58 WCFB 2x4 2nd Idle Adj By-pass Screw
10-20-2014, 05:48 PM
#1
Instructor
Thread Starter
58 WCFB 2x4 2nd Idle Adj By-pass Screw
Hi All:
Service bulletin show secondary idle adjustment by-pass screw located on base plate drive side. This is in addition to the mixture screw located in front of Carbs and idle speed screw on side.
Which Corvettes & Years have this feature? My 1958 2x4 do not have this.
Thanks,
Eric
Service bulletin show secondary idle adjustment by-pass screw located on base plate drive side. This is in addition to the mixture screw located in front of Carbs and idle speed screw on side.
Which Corvettes & Years have this feature? My 1958 2x4 do not have this.
Thanks,
Eric
10-20-2014, 06:56 PM
#3
Team Owner
ONLY the '56 and some early '57s (or so I have been told) had the idle air bypass feature...
Your '58 should not have this in either carb (dual quads)...
Your '58 should not have this in either carb (dual quads)...
10-20-2014, 11:01 PM
#4
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This is correct.This was only a 56 2x4 feature, BUT, apparently some well documented VERY EARLY 57s also had the secondary screws.