What efi system is best for a 4.5 pfi cadillac engine7

[dave w]

If you have excellent soldering skills and equipment, installing a 28 Pin DIP Socket into the Memcal is a low cost alternative to the Moates.net G1 adapter.

dave w

[S.O.B.B.]

Awesome.thanks.that was a memcal from another ecm I had for a quad 4. Looks same as 7427 so that was my practice run.that will shave a bit off of getting into tuning for me.I priced a gqx4 and 2 sst27sf512 chips.about $170. Canadian delivered so that's not too bad.would have gotten burn 2 but it's a bit more money so as u can see I like to make it cheap.thanks for the confirmation.have a great day

[stew86MCSS396]

I've done that before but I didn't have a fine tip soldering iron so needless to say, mine didn't come out as pretty as the one you have in the pics. Just to pretty it up, I think I'll pull out the dremel an clean up the melted plastic!!! BTW...I also used a zif.

[S.O.B.B.]

I melted a few spots too but it's hard to see.believe it or not that's done with a butane torch similar to what a chef uses only it has a few tips.it's very fast and does pretty clean job for wires and such and shrink tube.I made my cable for data log with it and the thing works great even on tiny pins like the transistors and resistors needed for that.it was under 40 bucks.good to know others do these things too .

[dave w]

I once read a story where someone set out to cut a piece of wood. As the story goes ... the wood was measured with a micrometer, then marked with a piece of chalk and finally cut with a chain saw. The above method of soldering reminded me of the this story.

Electrons are extremely "LAZY" things to control ... they will always flow in the path of least resistance from negative to positive.

Maybe it's my luck, I seen to need a more costly method of soldering to keep those "LAZY" electrons happy for years and years / miles and miles of trouble free service.

I truly admire those who can make a perfectly level wood table with a micrometer, chalk, and chain saw.

dave w

[S.O.B.B.]

Hey thanks.that means a lot to me.I've done about 6 conversions on odd ball vehicles with somewhat odd drive train.I've about ways hated the wiring part.but this last one refined a lot of skills for me including soldering and following wires and wire diagrams and relays and circuits etc.partly because I made a few mods and because of my mistakes.but I feel like I have most of this system in my head by memory.I'm hoping I'll be able to learn the tuning in the same manner.understanding the wiring makes diagnosis much easier less frustrating and not scary at all to try and check any circuit.I would hope at some point others could use info I have learned because that's how I've learned a lot.thanks to this and many other info sharing enthusiasts. So thanks

[S.O.B.B.]

Ordered:
Gq-4x-v4 $114.28
Sst27sf512(x2) $10.04
Shipping $25.40
Total to my door $149.72
That's not too bad for getting started.that's from mcu mall canada. Gq electronics is the American store and prices are pretty close.my canadian store has a 2 week wait for the chips as they are back ordered.I see they are not on back order in the American store.in case anyone uses them.

[S.O.B.B.]

Hello Dave w.I was finally able to get to see the files u sent for mpfi 7427.I have loaded a bin bjya I think.then loaded the od xdf.I was going threw it changing things I know to change.initial timing to 10° and a few of the things it said to set for pfi.my question is the main spark.I looked at the main spark for ns1 xdf.I dont know if that us even a 4.5L bin or if its n*.quite different. Do I cut and paste the spark table or copy the parameternal and delete the one that was there.I'm just trying to make the changes I think are needed and figure out how to post my data logs and xdf so u or someone could tell me if I'm doing the right things or if I'm not.I'm unsure if I have the correct info for 4.5 settings but I am more so wanting to know.is that the way one would for example swap a timing table and initial to run a different engine on an ecm mentioned for truck.thanks

[dave w]

Hello Dave w.I was finally able to get to see the files u sent for mpfi 7427.I have loaded a bin bjya I think.then loaded the od xdf.I was going threw it changing things I know to change.initial timing to 10° and a few of the things it said to set for pfi.my question is the main spark.I looked at the main spark for ns1 xdf.I dont know if that us even a 4.5L bin or if its n*.quite different. Do I cut and paste the spark table or copy the parameternal and delete the one that was there.I'm just trying to make the changes I think are needed and figure out how to post my data logs and xdf so u or someone could tell me if I'm doing the right things or if I'm not.I'm unsure if I have the correct info for 4.5 settings but I am more so wanting to know.is that the way one would for example swap a timing table and initial to run a different engine on an ecm mentioned for truck.thanks

It's going to be VERY CHALLENGING setting up the $OD MPFI .bin for the 4.5 MPFI conversion. You will need to interpolate the 4.5 parameters into the $OD MPFI modified .bin file. Take is slow, understand EXACTLY what your changing. You will need to CLOSELY RECONCILE the Injector Parameter, Timing Parameters, and Fuel Parameters. The only easy parameters to swap into the $OD 4.5 liter MPFI .bin file will be displacement and injector flow.

dave w

[S.O.B.B.]

1st.xdl
Tunerpro rt data log from 7747 asdm on 4.5 engine with tbi and 4.3 injectors. Can someone please tell me if the xdl posted here is the correct format for someone on here to view it.thanks