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  #61  
Old 08-13-2019, 07:59 AM
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I don't buy the type of coil (epoxy, E-core) is what killed it, original GM HEI distributors were using them from the factory.

All the aftermarket HEI modules have a coil recommendation, and all have E-core type coils on the list. Some provide a range of resistance value for their' modules, most coils list their' values.

Of course if you're running an MSD box, you should be running the low resistance bushing, and many recommend it with aftermarket modules. That can't be done in small bodies, because the bushing is integrated with the cap. Solution is to run the MSD replacement caps, or others that have the low resistance bushing. Those all use HEI towers on the cap, so you would know which is which.

Glad you got it figured out Will, did you address the cranking issue too?

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  #62  
Old 08-13-2019, 10:11 AM
TAQuest TAQuest is offline
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It was that stinking clear grease. The simple answer.

  #63  
Old 08-13-2019, 10:12 AM
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This;
Quote:
Originally Posted by grivera View Post
There was a clear greasy substance between housing and old module.

  #64  
Old 08-13-2019, 12:57 PM
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Quote:
Originally Posted by HWYSTR455 View Post
I don't buy the type of coil (epoxy, E-core) is what killed it, original GM HEI distributors were using them from the factory.

All the aftermarket HEI modules have a coil recommendation, and all have E-core type coils on the list. Some provide a range of resistance value for their' modules, most coils list their' values.

Of course if you're running an MSD box, you should be running the low resistance bushing, and many recommend it with aftermarket modules. That can't be done in small bodies, because the bushing is integrated with the cap. Solution is to run the MSD replacement caps, or others that have the low resistance bushing. Those all use HEI towers on the cap, so you would know which is which.

Glad you got it figured out Will, did you address the cranking issue too?

.
Thanks Mike- I haven’t gone past the module at this point.

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'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears
'69 LeMans Vert, 350, #47 heads: Non-running project
  #65  
Old 08-13-2019, 01:39 PM
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Does your distributor cap have HEI tower type plug wire connectors, or the points style?

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http://forums.maxperformanceinc.com/...d.php?t=760624
1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
https://forums.maxperformanceinc.com...ght=procharger
Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be
  #66  
Old 08-13-2019, 04:02 PM
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STEELCITYFIREBIRD STEELCITYFIREBIRD is offline
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Thermal grease comes in many different formulations, some formulations are clear.
Guys like Dave Ray don’t stay in business for 42? years by not knowing what they are doing or talking. The BS business/people come and go

In this world you learn to listen to the older guys that have become experts in their specialty...from real world experience.
I Listen carefully and learn from these experts to greatly increase my knowledge base, supplementing my own personal experience.

When you get to the starter deal Will, if it is still present, don’t hesitate contact me.

  #67  
Old 08-13-2019, 04:43 PM
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Quote:
Originally Posted by HWYSTR455 View Post
Does your distributor cap have HEI tower type plug wire connectors, or the points style?

.
It has a points style cap/connectors

Quote:
Originally Posted by STEELCITYFIREBIRD View Post
Thermal grease comes in many different formulations, some formulations are clear.
Guys like Dave Ray don’t stay in business for 42? years by not knowing what they are doing or talking. The BS business/people come and go

In this world you learn to listen to the older guys that have become experts in their specialty...from real world experience.
I Listen carefully and learn from these experts to greatly increase my knowledge base, supplementing my own personal experience.

When you get to the starter deal Will, if it is still present, don’t hesitate contact me.
Thanks Luke! I'm considering extending the module wires and remote mounting it to a cooler location. This way, if it dies again it's a quick R&R.

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'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears
'69 LeMans Vert, 350, #47 heads: Non-running project
  #68  
Old 08-13-2019, 05:35 PM
TAQuest TAQuest is offline
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Quote:
Originally Posted by STEELCITYFIREBIRD View Post
Thermal grease comes in many different formulations, some formulations are clear.
Guys like Dave Ray don’t stay in business for 42? years by not knowing what they are doing or talking. The BS business/people come and go

In this world you learn to listen to the older guys that have become experts in their specialty...from real world experience.
I Listen carefully and learn from these experts to greatly increase my knowledge base, supplementing my own personal experience.

When you get to the starter deal Will, if it is still present, don’t hesitate contact me.
The clear stuff doesn't have the zinc oxide. Doesn't work as good.

  #69  
Old 08-13-2019, 06:12 PM
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Quote:
Originally Posted by TAQuest View Post
The clear stuff doesn't have the zinc oxide. Doesn't work as good.
What color is this one? https://www.amazon.com/Super-Lube-98...995951197&th=1

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'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears
'69 LeMans Vert, 350, #47 heads: Non-running project
  #70  
Old 08-13-2019, 06:31 PM
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Quote:
Originally Posted by grivera View Post
That one is white and has the fine zinc oxide particles in it. If you go to the manufacturers website it breaks it down for you.
The clear stuff is just silicone without the fine metal particles.

  #71  
Old 08-13-2019, 06:45 PM
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Thanks

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'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears
'69 LeMans Vert, 350, #47 heads: Non-running project
  #72  
Old 08-13-2019, 07:22 PM
Formulas Formulas is offline
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I often thought about putting the module inside the car and on a old PC heat sink still utilizing the little fan on it.

Overkill but interesting

Also PC processor's are/were mounted in the same fashion and use a heat sink paste some high end stuff boasted silver loaded but you can get paste at puter places last I bought was at best buy

.

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Last edited by Formulas; 08-13-2019 at 07:28 PM.
  #73  
Old 08-13-2019, 08:58 PM
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Completely non-Pontiac answer, but does apply to remotely mounted GM HEI modules.....

I modified the distributor in my '52 GMC six cylinder engine by ..
1. Removed the points and condenser from the GMC distributor.
2. Machined the center hole of a mid-70s Chrysler 6 cylinder reluctor wheel to slide down over the GMC distributor's cam that activates the points.
3. Mounted the matching Chrysler magnetic pickup in the GMC distributor.
4. Used about 5-6 feet of 22 gauge twisted pair shielded wire (because the wires were so long, I didn't want any false firing because of electrical noise) to connect the mag pickup to a GM HEI module that I mounted on a heat sink.
5. Mounted the module & heat sink inside a gutted voltage regulator that was mounted on the firewall.
6. Connected the HEI's output back to an MSD Blaster 2 coil (oil filled, 0.7 ohm primary winding).

I used the white heat sink compound. Been working fine for 3+ years of almost daily driving.

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  #74  
Old 08-13-2019, 10:30 PM
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Very creative Bill- I need to identify space in engine compartment

Any suggestions on a quality brand module to buy as a spare?

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'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears
'69 LeMans Vert, 350, #47 heads: Non-running project
  #75  
Old 08-13-2019, 11:46 PM
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Quote:
Originally Posted by grivera View Post
Very creative Bill- I need to identify space in engine compartment

Any suggestions on a quality brand module to buy as a spare?
Mine is just a Speedway 91012338 HEI module, BUT (big but) …
a. being a six cylinder mine fires 25% less times at any given RPM than a V8
b. being a basically stock 228 cubic inch engine from 1952 I doubt I've ever had it to 3000 RPM

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  #76  
Old 08-14-2019, 08:32 AM
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So far, I haven’t run into many complaints or issues with Davis Unified Ignition parts. They do sell a cap / rotor / coil / module ‘kit’ for those that have a solid factory distributor. They also sell those parts individually.

Granted, I don’t put a ton of miles on my cars, but I have a pair of complete DUI HEIs that have been in service for 8+ years with zero issues.

  #77  
Old 10-05-2019, 01:21 PM
David Ray David Ray is offline
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"Dizzy is Dave’s Small Body HEI and coil is Summit brand e-core." Entirely the WRONG coil. That coil is an epoxy filled coil, and NOT the one I recommend, which is a round OIL FILLED coil. The epoxy filled coils run too hot in the core, because epoxy does not transfer heat from a source, it retains it (epoxy is a heat barrier, not a transfer compound), and this helps the coil layer short when it gets hot, and along the way to failure, the coil will fail HEI modules until the coil is changed.

Will, that electrical tester at the better auto parts sore should not only test the coil, but the HEI module as well. If you need more help with it, please contact me at the website email address, or call me. I'll be more than happy to help.

Now, resistance tests of any and all coils are OK for a COLD coil, don't usually tell us much, but, coils don't fail when they are cold, they fail when they get up to operating temperatures, so, unless you can leap out of the car when it stops dead, and rip the hood open to test the hot coil, before it cools off, you aren't going to get an accurate reading of the coil with an ohm meter. The ONLY good way to test a coil is to remove it from the car, and run it on an off vehicle run tester that better parts stores have. But, don't just do a 5 second burst and declare it good, let it run, get it up to temperature, and see what goes there.

Also, for one of my conversions, if the fuse box has an IGN or IGNITION terminal, hot in both start and run, cold everywhere else, a simple 12 gauge wire through the firewall from it, to the positive terminal on the coil is the only power up needed. Some have done this with a 14 gauge wire, with NO adverse issues. This method allows leavng the resistor wire set in place, but disconnected, taped off and run along the wiring loom, without altering the wires, nor wiring loom.

  #78  
Old 10-05-2019, 01:52 PM
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Thanks Dave - when I replaced the ignition module I also reinstalled the oil filled coil you sold me. So far it's running well but I did relocate the ignition module to the firewall and carry a spare just in case!

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'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears
'69 LeMans Vert, 350, #47 heads: Non-running project
  #79  
Old 10-05-2019, 01:56 PM
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Dave, help me understand, so your modules are different than any other HEI module? Reason I ask is, GM, as well as any replacement in-cap HEI coil in fact is an E-core type coil. I have never seen an in-cap HEI coil that was oil filled?

The only mismatch issues that I recall are from an era that the coils would not saturate enough above a certain RPM?


.

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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
http://forums.maxperformanceinc.com/...d.php?t=760624
1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
https://forums.maxperformanceinc.com...ght=procharger
Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be
  #80  
Old 10-06-2019, 01:22 PM
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Great info, subscribed.

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