Thanks Johan, I definitely agree having a larger expansion tank is ideal. I don’t have the room for a 2L expansion tank up high unless I custom make or modify one. Originally as per Ken’s advice I went with the larger Moroso tank and it can be made to fit, but sort of cramped in that area so bought a smaller tank.(Going to use a 1 Liter for the expansion tank and a 2 Liter for both the recovery and intercooler tanks. I ordered black anodized, but they also come in natural aluminum and red anodized.)
Joel, I would use the 2 liter for expansion and the 1 liter for recovery. I have a 2,7 liter expansion tank (with approx 1liter in it cold) and a less than 1 liter for recovery, works great.
Water expands little more than 8% from 10˚C to 120˚C. I can’t remember exactly but I think my system is 13-15 liter total so the expansion will be slightly more than 1 liter.
Only time I have any coolant in the recovery tank is after complete drain and refill.
I guess my question is, assuming when the coolant overflows into the recovery tank and is drawn back in to the expansion tank does it really matter which tank is first? If 100% of the coolant overflow is not returned then I can see a problem.