Another spark plug??
02-29-2012, 10:10 AM
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Another spark plug?? Have a 418ci ls3/l92, t/s l92 heads,etc. My car has been tuned with the stock plugs tr6. I put the BR7efs in and made some pulls on the dyno and lost some power N/A and on the 150 shot. Lost about 15hp and about 20ish tq n/a. I put the BR7 in so we could try the 250 shot out but never tryed it. Will it need to be retuned for that spark plug. What plug can i run so that i don't have to change plugs between the 150/250 shot??
02-29-2012, 10:18 AM
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no you will not need to be retuned for the plug change, i would get that 7 out of there and run at least an 8, i would run a 9 but thats me......you should not loose that much power maybe 5 at the most per heat range colder.
you should be fine with the 8 in there for both hits, whats the compression?
you should be fine with the 8 in there for both hits, whats the compression?
02-29-2012, 11:24 AM
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Same dyno. It usually makes 670rwhp,782rwtq on the 150. That day it only made 640ish/hp. Had good bottle pressure. With the stock plug on the 150 it would pull all the way to 7000. For some reason it was sputtering about 5000+ with the br7.
02-29-2012, 11:53 AM
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You can only compare numbers if they are back to back pulls. In another words make a pull, change plugs and make a pull again..
What is the compression of your motor?
The Br7 is to hot of a plug for a 250 shot...
You need to put the plug you plan to run in the head and N/A tune on that plug..
Dave
What is the compression of your motor?
The Br7 is to hot of a plug for a 250 shot...
You need to put the plug you plan to run in the head and N/A tune on that plug..
Dave
02-29-2012, 12:12 PM
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Gap was @ 34-35. Compression is 11:6:1. We was short on time when we was there, they was closing so i did not get to change plugs and make anymore pulls. So what plug should i run and i will get the motor retuned..
