I've heard alot of people running 383's say that their 383 idles very tame with large 350 cams like the cc306. I'm just about finished building my 383 and this has me alittle irked. I have a cc306 sitting in it now. It's actually a HT383 crate motor, (3.8" stroke,4.00" bore), approx 11.3 to 1 compression. I suppose the increased streetability is due to vacuum/stroke more than anything. What have you guys noticed? I was dissapointed with the hotcam and a little dissapointed with the 224/230 (tame idle but good driveability, excellent mileage).

I was considering stepping up to the XE 236/242 or GM 847. Anybody have any experiences with these in a 383? I've seen a few solid roller 242/248 cams floating around, and this is my toy, but dont wanna go to big. Keep in mind I currently run a TPI setup (MAF)/LT1 intake and heads (ported), and longtubes. Shooting for mid/upper range torque and HP, 6500 RPM max.

Heads are now ported LT1 (sent to lloyd), converted for gen 1 SBC. Will be replaced later by ported AFR 210's. Suggestions/input would be great.

Oh yeah, is there any interchangability between hydraulic roller and solid roller cams? Never thought about it, but can you use hydraulic stuff on a solid roller cam or vice versa? Just wondering...Normally I would keep part types together, but I like knowing my limit of interchangability. Didn't seem worth it to start a new thread, for fear of flaming, kinda like the gen I LT1 thingy

 

I'm runnning a 234/240@050 with 576/596 @1.6 lift cam with 114 LSA in my 396. It idles well at 925RPM but not 850...


I haven't played with timing much at idle to try and make it smoother as the 925 works well so far.

Cubes eat up big cam specs so you should be fine with either one of those you listed.
Mike

 

The longer stroke will swallow a cc306. Its not a bad cam.

I'm running an XE 230/236 but if I had to do it again I would have gone with a custom grind matched to my heads. Maybe something like the one mtxpert is using.

 

I am running a 240/250 with 557 lift on a 112 LSA HYD cam On my 383. Compression is 12.5 /1. Car has to idle at 1,200 rpms to be happy. Car would be very streetable if it didn't have the TH400 and 4:30 gears.