Indy/RHS Heads

Yes they flowed better than expected, and the problem is that if the exh. side flows more than the intake side then the overlap of the cam at low lifts will pull the intake charge out the exh, creating a lean condition. Now if it was going on a NOS engine then I would fully port the exh. side as the engine would be getting force induction and the NOS would like the higher flowing exh. ports. The heads were 77% total as seen in the pictures but the low lifts were 93-96 % which is very high for low lifts, and thats why I left the exh. side alone.