Polishing Rotors - Pros and Cons

NoDOHC · 03-01-2009, 11:47 PM

Right now I am in the act of freshening up an 88 4-port engine for in my '86.
I have seen many people polish the rotors before installing them, I decided to do the same.

The reasoning that I used is that it will decrease carbon buildup, improve heat rejection of the rotor and decrease exposed surface area which should minimize fuel precipitation and improve knock resistance.

My question here is whether the rotor requires some irregularities for improved turbulance as the air exchanges past the point between the leading and trailing plugs (right before it ignites the charge). Will polishing the rotor sacrifice startability and low-end toque by eliminating an important fuel mixing mechanism?

Maybe this question has yet to be researched. I only brought it up because I can't decide myself if it will improve flow or harm it.

I went ahead and polished the rotors, so I can only hope there are no negative side effects.

03-01-2009, 11:47 PM	#1
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	Polishing Rotors - Pros and Cons Right now I am in the act of freshening up an 88 4-port engine for in my '86. I have seen many people polish the rotors before installing them, I decided to do the same. The reasoning that I used is that it will decrease carbon buildup, improve heat rejection of the rotor and decrease exposed surface area which should minimize fuel precipitation and improve knock resistance. My question here is whether the rotor requires some irregularities for improved turbulance as the air exchanges past the point between the leading and trailing plugs (right before it ignites the charge). Will polishing the rotor sacrifice startability and low-end toque by eliminating an important fuel mixing mechanism? Maybe this question has yet to be researched. I only brought it up because I can't decide myself if it will improve flow or harm it. I went ahead and polished the rotors, so I can only hope there are no negative side effects. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)