Audi / VW 1.8T (Standard Valve)

As fitted to our 550 BHP Audi A4 which we raced in the Dutch Supercar Challenge

We're not sure how many cars the 1.8T engine has been fitted to.... but its a lot. Audi A3, A4, TT, VW Passat, Golf, Jetta are but a few.

Its 5 valve format means more work for the gas flow tuner but the results are excellent. We have produced 2 versions. A standard valve and a big valve version. The Standard valve is good for 500bhp whilst the big valve version (fitted with inconel valves will produce 700 BHP).

This head will realease the full potential of this excellent engine allowing any other modifications made to be used to their full potential. We found the majority of improvements were made on the exhaust side of the head. This improves turbo efficincy, boosting power, improving response (reduced turbo lag) and will allow a larger turbo to be used without lag.

Cost for the standard head is £1250.00 + vat on an exchange basis. (£600 exchange). A 'taping' service is also available for this head at an additional cost of £100 which will give the final hand finish to the ports and provide a further 1% flow.

Note : flow diagrams show flow against specific valve openings at 0.050 inch valve openings at 10" pressure. Therefore actual flow volume increase is measured as the area under the graph (indicated in yellow for inlet and blue for exhaust). Standard valve sizes are used on our heads unless specified as a big valve version. Tests shown here are carried out on a flow bench on a bare head without filters. Therefore the difference between a standard engine with standard inlet ducting and filters will be larger than shown here.

See below for the full reports as generated by our gas flow bench and Port Flow Analyzer software. Click on the images for full size image: