How would a timing adjuster affect air/fuel?

StangIt #1

Founding Member
Oct 25, 2001
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Washing the Car
I'm probably going to order a Steeda timing adjuster and pulleys very soon, but am a bit concerned about the air/fuel mix after advancing the timing. I'm planning to try between 13-15 degrees of timing (this seems to be the norm before detonation for N/A GT's), but don't want the car to be running too lean/rich. Should I be concerned? Also, has anybody tried the UPR or BBK timing adjusters? Just wondering if they might be "better" than the Steeda part. Thanks in advance!
 
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