4gen fans mounted on a 3 row Champion Radiator Fan Shroud.

 

More pics

 

Looks good.

 

You might want to think about venting that shroud a bit....it will create a damming effect at higher speeds where hot air will get trapped. If you suddenly come down from a hood speed and then idle around @ low speed and have the temps creep up, that is an indication of it. Take a look at the factory LT1 shrouds and you'll see what I mean. Plus plastic doesn't retain heat like metal does....even aluminum retains some radiant heat.

 

If you look at the fans closely you will see that the fans are spaced after the third blade. It will let the air flow through them when the fans are not turning.

 

I was referring to the shroud itself not being vented. The 4th gen shrouds are vented for the purpose of relieving pressure @ higher speeds no matter the blade design. But, it'll be interesting to see some numbers on it if the weather gets warm enough to gauge it. Keep us posted!

 

The LS fan shroud is not vented. So far it is keeping it cool even with the A/C on sitting still. The engine now is a 388cu.

 

Ah....OK, I was referring to 4th ten LT1 shrouds....they use the same motors and blades. I've never had a chance to use an LS1 4th gen shroud.

 

Do you have any pics of your fan setup? I want to mount a set on my 91Z28. I'd like to see how it was done.

 

This is how an LT1 fan setup looks on a stock type radiator. The relay bank you see is my 3-speed setup-the fans can also be wired in series for 2-speed operation using 3 relays.

 

Where did you get that shroud?
The ones I have seen sold for the Champion rads are only single fan.

 

It came from Champion. They make them.