Astor XS XU7J4RS (For Sale £1000)

[C.A.R.]

Regardless of what it is that "doesn't work" the evidence shows that on various applications this manifold isn't compatible with the standard management system on the 1.8 engine.

I've seen people use XSI injectors (think these are yellow?) on a 1.8 to try and get it to fuel a bit more, but all this did was overfuel the engine with no 'measurable' performance benefit.

There is no doubt that throttle response is improved and it really livens the 1.8 up, but that's probably due to the enlarged TB rather than anything else (greater density of air at lower throttle position) it would be interesting to compare a 'regular' manifold swap with what Dan86 has done with the XU7 TB.

On the two XU7s I owned with this conversion there was a marked improvement in overall performance when I returned to 'stock' inlet manifold.

I really would like to see a successful installation of both manifolds with a rolling road print-out showing the increased power, however I feel that it really will require aftermarket management before any significant gains are seen.