10-12psi
Mixed 91/E85 flex fuel tune
10.4:1

I'm currently running some old TR6's I had laying around that I threw in without checking the gap. When I took them out recently to check them, they were at .045" as I think I had them in my vette at one point. I tightened the gap to .030" and the truck runs waaaaaaaaaay better. The tuner is recommending Denso IT24 but they are expensive and not readily available.

Anyone have any suggestions?

 

I run the BR7 at about a .024 gap with good luck.

 

I'm not sure where the line is on stepping to a 7 range plug, but the br6ef are a good plug. 6 range so I believe one step colder than stock, but have the non projected tip. I have a set laying around I have been meaning to put it my truck.

 

The line is when you read your plugs and a 6 is too hot. I run Br7ef's also, they have been reading just right in mine. 15psi 93+meth. Mine are gapped at .021-.022

 

Br7ef

Gapped .025-.026

 

George how much boost do you run? When I was gapped at .026 I had horrible issues with blowing out the spark. It was very bizarre...

 

Mine are at.028. No blow out up to 22 psi

 

Ive ran 28 on the ly6....play with dwell some it may fix your issue

 

I always assumed playing with dwell could fry a coil.

Maybe a blower is more picky about that than a turbo is. Also I was on Meth and 93, you guys tend to just run different fuel.

 

If you go to far you can but messing with dwell will help out and pick up power doing so

On one ford i did .025 was money another ford wanted .18 gap...same plugs both turbo same boost different fuels
1 had oem coils
1 had after market replacement coils


Also learned that too cold of IAT charge effects spark...when using meth and e85 you need some heat in cylinders