Do you have a guide on catalytic converters, types, etc ? I want to find one for a small diesel car but there are only the ones for trucks lolAn intercooler warms up as it works, the larger it is means it can stay cooler for longer. Add in the extra distance the air has to go, the additional turbulance and you have a need to match intercooler size with requirements for it to stay cool for longer.
Rule of thumb I use is 3 litres of intercooler capacity per 100bhp.
Water or methanol injected on the intercooler can also help to keep it cool and I've seen this done where space was limited for a larger intercooler.
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3l per 100bhp does make sense when you think about it, the only thing that doesnt is the placing of some stock intercoolers, like, almost on top of the engine. One can only imagine how fast it heats up when idling like that.I’ve no idea on specifics but the standard turbo will have to fill a larger area which may reduce the effects of the boost that reaches the throttle body?..some may argue it could increase turbo lag where some may say you’ll see around a 5-10% increase in power?..I personally wouldn’t upgrade the intercooler without also upgrading the turbo..but I’m no master on the subject...my car made 40BHP more over stock with the remap alone ..the turbo and intercooler upgrade then took that to just over 100BHP above stock..