Fan Shroud with Velocity Ring ( Factory Shroud)

[rockerarm]

I would like to find out if anyone out there is using the '75 thru '79 type 1 fan shroud that has the velocity ring on it. I have access to one and am considering using it. Application is a 1600, dual port, Kadrons, full-flow, and sump. Using a stock reground cam from Web Cams with HD single springs. Compression will be 7.75:1 ( 44cc chambers with .100" deck). Long block is a low budget Pic a Part engine I bought and refreshed and added bolt-ons from previous engine.

If nobody has any experience with this I am open to ideas on procedures to compare with the earlier dog house shroud. Engine will be equipped with Hoover bit, foam on the oil cooler, and the complete flaps assy minus the thermostat as I am not paying that much for one. Would like to decide this in a couple days as long block is together now waiting for its tin and accessories. Thanks in advance, Bill

[perrib]

All the testing was done by VW years ago and revisted by Jake Raby. You might as take advantage of their knowledge. I have that fuel injected shroud on my 2180. Just a suggestion, stick a CB performance 2231 or a 2332 it will gain very noticable bottom end torque, idle smooth with just a hint of exhaust note.

[CLKWRK]

I have two EFI engines with those shrouds full tin and thermostats, they both work well.
As far as I can tell there were at least two versions of FI shrouds,
early FI with venutri ring, large negative oil cooler scoop, doghouse style flap linkage and hover bit,
late FI with venturi ring, small peanut shaped oil cooler intake hole (offers more engine cooling, less air to the oil cooler, I have an external oil cooler/oilTstat anyways), simplified flap linkage (has only 1 bar, less linkage play), and no hover bit needed (it fits tight around the oil cooler)
IMO the late FI shroud is the best shroud for a big engine that wants to retain all the stock features like Tstat and heaterboxes.
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[krusher]

Why did you bother with HD springs on a stock cam?
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(06:31:07) RoachGhia: "i drink dick way too fast"

[lupin..the..3rd]

I took a doghouse shroud from a carb motor and added the venturi ring. I forgot who makes the ring, but I found it on the classifieds here and welded it on. I didn't do any before-after comparison though so I can't tell you what difference it makes.

[Bruce Amacker]

[RockCrusher]

I looked at the link and that is indeed a nice little venturi ring but the factory made it just enough to be cheap and do the job adequately as they had extra heat problems due to the emissions crap and lower compression. For us it would be nice if this repro company had extended it out further than the edge of the existing opening. Yep, it should work fine the way it is but could have been so much better for the $50

RC
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