radiator

poo slinger · Post by **poo slinger** » Fri Nov 28, 2008 12:17 am

what sort of capacity rad will i need for a 3.9?

topcatcustom · Post by **topcatcustom** » Fri Nov 28, 2008 8:32 am

A 3.9 one?!

I was wondering if there is any sort of rule as to how big a rad you need to how many bhp the engine has- or something along those lines...

ChrisJC · Post by **ChrisJC** » Fri Nov 28, 2008 11:42 am

I go for the biggest I can physically fit, which is especially important if you are using an electric fan!

Chris.

Ian Anderson · Post by **Ian Anderson** » Fri Nov 28, 2008 2:43 pm

I agree with Chris
As big as possible
But I have also heard that after 4 rows adding extra rows makes the radiator heavier but may not increase cooling
Basically once the air has passed 4 cores it is so hot already it will not absorb any / more heat but the extra restriction in the flow may reduce the overall flow of air theough the rad and make the whole thing less efficient!

Make sense?

Ian

topcatcustom · Post by **topcatcustom** » Fri Nov 28, 2008 3:00 pm

Crystal!

Alley Kat · Post by **Alley Kat** » Fri Nov 28, 2008 3:32 pm

My old one ran for yrs with a Volvo 240 rad, then I put a 740 alloy one (think it was) of same dimensions, off a 2 litre car. Leccy puller fan.

poo slinger · Post by **poo slinger** » Fri Nov 28, 2008 5:41 pm

well i only have a small engine bay for it to fit in, this radiator is a little bit 2 wide but would it be good enough?

car is going to be around 200bhp.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0120492326

Ian Anderson · Post by **Ian Anderson** » Fri Nov 28, 2008 10:12 pm

Couple more bits of info I have heard - so I advise but may not be correct

Need a miimum of 1/3 of the area of the rad as the "hole" in the front of the car / grill area

The back of the rad should be as free of restrictions as possible.

My Rad in the Gt40 is 12 *24 inches made by Docking and was said to be good for up to 600hp and was an absolute piect of craftsmanship.
So this size is about 30 *60 cm or 1800sq cm
yours is about 40 *40 or about 1600sq cm

The one good thing about it is that it is square and thus you should be able to get a 16 inch fan on it (mine uses 2 * 11 inch)

A 16 inch fan will move about 1800cfm and my 2 ultra power ones move about 780cfm each or a little short of 1600 so you should be fairly good to go.

And I would love a rad that cheap Mune was over 4 times the e bay price! But mention GT40 and people see £££££ signs!

Ian

poo slinger · Post by **poo slinger** » Sun Nov 30, 2008 10:41 pm

this 1 is a little 2 big tho

poo slinger · Post by **poo slinger** » Wed Dec 03, 2008 9:55 pm

what do you think about this 1

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... TQ:GB:1123

it will fit

size is 360x415x45

hope its not going to be 2 small but nice n cheap