IMPROVED A/C & HEATING SYSTEM - Page 6 - LotusTalk - The Lotus Cars Community
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post #101 of 186 (permalink) Old 07-15-2011, 04:48 AM
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Originally Posted by TheViper View Post
The middle east version is an additional AC unit behind the seats here are photo's https://www.lotustalk.com/forums/f313...04/index2.html.
PM me your e-mail and I will forward a copy of my improvements.
Cheers,
Michael
Many thanks, Michael...PM sent.

I looked at the thread and it's kinda funny, because I went to the Khobar dealer here in Saudi Arabia, and I'm positive that there was no additional unit (blower and vents, not compressor) behind the seats. I looked at both Elises and Exiiges at the time. But maybe I need to go back to confirm. I'd still be interested in the part numbers....get the dealer here to order them for me and retrofit my US 2005 Elise....it should work.

Thanks again!

Stephen.

'A socialist is somebody who will take your flat-screen TV and give it to a family of meth addicts in the backwoods of Vermont.' P.J. O'Rourke

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post #102 of 186 (permalink) Old 07-24-2011, 04:16 PM
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Michael,
Thanks for all the info here. I took the car out for a few hours in the canyons with the outside temp in the 90's and although inside the car never got really cold it was MUCH better. The air coming out of the the vents was cold and stayed that way the entire trip.

I was able to wrap the flexible hose. If you cut the zip-tie for the wiper motor cover you have plenty of room to get the hose back in after wrapping. The cover seemed just as secure without the zip-tie but who knows, it is a Lotus so it could be a structural zip-tie.
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post #103 of 186 (permalink) Old 07-26-2011, 06:02 PM
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Got tired of losing the AC here in the East Tenn desert, so I made all of Michael's suggestions for improvement. Wow, what a difference. I now have real AC even in the 95+ heat that we are having this summer.
I only have one question: how long are your arms Michael? I thought that giving blood to wrap all the ducts was bad but then when I started trying to drill out the vent blank rivits I found that quite simply my arms were not long to reach the driver's side footboard and watch the drill. I had to locate the rivit, secure the drill bit and then operate it blindly. Not the best feeling. I was successful but sure made me nervous.
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post #104 of 186 (permalink) Old 07-26-2011, 06:47 PM
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I hear you... I ended up using an electric screw driver to drill out the drivers side rivets. It was straight and thin enough to clear my sector 111 pedals. Had no luck whatsoever with a regular drill...
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post #105 of 186 (permalink) Old 07-26-2011, 06:56 PM Thread Starter
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Got tired of losing the AC here in the East Tenn desert, so I made all of Michael's suggestions for improvement. Wow, what a difference. I now have real AC even in the 95+ heat that we are having this summer.
I only have one question: how long are your arms Michael? I thought that giving blood to wrap all the ducts was bad but then when I started trying to drill out the vent blank rivits I found that quite simply my arms were not long to reach the driver's side footboard and watch the drill. I had to locate the rivit, secure the drill bit and then operate it blindly. Not the best feeling. I was successful but sure made me nervous.
I had a distant relative who you may have heard of...Houdini
Welcome to the cold air club
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post #106 of 186 (permalink) Old 08-25-2011, 07:45 PM
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I just figured out that the Exige does not have nearly the access to the air conditioning components that the Elise does under the front access panels. I took mine off and I can't reach anything. I've used the search extensively and can't find an answer, but if I want to do the heat soak portion do I have to remove the front clam?
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post #107 of 186 (permalink) Old 08-25-2011, 08:13 PM
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I just figured out that the Exige does not have nearly the access to the air conditioning components that the Elise does under the front access panels. I took mine off and I can't reach anything. I've used the search extensively and can't find an answer, but if I want to do the heat soak portion do I have to remove the front clam?
Acumen, I have an '06 Exige and made an effort to wrap the A/C hose that is located under the service panels. I was not able to get a complete wrap around either the length or circumference of the A/C hose with the clam in place. The best I was able to do was to cover about 2/3 of the A/C hose. That is not to say that it cannot be done - just that I could not get it there!

The Exige has a one piece cowl mounted to the radiator (and, therefore, no insulation block at the clam's center section), whereas the Elise has a two piece cowl that can be removed to complete the heat shield wrapping along with stuffing an insulation block into the gap at the center section.

For an Exige, I have concluded that clam removal is necessary to perform the A/C hose insulation, block the fresh air inlets on the crash structure, and to upgrade the thermostat. All of these can be done on an Elise with the clam on, because its clam design offers marginally better access than an Exige has.

I ordered the thermostat upgrade from lotusgarage.com and plan to pull the clam to do the three A/C related mods, and while it is off I'll check the radiator and oil lines for wear and deal with those (if needed) while the clam is off.

