90Q ABY Conversion - Help please

[simyboye]

Hi there,
Working on my 90Q and have a few questions regarding the conversion. Tonks, where are you when I need you?

1.Earth from coils - where should it go? The cable is about 100mm to short to reach anywhere, do I extend it?

2.Brake vacum/ servo - how do I get round that? My 90Q is vacum but the ABY is hydraulic? Can I tap into the IM?

3.Boost controller N75/ loom cable? - Wheres that little ******? Is it on the original ABY loom?

4.Earth from bottom of engine? Where does it fit? Not long enough.

5.90Q main wiring/ S2 ABY main wiring? Had a sniff round S2central and need some more wiring drawings, does anyone have any?

Many thanks
James

[PeteUr]

1.Earth from coils - where should it go? The cable is about 100mm to short to reach anywhere, do I extend it?

if its an original connection there must be a place for it rather than extending it, have you looked on etka, it might show on there.

2.Brake vacum/ servo - how do I get round that? My 90Q is vacum but the ABY is hydraulic? Can I tap into the IM?

Not 100% sure about this, i'd probably do a setup same as the s2's but remove the bomb out the equation which would just mean getting a s2 avant brake master cylinder.

3.Boost controller N75/ loom cable? - Wheres that little ******? Is it on the original ABY loom?

Yes it will be on the loom

4.Earth from bottom of engine? Where does it fit? Not long enough.

How big is the earth cable? is it a gearbox earth, or different one?

5.90Q main wiring/ S2 ABY main wiring? Had a sniff round S2central and need some more wiring drawings, does anyone have any?

What bits you wanting to know, btw congrats on getting it started.

[re2500]

I have ABY converted CQ and i use the vacuum assist (more reliable IMO)
Just tap into the IM. I also fitted an inline one way valve so air can only travel from the servo into the IM, not back. I have been told this is not 100% required as you would only brake normally off boost. But i think it is good to have.

[Tonks4x4]

Give me a call if you want.