Thread: 385 fast burn crate engine 350ci

Tweet

hello everyone like this new home i found. i baught a 350ci crate engine a while back about in year 2002.

gm p/n 12496769 ZZ4 create engine
hp......................385@5600 rpm
torque.................385@4000 rpm
max.rec.rpm..........5800 rpm
compression ratio....9.6:1
block...................p/n 10105123 four bolt main,cast iron 1 piece rear main?
crankshaft...........p/n 12556307 strong forged steel
connecting rods.....p/n10108688 pm rods forged powder metal connecting rod
pistons.................p/n 10159436 high silicon aliminuim with offset pins
piston rings............p/n 12528817
camshaft................p/n 10185071 hydraulic roller
crank durration at lash point (degrees) I:275 E:280
crankshaft durration @0.50 tappet lift (degrees) I:208 E:221
maximum lift with 1.5:1 rocker ratio I:474 E:510
valve lash zero
lobe centerlines (degreese) 112
intake manifold ........p/n 12366573 aluminum dual plane , no egr
cylinder heads .........p/n 12464298 aluminum fast burn heads 23 degrees
( heads have been removed and port and polished )
intake valves ...........p/n 12555331 2.0 hollow stem lightweight
exhaust valves..........p/n 12551313 1.55 sodium filled lightweight
valve springs.............p/n 12551483 single spring
outside diameter 1.32"
pressure at installed height 101# @ 1.78"
solid height 1.22"
average rate pounds per inch 332
rocker arms ...............p/n 10089648 steel 1.5
valve lash ..................0 zero
spark plugs .................mr43lts gap .045
fuel ...........................92 octane i was running reg unleaded
timing ........................32 degrees @4000 rpm with vacum advance
disconnected
if i add hot cam...p/n 12480002 hydrolic roller = its said to produce 425hp dont know about torque ?
(degrees) crankshaft durration at lash point I:278 E:287
crankshaft durration at .050" tappet lift I:218 E:228
maximum lift with "1.6 rocker" I:525 E525
valve lash zero
lobe centerlines (degrees) 112


I had it in a 1987 montecarlo ss. I ran the motor only about a week or so when i
baught it. For several reasons got side tract did other things married etc. .
Yanked the motor out after beating my wifes causin on a 80 modle mustang and he had a stroker etc. . Sounded loud took him about two car lanes on the street ,since then yanked the engine out and sat in guarage for a long time. In that time frame had tooken the heads off and sent to get machined port and polished by hand i asume. My firts son was born then everything was put on hold and the mc i had was starting to be a rust bucket, so i even got more dissapointed and kind of gave up a little. This year i just happened to run into a young kid selling his uncles car on auto trader. The car wasnt what it looked like in the ads but the body was clean so i baught it, now im craving for a beast under the hood.
Ive read a couple of post here before i posted this and a great post on adjusting the rockers before installing the engine that was a great post.There were several methods to use. My question to the pros out here.
How much more hp can i achieve with a good cam? I have had the heads port and polished. I also have the required fuel pump and carb ( required from gm) headers etc.. I want a chopy sound so that it can sound like whats under the hood hp wise. I want my car sound like the gone in 60 seconds shelby, its exaclty what im looking for. The sound and the performance etc. lol. What cam would yall recomend. what hp will it produce. GM offers the hot cam i mentioned above giving me 425hp without touching the bottom end.
This engine will be backed up with a 6spd tranny and i believe a 456 gear need to double check.

Well gave yall as much information as i could,except carb and fuel pump ill dig those up in the garuage.
I dont want a 9 sec car etc. I want a daily driver with a chopy cam sound,oh and one more thing im thinking of putting an x pipe exhaust. I had true dual exhaust on before. Will the x pipe give me more of a shopy sound etc... ???????? i have so many ???? to ask the pros im a rookie at this, thanks in advance to everyone reading this far and anyone that helps in replys


p.s hope this is better understanding (i road the short bus)