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Ditching HT leads and dizzy for COP always a good idea?

 
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Odin_S




Joined: 19 Jul 2006
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1994 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Thu Aug 24, 2017 10:43 am    Post subject: Ditching HT leads and dizzy for COP always a good idea? Reply with quote Reply with quote including images

I'm in two minds about doing this, I've been told that 1zz/2zz conversion will give me a bigger spark and more power. My goal is just over 400bhp fly.

However i see George's MR2 is still running OEM and is at 700+ and other big power 2s.

I guess I'm looking for the pros and cons, help me out [Very Happy]
I've bought a 1zz loom, just to find the 4 coil packs now. What else do i need?
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Gazza_DJ
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1997 Toyota MR2 Mk2 NA Rev4

PostPosted: Thu Aug 24, 2017 11:19 am    Post subject: Reply with quote Reply with quote including images

Assume you have an aftermarket ECU? You'll need some way of taking a cam timing trigger if you want to remove the distributor completely, have a look at this Racer X kit as an example - http://racerxfabrication.com/mr2-celica/ignition/1zz-coil-on-plug
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Odin_S




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1994 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Thu Aug 24, 2017 2:07 pm    Post subject: Reply with quote Reply with quote including images

Very nice Gaz, i may look into this for the future. I have a Link G4

But just want to see who's done the conversion
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rev2rich
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1991 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Thu Aug 24, 2017 3:02 pm    Post subject: Reply with quote Reply with quote including images

I have done the conversion and the kit is basic had to re machine a few parts so they would work better but overall it was great and smiple
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JAAASH
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1996 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Fri Aug 25, 2017 1:22 am    Post subject: Reply with quote Reply with quote including images

In for the replies as im also interested in this.
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androo007
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1994 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Fri Aug 25, 2017 6:45 am    Post subject: Reply with quote Reply with quote including images

Yep. I have cops and 8 grade iridiums. Spark millions stronger and helped hugely after 350-400hp.
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sky-net
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1990 Toyota MR2 Mk2 Turbo Rev1

PostPosted: Fri Aug 25, 2017 7:55 am    Post subject: Reply with quote Reply with quote including images

Aaron from ATS Racing stated in their website that our stock electric system is pretty strong and capable:

http://atsracing.net/Blog/View/23

A good COP system should be an advantage as it has a more recent design... But more pricey as well.
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Al-sw20




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1991 Toyota MR2 Mk2 Turbo Rev1

PostPosted: Fri Aug 25, 2017 8:46 am    Post subject: Reply with quote Reply with quote including images

COP can have tuning advantages with an aftermarket ecu.

You don't chase horsepower by upgrading ignition. All you need is a reliable spark. It's money that can be better spent elsewhere in the car.
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mr2magic




Joined: 09 Apr 2010
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1991 Toyota MR2 Mk2 Turbo Rev1

PostPosted: Fri Aug 25, 2017 10:39 am    Post subject: Reply with quote Reply with quote including images

Al-sw20 wrote:
COP can have tuning advantages with an aftermarket ecu.

You don't chase horsepower by upgrading ignition. All you need is a reliable spark. It's money that can be better spent elsewhere in the car.


This! Things like a bigger or stronger spark are marketing gibberish. It makes no difference how hot or cold, large or small the spark is; if it's there at the right time it will ignite the mixture.

It is maybe important to note that COP do burn out and when they do they are expensive!
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Gazza_DJ
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1997 Toyota MR2 Mk2 NA Rev4

PostPosted: Fri Aug 25, 2017 10:56 am    Post subject: Reply with quote Reply with quote including images

mr2magic wrote:
It makes no difference how hot or cold, large or small the spark is; if it's there at the right time it will ignite the mixture.


Well that's just not true. Selecting the wrong temperature spark plug will result in the plug overheating or excessive carbon buildup in a short period of time. . Overheating can be particularly dangerous as it can cause pre-ignition.
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mr2magic




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1991 Toyota MR2 Mk2 Turbo Rev1

PostPosted: Fri Aug 25, 2017 11:00 am    Post subject: Reply with quote Reply with quote including images

Gazza, don't mix up the temperature of the plug, which is a function of its design with regards to heat dissapation via the contact between plug and cylinder head and the quality of the spark itself.

Simlpy put...even if the spark is totaly weak and only just managed to be produced by the coil, if it is sustained within the combustion chamber at the right time it will ignite the mixture - it doesn't matter if it ist 35kV or 35MV
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Marty J




Joined: 26 Oct 2006
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PostPosted: Fri Aug 25, 2017 11:29 am    Post subject: Reply with quote Reply with quote including images

It's the cop from the 1zzfe that you need. I seem to recall that the 2zzfe uses a different setup.

If you want to keep a clean oem look, then you can fit a 5sfe oil pump which has the space for the trigger wheel sensor.

Also the trigger wheel pulley is 13521-88560.
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Marty J




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PostPosted: Fri Aug 25, 2017 11:32 am    Post subject: Reply with quote Reply with quote including images

Although it's a little bit long, I would recommend that you read this thread to get a better understanding of what's involved.

http://www.mr2oc.com/12-after-market-engine-management/406170-60-2-crank-trigger-so-worth.html
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pbmr2
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PostPosted: Fri Aug 25, 2017 12:37 pm    Post subject: Reply with quote Reply with quote including images

The gen4 pump also has the sensor and the lower crank gear has teeth.
Stock setup on the gen4 also uses a cam sensor but it isn't really needed in a standalone setup.

Just options for using stock toyota parts for the trigger wheel and sensor.

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Odin_S




Joined: 19 Jul 2006
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1994 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Fri Aug 25, 2017 4:09 pm    Post subject: Reply with quote Reply with quote including images

Very interesting this guys, thanks. Going to take time and read once I'm home [thumleft]
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JAAASH
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1996 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Fri Aug 25, 2017 5:08 pm    Post subject: Reply with quote Reply with quote including images

Al-sw20 wrote:
COP can have tuning advantages with an aftermarket ecu

My mapper mentioned this to me last time I was there. Something about being able to time the spark better iirc.
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Al-sw20




Joined: 23 Jan 2005
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1991 Toyota MR2 Mk2 Turbo Rev1

PostPosted: Fri Aug 25, 2017 8:04 pm    Post subject: Reply with quote Reply with quote including images

Yep the spark either ignites at the right time or it doesn't.

You can't be a little bit pregnant.
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JAAASH
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1996 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Fri Aug 25, 2017 10:00 pm    Post subject: Reply with quote Reply with quote including images

Al-sw20 wrote:
You can't be a little bit pregnant.

Ye, thanks for that... [Rolling Eyes]
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Madabout
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PostPosted: Sat Aug 26, 2017 6:33 am    Post subject: Reply with quote Reply with quote including images

Al-sw20 wrote:
COP can have tuning advantages with an aftermarket ecu.

You don't chase horsepower by upgrading ignition. All you need is a reliable spark. It's money that can be better spent elsewhere in the car.


I am no expert but this is exactly why people do it on the mx5 community I am mainly involved in.
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androo007
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1994 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Mon Aug 28, 2017 7:07 pm    Post subject: Reply with quote Reply with quote including images

Spark blowout is a factor too.
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