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#1 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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HEI relay install.(PIC'S)
I installed a relay to power up my HEI today.
Pretty easy install. I also installed a relay for my heated o2 sensor. Here are a couple pic's. ALL the pic's can be viewed HERE The relays I used.rated at 40 amps.They are DPDT(Double Pole Double Throw) relays.$3.00 each at my local electronics wharehouse. ![]() Ran these wire from a existing IGN. splice at the IGN. switch to trigger the relays on. ![]() Here is the splice I had made at the IGN. switch(kinda hard to see) ![]() I replace my existing 1 wire o2 sensor with a 3 wire(heated) o2 sensor.Here is the retrofit harness. ![]() Here's the new 3 wire o2 sensor installed in the drivers exhaust manifold. ![]() This is the power feed to the relays.Red goes to the HEI relay(12g wire).Blue goes to the o2 sensor relay(12g wire). The circuit is protected by a 16g fusable link(light blue wire). ![]() All hooked up now. ![]() Here's the voltage now being sent to my HEI coil 14.12volts. Should produce a nice arc! ![]() Took me an afternoon to do this project (pissed around alot though) and maybe $10.00 in materials.
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE Last edited by BobbyK; 11-20-2005 at 09:59 PM. |
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