951 spark plugs
03-06-2005, 07:15 AM
#20
Rennlist Member
Has anyone ever tried a "non-projected" tip spark plug such as: NGK BR7ES? I have read a couple books on auto ignition performance; one of them by Dr. Jacobs of Jacobs Electronics. He and others bring up the point when using forced induction, or N2O to use a non-projected tip to reduce the chance for creating hot spots. This situates the spark ~1/16" into the combustion chamber, versus a projected tip that situates the spark an additional 1/8" into the cc. I know these plugs are commonly used in motorcycles and snowmobile engines. Do you think throttle response would suffer?
TIA!
TIA!
03-06-2005, 12:53 PM
#22
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NGK's BPR7ES here as well.
03-06-2005, 12:58 PM
#23
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Originally Posted by Waterguy
The advantages of a colder plug are strictly at high boost (less risk of detonation.) The disadvantage is that they don't get hot enough under normal (off-boost) driving to burn off carbon deposits, especially under short distance, stop and go driving conditions. This can lead to poor idle, plug fouling, shorter plug life, higher emissions. If you do strictly commuter driving, I would stick with stock heat range.
Where do you find them in town Edge? And are the NGK BPR7EY essentially the same plug?
Where do you find them in town Edge? And are the NGK BPR7EY essentially the same plug?
Im pretty sure its the ES ive found there. Ill pull one today and double check.IIRC, it wasnt every Canadian Tire I went to that had them. So kinda iffy.