COP 4 cylinder - 924s/944 & other content - Very Long Po

[brentp]

Thank you Dean! You are too kind. Just keep spreading the word. There will be a lot to see from Autosport Labs in 2010!

[Dean924s]

So what is everyone doing with plugs once you swap over to the EDIS?

I had a set of Bosch coppers (race plugs) I had pulled them out and put in a set of NGK's that were for my car. I opened up the gap to the escort size. I think .052 if I remember correctly. Anyway the car has always run rough and it had a miss or "hiccup" at around 2800 under moderate load when accelerating. It was almost like the EDIS unit was resetting. I tried re gap-ping the plugs back to the .035 and still it was not happy.

Anyway. I had a set of plugs from my 94 mustang (an V6 EDIS based car) I matched them up and they turned out to be the corect reach and thread pitch so I installed them with a gap of .035 (stock for the car is .028) The car runs much better. IT is as if I took about 2 deg of timing out of it across the board.

So why is this? Resistance? are the plugs for EDIS cars have less resistance because they have better coils where as the older plugs have a higher resistance so the charge can build up a tad before discharging?

Anyway new ford mustang plugs and the car is spot on!!!!

This make me think that if you convert to EDIS you really should use plugs and wires (I also use mustang wires for my car) as they are all made to work together with the EDIS system.



Anyone got any ideas? re this?

[Dean924s]

So am I now driving a Pord? or a Forsche? LOL.

[NITROPIXIE]

When converting from a traditional distributor ignition to an EDIS one, resistive plugs are now required otherwise, as you have had, you can get interference.

With NGK plugs, say you are using a BP5ES on a distributor, then you would use a BPR5ES with EDIS. The R stands for resistive and is what you require with EDIS setups.

Hope this helps

[Dean924s]

2011 is rapidly approaching and again all is working fine with my car. I still drive it every day and the MJLJr has been rock solid. Proof that this is a great... No Excelent product!!!

[NITROPIXIE]

Is there a post of yours in the powered by section???

[Dean924s]

Is there a post of yours in the powered by section???

No. It would be nice to move this to the powered by thread and re title. This thread has all the details of my adventure. I was actually looking around and it would be nice if I could merge this with the maps thread and the sensor thread into a single thread in the powered by thread. Although there is alot of info in this thread that would help others that is not specific to my car.

[brentp]

Done

[Dean924s]

Done

TKS!!!

[Dean924s]

THREE years and still going strong!!!! This is my DD so I am betting close to 60K miles with no issues (the Odometer stopped working about a year back)

Proof positive that Brent has a great product!!!!

[Dean924s]

dean, dont forget about a cover for that trigger wheel. it is in a very exposed position and would do very bad things to a stray finger.

alexander.

Note to self I still need to do this.

[brentp]

Hi Dean,

Glad things are still running well for you!

[Dean924s]

Things are running great!!!! I drive it every day. I probably have 50-60K miles on the MJLJr

Just a note to those that may read this thread I updated the map to take care of some minor driveability issues as well as a timing belt replacement.

Great product Brent!!!

[Dean924s]

I can not believe it but another year using MJLJr as my dd and not a single hiccup / problem with it. Being it is a Porsche there have been other issues. Like a trans, a dif a FPR rear hub bearings front bearings A arm bushings gas tank rusting.. . . . .And the list goes on. But again my hat is off to Brent it is a great product that I use virtually every day!!!!!.

[brentp]

Thanks for the update, Dean! Glad to see the Porsche is still running strong. I really appreciate the research you did around your specific project, too! I have a project that needs the compact form-factor of the RX7 sensor...