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Old 07-03-2022, 11:03 AM
25stevem's Avatar
25stevem 25stevem is offline
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Look for marks on the throttle body of the carb where any of the 6 corners of the PV plug might be hitting which would effect metering block gasket sealing.

This does happen at times and if so grind on the plug.

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Old 07-03-2022, 02:02 PM
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TCSGTO TCSGTO is offline
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Quote:
Originally Posted by 25stevem View Post
Look for marks on the throttle body of the carb where any of the 6 corners of the PV plug might be hitting which would effect metering block gasket sealing.

This does happen at times and if so grind on the plug.
+1 Make sure the PV gasket is seated also

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68 GTO,3860#
Stock Original 400/M-20 Muncie,3.55’s
13.86 @ 100
Old combo:
462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's.
1968 Pontiac GTO : 11.114 @ 120.130 MPH

New combo:
517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's
636HP/654TQ
1.452 10.603 @ 125.09
http://www.dragtimes.com/Pontiac-GTO...lip-31594.html
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