Zz383 - Team Camaro Tech
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post #1 of 9 (permalink) Old Jul 9th, 05, 06:30 AM Thread Starter
Marty Griffith
Join Date: Jul 2005
Location: Canton, GA
Posts: 6

I am very, very close to getting a replacement motor for my new 68 Camaro RS, which I want to be of the non LS carbureted variety. In a previous project I had a bad experience with a Beck Racing 406 crate motor. They (Beck) told me that with all the options I chose (AFR aluminum heads, air gap manifold, etc) that the motor should put out 450+ hp. The motor sounded good but for the money it was a turd power wise. I'll bet it wasn't even 375hp. Now that it is time for another crate motor purchase, I am a little hesitant about the power claims. I would like to go with a small block for the benefits (weight/exhaust clearance) but I want big block power (400-450hp). This is why I am leaning towards the ZZ383. But, I know that I can get a BB crate motor and the power WILL be there. Does anyone here have any real experience with this ZZ383. Has anyone actually dyno'd their ZZ383 to confirm the output. It all sounds good but I do not want to get another small block to later find out that for just a little more I could have had a big block with no questions in regards to power.

Any input is appreciated.

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post #2 of 9 (permalink) Old Jul 9th, 05, 07:35 AM
Senior Tech
Join Date: Sep 1998
Location: Highland Village, TX
Posts: 177
Re: Zz383


I've seen a couple of ZZ383's on a chassis dyno. From what I remember they were in the 300-310 RWHP range (~390-400 HP at the flywheel). Both probably had a little more in them power/ET wise with some different supporting components and tuning.....if that were the ultimate goal.

In a well sorted chassis on sticky rubber (that hooks) that is enough power to go LOW 12's to high 11's at 3300-3500 lbs. Likely mid-high 12's in a typical street/strip rig of the same weight.

That being said, I think you could make considerably more power working with a local QUALITY machine shop and carefully selecting components. Could likely do it cheaper to boot. My old mismatched 10.3:1 383 made ~390 RWHP and ran mid-low 11's @ 3600 lbs with a converter that was about 1500 RPM too tight. (Tore up a trans and sent the converter in for repair and had it restalled for the below engine)

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post #3 of 9 (permalink) Old Jul 10th, 05, 05:32 AM
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Location: Murfreesboro, TN
Posts: 1,273
Re: Zz383

I tend to agree with DragRacer. Using a reputable machinist that will work with you on the best parts to use, from both a power and economy standpoint, is preferrable to buying an off the shelf motor that someone has designed that might not be good for your use. As stated, it would probably be less expensive as well.
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post #4 of 9 (permalink) Old Jul 11th, 05, 08:52 AM
Join Date: Jul 2005
Posts: 11
Re: Zz383

We had a ZZ383 on the engine dyno. We are using one as a test mule for manifold testing.


Those numbers are on a DTS engine dyno with an electric water pump and 750 double pumper.

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post #5 of 9 (permalink) Old Jul 13th, 05, 07:01 PM
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Location: lees summit mo
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Re: Zz383

i love my stroker from The Engine Factory. engine factory.com

68 SS350 4spd.
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post #6 of 9 (permalink) Old Jul 19th, 05, 11:27 AM
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Location: Brainerd,Minnesota
Posts: 146
Re: Zz383

My ZZ4 pulled 420 on the dyno with the Hot Cam kit and an RPM Perf manifold with a VS 750 Holley.

Jeff Supinski
'69 SS - Hugger orange, white stripes, Ivory interior. ZZ4,M-20,3.42's
'07 GMC Sierra Crew Cab
'79 L-48 Corvette
'06 Goldwing
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post #7 of 9 (permalink) Old Jul 20th, 05, 06:02 PM
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Posts: 236
Re: Zz383

I bought a crate engine from American Speed in Moline, IL. 3 years ago for my 1968 Z28. The crate engine was the replacement for my fresh 302 MO that I don't want to damage. I called Gail Trent at American Speed and we discussed the options and he recommended a 355 SB and guaranteed me 440 hp. I went with his expertice and the engine showed up with the dyno sheet indicating 446 hp. American Speed specialize in low compression pump gas friendly engines. Big bonus is the owner Gail Trent, excellent man to deal with. Check out their web site. www.amerspeed.com

1966 L72 2 door post Biscayne bench seat M21 4.10, 16K miles
1968 Z28 RS cowl plenum M21 3.73, fresh 302MO stored 450hp 355/Tremec TKO
1970 SS350 Nova daily driver bench seat M21 replaced with a Tremec TKO
1949 Meteor Pro Street 468/4L80E
1955 Chevy Gasser BBC M22 410's
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post #8 of 9 (permalink) Old Jan 5th, 06, 07:51 AM
Join Date: Jan 2006
Location: FLA
Posts: 1
Re: Zz383

I Just Got Registered Here. I Recently Converted My 1988iroc-z 5.7l Tpi To A Zz383 With The Holley Stealth Ram. I Got A Beefed Up 700r4 And Corvette Converter. With A Fair Tune On It Right Out Of The Box, I'm At 318 Rwhp/370rwt With Old Regular Gas In The Tank. We Figure With Clean Premium Gas, I'll Be Over 320/375. Maybe That Helps Ease The Pain.
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post #9 of 9 (permalink) Old Jan 7th, 06, 04:16 PM
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Join Date: Sep 2002
Location: Concord, CA USA
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Thumbs up Re: Zz383

It's funny, I ordered my zz383 at nearly the exact same time these posts originated, but don't recall seeing these at the time.

I got the zz383 from Sallee Chevrolet in Oregon. I deviated slightly from the menu and went with 10:1 AFR heads with the rev kit. Otherwise, it's just like they build 'em.

I love the engine, it has gobs of power, and guys with big blocks say it pulls as hard as theirs if not harder. I haven't dyno'd it yet, but have a connection that will trade a day at the dyno for a reload of the OS on his PC. Probably sometime this spring. Will post results when I have them.

'68 Camaro RS... zz383 in 2005 and still runnin' strong!
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