jrz126

I've been working on building and installing a 383 into my monte carlo SS the past few weeks. I just got it running last night.
MVI_0652.flv

MVI_0653.flv

It sounds friggen awsome with just the headers.



I think I'm gonna be making close to 450 HP with it. I just have to finish the exhaust and break it in, then I can take it for a cruise.

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Jeff Zimmerman
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To the pessimist, the glass is half empty.
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HiTech

Is that a 350cid punched out to 383? 'Cause the 383 I'm familiar with is the old Chrysler motor. How'd you come up with a speculated 450hp too? Is the cam a hi-lift/duration one? Sort of sounds like it from the video-- but then with open headers it's a bit tricky to tell.

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jrz126

Yeah, Its a 350 block bored 0.030 over with a crank from a 400. The 400 crank has a longer stroke which gives me about 27 extra cid and the bore gives me the other 6.

It does have a pretty radical cam in it. I bought it off the mechanic that did the block work for me. He originally used it in a motor for a late model circle track car. I dont remember the specs on it though.

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Jeff Zimmerman
To the optimist, the glass is half full.
To the pessimist, the glass is half empty.
To the engineer, the glass is twice as big as it needs to be.

gerty

If it's an automatic, I hope you have a high stall torque convertor behind that motor.
It does sound good.

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gerty

HiTech

Did the crank journals need to be ground as a result of a different crank? I never messed with the small blocks so I know little about them. My bag was the big block motors... (I had a 427 Chevy 425hp). Since the engine runs obviously, the cylinder bore depth must be plenty long to accomodate the 400 crank's specs.

What about the heads? Any mods done to them? Rollers? Ported? Shaved? While you had the motor out on the stand, did you have it balanced ?.. that makes for its longevity. And speaking of longevity, change the oil to Mobile 1 or Royal Purple during break-in period instead of using dino-oil. Just a suggestion.

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3v0

I may be a bit out of date on this. I recall the engine should be broken in then switched to synthetic oil.

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blueroomelectronics

I don't know much about car engines but I know when something looks great. It's a real beauty, shame to hide it in a car.

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The Mad Electrician

Beautiful, what are you setting the redline at?

also if you want to upgrade to a computer controlled engine check out the mega squirt system!!

MEGA SQUIRT!!

I want one of these soo bad!!

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rjvh

Nice engine

Where is the car???

Robert-Jan

bryan1

G'day Jeff,
Man that looks like a cool motor but there's only 1 thing missing and thats a root's blower, and I agree where the pic of the car it's going in ???.

If you find you don't have a use for that motor I could find a good home for it as oneday I plan on building a hill climb buggy and that motor looks the goods for it

Cheers Bryan

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HiTech

Well the jury is still out on the issue... although some of today's motor mfgrs. have been shipping motors with synthetic in them. I too have heard of break-in period using standard grade oil and then switching to synthetic, but I think it may be more of an economic/cost factor since it's much better to perform numerous oil changes during the break-in period... especially with performance motors. I'd be changing oil every thousand miles at first. But never pour in "engine flush" fluid during break-in!

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jrz126

Here's the car.


The crank journals did need to be ground down, but all that was done before I bought it. The block was also clearanced a bit in spots for the rods. I did have the mechanic that bored the block balance everything too.

I have a 2500 RPM stall converter in there. I'm also getting a fresh 8.5" 3.73 posi real soon. I doubt my 7.5" open unit will last very long. My friend and I were joking that the first burnout I do with it should be in the street with the car pointed up his driveway so we dont have to push it very far to get it back in the garage when it breaks.

These monte carlos are real popular for late-model race cars. So if I want to get sick of the car I'll just slap a roll cage in it and take it to the local speedway.

I've got most of the build pics here:
jrz126_86ss - Photobucket - Video and Image Hosting

__________________
Jeff Zimmerman
To the optimist, the glass is half full.
To the pessimist, the glass is half empty.
To the engineer, the glass is twice as big as it needs to be.

hotrodhed120

Hey guys! My 2 cents: Synthetic is so good at what it does it does not allow proper break-in. Go with standard oil for the break-in period (3,000-5,000 miles) then switch to synthetic. OEMs usually have a lot closer tolerances than your local machine shop.

hotrodhed120

Very nice! What kind of carb is that?

Optikon

Your WIP is banging. :-)

Looks good! How heavy are you? Have you gotten it dyno'd?