I am looking for some measurements of the big port 3400 UIM gaskets. IIRC they should be 13.75" in length and about 2.5" width? If someone could list the exact size that would be great.
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Looking for some measurements
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3500 gaskets are bigger on the inside, but for the most part just like a 3400 gasket. You can cut a 3400 gasket to match the 3500 gasket. Oh, and FWIW my 3500 plenum had smaller ports than my 3400 LIM. I had more port matching to the 3400 gaskets on the 3500 plenum than then 3400 LIM took. But was easy - no runners.sigpic New 2010 project (click image)
1994 3100 BERETTA. 200,000+ miles
16.0 1/4 mile when stock. Now ???
Original L82 Longblock with LA1, LX9, LX5 parts
Manifold-back 2.5" SS Mandrel Exhaust. Hardware is SS too.
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3400 LIM ports compared to 3500 UIM ports, 3400 was larger. There was less material to remove to gasket match the 3400 LIM to the 3400 gasket than the 3500 UIM to the 3400 gasket.
But 3500 UIM gaskets (metal with rubber) have larger holes than a 3400 gasket stock for stock.
Hope that clears it up.sigpic New 2010 project (click image)
1994 3100 BERETTA. 200,000+ miles
16.0 1/4 mile when stock. Now ???
Original L82 Longblock with LA1, LX9, LX5 parts
Manifold-back 2.5" SS Mandrel Exhaust. Hardware is SS too.
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