HEI Installation and I got to thinking ???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

indyracer · 06-26-2007, 09:02 AM

Could you put a relay in for the 12volt power wire to the HEI? I can't come up with a good reason why you would want to, but it crossed my mind this weekend.

Goes something like this:

Battery to relay
Relay to HEI
Unfused or fused "on with ignition" terminal to relay

Key on, power to relay causes power to HEI.

Like I said, I can't think of a good reason to do this. Sometimes I just like to invent things to do for the sake of doing them.

shifty · 06-26-2007, 09:29 AM

you could totally do it, but your coil doesn't require a heavy gauge wire, it doesn't lose much of any power from going from batt->bulkhead->coil, so...i think it would convolute your wiring more than help it.

indyracer · 06-26-2007, 09:32 AM

I was kind of thinking the same thing. If the coil doesn't require much in the way of amps it really is just more wiring. Like I said, I was just thinking if there was a reason it wouldn't work.

Longhorn Man · 06-26-2007, 05:24 PM

if you were reving to 7000 RPM, this would be the way to do it.
For street drivers, there is no need.

HOWEVER, if you have a butt load of things going to the Ign Unfused, then a relay turned on by that terminal, wired to a small Aux fuse box would be a great idea.

06-26-2007, 09:02 AM	#1
indyracer Registered User Join Date: Jul 2006 Location: Alexandria, IN Posts: 134	HEI Installation and I got to thinking ???? Could you put a relay in for the 12volt power wire to the HEI? I can't come up with a good reason why you would want to, but it crossed my mind this weekend. Goes something like this: Battery to relay Relay to HEI Unfused or fused "on with ignition" terminal to relay Key on, power to relay causes power to HEI. Like I said, I can't think of a good reason to do this. Sometimes I just like to invent things to do for the sake of doing them. __________________ Cheers, Tony A day without sunshine is like, you know, night. 1970 Chevy CST10 (Green) 2005 Silverado Z71 2000 Pontiac Bonneville

06-26-2007, 09:29 AM	#2
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Re: HEI Installation and I got to thinking ???? you could totally do it, but your coil doesn't require a heavy gauge wire, it doesn't lose much of any power from going from batt->bulkhead->coil, so...i think it would convolute your wiring more than help it. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

06-26-2007, 09:32 AM	#3
indyracer Registered User Join Date: Jul 2006 Location: Alexandria, IN Posts: 134	Re: HEI Installation and I got to thinking ???? I was kind of thinking the same thing. If the coil doesn't require much in the way of amps it really is just more wiring. Like I said, I was just thinking if there was a reason it wouldn't work. __________________ Cheers, Tony A day without sunshine is like, you know, night. 1970 Chevy CST10 (Green) 2005 Silverado Z71 2000 Pontiac Bonneville

06-26-2007, 05:24 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: HEI Installation and I got to thinking ???? if you were reving to 7000 RPM, this would be the way to do it. For street drivers, there is no need. HOWEVER, if you have a butt load of things going to the Ign Unfused, then a relay turned on by that terminal, wired to a small Aux fuse box would be a great idea.



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