I have a set of 118 Aluminum Corvette heads -1.94 1.50 58cc

Set of 416 305 heads - 1.84"/1.5" valves, 58cc chambers

Can get:
Vortec heads - 1.94 1.50 64cc


I want to make some decent power without breaking the bank. Almost sounds impossible.
Here is my combo lined up as of now.

355 Roller w/ L98 Cam. 750 CFM Edelbrock Carb, Performer RPM, 1.6 RRs, MSD 6-AL w/ MSD 8556 distributor and Blaster 2 coil.

Hooker 2055's, 3" exhaust from header back.

24-2600 Stall TC Transgo Shiftkit and vette servo

I would like to run an LT4 hotcam or ZZ4 cam.

My goal is somewhere in the 12's.



The problem I am having chosing my heads is because I do not know for sure which pistons are in the block. The previous owner mentioned that the pistions were reduced compression due to the 58 cc heads. So by moving up to vortec heads I would lose compression ratio.

I borescoped the pistons as much as I could the only stamp I saw was 0.30 and we know what that means, but tells me squat on what kind of pistons.


I want the 12's :P

 

Sorry didn't mean to post in engine swap section... I meant the Engine Tech

 

Well if you put the vortecs on the car you could probly put a steel shim gasked on there and keep the compression near what it is now. Then you would run into lift problems if you put a big cam in it. I think you should deffinitly get rid of that l98 cam. I dont know much about the lt4 cam but the zz4 cam with good heads should get you into the 12s.

 

Vortecs by a landslide.

 

The upgrade roller Vortec head kit from sdpc2000.com with .575"-lift-capable heads, RPM Airgap intake, rockers, bolts & gaskets runs about $1100 plus shipping. If you run the Hotcam, I'm sure they'd throw in 1.6 rockers if you asked.

If you don't already have a "standard" RPM intake, what you'd spend to get either the aluminum or 416 heads ready to go would put you pretty much around the $1100 mark. And, what you'd end up spending net on the Vortec kit would be reduced by what you got for selling the other two sets of heads.

You can't know what to get to control CR until you know the piston crown type you've got and how far they are down in the hole. The best way to determine that is with the heads off. More than likely you can get a good CR with proper quench by proper head gasket selection (not sure exactly what they use for the sdpc Vortec kit - probably something in the .035" thick range).

 

vortecs with an oh-so-much bigger cam.

 

I have heard some great stuff about the vortec heads and high compression or pretty decent boost.