As posted in the proven engine build big block section:
I ran across this article in a Car Craft magazine about a 383 Mopar build-up. It's really bolt ons and a cam. Made some good power. Seemed like the kind of info a lot of folks would be interested in. Maybe a pretty common build. Here are the details:
Bone stock 383--stock-bore
K-B hypereutectic replacement pistons--9.0 to 1 compression Pump gas special.
Unmodified 906 heads
Comp XE285 HL Cam 285/297* gross duration or 241/247* @ 0.050
The lift is 0.581 intake and exhaust with 1.6:1 rockers---hydraulic lifters
Mopar Performance M-1 intake
Demon 750 cfm carb
1 7/8 headers
This combo produced the following Horsepower and Torque
Horsepower peak is 455.7 @ 5800 rpm
Torque peak is 457.4 @ 4900 rpm
This research was done by Comp Cams and the entire story can be found in the Winter 2003 Car Craft Mag
...................Oldschool
Here's what me and a friend of mine were wondering for a street only driver, mostly cruising car. The car will be a '72 B body, and my friend has bought a 383, but it has not been touched as far as checking casting #'s other than knowing it's a 383. We have not even checked the year yet...
Anyway, I was looking at this build, and was wondering what would happen if you did change a few things. First before I continue, I will say there's gonna be a lot of "assuming this and assuming that" because of the lack of unfortnate knowledge of the motor. But we can use this as a general guideline...
-383 block, + .030
-Stick with the KB pistons, somewhere around a 9-9.5:1 comp.
-Hopefully it will have 906 heads, but if so then this is what I have in mind, gasket match both int/exh ports, bowl port
also, install bronze valve guides, and hardened seats, have 2.14/1.81 valves here are the two sets of
valves that I'm concidering: These are Summit Racing part #'s
Intake: MIL-45275-8 Exhuast: MIL-45266-8
valve springs will be matched to the cam
-I've been looking at the Lunati Voodoo cam's and have a few good things and a couple of not so good things.... But
more good than bad, if these will make better vacuum then I'd rather focus on this line up, we were thinking
of maybe something like this: LUN-60302
-The intake will probably be an Edelbrock Performer RPM
-Use the same carb, but it's got to have an electric choke
-Use the same headers with a 3" collector and maybe 3" pipes all the way back with X pipe and maybe Hooker
Aerochamber mufflers
-Will be using an electronic ignition conversion
-Aluminum water pump housing with high flow aluminum water pump with a 180*F thermostat
-March Performance serpentine belt conversion kit
-Run an electric fan assembly with one of these:
http://store.summitracing.com/partdetail.asp?autofilter=1&part=FLX%2D31165&N=700+4294924500+4294839058+4294860934+115&autoview=sku just in case the link doesn't work here's the part # FLX-31165
So anyone got any comments?