Whats the best alum rad double or tripple pass?

[stealth-hp]

For a 375 hp engine in a dirt metric car what will be the best radiator to keep it cookl a double or triple pass? Any recommendations?

[SRXSRULE]

You didnt list the best option....... Single pass !

Several posts on here about this. Key items are a great water pump, 1-1 pullies, a good fitting shroud thats sealed up good, no restrictor (you might end up needing a racing thermostat) and a good fan. Eric

[stealth-hp]

so single pass with many rows? I see you can get 2 or 3 rows?

[JustAddDirt]

what are the widths of the rows?
I think a 2 row with 1-1.25" cores is best.
if you get more than 2, water is staying in radiator too long. (just like a 2-3 pass)
just my opinion though.
as stated the key is a good fitting shroud, and the GM 405442 fan AC Delco also has the same fan different part number much cheaper.
Stewart stage 2 or 3 water pump.
1-1 pulleys.

[stealth-hp]

So a single pass is the way to go?

[SRXSRULE]

Yes, a single pass properly set-up works so well you will need to install a t-stat or it wont get up to temp until about the end of the feature.

Make sure you clean it out after every night of racing. Wash out with a garden hose from the inside out. Some of those flex head flower watering wands work awesome to get in through the fan/shroud. Eric

[stealth-hp]

Do you guys have a brand in mind to look at?

[JustAddDirt]

I run an AFCO currently ,but ALLSTAR units are a nice piece as well.
I once had a PRC that the tubes swelled up and crushed the cooling fins together. motor was 215º. not good.

[SRXSRULE]

http://www.northernfactory.com/HIGH_PERFORMANCE

I ran these radiators for about 10 years. They performed awesome, and the only time I ever had to replace them was from crash damage. Plus they are made in the USA. Eric