I have a 94 z and since Im a broke college student I have been buying my parts one by one and winter is getting close... so.... I have a cc503 cam, comp roller rockers, comp 918s... my question is, what should I do with my heads? I got to an automotive college and have the equipment to do everything free of charge! what should I increase my valve size to? and what limitations should I have for porting? also what lifters do you suggest I should get? btw the engine will be .030 with forged bottom end

 

IMHO if you dont know what you are doing with the port job save some money and get them done by someone that dose. Sounds like you are going to have a good setup though give Lloyd a call he can help you out.

 

If you spec the bottom end you should be good. But there is a bit of "magic" with porting heads that comes from experience. IMO, on a good build have a pro do it with a good reputation.

If you are still determined, you can clean up the casting flash, take a little from the short side radius, blend the bowls, and gasket match. I wouldn't go into heavy contouring or reshaping, just some light stuff. Don't take away too much because you still want good port velocity.

 

I hear at my school that the hi-po instructor is very good. He would guide me through it all, I was figuring that all I would do is a minor port job. What about valve size? how much bigger should I go?
Just tryin to save money, but also not f**k anything up too, you know?

 

You can go up to a 2.00 from the stock 1.94 intake valve size. A 2.02 requires more work on the valve seat than what it's worth. If you really trust the instructor, and they have good cutting tools, then try to upgrade the seat to a 2.02. However, you can get good flow still with a 2.00... 2 hundredths isn't much for the trouble.

 

Give Lloyd Elliot a call, since $ is an issue, you should be able to get his budget heads for cheap since you already have springs (and assemble them yourself).

 

You can go with the 2.00 and 1.56 valves and not have to change the seats. Anything bigger requires that you do. Do not touch the short side radius, as this is one of the easiest things to screw up. Do some searching. The one thing you could do is pocket port them for some nice gains and just clean up the flashing. Have them milled a small amout to make sure there flat and run a Impy gasket to help the compression. Don't forget a good valve job and check to make sure you run the right lenght pushrod.
Or as mentioned, just go with Lloyds econo heads.

 

ok, i called le and left a message (assuming hes not open for weekends) what do you guys have to say about lifters? what should i go with?

 

You have the instructor, machinery, and time. Get some books on porting from the library and ask questions when you don't understand. Go for it

 

yea i would at least do some of the work yourself. you have all the necessary tools and help. As long as you dont remove too much metal from certain areas you wont hurt yourself. Try to do a light port job and have someone else finish them. should save you some money and get a little experience.

 

You can get a set of brand new LS7 lifters from Scoggin Dickey for $109 Shipped. (not sure if they are an improvement, but they are the cheapest set of quality lifters I could find.)
You can also get the "Caddy" lifters from the CTS-V racing program for ~$235 shipped from there.

www.sdparts.com

 

the book thing sound like a good idea, ill run to the library tomorrow... as for the lifters I have considered the caddys but i was also told that I could just go with some new stock ones. Sound like a good idea or no?

 

I went with the stock replacements from Comp.

 

i think ill do the same