THRILLSEEKER

How much N/A reliable horseys can you build out of one, and roughly how much $$ would it take to build one from scratch? (all new parts)

JohnJan

I just finished a 383 from scratch for my '68 Camaro. All top shelf stuff with hyd. roller, iron eagle heads, and Holley Stealth Ram FI. With machining it was nearly $10k. Almost $3k of that was the FI setup. Haven't dyno'd it but estimates are in the range of 425-450hp.

I wish I could afford two more for my 28SS!

cdscarab

You might take a look at the Summit catalog, they sell GMs 383 crate motor for ~$4300, last time I looked. It has a 4340 crank, PM rods, vortec heads, hydralic roller cam (112LSA), 4 bolt mains, makes 330hp, +400 ft/lbs of torque. Increasing power to ~400hp can be achieved by swapping in GMs hotter cam part# 24502586 (112LSA) and cam kit. May not be perfect, but for ~$5000 it wouldn't be bad.

jaroot

and NOW GM has the ZZ383... check er out...

otherwise... if you did all of the work yourself and used GOOD components you'd be in the 5 - 7K range dependng upon what you used...

depending upon what exhaust you are gonna run and how high you want to spin em is gonna determine what you can make for power... in marine trim with some longer exhaust tubes 450 hp is gonna roughly be about the plateau without getting too wild and keepig things around 5500 rpm for a WOT rpm... maybe a few hundred rpm higher.

actually if i was gonna spend the money to put a new sbc together i'd bite the bullet and start thinking 427 + CID from the mouse... 525/ 525 in N/A form is NOT difficult to achieve while keeping it relatively tame

check out www.shafiroff.com just for ****s and giggles...

Iggy

GM Performance Parts build the ZZ383 with 425 hp @ 5400 rpm and 449 Ft.Lbs torque @ 4500 rpm.
Price from Pace Performance is....4869.95
Installed cam is perfect for marine use too.

http://www.paceparts.com/index.asp?P...D&ProdID=73193

Biggus has a friend that installed two of these in a boat. Last report was they were doing great.
Biggus, you out there???

rchevelle71

iTrader: (1)

I have been thinking about putting this in my next boat, I would have to ditch the Aluminum heads though, or install closed cooling.

baronmarine

i build a 383 about 12 years ago, ultra tech did all the machine work and i put it together. 420 hp huge power took it apart 6 yrs ago to freshen up and it looked perfect just put bearings & rings in it still runs great. you'll love them. pushs a old 2800lbs 19' donzi style boat i have to
77mph with a surface drive.

Biggus

iTrader: (1)

Last month I helped a buddy install a pair of ZZ383's in his 26'Sutphen. He had a set of CMI's and Holley 750's and Air-Gap intakes. They work incredible, picked up 10 mph of the stock 260's

So far he's logged close to 30 hrs with zero isssues.

Formula78

http://www.offshoreonly.com/forums/s...ad.php?t=87856

dirtyplumber

you are going to build 383's,dont be silly go with 400 small blocks it's like a 305 to a 350