So this is anecdotal, but I do know of two people who, at the same time used side scoops on one beetle, and a roof scoop on the other (with a cool flame job on a pseudo dune-style bug). Neither has stock engines. The side scoops were not at all effective, and the owner ended up with a new decklid. The roof scoop was, in contrast, pretty effective, but still not ideal.
This was actually the opposite of what I expected. Disclaimer: I am not an aeronautical engineer. But ... I can imagine the faster flowing air over the surface of the curved hood and roof creates a slight vacuum. That might reduce the amount of cool air unless the scoop goes as close to the windshield as possible. The side scoops might not have that vacuum, so I expected them to be more effective. Also, there was more area for a greater volume of air to enter. I think perhaps the lack of vents combined with the scoops just created turbulence and trapped warm air, and the flat(ish) undercarriage did not create enough vacuum to pull the warm air out. This is an observation based on no data and two vehicles 20 years ago, but that's all I've got. :-) > On Oct 3, 2022, at 12:57 PM, 'Ray Yoder' via VintagVW - Air Cooled Volkswagen > Discussion List <vintagvw@googlegroups.com> wrote: > > Things are looking up. A vintagVW post > > Sent from the all new AOL app for Android > <https://play.google.com/store/apps/details?id=com.aol.mobile.aolapp> > On Mon, Oct 3, 2022 at 1:02 PM, D Johnson > <dean.g.johns...@gmail.com> wrote: > I'm asking for a friend... Actually this is a theoretical question only, I'm > not really thinking about doing this. > > Has anyone converted the Super Beetle moon-shaped air inlets behind the rear > quarter panels to route cool air to the engine compartment? > I know I've seen engine-swapped beetles with air intakes in plexiglass rear > quarter windows. But for a stock engine, if you wanted to use a non vented > deck lid, could you get enough air through the side vents if you put scoops > on them? I'm intellectually curious if this has been done and what internal > modifications would need to have been made. > > I"m putting a new gas tank in my '71 super and will be trying to resurrect > the dual carbs this winter, hoping to have it on the road again next year. > It's been off the road due to both a catastrophic transaxle failure and a > near catastrophic valve failure since 2008. Life happens. > Fingers Crossed and I hope everybody is staying safe and sane out there. > > Dean > > > -- > Visit the VintagVW archives at > http://www.mail-archive.com/vintagvw@googlegroups.com > <http://www.mail-archive.com/vintagvw@googlegroups.com> > > For help with posting messages, subscribing, unsubscribing or other needs > send a blank email to vintagvw+h...@googlegroups.com > > For any other questions (subscription status, problems) write to the list > owner at vintagvw+ow...@googlegroups.com > --- > You received this message because you are subscribed to the Google Groups > "VintagVW - Air Cooled Volkswagen Discussion List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to vintagvw+unsubscr...@googlegroups.com > <mailto:vintagvw+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/vintagvw/CAOm0kBnBq46tJCC5VJX5xQJDXMQwEiHmZ_62ky9z0P3rS8Xx6A%40mail.gmail.com > > <https://groups.google.com/d/msgid/vintagvw/CAOm0kBnBq46tJCC5VJX5xQJDXMQwEiHmZ_62ky9z0P3rS8Xx6A%40mail.gmail.com?utm_medium=email&utm_source=footer>. > > -- > Visit the VintagVW archives at > http://www.mail-archive.com/vintagvw@googlegroups.com > <http://www.mail-archive.com/vintagvw@googlegroups.com> > > For help with posting messages, subscribing, unsubscribing or other needs > send a blank email to vintagvw+h...@googlegroups.com > > For any other questions (subscription status, problems) write to the list > owner at vintagvw+ow...@googlegroups.com > --- > You received this message because you are subscribed to the Google Groups > "VintagVW - Air Cooled Volkswagen Discussion List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to vintagvw+unsubscr...@googlegroups.com > <mailto:vintagvw+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/vintagvw/2041660116.2207302.1664819827995%40mail.yahoo.com > > <https://groups.google.com/d/msgid/vintagvw/2041660116.2207302.1664819827995%40mail.yahoo.com?utm_medium=email&utm_source=footer>. -- Visit the VintagVW archives at http://www.mail-archive.com/vintagvw@googlegroups.com For help with posting messages, subscribing, unsubscribing or other needs send a blank email to vintagvw+h...@googlegroups.com For any other questions (subscription status, problems) write to the list owner at vintagvw+ow...@googlegroups.com --- You received this message because you are subscribed to the Google Groups "VintagVW - Air Cooled Volkswagen Discussion List" group. To unsubscribe from this group and stop receiving emails from it, send an email to vintagvw+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/vintagvw/64DEC084-C919-4185-B7D5-8D7F4674B4C1%40uner.com.
