E85 and Spark Plugs
02-19-2011, 12:28 AM
#1
E85 and Spark Plugs I posted this in another section with not alot of response...but, I am going to be making the switch to E85 and I am wondering what plugs you boosted guys are running with E85. I am currently running TR6's at about 550 rwhp on gas and I am hoping to be around the mid 700 number on high boost. Just wondering what people are running and what type of power level. I would figure on gas I would be around a TR7 or 8 with 750 rwhp. Also, projected or non projected tip. Thanks!!
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02-20-2011, 07:19 PM
#11
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I don't see why people are scared to run a colder plug... On a boosted car you aren't losing/gaining any real power by going from a 6 to 7 or even an 8 with the proper gap/
02-20-2011, 07:30 PM
#12
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I'm running a -9 non projection tip plug with E85/E98 (960 rwhp the last time on the dyno w/ E98). No issues on the street with plug fouling/cold starts on E85.
02-21-2011, 08:00 AM
#16
Here is another insightful view.
"I found this to be true in engines that have too lean of A/F mix, In some cases where the proper modifications were not done.
A lean A/F mix, could tend to lead into pre-ignition as it does not have enough fuel to control the combustion temps....often resulting in a loss of power as well.
With proper A/F mix and plug combination the engine maintains a relativly consistant combustion temprature, and Pre-ignition does not exist.
Add the fuel mix needed and a cold plug could actually allow the fuel to extinguish itself before complete combustion is completed, resulting in loss of power.
I believe that in a properly tuned A/F mix, An engine with a hotter plug will be required to maintiain the heat of the chamber to completely burn the A/F mix.....thus producing more torque and power.
And dont be afraid to give it some ignition timing...
Mark Sullens,
www.marksullense85carburetors.com "
Thread here: http://www.yellowbullet.com/forum/sh...d.php?t=306139
"I found this to be true in engines that have too lean of A/F mix, In some cases where the proper modifications were not done.
A lean A/F mix, could tend to lead into pre-ignition as it does not have enough fuel to control the combustion temps....often resulting in a loss of power as well.
With proper A/F mix and plug combination the engine maintains a relativly consistant combustion temprature, and Pre-ignition does not exist.
Add the fuel mix needed and a cold plug could actually allow the fuel to extinguish itself before complete combustion is completed, resulting in loss of power.
I believe that in a properly tuned A/F mix, An engine with a hotter plug will be required to maintiain the heat of the chamber to completely burn the A/F mix.....thus producing more torque and power.
And dont be afraid to give it some ignition timing...
Mark Sullens,
www.marksullense85carburetors.com "
Thread here: http://www.yellowbullet.com/forum/sh...d.php?t=306139
02-21-2011, 09:55 AM
#17
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It has been proven over and over again, that running a colder results in ZERO power loss. Back to back dyno pulls have been done with swapping plugs with ZERO power loss. Why risk it?
