Trip to the dyno

After about 1000km's of running in the engine, I took a trip to the dyno to get a reading. To refresh your memory, this is a s5 tii motor. The turbo has been removed. The motor was completely rebuilt and street ported for good measure. It has been fitted with a complete RB street system, as well as a weber 48 IDA.

On the first run we got a reading of 157hp(117kw) at the wheels. Not shooting the lights out but quite a respectable number.

I then consulted my engine builder and members on the rx7 forum. It was agreed that we would increase the size of the choke tubes and rejet the IDA for slightly less fuel and slightly more air.

The following weekend I was back at the dyno and the changes we had made resulted in an increase of 11hp (7%) to 168hp (125kw) at the wheels.

Here is a chart comparing the two runs :