Previous Thread
Next Thread
Print Thread
Page 3 of 3 1 2 3
Re: Better than stock ECU for direct replacemnt hot street car? [Re: Dave_J] #2721655
12/05/19 12:41 PM
12/05/19 12:41 PM
Joined: Jan 2007
Posts: 947
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 947
Badham Co.
Originally Posted by Dave_J
Here is my finished unit. I went with a $10 HEI just to see if this works. I may step up to a better HEI module later. Not counting the Autozone failed ECM, I am into this for less than $15. Used 4 pieces of 14 gauge wire, 4 crimp spade ends, a smeer of Heat Sink paste, 1 each 1 inch 8X32 screw, a shot of Rustoluim 2X paint and the the HEI module.

On the fake Transistor cap I had to re-tap the one screw hole for the HEI module's through bolt, the two original screws were metric and I reused only 1. When retapping, only go in far enough for the new screw to be tight. I ran the tap down all the way and had to peen the back side threads a bit
Same thing I did but I did drill a hole for the second mounting screw for the gm module. The module gets grounded thru those screws. I just ground down the screw and used some black paint to hide the screw from the front.

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Y3 70 BEE] #2721722
12/05/19 03:20 PM
12/05/19 03:20 PM
Joined: Jan 2007
Posts: 947
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 947
Badham Co.
Here are 2 different 4 pin modules and they ground thru the hole on the right. Not sure if all ground like that but I cut open a 1970s AcDelco module and it only grounded thru the one bolt hole. I would put a screw in that empty hole on yours.

f1bf69f6-4e6a-43b1-8962-089bfd62e94a_1.4a04ebd722cfa75a1826e4dba838b3a2.jpg35361.jpg
Re: Better than stock ECU for direct replacemnt hot street car? [Re: NachoRT74] #2721749
12/05/19 04:42 PM
12/05/19 04:42 PM
Joined: May 2019
Posts: 1,414
nowhere
S
Sniper Offline
pro stock
Sniper  Offline
pro stock
S

Joined: May 2019
Posts: 1,414
nowhere
Originally Posted by NachoRT74
Isn't posible to use the plugs for safety isolation whicth chassis ?



Be easier to use heat shrink over the spade terminals than try to fit two big plastic housings in there I would think.

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Sniper] #2721775
12/05/19 05:55 PM
12/05/19 05:55 PM
Joined: Sep 2003
Posts: 13,111
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 13,111
north of coder
Originally Posted by Sniper
Originally Posted by NachoRT74
Isn't posible to use the plugs for safety isolation whicth chassis ?



Be easier to use heat shrink over the spade terminals than try to fit two big plastic housings in there I would think.


way better with the heat shrink. overcrowding with using the connectors will affect wire routing.
beer

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Y3 70 BEE] #2721776
12/05/19 05:56 PM
12/05/19 05:56 PM
Joined: Jan 2003
Posts: 3,122
Auburn WA
Dave_J Offline
master
Dave_J  Offline
master

Joined: Jan 2003
Posts: 3,122
Auburn WA
Originally Posted by Y3 70 BEE
Here are 2 different 4 pin modules and they ground thru the hole on the right. Not sure if all ground like that but I cut open a 1970s AcDelco module and it only grounded thru the one bolt hole. I would put a screw in that empty hole on yours.

When you flip the HEI module over it has an aluminum pad and both those holes are swedged. I will check it with my Fluke VOM to see.
But I may put a copper strap between the two bolt holes as a "Just Because".

I could drill thru the steel of the OEM ECU and TIG weld a Stainless machine tapered head screw on and then fine grind the head on the front. Once its painted you'd never know.
IF I were building these to sell, that is what I'd do. The vendor "WELLS" that is making these for Autozone and NAPA should copy this mod for all the units they sell. I'd bet their failure return rate would drop.


Retired, US ARMY 1973-1994
ASE mechanic, Electrical 1994-1997
Retired GTE/VERIZON/FRONTIER 1997-2015


Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.

03 Suzuki Burgman 650(Burger King) Scooter
65 Formula S Cuda
78 Little Red Express Truck
98 Buick Regal (wifes car)
Re: Better than stock ECU for direct replacemnt hot street car? [Re: Dave_J] #2721786
12/05/19 06:24 PM
12/05/19 06:24 PM
Joined: Jan 2003
Posts: 3,122
Auburn WA
Dave_J Offline
master
Dave_J  Offline
master

Joined: Jan 2003
Posts: 3,122
Auburn WA
These are the Cheap RockAuto $10 HEI modules. Others may be different. The two brass hollow rivets are swedged and have the same OHM reading to the alumiumn plate on the bottom (Pic 2). I also ground off the two plastic locating dowel pins on the bottom so it sets flat to the ECU. There is real Heat Sink paste under this module.

The screw on the ECU's empty hole is a good ground to the fake Transistor cap and then the second screw through to the HEI module is grounded well too. Just make sure the OEM ECU is grounded well.

Cheap HEI Front.jpgCheap HEI Rear.jpg

Retired, US ARMY 1973-1994
ASE mechanic, Electrical 1994-1997
Retired GTE/VERIZON/FRONTIER 1997-2015


Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.

03 Suzuki Burgman 650(Burger King) Scooter
65 Formula S Cuda
78 Little Red Express Truck
98 Buick Regal (wifes car)
Re: Better than stock ECU for direct replacemnt hot street car? [Re: Dave_J] #2721813
12/05/19 07:33 PM
12/05/19 07:33 PM
Joined: Jan 2007
Posts: 947
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 947
Badham Co.
Just drill a hole and grind down the exposed screw end and add a dab of paint.

WP_20190406_16_31_08_Pro.jpg
Page 3 of 3 1 2 3




Powered by UBB.threads™ PHP Forum Software 7.7.1