Originally posted by SteveH
differens on the heads?
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I can second that, my 91 (cast) has all them too..
Manifold isn’t the original, just to avoid confusion..Attached Files91CQ20v - Gone to a new home
93UR-S4 - The Magic Carpet
94S2Bus - The Emerald ExpressComment
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@doug didnt we talk about this late friday night
you dont need the water manifold on a 7a turbo if you keep it under 300bhp and where do i get those larger headgaskets from
94 s2 avant
aoc member 1116
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Not all 7A engines have the sodium valves. Only the earlier ones. Late ones are std.
Sodium is the way to go in turbo cars IMHO. On extreme applications they might be not the way as the sodium channel makes the valve weaker...
My friend replaced his AAN head with 7A head. He drilled few holes for the turbo water manifold and made a bracket for the hall sender. That's all. His version had the "extra" EM stud holes.-Comment
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It was someone else that said you don't need the better water manifold for under 300bhp (I think). Larger headgaskets? As in thicker ones? or ones for the larger bores? I would just use a metal laminated one - and if you want it thicker you buy 2 and make a hybrid.S2,RS2,S4 WB,RS4,S4 B8,RS6 C5,RS6 C6,R8Comment
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im sure id heard about thicker copper ones about may have been javad to much info to take in94 s2 avant
aoc member 1116
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any pics dougOriginally posted by BRYShow us the other side where it needs machining.94 s2 avant
aoc member 1116
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You missed off a pleaseOriginally posted by BRYShow us the other side where it needs machining.
I'll take a pic of the 7A tomorrow but here is the ABY with manifold on. The 7A has the triangular shapped hole already. You need to drill a further 3 holes for the manifold and another 3 and get them tapped.
If you are using them in anything but a 3B you will need the cam hall sender mounts added as well.Attached FilesS2,RS2,S4 WB,RS4,S4 B8,RS6 C5,RS6 C6,R8Comment
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Escort RS turbo's have sodium filled exhaust valves too, along with a couple of others in the ford range.Originally posted by porkkisSodium is the way to go in turbo cars IMHO.
Looks like the 7A head could be a cheaper alternative to the S2 head then with a bit of work
Cheers,
ChrisCheers,
Chris
Silver S2 Avant : Sold
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