what wrong with TR6's?
08-10-2011, 12:21 AM
#21
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Right now, I am using the projected TR6, mainly because I didn't know the benefits between projected and non until now.
It runs fine, starts up every time, and pulls strong, but it is also the only type of plug I have run with the blower, so I don't have any basis for comparison.
It runs fine, starts up every time, and pulls strong, but it is also the only type of plug I have run with the blower, so I don't have any basis for comparison.
08-10-2011, 12:45 AM
#22
The reason you would use the non-projected tip is this.
Forced induction & nitrous setups have highly increased cylinder pressures, with more fuel being burned per revolution. The spark plug electrode hanging way down there in the combustion chamber "can" end up getting so hot that it effectively becomes a "glow plug", thus pre-igniting the fuel charge. This is detonation, and you all know what that causes.
Non-projected tips are safer for this reason alone. The colder plug also "pulls" more heat off the electrode, which helps also. But when you go too cold of a plug, you introduce daily driveability problems.
I recommend non-projected tip plugs for 100 shots or bigger, and 5 psi or more. Reading the strap "color-change" will help you determine heat range. Typically, the more cylinder pressure & fuel you're burning, the colder plug you'll need. But it's ultimately up to you to read your plugs, and datalog your runs, to find out what your own combo wants(needs).
Forced induction & nitrous setups have highly increased cylinder pressures, with more fuel being burned per revolution. The spark plug electrode hanging way down there in the combustion chamber "can" end up getting so hot that it effectively becomes a "glow plug", thus pre-igniting the fuel charge. This is detonation, and you all know what that causes.
Non-projected tips are safer for this reason alone. The colder plug also "pulls" more heat off the electrode, which helps also. But when you go too cold of a plug, you introduce daily driveability problems.
I recommend non-projected tip plugs for 100 shots or bigger, and 5 psi or more. Reading the strap "color-change" will help you determine heat range. Typically, the more cylinder pressure & fuel you're burning, the colder plug you'll need. But it's ultimately up to you to read your plugs, and datalog your runs, to find out what your own combo wants(needs).
08-12-2011, 11:02 AM
#23
I just bought the #3346's. Since i need to replace my plug wires because they thought touching the header was okay I am gonna swap from the projected TR6 to the non-projected TR7. I am guessing those colder f'ers will ruin my awesome 10MPG. 
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