Going to try making a fan shroud. 240Z

[XplosiveLugnut 0]

Recently I had a bit of a rad-hit-fan snafu. I had the rad recored ('murica) and am now using a 280Z 8 blade clutch fan instead of the 5 blade flex fan that it had when I bought it. It's never had cooling issues while driving, but it can now sit idle far longer before it starts to heat soak and run poorly/try to die.

 

I've decided to try and fix this altogether with a fan shroud.

 

Now for the question!

 

Can anyone get me the inner diameter of a 280Z's shroud opening? I don't want to make the opening too small and the engine rock the fan into the shroud. I figure what ever Nissan came up with would be a safe option.

 

Thanks!

[ritrebor 0]

18"

 

ritrebor

[XplosiveLugnut 0]

Excellent! Thanks!