LS1TECH - Camaro and Firebird Forum Discussion

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

58mm TB

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Old Aug 23, 2007 | 05:05 AM
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Default 58mm TB
Need to purchase a coupler for my new 58 mm TB, but don't know the inside diameter.
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Old Aug 23, 2007 | 12:17 PM
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??????????????
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Old Aug 23, 2007 | 01:53 PM
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Are you talking about the intake elbow, or are you trying to make a PVC style CAI?
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Old Aug 23, 2007 | 06:10 PM
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Originally Posted by ZONES89RS
??????????????
+1 on that!!
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Old Aug 23, 2007 | 06:29 PM
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I've converted my car to Functional Ram Air. There is no elbow anymore. I need to purchase a pre molded coupler to connect the MAF to the TB. My current home made couple is 3" to 3.5", but this new 58 mm TB is bigger. MAF is 3", but the TB is oval so I'm not sure how to get an accurate size. Can I just take a string and wrap it around the TB and then measure the length of the string to give me the inside diameter of the coupler at the TB?
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Old Aug 23, 2007 | 08:48 PM
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Yup. That is what my STS does. You can make it oval when you install it. It is flexible, after all. And the same will be true for the tbolt clamp that you buy for it.
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Old Aug 23, 2007 | 09:09 PM
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Well, I had one part correct. You do measure the outside, which turned out to be 12 7/8. That equates to 12.875. Divide that by 3.14 and you have the inside diameter. Roughly 4.1. So I'll need a 3" to 4" coupler. I can stretch it to get the .1.
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Old Aug 23, 2007 | 10:52 PM
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Weird, my 58mm was the same size as my 48mm, for the outside oval diam. If it was bigger, I wouldn't be able to use my factory air cleaner stuff. But yea, I'm not sure what to tell ya short of using PCV, but that's a step instead of a nice smooth transition :\
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Old Aug 23, 2007 | 10:57 PM
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My silicone is smooth, not a step. Probably have to go to a FI site to find it.
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Old Aug 23, 2007 | 11:11 PM
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Ok, maybe use some of the rubber pieces that everyone uses on custom CAI, look on Ebay i guess?
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Old Aug 24, 2007 | 12:22 AM
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Go to a furnco 4 inch in plumbing area
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Old Aug 24, 2007 | 12:29 AM
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Imnotfast, I thought that was you I saw when I went to Walmart this afternoon!
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Old Aug 24, 2007 | 02:29 AM
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I found this site. A lot cheaper than SLP.

http://www.stylinmotors.com/reducers.html
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Old Aug 24, 2007 | 02:36 AM
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Originally Posted by koolaid_kid
Imnotfast, I thought that was you I saw when I went to Walmart this afternoon!
Was that you who picked up the box lid?
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Old Aug 24, 2007 | 02:39 AM
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http://www.hy-techroofdrains.com/pro...cocoupler.aspx

This place is high. Think it was 2bucks at lowes
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