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Old 28-11-2007, 10:45 PM   #1
imported_monsterer
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Default Can you convert a c20xe designed for dizzy to dis coil pack?

Hi guys,

Just wondering if this is possible - my engine came from a F reg astra gte, i'm guessing thats a dizzy engine?

Cheers, Paul.
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Old 29-11-2007, 11:20 AM   #2
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Did some research on migweb, looks like i'm going to need the exhaust cam from a dis c20xe... along with the blanking plate
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Old 29-11-2007, 12:08 PM   #3
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yes u will need the cam along with the blanking plate (or make one) and obviously the dis pack. i presume this is for your ITB conversion?

Matt
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Old 29-11-2007, 12:26 PM   #4
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Indeed it is - starting to get a bit more complex, didn't want to have to take the engine apart, albeit only a little bit.

I'll need to set the cam timing which is a bit scarey!
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Old 29-11-2007, 12:26 PM   #5
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You wont need to change the cam if you are removing the dizzy you just need the blanking plate or make one.
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Old 29-11-2007, 12:27 PM   #6
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Quote:
Originally Posted by Allan McD
You wont need to change the cam if you are removing the dizzy you just need the blanking plate or make one.
Allan
Apparently, the trigger needs the dis cam because there is a hole in the end of the cam plate thing which the trigger plugs into...
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Old 29-11-2007, 12:53 PM   #7
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I agree with Allan, you shouldn't need to change the early cam to a later one just block off the oilway on the end of the cam (QED\SBD kit comes with a little ball bearing which you glue\hammer into the end or use a grub screw) and add the blanking plate. I've got old cams on my now dispack setup with no problem.

Of course this assumes that the ECU you use for the ignition will use the stock vauxhall crank sensor setup.

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Old 29-11-2007, 01:28 PM   #8
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I'm confused now in that case... The following page on migweb (with pictures) shows the two different cams with a bit in the dis cam for driving the trigger which isn't present in the dizzy cam:

http://www.migweb.co.uk/forums/engin...s-cams-xe.html

How do you get around this?

Cheers, Paul.
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Old 29-11-2007, 01:41 PM   #9
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Quote:
Originally Posted by MikeR33
Of course this assumes that the ECU you use for the ignition will use the stock vauxhall crank sensor setup.

Mike
I'm going to be using the stock vauxhall ECU if that makes a difference?
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Old 29-11-2007, 02:35 PM   #10
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Is there a huge advantage to go to dispac instead of standard distributor?

If you're using a Vauxhall ECU, just make sure you get the earlier one which works with the dizzy.

By the time you've raspberryed about with re-mapping, fabricating an inlet plenum & carrying out a dispac conversion you might as well bite the bullet & get yourself the Megasquirt ECU. (£400 all sorted & Mr McD can give you the name of a reputable chap.)

The idea of going to bike ITB's and keeping the Vaux ECU is to do it on the cheap, the way this is developing you will spend a fortune with very little HP gain (fuel economy will be much better )

It's time to roll the dice ..........

i) Either you want it cheap & simple (ish) with good economy in which case go early Vaux ECU with dizzy.

OR

ii) You want improved performance, in which case go for new Cams & a mappable ECU and be happy to spend £500+.


........ Just my two penneth for what it's worth........
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Old 29-11-2007, 04:57 PM   #11
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I agree with Andy, if given the choice, i'd go megasquirt everytime.

an exhaust cam can be sourced very easily/chaeply. and a fully built MS ecu suitable for your application wouldn't be more than £300*

Bill Shurvington is the chap to speak to about MegaSquirt




*price quoted from ExtraEFI, although i'm sure Bill's price wouldn't be too dissimilar.
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Old 29-11-2007, 05:05 PM   #12
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With M/squirt it wont mater what cam you have you dont use the cam sensor.
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Old 29-11-2007, 05:58 PM   #13
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i just saw of my dizzy, and took out the shaft and then filled the hole with chemical metal…(on my suzuki engine)
trigger weel sits on crank

Marcus
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Old 29-11-2007, 06:34 PM   #14
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Quote:
Originally Posted by Allan McD
With M/squirt it wont mater what cam you have you dont use the cam sensor.
Allan
True! i forgot that! it uses the crank position sensor
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Old 29-11-2007, 07:16 PM   #15
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I apreciate the advice guys and i'm probably just being hard headed (as ususal) but i really want to go for a stock ECU because of all the concessions to cold start, idle control and all the other niceties that you may not get on a 3rd pty ECU.

I may be making more work for myself by wanting the DIS ignition system but i think it will be worth it in the end in terms of tunability and MPG.

I'm keeping track off all the money i spend so you can work out if it will still be the 'cheap' option
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