Previous Thread
Next Thread
Print Thread
Page 2 of 3 1 2 3
Re: Better than stock ECU for direct replacemnt hot street car? [Re: Cab_Burge] #2719672
11/27/19 10:14 AM
11/27/19 10:14 AM
Joined: Jan 2003
Posts: 17,801
S.E. Michigan
ZIPPY Offline
I Live Here
ZIPPY  Offline
I Live Here

Joined: Jan 2003
Posts: 17,801
S.E. Michigan
Cab we've been talking on these boards for 20 years or more, but I have to admit I don't know how much of a purist you are.
Maybe I'm not too observant LOL.
If you have to have a mopar style ecu then don't read any further.

For non-msd type applications, since giving it a whirl I have become a big fan of the GM HEI module + Ford TFI coil combination,
triggered by a regular Mopar electronic distributor.

I liked it enough to start a thread about it:
click to read thread about ignition

The coil is Std Motor products FD478T or equivalent.
1990 F150 with a 351 would be the application.
The ignition module would be a std motor product LX301 or equivalent.
1979 Corvette 350 would be the application.

Together they will run about $30.

It's no MSD, but it makes a pretty strong spark: https://www.youtube.com/watch?v=3iYv4H26SRs&feature=youtu.be


Rich H.

Esse Quam Videri




Re: Better than stock ECU for direct replacemnt hot street car? [Re: ZIPPY] #2719680
11/27/19 10:32 AM
11/27/19 10:32 AM
Joined: May 2019
Posts: 6,174
nowhere
S
Sniper Offline
master
Sniper  Offline
master
S

Joined: May 2019
Posts: 6,174
nowhere
Originally Posted by ZIPPY
Cab we've been talking on these boards for 20 years or more, but I have to admit I don't know how much of a purist you are.
Maybe I'm not too observant LOL.
If you have to have a mopar style ecu then don't read any further.

For non-msd type applications, since giving it a whirl I have become a big fan of the GM HEI module + Ford TFI coil combination,
triggered by a regular Mopar electronic distributor.

I liked it enough to start a thread about it:
click to read thread about ignition

The coil is Std Motor products FD478T or equivalent.
1990 F150 with a 351 would be the application.
The ignition module would be a std motor product LX301 or equivalent.
1979 Corvette 350 would be the application.

Together they will run about $30.

It's no MSD, but it makes a pretty strong spark: https://www.youtube.com/watch?v=3iYv4H26SRs&feature=youtu.be




This is pretty much what I am doing with my 51 Plymouth. I will be building an electronic ignition distributor for it using a /6 distributor as the basis with the rest as you describe. We will see how it goes. I'll be documenting it on my webpage and will post in the project forum.

Re: Better than stock ECU for direct replacemnt hot street car? [Re: ZIPPY] #2719717
11/27/19 12:31 PM
11/27/19 12:31 PM
Joined: Sep 2003
Posts: 19,239
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,239
north of coder
Zippy, it's a good thing your battery didn't have any outgassing going on, or you could have seen a big ball of fire instead of a hot spark !
that is NO place to check spark out put ! tsk have you ever seen a battery blow up ?

PLEASE GUYS. DON'T have, or cause HOT SPARKS AROUND BATTERIES !
you were VERY LUCKY this time, but next ?

sorry for the rant, but SAFETY FIRST !

next time, use the intake manifold or head bolt the negative cable attaches to.

rant over.
beer

Re: Better than stock ECU for direct replacemnt hot street car? [Re: moparx] #2719761
11/27/19 02:52 PM
11/27/19 02:52 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline OP
I Win
Cab_Burge  Offline OP
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
Originally Posted by moparx
Zippy, it's a good thing your battery didn't have any outgassing going on, or you could have seen a big ball of fire instead of a hot spark !
that is NO place to check spark out put ! tsk have you ever seen a battery blow up ?
PLEASE GUYS. DON'T have, or cause HOT SPARKS AROUND BATTERIES !
you were VERY LUCKY this time, but next ?
sorry for the rant, but SAFETY FIRST !
next time, use the intake manifold or head bolt the negative cable attaches to.
rant over.
beer
iagree
I had a Sears Diehard explode in a 1962 Plymouth Fury I use to own, it ruptured the top and spewed acid all over the left side of the engine compartment and on the bottom of the hood, some leaked out onto the front fender also puke
I had stopped for gas and the original alternator regulator was malfunctioning over charging the battery at 30 amps for over a hour. I shut the car off and when I went to restart it, it had flooded some from the heat under the hood, it was in the Mojave desert in mid May and once the motor started to catch it backfire through the carb and the air cleaner inlet tube (it was a later air cleaner for a 1969 C body) was directly over the battery and the fumes form the over charged battery went BOOM shock
I hate Murphy rant


