scirocco storm conversion

["Ewan Hopkins" <ewanhopkins@hotmail.com>]

I have an í85 UK Storm model, originally 1.8 k-jet.
It has recently been upgraded with a ~50,000 ml. 2.0 unit sourced from a  
í92 Audi 80 2.0E.

The donor car had an electronic Digifant fuelling but I retained my 
k-jet set-up.  I kept the audi inlet manifold because of the differences 
in the injector seats, compared with the old 1.8 unit, but put a 
4-branch & performance exhaust on and the obligatory K&N filter at the 
other end.  Also swiss-cheesed  the air-box  to improve air-flow.

Initial verdict was: marked improvement in low-mid torque but poor at 
the top-end ñ it wouldnít go beyond 5200rpm in top and pinked a lot 
beyond 4500 once warmed-up.

Tried upgrading throttle body & warm-up regulator with ones from audi 
2.2 5-cyl: not much difference.

Tried disconnecting vaccuum advance from distributor & plugging hose, to 
see if it was over-advancing: This killed the acceleration, as expected, 
but made no difference to the pinking/lack of top-end.

To my mind, this leaves four possible culprits, (assuming that it is not 
an ingition problem):
Fuel pump, accumulator, injectors or fuel meter. 

I donít think it is the injectors as there were no problems before and 
the spray pattern looks OK. Not having easy access to a fuel system 
pressure tester, it is difficult for me to rule out any of the others.  

Any way of accurately testing the performance of the pump without a 
gauge?

Anyone else done this or a similar conversion and had similar problems?  

Any other ideas?



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