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

LT1 brake fitting question

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Old 10-10-2009, 08:11 PM
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Default LT1 brake fitting question

I removed my EBCM, and will replace it with an aftermarket adjustable proportioning valve. I noticed that the two lines that go from the master cylinder have 3/8"-24 fittings for standard 3/16" brake tubing, and removed them with a 12mm box wrench.

The other fitting, though, the one for the rear, is bigger. I had to use a 14mm box wrench for that one (highlighted purple in the pic below).

Would anyone happen to know what size that fitting is? I think I'll need an adapter since all of the fittings coming out of the prop. valve I'm using is 3/8"-24.

Thanks for any help/advice; here's the pic:

Old 10-11-2009, 09:54 AM
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Exclamation Turns out i am completely wrong

I thought they were Standard SAE fittings. APPARENTLY THEY ARE METRIC.

What's labeled as the 3/8"-24 fittings in the pic above are actually M10x1 fittings.

And the fitting in purple is M12x1.5, according to this information:



This is for a 95 Fbody. Mine is a 93 but I'm sure they're the same. If anyone could confirm this information that would be great.
Old 10-11-2009, 02:49 PM
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Yeah, they are the same.

The EBCM is a computer under the dash. What you removed is the ABS unit (or as the diagram calls it the "brake pressure modulator valve assembly").
Old 10-12-2009, 08:05 AM
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Ah ok. Thanks, shbox. I use your site all the time btw!!



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