(If I have this correct) Its basicly a way to make the 28 pins chip behave like a 24 pin chip.
(If I have this correct) Its basicly a way to make the 28 pins chip behave like a 24 pin chip.
79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy
93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver
99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.
Yup!
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Did this upgrade last night and it worked great. Thanks for posting this!
I definitely recommend getting the solder sucker to clean out the old solder or you will never get the ZIF socket in the holes.
86 Jeep Grand Wagoneer
Stock AMC360 with HEI
There's three ways to do things, the right way, the wrong way and the way that I do it.
- Robert De Niro (Casino)
I like using a 24 pin DIP socket right on the daughter board, then plugging the adapter into it. I use 28 pin DIP sockets for the adapter, with an SST27SF512, the cover just touches the EEPROM. Usually when you're at the point of using a ZIF socket, you just leave the cover off, for the quick changes while tuning.
I usually don't use a ZIF socket when tuning other people's vehicles, don't want the EEPROM to accidentally fall out and have issues.
The man who says something is impossible, is usually interrupted by the man doing it.
So I am verifying this before I start soldering the parts into my board. Do the last 4 pins on the ZIF socket (The ones the new wire is soldered to) need to be cut shorter to clear the board. And the 5th pin does not get cut shorter and gets soldered back into the original hole on the board?
I would get a g2 adapter.
The bottom 24 pins do not get cut.Originally Posted by southforkcnc
dave w
Plan to try the 27SF512 Flash Chip conversion in a '7747 ECM. Just picked up some .001 brass shim material and used a straight pin to punch leg holes in a small piece. Just push the legs over and the solder goes on real nice. When soldered hardly any socket lift on the bottom at all.
Have .002, .003 and .005, but feel confident using the .001
Ed
I'm thinking I might have miss communicated which pins get cut. Only pins 1, 2, 27, and 28 are cut. From what I can see in the posted pic, pin 26 appears cut?
The (Zero Insertion Force) ZIF sockets with a lever are the SUPERIOR design for holding a chip, and the only ZIF socket I would ever consider using in an ECM!
I'm thinking that 0.001" thickness is adequate for the 27SF512 conversion. I would use some electrical tape to insulate the bass from the ECM circuit board.
dave w
Dave
How does it look now? Used some truck bed liner as an insulator..it's hard and tough.
Ed
Last edited by EDZIP; 08-15-2013 at 05:39 PM.
Unless you're soldering it directly to the daughter board, you don't need to insulate it.
I prefer to solder a 24 pin DIP socket to the daughter board, then stack a modified DIP socket on top.
The man who says something is impossible, is usually interrupted by the man doing it.
I think that will work. I'm not in favor of the dip socket that has been selected, not positive locking enough for my standards.
dave w
I agree, I now use machined pin DIP sockets.
The man who says something is impossible, is usually interrupted by the man doing it.
My primary concern is correct pin assignments right now. I can always attach a cork block between the prom and cover to secure the prom. Considering these latch type DIP sockets...low profile and secure prom.
Posting Permissions
Reply With Quote
Bookmarks