Vortec questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

VROD383 · 12-24-2007, 07:09 PM

what do I need to hook up the computer in my 71 blazer. I just bought the motor it's a 98 5.7. if anyone has some info that be great.

**clay68c10** · 12-25-2007, 04:00 AM

No solid info, but I'd get a wiring diagram for the donor and figure out your power and ground situation to get it up and running. Then you can wire in brake light signal, neutral safety switch, VSS, etc if you want or need those inputs.

Huck · 12-25-2007, 04:30 AM

Do a search on the net under GM motor upgardes.
One this for sure--before you stick this motor into anything, BE SURE TO REDO the intake manifold gasket. They are notorious for intake gasket failure and it is a real PITA to replace when in the truck. Would also change the heater hose fitting on the intake as it is another know POS.
Othere then those 2 areas, the 5.7 vortec is super--as is the 5.3--Huck

**clay68c10** · 12-25-2007, 04:44 AM

I'll second the coolant leaks reseal advice. Super easy with the motor out.

VROD383 · 12-25-2007, 04:52 AM

thanks ill check that out

bdas70chevy · 01-12-2009, 08:51 PM

i just did that in my 70 blazer. 5.7 and the computer and 460le trans u need the wire harness and the computer. Unless u buy a harness from painless with computer??

12-24-2007, 07:09 PM	#1
VROD383 Registered User Join Date: Dec 2007 Location: BAY AREA, CA Posts: 47	Vortec questions what do I need to hook up the computer in my 71 blazer. I just bought the motor it's a 98 5.7. if anyone has some info that be great.

12-25-2007, 04:00 AM	#2
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,991	Re: Vortec questions No solid info, but I'd get a wiring diagram for the donor and figure out your power and ground situation to get it up and running. Then you can wire in brake light signal, neutral safety switch, VSS, etc if you want or need those inputs. __________________ ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ

12-25-2007, 04:30 AM	#3
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,261	Re: Vortec questions Do a search on the net under GM motor upgardes. One this for sure--before you stick this motor into anything, BE SURE TO REDO the intake manifold gasket. They are notorious for intake gasket failure and it is a real PITA to replace when in the truck. Would also change the heater hose fitting on the intake as it is another know POS. Othere then those 2 areas, the 5.7 vortec is super--as is the 5.3--Huck

12-25-2007, 04:44 AM	#4
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,991	Re: Vortec questions I'll second the coolant leaks reseal advice. Super easy with the motor out. __________________ ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ

12-25-2007, 04:52 AM	#5
VROD383 Registered User Join Date: Dec 2007 Location: BAY AREA, CA Posts: 47	Re: Vortec questions thanks ill check that out

01-12-2009, 08:51 PM	#6
bdas70chevy Registered User Join Date: Jan 2007 Location: az Posts: 49	Re: Vortec questions i just did that in my 70 blazer. 5.7 and the computer and 460le trans u need the wire harness and the computer. Unless u buy a harness from painless with computer??



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