lt1 in a 70 blazer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bdas70chevy · 01-28-2007, 04:40 PM

i wanted to get some insight on what i got my self in to i got a 94-96 lt1 engine with no computer or wiring. has anyone had any luck with the painless kit with the com. and the harness together? and do i have to run a return line back to the gas tank, and what kind of gas line should i use? i am trying to get everything set up so there is not that much down time on the blazer, if i can do some things before i take the motor out and stuff the lt1 in it thanx for any insight on the task

vtblazer · 01-28-2007, 05:15 PM

Doing a Painless kit right now for my TBI swap, seems to work out pretty well.
There's alot of stuff/wires you may not need/want/use but everything you 'will' need is there.

Not sure about what the LT1 needs but a TBI set up needs 15 psi and a TPI needs 45 psi for fuel pressure.

All will need a return line.

You have the comp. already or your going to get one?

LUV2XCLR8 · 01-28-2007, 05:31 PM

From West TN

vtblazer · 01-28-2007, 05:37 PM

Quote:

Originally Posted by LUV2XCLR8

From West TN

That all you got Merlot?

Craigs right, welcome to the board.

Musclerodz · 01-28-2007, 06:32 PM

Quote:

Originally Posted by bdas70chevy

i wanted to get some insight on what i got my self in to i got a 94-96 lt1 engine with no computer or wiring. has anyone had any luck with the painless kit with the com. and the harness together? and do i have to run a return line back to the gas tank, and what kind of gas line should i use? i am trying to get everything set up so there is not that much down time on the blazer, if i can do some things before i take the motor out and stuff the lt1 in it thanx for any insight on the task

You will need a high pressure pump, inline or in tank, and a return line. You will need to change or modify you accelerator cable, lokar has a fix for it. What tranny are you running? I have heard good and bad with the painless stuff.

Mike

onetonk5 · 01-28-2007, 08:28 PM

look at tanksinc.com for the fuel pump solution.

bdas70chevy · 01-28-2007, 08:33 PM

i dont have a computer i was looking at the painless harness and computer but it kind of expencive 1400 of the kit. i am going to run the 350 auto tranny that is stock with a rebuild kit already done and a 400 torque converter i had a tank built years ago 30 gal. so i thinking about a inline fuel pump?

Musclerodz · 01-29-2007, 12:13 PM

Quote:

Originally Posted by bdas70chevy

i dont have a computer i was looking at the painless harness and computer but it kind of expencive 1400 of the kit. i am going to run the 350 auto tranny that is stock with a rebuild kit already done and a 400 torque converter i had a tank built years ago 30 gal. so i thinking about a inline fuel pump?

Inlines are ok if they are sized right. They have been known to overheat if you run the wrong size pump because they use the fuel to cool it. To run the TH350, you will need to find TV cable bracket to operate the vaccum kickdown. I have one I got off ebay i will not be using since I am now installing a 4l60e in mine.

Mike

70rs/ss · 01-29-2007, 03:30 PM

Sounds like you might consider a carb. The computers can be had for a couple hundred maybe less out of a wrecked car.

01-28-2007, 04:40 PM	#1
bdas70chevy Registered User Join Date: Jan 2007 Location: az Posts: 49	lt1 in a 70 blazer i wanted to get some insight on what i got my self in to i got a 94-96 lt1 engine with no computer or wiring. has anyone had any luck with the painless kit with the com. and the harness together? and do i have to run a return line back to the gas tank, and what kind of gas line should i use? i am trying to get everything set up so there is not that much down time on the blazer, if i can do some things before i take the motor out and stuff the lt1 in it thanx for any insight on the task

01-28-2007, 05:15 PM	#2
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,538	Re: lt1 in a 70 blazer Doing a Painless kit right now for my TBI swap, seems to work out pretty well. There's alot of stuff/wires you may not need/want/use but everything you 'will' need is there. Not sure about what the LT1 needs but a TBI set up needs 15 psi and a TPI needs 45 psi for fuel pressure. All will need a return line. You have the comp. already or your going to get one?

01-28-2007, 05:31 PM	#3
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,475	Re: lt1 in a 70 blazer From West TN __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Big Piggy: "Goliath" 07 Kodiak C4500 Lil Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

01-28-2007, 08:28 PM	#6
onetonk5 Cereal Killer Join Date: Jan 2006 Location: Montgomery, Alabama Posts: 639	Re: lt1 in a 70 blazer look at tanksinc.com for the fuel pump solution.

01-28-2007, 08:33 PM	#7
bdas70chevy Registered User Join Date: Jan 2007 Location: az Posts: 49	Re: lt1 in a 70 blazer i dont have a computer i was looking at the painless harness and computer but it kind of expencive 1400 of the kit. i am going to run the 350 auto tranny that is stock with a rebuild kit already done and a 400 torque converter i had a tank built years ago 30 gal. so i thinking about a inline fuel pump?

01-29-2007, 03:30 PM	#9
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: lt1 in a 70 blazer Sounds like you might consider a carb. The computers can be had for a couple hundred maybe less out of a wrecked car.



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