OK...I currently have a CC502 (218/224 at 0.050", 0.561"/0.570" with 1.7 rockers) in my 383 that I was thinking about selling. The engine is being rebuilt soon...it will be a 385 when it's all said and done. I also bought a custom cam to replace the CC502 (this thing is huge).

I was talking to my friend last night and found out that he's selling his heads...very, very nicely ported LT1 heads with 2.02/1.60 valves, 5 angle valve job, and a ported intake to match. I'm thinking about buying these since I was planning on having a stock set ported and adding bigger valves...this guy's price is probably going to be right at what I was going to spend in the first place.

After tossing some ideas around last night, I was thinking about buying the heads, keeping the CC502 and my 1.7 rockers, and seeing how it does. I ran the numbers earlier...static compression will be at 10.32:1 and dynamic will be at 8.40:1. The CC502 in my 383 with stock heads (valve job only) made 329RWHP and 382RWTQ. Anyone have any thoughts on how it should perform with these heads, or am I just nuts for even trying it?

Side note: I guess flow numbers for the heads would help. I don't have any numbers for anything under 0.500"...I'll have to get with him and post those up later.

EXHAUST---INTAKE
500-193------500-275
550-202------550-287
600-207------600-290
650-210------650-287

 

Those flow numbers look suspiciously like LT4 headflow numbers...don't ask me how I know.

 

They're LT1 heads...I was there last year when they were ported by LT1Dave. They have around 60-70 hours worth of port work and welding in them (not counting the hours spent on porting and welding the intake) and he'll never do another set like them, which is part of the reason why I'm planning on buying them.

 

Why would you spend all the money on a 385 and these heads, but choke it off with a cam made for stock displacement stock headed cars? Definatly get a bigger cam for it, a custom grind matched for you heads/engine if possible. 329rwhp out of a 383 is just sad in my opinion, you definatly need to let that thing breath.

 

Yes ill attest to these heads looking like frankenstein they have so much welding done to them.

 

stupid question here.
what do welded intake, and welded heads mean.

 

different parts of the peices are welded so they can later on manipulate the air passages to get greater flow (ex. a runner is welded so it can be opened up bigger, sounds odd at first)

 

I believe material is added (via welding) so the porting can go beyond the parameters of what the heads can be ported in stock form. This type of thing is not cheap, so you don't see it too often in these circles. Higher end racing types see it all the time, I suppose.

I've seen where it's added on an intake, but no clue on heads.

 

The other cam that is sitting there is a 242/248 0.575"/0.600" (with 1.6 rockers). I'm just worried that it's going to be a little too "***** to the wall" with the big one, so I was thinking about leaving the CC502 in there to tame it a bit.

 

I'm running a HR cam slightly larger than that in my 383

 

What is the LSA & ICL on the BIG cam as you call it?

 

The smaller cam probably would'nt be the right choice with that many cubes and a decent set of heads. BUT I have to admit, I'd like to see how that puppy would run with the smaller cam before you switched to the monster cam. Anybody else curious? Or am I nuts too?

 

Big inches--smallish head's= big cam to make the heads work and let it breathe at 6500RPM's.His other cam ain't got a chance of doing that.

 

114 LSA, 110 ICL. Comp cut the cam...the lobes are 3317 for the intake and 3318 for the exhaust.

The other problem that I didn't mention earlier is that a 4L60E has to live behind this thing for about a year until I get some money together for a T56. The 4L60E has been upgraded as much as possible (upgraded servos, valve body, clutches, band, pump, vacuum modulated), but we're doubting it's going to last very long if I run the large cam. I guess my other option would be to run the small one for a year, then swap to the large one when I get the T56.

 

I wouldn't want to use that cam... at least not with that LSA. I'd sell it and go to a custom grind once you're serious about putting the thing together.

-Mindgame