What Bosch sparks are recommended for a felly 1.3 carburatter engine? It is a 136M (high compression) engine block that used to be on a 2000 1.3MPI felicia and now on my felly using the induction manifold and carburatter and distributor from my previous engine 135B (low compression)?

I bought a set of Skoda Favorit Bosch Super 4 FR78 Spark Plug Set from Jorily.

Will be sticking these in at service time

I would get the correct ones for the mpi engine and set them to the gaps for a carb model usually smaller gaps than an injection model. As you've mixed and matched you will have to start somewhere and see how it runs:thumbup:

Are you running the original injection camshaft because these usually they have a softer profile than a carb model so you may be down on overall power as well.

You'll need to get max lift and duration for both inlet and ex. valves and then compare carb and injection profiles then you may need to alter the jetting on the carb for max economy/performance a session on the rolling road should sort it out and get best ign curve as well good luck with the mod.

Why Bosch?

Use these, no need to bother with the gap

Skoda Felicia 1.3 Mpi/Fabia 1.4 Spark Plug Set-NEW on eBay, also, Skoda, Car Parts, Cars, Parts Vehicles (end time 23-Jan-09 10:40:12 GMT)