Ready to yank out HEI - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dwaite72lnghrn · 06-17-2003, 06:49 AM

Quick note besure to check the ground wires! Electronics don't work well with bad grounds. Just moving parts or the distributor could get a good bond that time oxidizes or oil stops. Run a wire to the hold down clamp to a good ground.just my 2cents

Yellow Cheyenne · 06-17-2003, 09:32 AM

Heat sink grease is not to insulate the module from the distributor. It is designed to help conduct the heat from the module to the distributor. Without the grease or any form of heat sink, the module would burn up in a short amount of time.

Randy

vfrdude · 06-17-2003, 04:19 PM

The purpose of the dielectric grease is to dissipate heat from the module to the distributor housing... without the grease the ignition module will fry....

ddsmith · 06-17-2003, 04:29 PM

Yellow Cheyenne and vfrdude thanks for the clarification. I knew it was needed just had a misunderstanding of purpose. That is why this board is great. I think I actually knew the right answer at one time but that was several books ago. You know my bookself is full. If I add a new book(something I've learned) one of my old books(something I use to know) falls off the shelf. To bad I can't add a bigger hard drive in my head.

jimfulco · 06-20-2003, 04:30 PM

One good thing about points, they won't make you walk without telling you about it first.

*Phillip Johnson* · 06-22-2003, 12:48 AM

Got a NEW HEI this weekend.. Im happy now

JayDubBlazer · 06-22-2003, 10:59 AM

Could someone give an expanded explaination of the resistor wire. Wat does it do?

Project1970 · 06-22-2003, 11:16 AM

It drops the 12V down to I believe 7V for the old points coil. Since the HEI needs a solid 12V source, it should be disconnected and/or removed.

dwaite72lnghrn · 06-22-2003, 12:02 PM

The resistor wire does drop the voltage but I believe the main object is to set the current(amps) level running through the coil. If you put a staight wire from the battery to the coil you would burn out the coil quickly and the points would burn much faster. The old mopar and ford used a ballast resistor right on the coil, A big square ceramic type wire wound resistor.

GMC Jim · 06-23-2003, 05:35 AM

i believe the resistor wire should drop the voltage to 9.6 volts.......Jim

06-17-2003, 06:49 AM	#26
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Quick note besure to check the ground wires! Electronics don't work well with bad grounds. Just moving parts or the distributor could get a good bond that time oxidizes or oil stops. Run a wire to the hold down clamp to a good ground.just my 2cents __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

06-17-2003, 09:32 AM	#27
Yellow Cheyenne Registered User Join Date: Jun 2001 Location: Eastern Kansas Posts: 488	Heat sink grease is not to insulate the module from the distributor. It is designed to help conduct the heat from the module to the distributor. Without the grease or any form of heat sink, the module would burn up in a short amount of time. Randy __________________ '72 Cheyenne. AC, PS, PB, Rear slider window, tilt. Light yellow (grapefruit yellow according to new sales literature from '72) '56 Chevy short step V-8 (My dad bought it new!!) '70 Olds 442 convertible '70 Olds Rallye 350

06-17-2003, 04:19 PM	#28
vfrdude Registered User Join Date: May 2002 Location: Oakley, Ca. USA Posts: 137	The purpose of the dielectric grease is to dissipate heat from the module to the distributor housing... without the grease the ignition module will fry.... __________________ Rudy Fierros '95 Honda VFR750F Used to have a '71 Chevy Stepside, Guards Red, Lowered 4" rear, 3" front, White Oak bed wood, 700R4 w/373 gears until some low life stole it!

06-17-2003, 04:29 PM	#29
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	Yellow Cheyenne and vfrdude thanks for the clarification. I knew it was needed just had a misunderstanding of purpose. That is why this board is great. I think I actually knew the right answer at one time but that was several books ago. You know my bookself is full. If I add a new book(something I've learned) one of my old books(something I use to know) falls off the shelf. To bad I can't add a bigger hard drive in my head. __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

06-22-2003, 10:59 AM	#32
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,883	Could someone give an expanded explaination of the resistor wire. Wat does it do? __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

06-20-2003, 04:30 PM	#30
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	One good thing about points, they won't make you walk without telling you about it first.

06-22-2003, 12:48 AM	#31
Phillip Johnson Account Suspended Join Date: Apr 2000 Location: Grants Pass, Oregon Posts: 1,579	Got a NEW HEI this weekend.. Im happy now

06-22-2003, 11:16 AM	#33
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	It drops the 12V down to I believe 7V for the old points coil. Since the HEI needs a solid 12V source, it should be disconnected and/or removed. __________________ Project1970 - LS1 Swap Complete!

06-22-2003, 12:02 PM	#34
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	The resistor wire does drop the voltage but I believe the main object is to set the current(amps) level running through the coil. If you put a staight wire from the battery to the coil you would burn out the coil quickly and the points would burn much faster. The old mopar and ford used a ballast resistor right on the coil, A big square ceramic type wire wound resistor. __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

06-23-2003, 05:35 AM	#35
GMC Jim Senior Member Join Date: Dec 2002 Location: Portland, Oregon Posts: 901	i believe the resistor wire should drop the voltage to 9.6 volts.......Jim __________________ '71 GMC;fleetside;PB/PS/AC/CC/402 Eng./Custom Paint/110,000act miles/3 fuel tanks(52gal).

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