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Better than stock ECU for direct replacemnt hot street car? [Re: Cab_Burge] #2720385
11/30/19 04:42 AM
11/30/19 04:42 AM
Joined: Jan 2003
Posts: 3,122
Auburn WA
Dave_J Offline
master
Dave_J  Offline
master

Joined: Jan 2003
Posts: 3,122
Auburn WA
OK, I took my last failed 4 pin ECU and submerged it in boiling water a few times and was able to pry out all of the epoxy potting. Under was a PCB with what Kind of looked like what an HEI module looks like under its plastic. It was embedded in silica sand and epoxy too. Guess what? NO wires going to the 'Transistor' Cap mounted on the aluminum heat sink. There is a plastic sealing ring under the cap but not drilled for wires. Its a dummy.
We got this last one from Autozone. Duralast CR109. "Duralast products are engineered and manufactured by Wells Vehicle Electronics"

Posted on FABO too.


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] #2720386
11/30/19 06:23 AM
11/30/19 06:23 AM
Joined: Apr 2014
Posts: 129
SE Indiana
K
kowalski440 Offline
member
kowalski440  Offline
member
K

Joined: Apr 2014
Posts: 129
SE Indiana
A pic or two would be appreciated?

Re: Better than stock ECU for direct replacemnt hot street car? [Re: kowalski440] #2720405
11/30/19 10:20 AM
11/30/19 10:20 AM
Joined: May 2019
Posts: 6,174
nowhere
S
Sniper Offline
master
Sniper  Offline
master
S

Joined: May 2019
Posts: 6,174
nowhere
Motorola used to make that power transistor. They don't anymore and there isn't a good replacement. There is a sort of usable substitute (with all the issues noted by others) that you can find occasionally but by now most of the have a dummy cap and surface mounts electronics inside. Problem is they are not adequately heat sunk.

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Dave_J] #2720446
11/30/19 02:10 PM
11/30/19 02:10 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
I will try to take pictures of how I do my mod.

I plan on cutting the ECM's tin case under the OEM looking aluminum heat sink and then using some 1/16 inch solid copper sheet to cut out a mount for the GM HEI module that is slightly larger than the cut out in the tin case. I will use two tapered head 8x32 screws to mount that copper sheet to the back of the OEM heat sink with heat sink jelly and fake Trans cap. Then two of the same screws to mount the HEI module with that jelly to the underside of the module to copper sheet.

This should wick away all the heat into the OEM looking aluminum heat sink.


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] #2720452
11/30/19 02:39 PM
11/30/19 02:39 PM
Joined: Jan 2003
Posts: 15,194
Omaha Ne
T
TJP Offline
I Live Here
TJP  Offline
I Live Here
T

Joined: Jan 2003
Posts: 15,194
Omaha Ne
Originally Posted by Dave_J
OK, I took my last failed 4 pin ECU and submerged it in boiling water a few times and was able to pry out all of the epoxy potting. Under was a PCB with what Kind of looked like what an HEI module looks like under its plastic. It was embedded in silica sand and epoxy too. Guess what? NO wires going to the 'Transistor' Cap mounted on the aluminum heat sink. There is a plastic sealing ring under the cap but not drilled for wires. Its a dummy.
We got this last one from Autozone. Duralast CR109. "Duralast products are engineered and manufactured by Wells Vehicle Electronics"

Posted on FABO too.


up eek whistling bow shock LOL

Re: Better than stock ECU for direct replacemnt hot street car? [Re: TJP] #2720749
12/01/19 07:16 PM
12/01/19 07:16 PM
Joined: Jan 2007
Posts: 953
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 953
Badham Co.
I used a heat gun to gut a old 70s ECU box. Then put a 4 pin GM module in the box. I epoxied the pins for the factory ECU then soldered wires to the pins and ran the wires to the module. I fitted the module in the Mopar ECU and used one of the transistor mounting screws and drilled a hole for another screw to mount it, use heat sink compound between the module and case. After I got it together I used the Right Stuff rtv to seal the backside of the factory ECU connector were I soldered and epoxied the wires. 2500 miles and works great..

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Y3 70 BEE] #2720754
12/01/19 07:31 PM
12/01/19 07:31 PM
Joined: Jan 2007
Posts: 953
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 953
Badham Co.

HEI.jpg
Re: Better than stock ECU for direct replacemnt hot street car? [Re: Y3 70 BEE] #2720843
12/02/19 10:24 AM
12/02/19 10:24 AM
Joined: Dec 2004
Posts: 2,362
Wheatfield, NY
Cuda340 Offline
top fuel
Cuda340  Offline
top fuel

Joined: Dec 2004
Posts: 2,362
Wheatfield, NY
Originally Posted by Y3 70 BEE


That's cool!!!!

