2017 Sierra 6.2L Maggie TVS1900 Tune
05-03-2018, 10:36 AM
#22
i wouldn't run a non-projected tip plug on a DD truck, just gap them down no more than .03 no need to go lower on lsx. I tried a few different plugs and came back to the factory Ac-delco's as most of the other ones broke up during my pulls on the dyno or hwy pulls after a few miles.
Maybe it was just my tune, but either way a 2step colder plug with a non-projected tip is ok if your just running at the track, but not for an everyday driver with low-boost cause they will foul up fairly quick.
Maybe it was just my tune, but either way a 2step colder plug with a non-projected tip is ok if your just running at the track, but not for an everyday driver with low-boost cause they will foul up fairly quick.
05-04-2018, 07:53 PM
#24
Staging Lane
Thread Starter
That's what I've been looking at. The reach is significantly different. I believe the thread reach on the stock plugs is 25mm (which is 0.98in) and the NGK BR6EF and BR7EF are 18mm (which is 0.709in). The Brisk plugs look like they are the same size as the stock plugs, but they're so expensive...about $10 each. What should I get if I want a colder plug with a smaller gap? Or should I just regap my stock plugs and not go colder? The tuner, Black Bear Performance, said that regapping won't help, but a colder plug might.
Just to throw it out there, I ran about 2.5gal of 91 octane with 2.5gal of 100 octane last night on the more aggressive tune (the tune referenced in the original post) and nearly all of the ping was gone. It only had a very slight ping when getting into heavy load from a 15-25mph coasting speed (that same tune pings all the time under the same conditions with 91 octane as well as getting into heavy load while already going at highway speed). While running the weaker more conservative tune with timing pulled and 91 octane, I see the same thing as the aggressive tune on 95 octane...just the initial slight ping when really getting into the throttle.
Just to throw it out there, I ran about 2.5gal of 91 octane with 2.5gal of 100 octane last night on the more aggressive tune (the tune referenced in the original post) and nearly all of the ping was gone. It only had a very slight ping when getting into heavy load from a 15-25mph coasting speed (that same tune pings all the time under the same conditions with 91 octane as well as getting into heavy load while already going at highway speed). While running the weaker more conservative tune with timing pulled and 91 octane, I see the same thing as the aggressive tune on 95 octane...just the initial slight ping when really getting into the throttle.
Last edited by Mileguru; 05-05-2018 at 12:11 PM.
05-07-2018, 08:07 AM
#25
That's what I've been looking at. The reach is significantly different. I believe the thread reach on the stock plugs is 25mm (which is 0.98in) and the NGK BR6EF and BR7EF are 18mm (which is 0.709in). The Brisk plugs look like they are the same size as the stock plugs, but they're so expensive...about $10 each. What should I get if I want a colder plug with a smaller gap? Or should I just regap my stock plugs and not go colder? The tuner, Black Bear Performance, said that regapping won't help, but a colder plug might.
Just to throw it out there, I ran about 2.5gal of 91 octane with 2.5gal of 100 octane last night on the more aggressive tune (the tune referenced in the original post) and nearly all of the ping was gone. It only had a very slight ping when getting into heavy load from a 15-25mph coasting speed (that same tune pings all the time under the same conditions with 91 octane as well as getting into heavy load while already going at highway speed). While running the weaker more conservative tune with timing pulled and 91 octane, I see the same thing as the aggressive tune on 95 octane...just the initial slight ping when really getting into the throttle.
Just to throw it out there, I ran about 2.5gal of 91 octane with 2.5gal of 100 octane last night on the more aggressive tune (the tune referenced in the original post) and nearly all of the ping was gone. It only had a very slight ping when getting into heavy load from a 15-25mph coasting speed (that same tune pings all the time under the same conditions with 91 octane as well as getting into heavy load while already going at highway speed). While running the weaker more conservative tune with timing pulled and 91 octane, I see the same thing as the aggressive tune on 95 octane...just the initial slight ping when really getting into the throttle.
05-08-2018, 08:19 AM
#26
Just realized my previous question was kind of dumb, can't put an LSA blower on this truck 
I might have Justin look into the transient airflow prediction coefficients. I've been able to greatly improve blower response by utilizing non-zero coefficients for MAP transients on tip-ins. Throttle position coefficient adjustment may help as well.
I might have Justin look into the transient airflow prediction coefficients. I've been able to greatly improve blower response by utilizing non-zero coefficients for MAP transients on tip-ins. Throttle position coefficient adjustment may help as well.
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