30thanniversaryz

I'm debating between the cc503, cc306, and gm847 for my 383. It's a m6 with 3.23s right now, planning to upgrade to 3.73s soon. The whole bottom end is built (eagle 4340 and forged pistons) and I plan to spray at least a 150 shot. The car will mainly be a weekend toy with some track time, so I care mainly about driveability and overall the best performer.

Geneticallybroke

iTrader: (3)

from those three the gm847 with 4.11 gears

StealthFormula

iTrader: (35)

If it were me I'd up the gears to a 4.10 and run the 306 or 847. I'd check out going custom too but with a 383 the cc503 would be nice for being a comfortable driver and such but IMO a little too small.

LM97Z

iTrader: (4)

Call Lloyd Elliott & get a custom grind.

30thanniversaryz

I was thinking 4.10s but I wouldn't want to have slicks to get traction. How is the 847 for driveabiltiy? It doesn't have to be necessarily comfortable, just reasonably tolerable.

StealthFormula

iTrader: (35)

The more gear you give that cam the better drivability it will have. With 4.10's and a 383 I would imagine the car to drive just fine with that cam.

blackz93

iTrader: (2)

847 ftw!!!

reaper97

I like the GM-847 the drivability is decent...No complaints here.. You'll love this cam or if not than get a custom grind from either Ai or Lloyd

bombebomb

Between them, not the 503, to small for a 383 IMO.

str8-6

iTrader: (1)

i have the 847 in my 350ci m6 and stock gearing and drove it daily for almost a year. i love that cam and its still kind of small for a 383 though.

Ray@Nitrous Outlet

bigger isn't always better....have a friend that ran 11.1 @ 119-120 with a 503 in a 383 with LT1 castings.

I went 11.3 @ 119 with a 222/228 .544/.538

Matts94Z28

iTrader: (6)

Call Advanced Induction and get one of their off the shelf grinds... If you do decide to go with the 306 then let me know, I will sell you mine, It has about 8k miles on it. I want to go with an AI cam myself.