12a J-port plugs?? 750 Holley??
08-13-04, 11:57 AM
#1
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12a J-port plugs?? 750 Holley??
Hey everyone,
I finally got my J-port 12a and have had 3 recommendations on plugs to use. All NGK: R-4118-11.5 , R-4118-11.0 , and R-6725-11.5. I can only find the 6725's. Anyone know where to get the 4118's? Anyone ever tried more than a 650CFM carb? I have a 750 Holley that I would love to use but I am afraid it will be too much. Granted it does have vacuum secondaries which might make all the difference in the world!! I guess I'll find out soon enough!
Thanks,
Mike
I finally got my J-port 12a and have had 3 recommendations on plugs to use. All NGK: R-4118-11.5 , R-4118-11.0 , and R-6725-11.5. I can only find the 6725's. Anyone know where to get the 4118's? Anyone ever tried more than a 650CFM carb? I have a 750 Holley that I would love to use but I am afraid it will be too much. Granted it does have vacuum secondaries which might make all the difference in the world!! I guess I'll find out soon enough!
Thanks,
Mike
08-13-04, 12:37 PM
#3
Originally Posted by mgold78kilrb
Hey everyone,
I finally got my J-port 12a and have had 3 recommendations on plugs to use. All NGK: R-4118-11.5 , R-4118-11.0 , and R-6725-11.5. I can only find the 6725's. Anyone know where to get the 4118's? Anyone ever tried more than a 650CFM carb? I have a 750 Holley that I would love to use but I am afraid it will be too much. Granted it does have vacuum secondaries which might make all the difference in the world!! I guess I'll find out soon enough!
Thanks,
Mike
I finally got my J-port 12a and have had 3 recommendations on plugs to use. All NGK: R-4118-11.5 , R-4118-11.0 , and R-6725-11.5. I can only find the 6725's. Anyone know where to get the 4118's? Anyone ever tried more than a 650CFM carb? I have a 750 Holley that I would love to use but I am afraid it will be too much. Granted it does have vacuum secondaries which might make all the difference in the world!! I guess I'll find out soon enough!
Thanks,
Mike
Whatever you do, do NOT use a hot street plug like a 8 or 9 heat rating. It'll crack apexes.
750 is too much carb.
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