After removing and reinstalling my front clam a few weeks ago, I've noticed that I'm missing the clam spline hot air dam. Does anyone have any good pictures of what it looks like or a part number or alternative solution?
It's the "hot air dam" in the picture.
I did the same... I don't notice much difference at all and I even installed the hot air dam which was missing previously.Just wrapped the duct and shroud pieces off the radiator today, looking forward to seeing how this does during our next hot day out.
Nice and easy install for a potential big benefit.:clap:
Did you make something to act as a hot air dam or buy a replacement piece? I just fixed my resistor pack problem and was going to do the insulating thing as well but that part is also missing on my car.I did the same... I don't notice much difference at all and I even installed the hot air dam which was missing previously.
I'm planning on doing the footwell and front vent mod next...
I haven't had my Elise long enough to contribute much here, but went through a prolonged war against intake air temperatures (airbox, not cockpit) in a production-based race car, spending countless hours on track and $$$ at the dyno with data logging to make sure I wasn't BS-ing myself.
With some coaxing from a turbocharger engineer, one thing I learned is this ridiculously expensive gold stuff ...
Pegasus - Self Adhesive GOLD Reflective Heat Barrier Film
... is amazing at keeping the thing you want to keep cold from being affected by the thing that is emitting the heat. In my case, I ended up wrapping intake and cooling plumbing that was near radiators and exhaust, and I had dramatically better results doing this than using "heat wrap" on the exhaust and silver foil/fiberglass "insulation" tape on the intake plumbing.
Anyway, based on this background, I would be interested in whether Viper or anyone else thinks there are any strategic places where the high-$$$ gold stuff might be worth it in the Elise A/C mod application?
My first thought was the accordion duct shown in #3 of Viper's writeup, just because it is similar to the application I was testing.
I'm also wondering how much of the #1 and #2 gains are due to sealing of gaps versus the "insulation" (or reflectiveness?).
I know what the effectiveness of the material CAN be, but all my testing was for a completely different application ...so what I really don't know is how it will translate to this Elise HVAC matter.
In my case I undoubtedly had plenty of radiant sources (primarily the header) but also all the conduction and convection from the rest of the engine bay.
In my case, all the insulation and gap-sealing didn't drop air temps any (but the gap-sealing did drop coolant temps) ... but when I topped the insulated air intake plumbing with the gold foil I got about a 10 degree drop (down from 114 F) when everything was fully heat soaked.
Can you hazard any guess as to how much of what you are trying to combat with the Elise HVAC is radiant in nature? I was specifically curious about the "Radiator Cowl" piece.
(I think I just figured out that the other posters are referring to the photo numbers 1, 2, 3, and I was referring to the numbered paragraphs in the write-up.)
Michael/Viper, showed your document to my Lotus distributor to help me with, as it's there for it's first servicing. It's 30C here daily, with high humidity, so you can imagine I'll appreciate any benefit it brings to the Europa (although the Europa has quite a bit more insulation on the sills/ engine already)I do believe that the the sealing of the gaps is highly efficient at reducing heat soak, however I would also refer to the procedure as insulating.
I just purchased my first Elise. A pristine Aspen white 2006 with only 7,500 miles on the clock.
The car is gorgeous and runs incredibly well.
The owner was a real fanatic about keeping it clean and unfortunately before I arrived to buy the car, he had the engine bay and working parts of the front clam 'professionally' cleaned. He thought it was a nice gesture.
The last thing I wanted was some guys spraying oil solvents and high pressure water anywhere near the engine bay...but alas....
To my point. The AC runs adequately (i'm sure I'll start doing some of Viper's mods in the near future), but there is a very distinct smell of gas/oil engine-cleany type smell blowing in from the vents when activated. I suspect there is still some cleaning solvent residue still hanging around close to the HVAC intake.
The problem is, I'm not sure where that intake is. I've read through Viper's excellent document and if I understand it correctly, most of the air is being taken in from the cabin all of the time, with outside air being drawn in from behind the front grill when recirc is not enabled.
Is this correct? And, if so, given the above engine / front clam cleaning scenario, are there any other spots where outside air could be getting pulled into the HVAC stream?
Thanks so much for your help!