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The Water Cooler
General Discussion
tuning a quadrajet
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<blockquote data-quote="swampratt" data-source="post: 2845767" data-attributes="member: 15054"><p>I have one on my 57 that i drive almost every day 336 gears th350 and a 350 chevy engine ..18 MPG</p><p>AFR is 18.5 at idle and power is in the 13.5 afr and cruise is 14.5.</p><p></p><p>Almost perfect.. lots of tweaking can be done to these and MPG is really no better than any other carb once you get the correct AFR numbers..</p><p></p><p>I have tested many carbs back to back for MPG and many different sizes.. all fall within 1/2 MPG of each other once dialed in..</p><p>But big power differences in different carbs..And the slosh is very important..My Q jet gets slosh issues when I get her sideways really quick and then come to a quick stop.</p><p>Drive it like you stole it.</p></blockquote><p></p>
[QUOTE="swampratt, post: 2845767, member: 15054"] I have one on my 57 that i drive almost every day 336 gears th350 and a 350 chevy engine ..18 MPG AFR is 18.5 at idle and power is in the 13.5 afr and cruise is 14.5. Almost perfect.. lots of tweaking can be done to these and MPG is really no better than any other carb once you get the correct AFR numbers.. I have tested many carbs back to back for MPG and many different sizes.. all fall within 1/2 MPG of each other once dialed in.. But big power differences in different carbs..And the slosh is very important..My Q jet gets slosh issues when I get her sideways really quick and then come to a quick stop. Drive it like you stole it. [/QUOTE]
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