Jets changed in 4160 - Team Camaro Tech
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post #1 of 3 (permalink) Old Apr 14th, 01, 03:43 PM Thread Starter
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joseph l clance
 
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Thanks to all that responded. I opened the float chamber and discovered the jets were 65H. I decided that going lower would not enhance performance (from other 600cfm discussions on posted topics) , so i up the jet size to 69. After installing, Man, what a noticable difference, this car really rips. Transistion into second gear is significantly stronger (like someone added 50cids)and pulles alot harder into third gear.

This 4160 has a secondary plate that is labled 134-39??? what do the numbers mean?What is the plate, and is it a good thing?

thx all
joe c.
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post #2 of 3 (permalink) Old Apr 16th, 01, 03:54 AM Thread Starter
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What is the rear secondary plate?
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post #3 of 3 (permalink) Old Apr 16th, 01, 10:14 AM
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4160's have a secondary metering "plate" with built-in fixed orifices instead of replaceable jets (4150's have a secondary metering "block" that uses the same kind of replaceable jets used in the primary metering block on both carbs). On a 4160, you have to swap out the entire metering plate instead of just changing secondary jets; the Holley site ( www.Holley.com ) has info on which number metering "plate" translates into what regular Holley jet size. Holley sells conversion kits so you can replace the metering plate with a regular metering block so you can change secondary jets instead of buying a bunch of metering plates.

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