new plugs: +1 or +2 ranges cooler?

[BlackVert]

i need new spark plugs, and i still have some pinging at part throttle when the engine is completely warmed up and the intake air is 230 degrees.

i currently have ASF32C-F4 plugs, which are 1 heat range cooler than stock.

should i go another range cooler? might that help the pinging a little?

anyone know off the top of their heads what the +2 ranges cooler plugs would be?

 

[94-302-vert]

I can tell you that I use autolite 24s in my NA car (1 range cooler).. so maybe autolite 23's?

 

[BlackVert]

yeah, i just got autolite 23s over lunchtime. thanks

 

[FORCED2DV8]

I run 23's with spray, and they work excellent, Ypou may want to doubl check your timing.. And where you get fuel from, diff, stations gas is not the same even if it says 89 or 91 octane, I usually stick with BP or amoco, and Shell is usually good also.

 

[KBCobra95]

I run the 23's and no pinging at all!

 

[BlackVert]

I run the 23's and no pinging at all!

good news

do you have a way to datalog your intake air temps? just wondering if you see temps in the 230+ range after driving for a while like i do ...

 

[KBCobra95]

posted in other thread.