383 F/I CAM specs

[QC97Z]

Hey all-

I had another thread about an S/C cam, but it seemed to sort of stray away from the topic. I've gotten a bit closer with cam selection, and need to get something picked out pretty soon. Comp has a couple of off-the-shelf grinds, but neither one is really close to what's been suggested to me.

I've been suggested to look at a 224/236 cam with .565/.565 lift on 114 LSA.
Comp has a 210/224 .576/.570 113 LSA and a 230/236 .570/.565 113 LSA.
Lloyd Elliot suggested like a 210/220 with a pretty small lift (can't remember exactly).
AI suggested like a 236/242 or something crazy on duration.
Thoughts on duration? Lift seems to be a pretty good number at around .560-.580. Thoughts on 113 vs. 114 LSA?

Motor is a forged 383 with -31cc pistons. The heads are AFR 210's (LT4) competition ported with harland-sharp 1.6 roller rockers. The heads start to plateau between .550 and .600 lift, so i figured about a .570 is a good lift number. They can take up to a .700 lift, but with F/I (8-12 PSI on a Procharger F1A) I don't really see the need to push the valvetrain too much. Thanks-
-Brett-

[Fastbird]

How much power do you want to make, how much boost do you want to run??? Answer me that, and I'll make a recommendation.

[QC97Z]

I'm planning on starting at about 8psi, probably will only ever see 12psi MAX. I'm thinking on 8 psi (with a decent cam and tune) I should put down high 500's. Goal is to be at about 650 on 10 psi.

[QC97Z]

You there Fastbird? lol

[1963SS]

My hydraulic engine is a 383 and I made 412 RWHP with a cam similar to the one that AI recommended. Compression was 11.4. The cam is a Comp XFI 280. 230/236 and .576/.570 on a 113 LSA. The idle is great (good lope, nothing crazy) and I drove the car to St. Louis, 1200 mile round trip and got 21 MPG with 3 people, 12 quarts of moonshine, and a bunch of luggage in my 1995 Impala. The bad part is that the springs that Comp recommended were the newest peened beehives and , I think that the aggressive lobe profiles killed the springs. They kept getting louder and louder and after a 6000 mile teardown the spring tension was just about the same as a ballpoint pen. The Patriot gold springs cured the problem and it's all better. I normally shift at 62-6400 RPM and the cam holds in there just fine. I can't imagine a custom spec'd cam being much better and this is a proven profile.

As always, IMHO. Whatever you choose be ready to have fun and the 383 will put a permagrin on your face.:drool: