Saw the light -> My 1986 AE86 project

[Ivan141]

I've never heard any talk of open airfilters/exhausts being dangerous for the engine. There are plenty of oilcooler setups available that would need a diffeent sandwichplate on the engine block. The stock system is a pressure-bypass, which is not very good since oil pressure drops when the oil gets hotter, you can imagine this is less then ideal. If you're going to use the engine intesively and want all the cooling you can, might as well accept a possible drop in pressure, otherwise juse a thermostatic bypass to minimise the drawbacks. No idea about the A/F ratio's.. a wideband would be a nice touch if you're replacing the lambda sensor since the MAP sensored version doesnt need a regular lambda anyway (unless it has a catalysator).