E85 and Spark Plugs
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!!
I still used TR6's @ 831 rwhp. This was on 93 and meth. Never any issues. They were gapped at .030
I think that TR7s are to cold on pump gas and E85 for the power level you are wanting.
I think that TR7s are to cold on pump gas and E85 for the power level you are wanting.
A 7 or 8 heat range plug is anything but too cold at 800 rwhp especially on E85. I would personally run a non-projected 8 heat range NGK or Autolite plug at that power level on E85 as it's fairly susceptible to pre-ignition.
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Verdad Gallardo I have tuned a few other cars in the upper 700 range that are running TR6 and no problems. I have a 2 in the 900's that are running 7's, one is on race gas and the other on meth.
Last edited by sho-me speed; Feb 20, 2011 at 06:55 PM.
Congrats, but just because you and several others have gotten away with it doesn't mean that there isn't a better and safer choice. A TR6 is not the wisest choice at that power level.
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/
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
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?
