Interesting to see that RacerXFabrication link posted by ST185Pinjo on the Inlet Plenum thread. They offer a coil on plug conversion kit based on the COP from the Toyota 1ZZ-FE engine.





The one thing that's not entirely clear to me is whether this is designed to allow the 1ZZ ignition system to fit on a 3S-GTE? The web site lists an MR2/Celica with a choice of Gen 2 or 3. I know the US got the Alltrac with the Gen 2 engine but I didn't think they got the Gen 3?

One of the problems fitting COP on a Gen 3 3S-GTE is there are no way of securing them to the cam cover. The Gen 4 3S-GTE Caldina ST215 cam cover has provision for this but I believe there are other problems fitting this cam cover to a Gen 3 3S-GTE?

The web site shows a 1ZZ COP 'valve cover adapter plate' which I am wondering is a solution to this problem, although there are only 3 holes



Toyota Corolla 1ZZ-FE Engine

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

Would sir like me to bring the OEM ST215 crank sprocket to the curry meet next week?( assuming I can find it)

I can't see much point in an adapter plate when Carribean Bob is waiting in the wings

It would be good if you could bring your OEM ST215 crank sprocket, COP and other associated bits up on Friday for comparison. Jon has made up a slightly modified copy of the crank trigger kit that JP lent me. I picked this up from Jon recently and was planning on returning it to JP at the curry meet.


True, should be easy enough to make something up to do the job. Would still like to get my mitts on an ST215 Caldina cam cover though so I can see what mods are required to get it to fit

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

Thanks to Steve lending me the ST215 Caldina cam cover I was able to compare against the ST205 using the ST215 Coil on Plugs.

It was tricky to confirm if the COP was seating properly on the spark plug. I am used to the plug leads 'hard docking' with the top of the plugs but with these its more like a 'soft dock'. I tried removing the rubber seal from the top of COP but that made little difference. The rubber 'socket' on the end of the COP has a spring so the design doesn't really lend itself to a feeling of positively engaging with the top of the plug.

The upshot of this was the finding that it is absolutely essential to screw the COP onto the cam cover using the offset mounting bracket at the top of the COP. I tried to remove the dizzy drive so I could fit the Caldina cam cover but despite using the correct tool the star socket screws rounded (grrrr...) so I was forced to abandon that idea. In the end I simply inserted the COP into each of the cam covers and compared the exposed length below the gasket level. It was identical which means I can use the ST205 cam cover with an adaptor plate to allow the COPS to be screwed down.

People may ask why I had to do this as all the info is available on the interweb but I wanted to be sure. There's so much misinformation out there you can't be too careful!

ST215 Caldina Coil on Plug Part No: 90919-02227. The 1ZZ-FE COP's are the same dimensions are Part No. 90919-02239




The five connectors indicate that the coil has a built in igniter however you have to have an ECU that can drive the COP's directly. Most of the bigger names like Autronic, MoTeC etc. have this facility. The Apexi PFC can't tho.




The 1ZZ-FE Denso COP's seem to be a popular upgrade choice. They are reputed to be able to handle power outputs up to 700bhp.



There is some useful information on the MoTeC forum here: http://www.motec.com.au/forum/viewtopic.php?f=19&t=374
Includes useful info such as the dwell/voltage settings to use on the ECU and part nos. for the connectors.

It's good there is so much info available so it looks pretty straightforward to do the conversion.

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

Don,
Did I lend you my 1ZZ COPs? I think that is what they are from - I will check part numbers when I get home if they are any use to you for mock-up purposes?

_________________
JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

Some useful research, thanks Don.

Just to add some further research on the electrical side (so I can ensure ECU compatibility) of the 1zz

http://www.msextra.com/forums/viewtopic ... 94&t=30253



Coil Pin Out
1.ground
2.trigger
3.tach
4.+12V

Not found any 'reliable' spec on driving them, but looking round the megasquirt forum it would appear to be a 5V pulse the same as the standard 3s igniter takes (drive high to charge coil, take low to fire spark)


Another bit of googling would suggest that the ST215 COP is the same.

_________________
If at first you don't suck seed, try drier grain.

A bit more ggogling.

ST215 coils:

http://www.mrm-racing.se/forum/showthread.php?t=1652

Take trigger line high for dwell time, spark on negative edge. Dwell times as follows:

8V 6.3 ms
9V 5.3 ms
10V 4.4 ms
11V 3.8 ms
12V 3.2 ms
13V 2.7 ms
14V 2.4 ms
15V 2.2 ms


Re. 1zz-FE (and others)

http://www.motec.com.au/forum/viewtopic.php?f=19&t=374



http://www.ae86drivingclub.com.au/forum ... -7098.html

_________________
If at first you don't suck seed, try drier grain.

If you have a set of 1ZZ-FE Denso COP's P/N: 90919-02239 I could borrow for confirmation that would be great JP

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

my four running with 1MZ COPs (90919-02214)



Edit: but i'm not sure that stock intercooler will fit on these coils...