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Y3 70 BEE] #2720850
12/02/19 11:02 AM
12/02/19 11:02 AM
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
Mattax Offline
top fuel
Mattax  Offline
top fuel

Joined: Feb 2010
Posts: 1,645
Phila. Pa.
Intead of soldering direct, use a terminal on each wire.
That way the HEI module can be changed out easily.

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Mattax] #2720954
12/02/19 05:32 PM
12/02/19 05:32 PM
Joined: Jan 2007
Posts: 953
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 953
Badham Co.
I used female push on connectors on 3 of 4 terminals and soldered 1 of them. I mounted mine a bit different in the case than that pic, its a tight fit mounting it in the Chrysler ECU. I totally removed the old circuit board, leaving the plastic connector backside and the terminal pins. I hade to epoxy the backside of the plastic connector after soldering the wires to the pins. After the epoxy cured I used the Right Stuff rtv to seal up the back of the plastic connector. The factory ECU case is a good heat sink for the GM module, just use the white paste heat sink compound not the clear silicone paste that some use.

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Y3 70 BEE] #2720994
12/02/19 08:05 PM
12/02/19 08:05 PM
Joined: Jan 2007
Posts: 953
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 953
Badham Co.
I call it The Hillbilly Rev a Nator.

Re: Better than stock ECU for direct replacemnt hot street car? [Re: Y3 70 BEE] #2721086
12/03/19 08:01 AM
12/03/19 08:01 AM
Joined: Aug 2007
Posts: 6,089
Valencia, España
NachoRT74 Offline
master
NachoRT74  Offline
master

Joined: Aug 2007
Posts: 6,089
Valencia, España
After the A688 FBO module was not anymore available ( due the Standard Motor productions move ), GREAT MODULE BTW, Don began to make the HR688 module, which was found applied the same, hide a HEI module into a Mopar "look a like" housing ( similar to the actual HHR688 ). This was found by a customer member of some of the Mopar boards I'm member when got the HR688 failed. I felt this like a scam or cheat. When my A688 module failed ( somehow under warranty time ) and got offered to be replaced by the HR688 which was available by those days I simply denied to get a fancy box with an HEI Module inside, which I can make by myself with one of the stock module boxes I have and getting the module cheaper at any shop, even locally in Venezuela. Maybe some performance HEI Module, and still cheaper. So simply got a credit from him to get another product ( got custom made pushrods ) to make valid the warranty. This was around 10 years ago.

Then he released the HHR688, which seems to be a nice one and engineered from the begining maybe. He gets a good customer service, nice reference information for tune up and is a nice guy, but that situation really got me shocked.

I still have the damaged A688 module in hands, hoping someday get it fixed ( Maybe by Don itself ), and get it as spare while I'm running the Rev-N-Nator


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: Better than stock ECU for direct replacemnt hot street car? [Re: NachoRT74] #2721217
12/03/19 06:43 PM
12/03/19 06:43 PM
Joined: Jan 2007
Posts: 953
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 953
Badham Co.
I used the cheap Wells module. Never tried the higher priced ones, so I can't say if they are better. I also use a older distributor cap with the ribs in it. So far the cap and rotor have held up well. Those new caps are cheap crap.

Re: Better than stock ECU for direct replacemnt hot street car? [Re: kowalski440] #2721538
12/05/19 12:01 AM
12/05/19 12:01 AM
Joined: Jan 2003
Posts: 3,122
Auburn WA
Dave_J Offline
master
Dave_J  Offline
master

Joined: Jan 2003
Posts: 3,122
Auburn WA
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

Done 1.jpgDone 2.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] #2721572
12/05/19 07:19 AM
12/05/19 07:19 AM
Joined: Aug 2007
Posts: 6,089
Valencia, España
NachoRT74 Offline
master
NachoRT74  Offline
master

Joined: Aug 2007
Posts: 6,089
Valencia, España
Isn't posible to use the plugs for safety isolation whicth chassis ?

[Linked Image]


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: Better than stock ECU for direct replacemnt hot street car? [Re: NachoRT74] #2721577
12/05/19 07:48 AM
12/05/19 07:48 AM
Joined: Nov 2003
Posts: 10,228
Colleyville
3hundred Offline
I Live Here
3hundred  Offline
I Live Here

Joined: Nov 2003
Posts: 10,228
Colleyville
Originally Posted by NachoRT74
Isn't posible to use the plugs for safety isolation whicth chassis ?

[Linked Image]


It is possible, a GM internal regulator alternator plug works on one side of the HEI module, both are 1/4" spades, on the other side one is 1/4" and one 3/16" spade. The only connector I could find was the pigtail of a GM pickup coil.

Robert


'68 Fury Convertible
'69 300 Convertible
'15 Durango 5.7 Hemi
'16 300 S Hemi
Page 2 of 3 1 2 3






Powered by UBB.threads™ PHP Forum Software 7.7.1