i have a series 4 rx7 it goes hard. i also got a s5 engine to slap in it however to make the
new engine work i need a s5 loom and ecu does any one no where i can get one?

 

The for sale section on this thread, though putting an S5 engine in a S4 is not that straight forward.

 

You can just use the keg.Then use the rest of the s4 Stuff on the engine,and wire the engine up as an s4...Oh,you need to Swap the front Cover.Or run Premix,as the S5 has an Electric Omp and the s4 is mechanical.

 

keg? omp? not sure on those 1s.

 

i need some too

 

keg is the bare block, omp is the oil metering pump. S4 used a mechanical pump and S5 used an electric pump. The OMP puts a small amount of oil in the combustion chamber to complete the seal and lubricate the engine. You can premix (put oil in the gas tank) and remove the OMP, this carries its own pros and cons.