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Old 09-30-2008, 01:07 PM   #1
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Default Hydra 2.5 COP settings

Currently running GT2560 and Hydra 2.5 on 2001

I have a set of COP sitting on my desk for a long time. Will be any benefits converting my 2001 onto Toyota COP considering the 01+ have already COP on 2 cyl. ??? I have seen that Y8s had done this using the Hdra 2.1. Love to know any feedback on how good the change was.

Thanks
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Old 09-30-2008, 01:39 PM   #2
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I have no data to prove it does anything.

Anecdotally though, it feels smoother and seems to run better at larger spark gaps.
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Old 09-30-2008, 01:47 PM   #3
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Did you need to modify the Hydra harness in order to get it to work... love to know more about the installation if you don't mind... I think I will take the plunge and do it.

The idea of increasing the gap on the plugs might enable more timming ?
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Old 09-30-2008, 03:21 PM   #4
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It wont enable more timing. it may enable slightly less fuel usage, but that's a complex conversation not meant for this thread.

to set it up you need:

* two more pins and wire for the hydra harness (From Jeremy @ FM)
* the correct pinout location (from Jeremy @ FM)
* to run those wires along with the two already installed to the engine bay
* harnesses for the COP units.
* to wire hydra output 1 to cyl 1, hydra 2 to cyl 3, hydra 3 to cyl 4, hydra 4 to cyl 2.
* to disable the "wasted spark" setting in the ignition setup menu
* to update the spark dwell settings to match those that Jason Cuadra determined
* to hack away at the COP housings so they fit the 01 valve cover. or hack the VC.
* some way to mount the COPs securely.

I can tell you the fitting/mounting is not a simple task and they likely dont even fit in the valve cover holes. test this before you start by pulling off at least two adjacent spark plug boots and sticking the cop in the hole. You might find it's not worth the trouble to pull the valve cover and bore out the holes more.
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Old 09-30-2008, 04:05 PM   #5
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Quote:
Originally Posted by y8s View Post
It wont enable more timing. it may enable slightly less fuel usage, but that's a complex conversation not meant for this thread.

to set it up you need:

* two more pins and wire for the hydra harness (From Jeremy @ FM)
* the correct pinout location (from Jeremy @ FM)
* to run those wires along with the two already installed to the engine bay
* harnesses for the COP units.
* to wire hydra output 1 to cyl 1, hydra 2 to cyl 3, hydra 3 to cyl 4, hydra 4 to cyl 2.
* to disable the "wasted spark" setting in the ignition setup menu
* to update the spark dwell settings to match those that Jason Cuadra determined
* to hack away at the COP housings so they fit the 01 valve cover. or hack the VC.
* some way to mount the COPs securely.

I can tell you the fitting/mounting is not a simple task and they likely dont even fit in the valve cover holes. test this before you start by pulling off at least two adjacent spark plug boots and sticking the cop in the hole. You might find it's not worth the trouble to pull the valve cover and bore out the holes more.

Thanks that was FAST answer !!!

I have a couple 2001 heads assembly with the valve cover sitting around my garage.. I will use one to test fit the COP in order to get good fit.

One more thing : Harness for the COP ? are you using the existing wires and just tap the end of them with the proper size electrical tap that would stay tight on the COP connectors ?
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Old 09-30-2008, 05:33 PM   #6
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Those dwell settings assume a 2 x 4,700 uF caps near the COPs.
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Old 09-30-2008, 05:41 PM   #7
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Good info here. Hydra is supposed to be Dwell settings friendly. Assuming that, there is no need for add-on circuity right ?
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Old 09-30-2008, 05:56 PM   #8
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you can get the pins somewhere (search this forum) and the connectors from a toyota dealership (also search for "connector" and my username). Or you can do a hack job if you want. lots of people have.

Jason: you didn't mention the capacitor back when you measured the dwell in that original thread

Just to clarify, it's two caps across the main power supply to the coils right? in parallel (9400 uF)?
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Old 09-30-2008, 06:43 PM   #9
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Yep and mount em say back of the head or behind the intake mani where it's a bit cooeler. Use 105C caps.
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Old 10-01-2008, 01:50 PM   #10
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Ok got my hands on a Lotus elise harness last night so I am close to go....

Found out that my COP part # 90919-02238 are 1.6 inch longer that the original OE COP ???? Looks like they might be longer than other ones I have seen here ???

see pics :








Last edited by Jean; 10-01-2008 at 02:31 PM.
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