[wakesupremo]

Thanks for the replys. Sorry steve25 but I was certain that was what I bought. Its a high rise single plain that was for fuel injection but i made plugs and filled the injector holes!!!!

[Gach]

If you dyno it with a 1050, and he said you needed a colder plug, then went with colder plug then change to a 850. You probably dropped a good 30 hp and now that colder plug may need a hotter plug. Because it changes the air to fuel ratio. Only way to really tell is to make a run, shut it off and pull plugs and see what they look like. If you can take a picture of the plug I can tell you right away if it to cold can also tell if its got enough timing. I’m curious why did you take the 1050 off and put 850 on.

[RH152]

Running on dyno then at track can use different tuning
I personally have picked up et switching from 850 to 1050.you need to make a full bore run and look at plugs

[Gach]

Originally Posted by RH152

Running on dyno then at track can use different tuning
I personally have picked up et switching from 850 to 1050.you need to make a full bore run and look at plugs

Exactly