Critique my First Engine Build

[yody]

the second cam you mentioned would be more suited to the motor if you can get the compression up some, 10.1 would be perfect for a decent street motor with alm heads, even 10.75-1 is easily doable, but since you didn't mention HP goals 10-1 would perfect for the street, and teh second cam you mentioned with it. A lot of people design motors and say what they are going to be doing later, you should really make some decisions, if its going be awhile off before the charger I would put a cam with less split duration and less LSA, and change the cam out when you go with the supercharger/injection.

[Blown353]

I was going to say bigger on the cam too. My cam is 242/254 @ .050, .540/.580, 114 LSA. Max lift will vary based on what your valvesprings can take, but I would go more duration, especially on the exhaust side, than what you have listed. A very well respected centrifugal supercharged engine builder helped me spec my cam, and the combo works EXTREMELY well.

Definately try for the 210 spec heads. The exhaust port on the 195's is OK but I'd like to see more exhaust flow down the road when you add the supercharger. The more exhaust port flow you can have, the better! (but don't forget the intake too, better intake ports mean you can make the same power with a larger supercharger pulley, meaning lower intake temps.) Honestly, even on the 210 spec heads I'd like to see better flow numbers on the exhaust port at .200 and .300 lift; while not bad they could certainly be better. A good rule with heads for blown engines is shoot for as high of an I/E ratio as you can.

Yody has a good point. If you're not going to add the S/C for a while then put a different cam in it that will run better naturally aspirated and change it again when you're ready for the supercharger.

Something else you didn't mention, but definately have the pistons ceramic coated on the top, and I'd dry moly cote the skirts while I was at it. Also don't forget a little bit wider ring gap since you're planning to add boost.

Troy