Relentless 2016

[mopar-tech]

Their logic is one large coil is better/more reliable than 8 COP coils, might be something to it as COP coils fail often??

I have not seen much in the way of C.O.P. failures unless there was something else going on like antifreeze in the spark plug well. I would think one coil servicing a single plug would be more desirable than one coil having to charge and fire four cylinders.

Don't mind the back and forth at all, sparks all sorts of ideas.

Attached is shots from the garage, Rampage is finally in the bay for new slugs.

[RattFink]

First off awesome thread! Second, I worked on a fleet of thousands of Ford and Gm trucks for 8 years. I replaced hundreds of ford coil packs, and 2 GM coil packs. I think COP is the way to go just use high quality coils.

[mopar-tech]

I should clear up something- I'm not acually looking at COP ignition but remote coil near plug ignition.

[thedon809]

Chrysler cheaped out on the newer 3.7's. Instead of 6 individual coils they use 3 coils on the driver side cylinders and run 3 plug wires from the 3 coils to the other 3 plugs. More than one way to skin a cat I guess. Nothing is worse than the early 5.7 hemis though.

[Force Fed Mopar]

Dunno if you'd be interested at all, but I have a crank-triggered Megasquirt setup off an RT engine I'm selling that you might be able to use. Need to splice the harness back together (it was cut to remove from the car, not by me), but it's all there. Car was supposedly running on it on a very basic tune.

[bakes]

Just wonder if you can run a 3.0l 3.3- 3.8l l , flex plate with the crank sensor modded into the 3spd case and neon sohc cam sensor and magnet on the 8v cam?

[mopar-tech]

Dunno if you'd be interested at all, but I have a crank-triggered Megasquirt setup off an RT engine I'm selling that you might be able to use. Need to splice the harness back together (it was cut to remove from the car, not by me), but it's all there. Car was supposedly running on it on a very basic tune.

MS 1/2/3?

I might be interested in doing some research with it, I do have another EFI project brewing

[Force Fed Mopar]

MS 1/2/3?

I might be interested in doing some research with it, I do have another EFI project brewing

MS 2, version 3.0 board, has an onboard map sensor.

[mopar-tech]

MS 2, version 3.0 board, has an onboard map sensor.

Perfect.

[GLHS60]

I have not seen much in the way of C.O.P. failures unless there was something else going on like antifreeze in the spark plug well. I would think one coil servicing a single plug would be more desirable than one coil having to charge and fire four cylinders.

Don't mind the back and forth at all, sparks all sorts of ideas.

Attached is shots from the garage, Rampage is finally in the bay for new slugs.

Excellent!!
I'm still fascinated that some E.M. competitors go to the trouble of back dating to dist. and single coil.
Chrysler, Chevy and Ford guys have all done it.

Thanks
Randy

[mopar-tech]

I'm still fascinated that some E.M. competitors go to the trouble of back dating to dist. and single coil.

Have to to keep in mind sometimes the engine masters guys do things for odd reasons based on the rules of the contest.

All the engine has to do is run a half-dozen times on a dyno.

[Ondonti]

I don't think COP is reliable when applied to high performance setups. Heat problems lead to coil failures. Even the coil near plug setups have the downfall of being very expensive. I don't think there are really any "upgrades" available for coil near plug either. Once you hit the limit you have to upgrade to a bunch of coils that were meant for single coil applications. Really spendy on a v8.
If you can get the plug to fire, why worry? As long as you can keep the timing accurate.

When I found out that a lot of the "professional" ECUs out there, including megasquirt pro, require external map sensors, I was disappointed. I don't understand a design like that.

[mopar-tech]

If you can get the plug to fire, why worry? As long as you can keep the timing accurate.

I don't want a distributor, hence coil near plug or coil on plug being my two options.

Lots of guys making far more power than I'm planning (Honda, Toyota, Ford, Benz etc) I'm not worried about availability of coil packs that can do the job.

[mopar-tech]

Popped the head off the Rampage last night with my son. Bores look nice, slider cam not so much. Will get the slugs out today, maybe new ones in. Going to replace slider with a roller while we are in there.

[83scamp]

Popped the head off the Rampage last night with my son. Bores look nice, slider cam not so much. Will get the slugs out today, maybe new ones in. Going to replace slider with a roller while we are in there.

Gary,

Just curious, because you seem to have good luck with this. When you do a piston swap in place, do you hone the bore or anything? I may need to do this to my Scamp next year, and I'm just curious if you do any cylinder wall prep, or just new pistons & rings?

Thanks

[mopar-tech]

Gary,

Just curious, because you seem to have good luck with this. When you do a piston swap in place, do you hone the bore or anything? I may need to do this to my Scamp next year, and I'm just curious if you do any cylinder wall prep, or just new pistons & rings?

Thanks

I bust out the ball hone, 1 minute per cylinder with engine oil, clean up everything well, new rings and pistons.

If you have a ridge on the cylinder of course you are dealing with taper and a fresh bore is required.

[2.216VTurbo]

I bought three ball hones back in the day of various grits but have never really known which one gave the best balance between rough enough to seat new rings and smooth enough to be safe. Do you know which grit yours is?

[83scamp]

I bust out the ball hone, 1 minute per cylinder with engine oil, clean up everything well, new rings and pistons.

If you have a ridge on the cylinder of course you are dealing with taper and a fresh bore is required.

Thanks for the info.

I bought three ball hones back in the day of various grits but have never really known which one gave the best balance between rough enough to seat new rings and smooth enough to be safe. Do you know which grit yours is?

+1. I'm curious as well...

[mopar-tech]

I bought three ball hones back in the day of various grits but have never really known which one gave the best balance between rough enough to seat new rings and smooth enough to be safe. Do you know which grit yours is?

Purchased over 25 years ago, can't say I remember.

[83scamp]

I bust out the ball hone, 1 minute per cylinder with engine oil, clean up everything well, new rings and pistons.

If you have a ridge on the cylinder of course you are dealing with taper and a fresh bore is required.

I bought three ball hones back in the day of various grits but have never really known which one gave the best balance between rough enough to seat new rings and smooth enough to be safe. Do you know which grit yours is?

Looking at several web sites, it is highly dependent on what type of rings you are using. It appears that if you are using a moly faced ring, a 320 grit is recommended. Chrome would require a courser grit.

Here is one of the sources I found: http://www.enginehones.com/technical.html