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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 02-09-2008, 07:12 PM   #1
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Default my DIY turbo heat shield

the turbo is boxed in (are there any drawbacks?)
i used very light gauge .025” aluminum…..doubled up in some areas for stiffness.

http://i251.photobucket.com/albums/g...8/miata001.jpg
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Old 02-09-2008, 07:14 PM   #2
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nice work
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Old 02-09-2008, 08:50 PM   #3
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nice, make me one and i wont ban you
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Old 02-12-2008, 01:03 AM   #4
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make me one too lol, the greddy one i have is a piece of ****
i had to get it re welded
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Old 02-12-2008, 03:40 AM   #5
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more pics!!!!!!
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Old 02-12-2008, 06:45 AM   #6
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Quote:
Originally Posted by urgaynknowit View Post
make me one too lol, the greddy one i have is a piece of ****
i had to get it re welded
I see a strange trend with Greddy branded things breaking??
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Old 02-12-2008, 09:29 AM   #7
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nice work man. make them and sell them!
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Old 02-12-2008, 10:05 AM   #8
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Old 02-12-2008, 10:08 AM   #9
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nice work man. make them and sell them!
it's an idea i'm tossing around. super cheap to make......and sell.
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Old 02-12-2008, 10:09 AM   #10
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I like it. It's very similar to mine that's been on for a while. Does a good job of shielding the heat. I used some sheet metal from my old hvac unit.
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Old 02-12-2008, 10:12 AM   #11
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Quote:
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I used some sheet metal from my old hvac unit.
yup.....i as in that aisle in lowes too before i found the sheet aluminum.
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Old 02-12-2008, 10:05 PM   #12
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nice, im going to build something like that
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Old 02-15-2008, 02:45 AM   #13
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Yes, definitely nice work. The main thing to shield is radiant heat to the brake cylinder and lines. I've tracked my turbo miata (at 15psi, T28) occasionally and never had heat problems but that was always a concern in the back of my head. Your design looks like fits the purpose well. Only worry would be the mounting. Is it also mounted below to the engine somewhere or only cantilevered out from the two valve cover bolts? Will it shake and move much from the mounting or do you have other mounting points to make it solid?
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Old 02-15-2008, 10:43 AM   #14
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Quote:
Originally Posted by budget racer View Post
the turbo is boxed in (are there any drawbacks?)
only draw back i see is the AFM lol
looks good IMO
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Old 02-15-2008, 10:52 AM   #15
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Very nice. I need to fabricate something similar soon.

You might want to consider making them out of steel since steel is a worse (much worse) heat conductor than aluminum. Like at least 3 times worse. That will provide additional shielding. Stainless steel would be nice for rust prevention though it will cost more of course. Also, regardless of the material, if you leave the inside shiny (like you have done), instead of painting it black for example, it will reflect more radiant heat.
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Old 02-17-2008, 02:11 AM   #16
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Het budget racer, any pics of the back of the shield?? Like where the heater hoses are looking forward??

I ask because I just started making mine today (using diamond plate) and was wondering how to go about boxing it in...Yours looks VERY clean man!! Good job!

Also curious about any other mounting points as someone else asked..
I'm gonna be using 3 of the valve cover bolts, but was thinking about something else on the bottom...
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Old 02-18-2008, 10:49 PM   #17
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Nice, neat work.

I think it is worth considering that the shield ought to be mounted on the chassis rather than the motor. Reason is vibs. As hard as it is to imagine, the primary (up and down) imbalance of the 1.8 four cylinder turning 6000 revs is about 20 G's. Of course it doesn't go very far, as 1/2 rev later, it wants to go the other direction. Regardless, it is a source of vibration that needs dealing with.
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Old 02-18-2008, 11:22 PM   #18
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Corky how much movement from the motor have you seen, say, measured from a point on the valve cover to a point on the shock tower? Of course this will vary with torque output, motor mount condition, etc. Just wondering what is typical. I've considered removing the hood and measuring it myself.
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Old 02-18-2008, 11:24 PM   #19
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Do it man, open the hood and turn the throttle body.
The 40% stiffer MazComp motor mounts should eliminate a decen't amount of the motor "torquing" motion.
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Old 02-18-2008, 11:39 PM   #20
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I'm thinking that it would move more under load at peak torque compared to blipping the throttle? I was thinking I would remove the hood, rig up a measure with a pointer, and videotape it while driving up a hill. Crude, but cheap and effective

Not thread jacking here, just thinking about the what-ifs of a chassis mounted shield per Corky's suggestion.
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