Back4More

I have had great results with NGK BCPR6ES...Whats the timing @ ?
Info...8.0:1 CR with 6 PSI @ 32* timing. Also aluminum heads, no stat.

cabin fever

I've been running about 32-33 degrees of timing. Dist is locked.

10:1 compression 91 octane fuel, seems to be about the best I can get.

Back4More

Perfect...try those,$2.99 each.

cabin fever

thanks.
would those be the equivelant to the Bosch Platinums I am running now. the motor runs really good, and I don't wanna mess anything up.

Back4More

Its just a standard plug. Or if it runs good as is leave it.

endeavour32

iTrader: (4)

I'm curious if the the plugs I'm running are too hot. My engine is 10:1 CR with AFR heads, Crane Hi-6 box and PS-92 coil. AFR's website suggested to start with Autolight AR3935, which is what I've been running. This is their racing plug and the hottest plug in this series. Should I cool it down with a cooler plug?

cabin fever

This is probably a dumb Q,
but will I notice a loss in power with a cooler plug?

Griff

No loss of power with a cooler plug.

Is it the threaded section that is shorter on the R42TS's??? That is most likely because of the Merlin heads. You don't need that exact plug. Just something in the same heat range.

cabin fever

Griff,
I had R42t's not the R42ts's, maybe that was the difference.

The R42T was noticably shorter threaded area then the Bosch's.

Griff

The threaded area is the same length. Only the tip sticks out a little more.