I'm about to send my 4 bolt 350 off to the engine shop and pour a buttload of money into it. When it comes to engine combinations it makes me feel like i'm in alebra 2 again Here's what I'm looking at so far, if you have any suggestions please post them. Thats why I'm asking you guys, I'm a rookie when it comes to building engines.

I'm looking into a forged 383, I've always heard good things about 383's and I plan on spraying eventually. I priced an eagle rotating assembly. It's a balanced, forged kit. H beam rods, forged 4340 crank, with -7.00cc. dome pistons.

I already have a lunati bracket master II cam in the 350. I had planned to reuse it. Its a hydraulic flat tappet, 292/292 duration, .480/.480 lift. I was told that was the biggest I could go with stock pistons. It's power rated for 2000-6000rpm. I'm guessing I can go bigger with the new pistons?

Also, I'm looking at a set of AFR heads, from what I've read the 195cc's and the 210cc's are about what I should be looking at for a 383. What do you guys suggest?

 

Id got with the afr 195's i have heard nothing but good things about them and they are awesome on 383's,is this gonna be a street driven car?

 

on my circle track motors..i put all forged rotating assembly's (I've had Eagle, Callies, Scat, rods and cranks with SRP Forged pistons) and you can go with a bigger cam than that...mines a solid lift @.50 260/266 dur, adv dur 290/300 .558/.549 lift with a 106 lsa..its a 4/7 swap cam made by comp...the heads i got are Pro Action heads that were 50cc combustion chambers but they have been milled,,they flow 220cc on the intake..i have a single plane high rise intake with an 800cfm carb with msd ignition..i pull them to 7500 rpm all the time

 

Well from your sig i'm getting this is going to be a sat night cruiser/drag car. That being the case i'd go with a larger cam ~ 242/248 @.050 duration (or more) and a 108-110lsa considering your gearing and stall. And with that i'd get the larger 210cc AFR heads. You don't need to worry about low end tq loss of the bigger head with a 3200 stall. And if you are going to drop the coin on some good heads why go small when you will regret it when you go more inches/bigger cam later. Everyone always steps it up eventually.

 

yeah, its gonna be driven on the street a good bit but not everyday, I'm not worried about fuel mileage. I do want a big cam with a good lope but I don't want to overdo it. I've heard a lot about the 4&7 swap cam, I'll keep it in mind when I purchase a new one.

I was questioning the compression ratio for the kit I mentioned above, because it didn't say it on the summit site. I checked in the magazine and found a similar kit. It was 11.8:1 with 3.750 stroke/6.000 rod length, and -5cc flat pistons (instead of -7cc dome pistons). So would the -7cc's be a higher compression? I know this means high octane gas but I don't want to have to keep a drum of sunoco in my garage. How much is too much compression for a street/strip (mostly strip) car? Keep in mind I'm gonna spray some.

 

The -7cc is funny to be called a dome piston. They make reverse dome pistons which means the dish is the shape and size of the combustion chamber and are better for chamber swirl efficiency. If they are -7cc in volume then yes that will drop your compression to the mid to low 11's which is ok for 93 octane, big cam, and a good efficient comb chambered aluminum head like most all aftermarket heads have now a days.
A flat tappet cam with a tight LSA like has been mentioned above paired with 11+:1 comp will make a good combo and will pound the ground

 

i was told my 50cc heads with a flat top piston is about a 12.8-13.0 to 1 compression ratio

 

ok guys here's what i've come up with. Tell me what you think.

-4 bolt 350 milled for 383 kit
-4340 forged eagle crank with 3.75" stroke
- .30 over forged aluminum eagle pistons with -5cc flat tops
-forged steel 4340 H beam rods 5.7"
-internally balanced
-11.8:1 compression
-VIC jr intake
-Lunati voodoo cam 241 intake/249exhaust dur@.50" 525/546 lift 2,500-6,600rpm

Not sure on this, It's just a suggestion. I checked on the 4-7 swap but all the ones i found make power from 4000 up. I don't know if I want to rev the thing to 7 grand, or maybe that would be better, hell i don't know.

-Afr 210cc aluminum heads, 76cc combustion chambers,

And of course ARP bolts and studs for the heads
for the rest of the drivetrain I was thinkin along the lines of 3200 stall, th350, and either 3.73s or 4.10s (possibly a th400 but I already have the th350)

 

man u must of builded a few motors in u'r pass most people u talk to don't know both efi and carb

 

Well, I don't hunt, fish, golf, or do any other activities that guys do. I play with hotrods and drink beer but not necessarily in that order. I've had a wrench in my hand since I was 8 and i'm 28 now. I worked full time, didn't go off to school and went to night school, and lived at home so I could spend all my time and money on my hotrods. Rarely dated either since women took time and valuable money away from the toys. Worked wholesale auto parts for 4 years while in school so I got exposed to efi there primarily. I just love fast toys.