I recieved my 93 sc heads today. after getting a port and polish job along with decking, cleaning and a chevy valvetrain including 1.94intake and 1.55exhaust valves. the intake flowed 230cfm at .400lift and something crazy like 290cfm at .700 lift. I told him I'd have to see it to believe it. he said "I'm just letting you know the numbers I got, I'm not making this up". I asked for a printed copy so I can post up on here to see if you guys think its legit.
other than the high flow numbers, the only other issue I have with the heads are the valve guides. He didn't touch the guides after installing them. what I mean by this is that he didn't grind the extra 3/8" off the bottom of the guide, its still sticking out into the bowl. he said he left it like that for flow purposes. it creates turbulance which helps mix the fuel and air, if he were to grind that down flush with the roof it would allow the air/fuel charge to ram into the back of the bowl which would create a fuel puddling effect, so its actually better to leave the guides the way they are.
What do you guys think about this theory? should I have the valve guides ground down or leave them the way they are?
other than the high flow numbers, the only other issue I have with the heads are the valve guides. He didn't touch the guides after installing them. what I mean by this is that he didn't grind the extra 3/8" off the bottom of the guide, its still sticking out into the bowl. he said he left it like that for flow purposes. it creates turbulance which helps mix the fuel and air, if he were to grind that down flush with the roof it would allow the air/fuel charge to ram into the back of the bowl which would create a fuel puddling effect, so its actually better to leave the guides the way they are.
What do you guys think about this theory? should I have the valve guides ground down or leave them the way they are?