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a friend purchased the flexible mica sheets from McMaster-Carr to bend and conform in tight areas that a flat rigid sheet won’t fit, but it will cost a bit more to achieve a similar 0.25” thickness, like maybe 3x using six 0.040” thick pieces. I’m not sure if he intends to go that thick though. It has the same max temp rating as the rigid mica.
btw the solid 0.25” mica piece is now $101 each.
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a friend purchased the flexible mica sheets from McMaster-Carr to bend and conform in tight areas that a flat rigid sheet won’t fit, but it will cost a bit more to achieve a similar 0.25” thickness, like maybe 3x using six 0.040” thick pieces. I’m not sure if he intends to go that thick though. It has the same max temp rating as the rigid mica.
btw the solid 0.25” mica piece is now $101 each.
.
^How's that working out for your friend? I've been thinking of doing the exact same thing with the same flexible mica sheets, and wondering how thick I'd really need to make it - 1/4" thick might not fit in the tight spots around the front LIM runner & turbo, while still leaving air gap space. Despite that, I suspect that the layered mica will have better heat transfer characteristics than an equivalently thick rigid mica sheet, because it's a laminate with air gaps between each layer. I'm probably going to do only 4 layers of the 0.04" thick flex mica, which would get it to 0.160" thick, or a wee bit thicker than 5/32"
I think a heat shield between the LIM and turbo for a single setup is pretty important. Though it will not be superior to mica, the stuff I used from “ Heat shield products” has been great. They have a number of flexible options and their “lava” has some attractive qualities. This thread here covers it ~ https://www.rx7club.com/single-turbo...d-lim-1160633/
Starting at post # 6 will have some links and I show a shield I made. It’s been holding up really great. I purchased the stainless option made out of 321 stainless version with “lava” that is rated to 1800° continuous / 2200° intermittent.
Really excited to see your writeup, and hopefully videos showing your setup soon. A lot of your posts help inspire my FD build's direction, and would love to see how you like this setup since it is on my list in long term plans for my own FD after exhausting the sequential 99 spec twin turbo setup.
Heatshield Products is great stuff. I wrapped the side sills and exhaust in my Viper and it made a MASSIVE difference in lowering in cabin temps and not nuking the paint in the side skirt.
