Who can fab a 4" elbow ?
I have a 4" cobrahead right now, that can suck closed under boost, if i could get a 4" steel elbow to fit, it would be a smooth curve of the air to flow other then the cobra head...
the walker 90 would need fab work it is tight in there....
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I hear there is a "Donut" out there that works for very limited, space challenged, guys like us that have decided to keep their A/C and run a fan shroud. I've kicked the bottom of my radiator/fan/condensor assembly as far forward as I can but still can't find anything I can use that doesn't restrict air flow...heres a pic of how tight everything is...tried a 4" aluminum elbow cut down with no luck, ATI's heavy, wire re-enforced duct directly off the blower (collapsed on itself under boost) so I think we all need to put our heads together and come up with a solution without killing our air flow and resulting in lower boost levels...
I hear there is a "Donut" out there that works for very limited, space challenged, guys like us that have decided to keep their A/C and run a fan shroud. I've kicked the bottom of my radiator/fan/condensor assembly as far forward as I can but still can't find anything I can use that doesn't restrict air flow...heres a pic of how tight everything is...tried a 4" aluminum elbow cut down with no luck, ATI's heavy, wire re-enforced duct directly off the blower (collapsed on itself under boost) so I think we all need to put our heads together and come up with a solution without killing our air flow and resulting in lower boost levels...

I have an LT1 and there is a little more room than an LS1. I had a tube fabricated, but it is a little bit restrictive... 6 psi to be exact.
They dont look as if they flow that well, but there are plenty of skylines and Supras that use them to good effect.
The larger version is 8" diameter, and can be had with a variety of mouth sizes, and would be about 3" tall.
it could maybe mount directly onto the blower ?
http://www.hksusa.com/products/?id=788
I used to use a couple ages ago on my old Rover V8 twin turbo.





