After dumping $280 worth of Evans into my new radiator I started thinking I'd be smart to get a catch can to keep the liquid gold from hitting the pavement. What type catch can do you use and what capacity is right for a 3 row 26" core radiator on an RB engine?

$280 worth??!! Dang, how big is your radiator? I use one of these. https://www.summitracing.com/parts/sum-g1472/overview/

26" 3-Core aluminum Champion. Trust me. with an empty block, heater core, hoses and radiator and an RB block, it will take 6 gallons ish. At the local speed shop this stuff is $42 a gal.

I use the one forphorty uses on my race cars, they do their job.

would considering using a factory style overflow jug that returns any overflow back to the system during cooldown be a possibility ? if so, you would need a late style, double gasket cap, and a tank or can that has the overflow tube positioned near the bottom of the can so when the liquid cools, it is drawn back into the radiator via suction.

i asked this a few years back so this might help. i have of course done nothing with the info except save it

https://board.moparts.org/ubbthreads/ubbthreads.php/ubb/showflat/Number/8263857/site_id/1#import

Take into account the expansion for 6 gal at 200*F and that would be the size of the tank.imo

I have no idea what the expansion rate of Evans coolant is but the idea has merit.

A recent technical enquiry to Evans resulted in the following replies:


Q1. What is the coefficient of thermal expansion over range -20degC to +120degC,

A1. The co-efficient of expansion of water based 50/50 standard automotive antifreeze is approximately 5% by volume, Evans Waterless Engine Coolant is approximately 6% by volume.

Q2. Is this expansion consistent across that temperature range?;

A2. Yes, this expansion rate is consistent across these temperature ranges and again similar to that of 50/50. The 6% by volume figure is based on the high end of the temperatures that you have stated above.

I just ordered the Hyundai 1, $15 shipped, I'll post how it works out.
I'll have to figure out a way to mount it.

and i broke down and ordered the Dorman one that i can mount behind the fender. 20 from Napa. we'll see tomorrow or Sunday but at least i don't have to feel guilty about not following through on my asked question.