My engine doesn't like NGK TR7's
I have over 6000 miles on br7ef's with no issues, daily driving, 700 + mile road trips cruising around 1500 rpm. I used to have a lot of mis fire issues with my stock coils and msd wires. I upgraded to the D585 coils and run firecore wires, no more high rpm misfires for me. 14.0 is kind of rich afr especially if you have a cam with decent overlap. I shoot for around 15.1 as it produces the most crisp idle.
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From: Lake Tapps, WA
I have over 6000 miles on br7ef's with no issues, daily driving, 700 + mile road trips cruising around 1500 rpm. I used to have a lot of mis fire issues with my stock coils and msd wires. I upgraded to the D585 coils and run firecore wires, no more high rpm misfires for me. 14.0 is kind of rich afr especially if you have a cam with decent overlap. I shoot for around 15.1 as it produces the most crisp idle.
Also before swapping out the BR7EF's the 2nd time I also changed to truck coils and Grantelli wires thinking it would clear up the misfire.
Last edited by mike13; Jul 24, 2012 at 09:30 AM.
Man, using a projected tip plug is just playing with fire especially at some of the boost levels being tossed around in here.
Do my B9EFS drive like a TR55...no. However they don't pop or misfire or break up at all. I do run Autolite 103's on the street driving to and from the track(equivalent to a projected tip 7 range NGK) and then swap to the B9EFS at the track.
I just don't see how a BR7 can cause issues when I and so many others have done nothing but just throw them in in lieu of a 6 range and run fine.
The Denso is a good plug though and a lot of new modern boosted cars from the factory run them. They are just pricey.
Do my B9EFS drive like a TR55...no. However they don't pop or misfire or break up at all. I do run Autolite 103's on the street driving to and from the track(equivalent to a projected tip 7 range NGK) and then swap to the B9EFS at the track.
I just don't see how a BR7 can cause issues when I and so many others have done nothing but just throw them in in lieu of a 6 range and run fine.
The Denso is a good plug though and a lot of new modern boosted cars from the factory run them. They are just pricey.
possibly helpful thread
https://ls1tech.com/forums/forced-in...s-crosses.html
i used to run autolite 103 (taper)
then switched to ngk tr6 for longer life
i used to run ar3911 (no resistor)/(gasket seat)
then switched to ngk 7173 for longer life (non resistor)
then switched to ngk 2668 for better drivability (resistor)
if you are on a stock computer make sure you are on a resistor plug
https://ls1tech.com/forums/forced-in...s-crosses.html
i used to run autolite 103 (taper)
then switched to ngk tr6 for longer life
i used to run ar3911 (no resistor)/(gasket seat)
then switched to ngk 7173 for longer life (non resistor)
then switched to ngk 2668 for better drivability (resistor)
if you are on a stock computer make sure you are on a resistor plug
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From: Lake Tapps, WA
Thanks David.
Fbodyjunkie what are your concerns with running projected plugs? Is it combustion chamber heat?
390/etp heads 706/649hp/tq 14% slippage thru torque converter @9lb's
11.2afr's, 95 octane (mix of trick114) 100% meth injection.
I'm thinking I should be fine with TR7IX's any compelling reason I should change them out?
Fbodyjunkie what are your concerns with running projected plugs? Is it combustion chamber heat?
390/etp heads 706/649hp/tq 14% slippage thru torque converter @9lb's
11.2afr's, 95 octane (mix of trick114) 100% meth injection.
I'm thinking I should be fine with TR7IX's any compelling reason I should change them out?
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😂😂😂😂.
now I’m curious. I wanna take the br7ef out of my nitrou truck and out tr6s in and compare
and another guy said above not to run 14/1 with a big cam as it is too rich... and my truck is far more crisp at 12.8 at idle. 🤪
now I’m curious. I wanna take the br7ef out of my nitrou truck and out tr6s in and compare
and another guy said above not to run 14/1 with a big cam as it is too rich... and my truck is far more crisp at 12.8 at idle. 🤪
