I no longer run that setup, as I am now back to what is essentially a very 1M coupe-inspired configuration. I ran that setup because I wanted to test having an additional oem sized radiator in front, effectively doubling the thickness of the main radiator. When I went from 7.5HD to 7nonHD my tuner reduced timing due to excessive iats on track. VRSF Intercooler FMIC Upgrade for 2007-11 BMW 135i/335i E82/E90/E92 As we mentioned in an earlier post, the N54 engine runs hot from the factory and benefits from reductions in temperature an Oil Cooler is a necessity and an Intercooler will further help reduce engine temperatures. So based on your claims let's get some data.Bold claims but if true then you have something there. VRSF was part of that test won't comment. I have mounted a ball valve so I can turn the radiator behind the ER on and off and do A-B testing next time I hit the track this month. Best FMIC test I have seen was done by Dave Buschur where Garrett and ETS came on top. As a rule of thumb, an ebay intercooler will liberate about 10 more power than the early slanted turbo TMIC, so on a healthy early classic with a TD05-16g with the usual decat, induction, fuel pump and 440s will see something like 320bhp on a FMIC and 290bhp on a TMIC. BUT I have yet to verify if this is actually beneficial to water temps or not. You will feel the benefit of a FMIC at any power level. The benefit of the ER fmic is that has the same frontal area as the 7.5HD / large wagner but without being stepped, so you can extend the coolant radiator down behind it. My cars FMIC history goes like this: Stock - 7.5HD - 7 nonHD - 7HD "custom" - ER competition w/ water injection and water spray. On the street, any upgraded FMIC is probably OK. I'd just be careful to assume the people who spec'd the factory one had 1.) All the time in the world to design it 2.) All the money in the world to keep revising the design 3.) Had no idea what they're doing.Tentative conclusion: Even if you are only running 400hp-450hp, you still need the largest FMIC you can get if you are ever thinking about hitting the track.
I'd wager that's in turn because none of these companies have stuck a car with their intercooler on it in an environmental chamber to see what happens at the extremes.Ī larger one should definitely improve cooling capacity for heavy track time and having larger metal end tanks might Improve pressure drop across them too which is a plus.
Maybe a larger aftermarket makes this edge case more likely, it probably does since you having more cooling ability and surface area to condense on internally, but like you've said there's no evidence. I've also not seen reports of people removing the blanking plate from their factory cars and suddenly having engine failure so I'd suggest it's so much of an edge case that you tend not to see it in normal driving.
True, there isn't but you don't know the conditions that surrounded seeing the condensation problem on the factory one.
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