without baffles. Just an Idea. Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

02-26-2009, 06:52 AM	#13
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: vortec/ blazer tank an 89 pump (TBI) runs at 9 to 13 PSI. they were used from 87 through 95. then in 96 they went to multi port (vortec).

02-26-2009, 07:50 PM	#14
Larry S Registered User Join Date: Sep 2008 Location: Gainesville Ga Posts: 210	Re: vortec/ blazer tank Yea. I was told that the 96 sender/ pump was a different ohm sender and my gauge would not be right. See Im using the wiring harness from the 96 silverado that the engine came out of. So that would be great if the sender was the same ohms. I could just modify the blazer tank to put that unit in it and it would be the correct pressure for the engine. Both senders are very close to the same height. I would like to use what I have, but its gonna have to work right.



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