2006 Exige - Phantom Black
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post #108 of 186 (permalink) Old 08-26-2011, 04:50 AM
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My 2007 Exige did have some pretty thick black foam insulation around the hose that does not appear in the pictures. In the pictures you can see the bare corrugated plastic tube, but on my car it is covered in black foam. Does your 2006 have that? I would still wrap it with Frost King if I had sufficient access.
I think I understand what you mean about the one-piece radiator blocking piece, so does that mean that it is unnecessary to plug and insulate the center section, or would it still be beneficial. I didn't seem to have sufficient access to that either, I really couldn't cram my hands in there. Perhaps someone with the clam off of an Exige could offer an informed perspective or better yet some pictures?
My AC performance has actually been very good. I do not have experience with any other Elises or Exiges, but mine was able to keep up in high 80 degree F weather so far, but I live in south Florida so I might as well squeeze every bit of performance out of the system. I will not be taking the clam off to do so though.
I did drill out the driver's side footwell panel. I left the passenger side because it is only partially blocked so I want to see the difference with removing the completely blocked driver's side panel first.
My Exige has the driving lights in the lowermost center grill and right next to the lights there is enough room to slip an arm in so I can actually block the front vents without removing anything. Unfortunately Home Depot did not have black duct tape, so that will have to wait for another day.

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Acumen, I have an '06 Exige and made an effort to wrap the A/C hose ...
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post #109 of 186 (permalink) Old 08-26-2011, 06:02 AM
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Acumen, my '06 Exige had no insulation or foam on the A/C hose. However, even with no OEM insulation it is very difficult to access the entire A/C hose.

As you concluded, the one piece design of the Exige cowl eliminates the gap between the Elise's two piece cowl and need for a block of insulation under the clam's center spine.

I drilled out the footwell vent covers, and it made a huge difference in the volume of air that is recirculated.

Good new for you about being able to reach the inlets through the driving light openings.

If your car is an '07, it likely has the upgraded thermostat.

2006 Exige - Phantom Black
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post #110 of 186 (permalink) Old 09-18-2011, 12:47 PM
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Since the summer heat has finally broken here in Tn, I went back into the clam thru the front grill and removed the tape off the fresh air ducts. I dont plan any other changes to the system unless I get bad results or some feedback from y'all at the forum. Not sure what the backflow issue has been with other cars so I guess I will see.
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post #111 of 186 (permalink) Old 09-20-2011, 08:58 PM
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I just insulated the sill following the example here. Putting on the insulation was easy, but getting the fabric to be perfect was very hard. The good news is that it looks good to the casual observer. Forecast high temp for my track day on Friday is 95 degrees -- a good test.
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post #112 of 186 (permalink) Old 09-23-2011, 06:03 PM
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I just insulated the sill following the example here. Putting on the insulation was easy, but getting the fabric to be perfect was very hard. The good news is that it looks good to the casual observer. Forecast high temp for my track day on Friday is 95 degrees -- a good test.
It was 104 degrees at Big Willow today
The sill insulation worked great! Instead of burning my leg on the sill, it was comfy. I highly recommend this mod!
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post #113 of 186 (permalink) Old 09-24-2011, 12:55 PM Thread Starter
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You are the only person I know off that has done this mod, besides myself. I have to say, it does reduce cabin temperatures, so that the poorly designed AC can better cope. Glad you like it.
Michael
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It was 104 degrees at Big Willow today
The sill insulation worked great! Instead of burning my leg on the sill, it was comfy. I highly recommend this mod!
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post #114 of 186 (permalink) Old 09-24-2011, 03:08 PM
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Michael,

A friend of mine, Mara, is interested in doing it too. I've imagined how a kit could be made to make installation easier (neater), in case there is interested...

Thanks again for all your good pointers.

Joe
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post #115 of 186 (permalink) Old 09-25-2011, 08:37 AM Thread Starter
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I do have a patten available.
Michael
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post #116 of 186 (permalink) Old 09-25-2011, 12:55 PM
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Hi Michael,

That would save some time. In what form is it? Something that you could post or email? Or something you could fd up and snail mail?

Thanks,

Joe
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post #117 of 186 (permalink) Old 04-11-2012, 08:22 PM
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So I've been meaning to insulate my car for a while but when I was fixing the resistor pack issue a while back I notice a part missing.

It's the one the arrow points to here.



Is that part number 25 on this blowup?


2005 Elise, Nightfall Blue
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post #118 of 186 (permalink) Old 04-12-2012, 04:07 AM Thread Starter
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It is not shown. You can, however, just use the self adhesive metallic foam backed insulation to block off the spline.
Michael
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post #119 of 186 (permalink) Old 05-03-2012, 11:45 PM
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SirLotus,

Hi, i have done some of the modifications that you suggested in my elise and it really helped. Thanks!(covering the front duct, spline and radiator cowl, tinting the car with 98%heat rejection tint) but i havent done the removal of the footwell panels.

I would like to know if i remove the panels will my evaporator(cooling coil) suck all the dust on the carpet and shoes? If so, it will eventually clog it and servicing it will be very hard due to its location. Another thing if i accidentally drop the rivet while drilling will it rattle inside the car?..

Last edited by Saketome; 05-04-2012 at 12:45 AM.
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post #120 of 186 (permalink) Old 05-04-2012, 03:57 AM
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FYI, against my expectations, 2 layers of tint on my rear glass has really helped. Lotus Europa SE. May help exige owners?

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