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#1
06-15-2018, 02:39 PM
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Test and tune
Hi all,
Going to text n tune tonight, Holley 4150 hp with 80 main and 90 secondary jets, also it has a white spring in the vacuum secondary. Do I start with jetting or secondary spring changes? Also for jet changes should I change primary and secondary or just secondary? Thanks |
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#2
06-15-2018, 03:19 PM
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What size carb? Is it out of the box or already been tuned on?
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#3
06-15-2018, 03:31 PM
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950, I just did a cam swap i went for less overlap and moved the intake centerline from 108 to 112. should I go up to 82/92 and see if it gets more mph? If it doesn't try 78/88?
Thanks |
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#4
06-15-2018, 06:00 PM
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I would make 2 runs as is to get a base line. Then increase or decrease the secondaries by 2. Make 2 more runs to see whats up. Tune from there. Always make 2 runs to see a change.
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