parts from S2 to 7A

[Nuno Cristiano]

With the head machined to work with the water manifold 3B can reduce hot spots. An example is the S2 and RS2 and others using this system. I did this and I upgraded in my head 7A.

[Tom_]

i dont know anyone,who did this in our country.This is the biggest problem with water manifold.I have no problem with send the head to someone,but i am scary that te head will be delivered and the shipment wasn´t be more expensive than the head improve (water manifold)
If i have a water manifold,than i use a 3B IM,but if i dont have i must think whats next.

[Mcstiff]

With the head machined to work with the water manifold 3B can reduce hot spots. An example is the S2 and RS2 and others using this system. I did this and I upgraded in my head 7A.

I understand the theory but I question the practice when you have people tripling or quadrupling S2 power with no problems.

My last 7at made 180whp (~25% better than stock), and currently I know of a few over 200whp, with the 7a water manifold (and no intercooler!). If I had hotspots they were not an issue. I don't think "hotspots" will be an issue unless you are really going for a ton of power.

Another option could be drilling and tapping additional ports and replacing the whole upper hose.

[Nuno Cristiano]

I understand the theory but I question the practice when you have people tripling or quadrupling S2 power with no problems.

My last 7at made 180whp (~25% better than stock), and currently I know of a few over 200whp, with the 7a water manifold (and no intercooler!). If I had hotspots they were not an issue. I don't think "hotspots" will be an issue unless you are really going for a ton of power.

Another option could be drilling and tapping additional ports and replacing the whole upper hose.

You measured Intake Air Temp.?

[Tom_]

so only reason to do a water manifold is to better cooling the head right?

[Nuno Cristiano]

Head of my Quattro.

[Tom_]

where did you do that?In your country,or u send it to the 034M. Do you know,if its same a subframes V6 quattro coupe vs 20V quattro coupe?

[Error404]

The subframe is different Tom. Any any 5 cylinder subframe will be fine, except ABY

[Nuno Cristiano]

where did you do that?In your country,or u send it to the 034M. Do you know,if its same a subframes V6 quattro coupe vs 20V quattro coupe?

Here in Portugal.

[Tom_]

Error404 : thanks mate and btw why not ABY?

[Mcstiff]

You measured Intake Air Temp.?

I have logs with IAT but I believe that the value to look at would be EGT. My last configuration was non-intercooled so IAT rose rapidly but over ~50,000 miles was never an issue.

Error404 : thanks mate and btw why not ABY?

I think all the 6 speed cars have different subframes.