I have been running on my 500hp tune on E85 and have been having some issue's, the car will sputer at low RPM's all this is below 4000rpm its like having no power then i stay on the gas and around 4000rpms it feels like it kicks over then drives fine. I was thinking that the fuel is not igniting so i gaped the plugs smaller to .30gap and still did it then i went even small .23 gap and still did it and then just for shits went bigger to .35 gap and worked for a bit then started again so i went down to .28gap and the car drove perfect for a day then started back up the next day and right away starts doing it again. I am running BKR7E's also i watch the AF gauge and it goes rich when it does it just for a couple seconds so that's why i was thinking its not igniting any help would be greatly appreciated.

 

turbo lag??

 

Why are you still running a 7 heat range plug? I would think you should be using at least an 8...

 

Ya i was thinking the same thing but not sure which plugs to get do you have any recommendations?

 

NGK BKR8EIX and they come pre tapped at .030.

 

K i just ordered up a set thanks man will give it a try and see what happens