Evening chaps, as per title. 'How do you work out the optimum size of an Intercooler?'. I'm going to have to have this built and in place before I try and have the whole set up 'set up' if you know what I mean. The design in my head has an Intercooler on the left half, an oilcooler on the right in front of the motor. Same rough area as a rad on a water boiler. Not going to be 'half and half' if needs be. Measured up and I can get the surface area of the standard oil cooler easily in much less than half the space with loads to spare.

There is no optimum size from a power point of view, only the biggest one you can physically fit in the available space, which is why you see scoobys etc with huge full width FMIC's hanging out the front spoiler or grilles.
If your making one from scratch think about building it to flow the air properly, a really crap too-small intercooler can offer a restriction and actually loose you power.
So rules are, as big as you can make it, with as big orifices as you can fit in, with the least amount of turns etc and the most amount of tubes in the core...
Also not all intercoolers are created equal, I seen a flow test once of various manufacturers oem ones and some of them were very bad, and others quite good.
For the oil cooler, do you really need it that big on a quarter miler? cant you just run a deeper sump and do away with it etc? I know lorcan and some of the others take off the oilcooler for their turbo useage. If so then youve suddenly got a lot more space for your intercooler

Hi Tom, how you doing? I sign of CAC machines for my company all be it diesels. We have to meet two parameters with regards to the CAC. restriction and temperatures, important one is the air into intake. If we have a restriction higher than 10kPa it's a failure and intake temp can't be above 50degC. I guess these figures are irrelevant for your bike but the principles the same. keep restriction low and intake temp low . bugger just re read your not and noticed your referring to a inter-cooler, Doh scrub the above haha