shroud help please

i have a fedco 2-342 hc with 2x120 38mm in a pull config when i built my shroud i had it 1/4 inch from hc to fan is this enough space ive seen others have around 1 inch anyone got any suggestions?

IMO, 1/4" isn't enough room. I've always heard 1-1.5" is the best. If you're getting good temps leave it alone.

yeah, I read 1" is the best distance.