E85 spark plugs

[Trbobuick]

Hey all. What's the current go to street and race spark plug for a Champion headed engine running 28psi?

 

[GNVYUS 1]

NGK TR6 here with Champion GN1 heads, got this tip from Steve D on here. Depending on coils your gap might need to be tightened up.

 

[BEATAV8]

Aluminum heads (Champion / TA) NGK 5430 BCR8ES, Brisk DR12S (NGK8), Brisk DR10S (NGK9)

Iron heads DENSO 5333 ITF24 (NGK8) DENSO 5334 ITF27 (NGK9)

 

['87 Turbo "T"]

Ported irons here using Delco MR43T.

 

[Trbobuick]

Aluminum heads (Champion / TA) NGK 5430 BCR8ES, Brisk DR12S (NGK8), Brisk DR10S (NGK9)

Iron heads DENSO 5333 ITF24 (NGK8) DENSO 5334 ITF27 (NGK9)

Same plugs for street or strip?
GN1 aluminum heads. Why do you like the 5430 over the colder TR6?

 

[BEATAV8]

5430 is an NGK 8, it’s colder than a 6.
The 8 will work for both street & strip. It’s cold enough for high power and stays clean on the street with E85. Even a 9 will stay clean.

All of these are resistor style, non projected. For aluminum a gasketed plug is much preferred over a tapered seat as it’s easier on the threads. I use a drop of oil on the threads to lube them.

Ref:

https://www.ngk.com/heat-range-conversion-chart-2

 

[GNVYUS 1]

My badd, I didn't update my parts file, 5430 and got off ebay.

 

[Trbobuick]

.

 

[Trbobuick]

5430 is an NGK 8, it’s colder than a 6.
The 8 will work for both street & strip. It’s cold enough for high power and stays clean on the street with E85. Even a 9 will stay clean.

All of these are resistor style, non projected. For aluminum a gasketed plug is much preferred over a tapered seat as it’s easier on the threads. I use a drop of oil on the threads to lube them.

Ref:

https://www.ngk.com/heat-range-conversion-chart-2

Thank you

 

[dynoman]

Brisk !! The only plugs I use ...DR10

spark plug cross reference heat range chart

Spark Plug Cross Reference HEAT RANGE CHART Spark Plug Cross Reference - HEAT RANGE CHART - Brisk spark plugs_NGK spark plugs_Denso spark plugs_Bosch spark plugs_Champion spark plugs Autolite spark plug heat range is generally indicated by the last digit of the part number. Higher number...

briskusa.com

 

[GNVYUS 1]

Dynoman and Spool, there are some posts online about Brisk electrodes breaking off, what have you two seen or heard in real street/racing life?

They seem to be more susceptible than other plugs due to the silver electrode. They also appear to be the best conductor plug due to the same sliver so possible double edge sword.

 

[dynoman]

Zero problems with mine and they have seen a lot of high HP use . They are also very forgiving to daily driving and don't seem to foul from low speed driving & idling .