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Old 12-15-2005, 05:25 PM
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ZZ4 Short Block Info

I have a lot of good extra parts and have been thinking about making my '40 chev coupe a resto-rod. I'm thinking about buying a ZZ4 short Block. I have a good set of Dart Heads, 2.02 - 1.60, 64 cc (early 90s vintage), Edelbrock Torker Manifold and Holly 3310, 750 carb. Would the ZZ4 work with all of this, and would it be a good combination. Do tell me to get the new heads, etc as I want to use the old parts, and if need be I just get an older 350 block and build that

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Old 12-15-2005, 05:42 PM
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ZZ4 heads have 58 cc's ...yours are larger so less compression

The ZZ4 cam is somewhat mild ....your intake and 3310 carb are better suited to a HIGHER RPM than what the ZZ4 cam is.

Lower compression and not enough camshaft and a carb that flows a good bit ......you be the judge......
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Old 12-15-2005, 07:11 PM
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Maybe shave the heads some and get a better cam - maybe like the LT-1 cam I now have in the Corvette?
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Old 12-15-2005, 07:34 PM
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If you are talking about the 95-97 LT1 Camaro-Corvette cam #12551705 it is actually milder than what comes in the ZZ4.

LT1 #12551705 duration I:201, E:208 @.050 lift, Max lift I:.447", E:.459"

ZZ4 #10185071 duration I:208, E:221 @.050 lift, Max lift I:.474", E:.510"

Earlier Corvette LT1's (70-71) used cam #3972178 which was a mechanical flat tappet cam

A ZZ4 shortblock is a good building point from which to start, that has a bunch of really good heavy duty parts, but must be combined with the proper 58CC head to realize it's potential.

For Deuce: Your ZZ430, does it have the "hot cam" #24502586?

Vince

Last edited by 302/Z28; 12-15-2005 at 07:39 PM.
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Old 12-15-2005, 07:50 PM
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Sorry, I meant the 70-71 LT-1 Mechanical Lifter cam
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Old 12-15-2005, 07:58 PM
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Quote:
Originally Posted by GCD1962
Sorry, I meant the 70-71 LT-1 Mechanical Lifter cam
You certainly could run that cam in the ZZ4 shortblock, it is still availiable from GM Performance Parts.

#3972178 duration @.050" I:242 E:254 max lift I:.425" E:.455"

That is if you want to continually adjust lifters. It was fun when I was younger, but now a days I go all hydaulic.

Vince
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Old 12-15-2005, 08:27 PM
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will the ZZ4 or LT1 roller cams work in stock vortec 5.7 motors with untouched vortec heads ?











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Old 12-15-2005, 09:41 PM
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Quote:
Originally Posted by Mustangsaly
will the ZZ4 or LT1 roller cams work in stock vortec 5.7 motors with untouched vortec heads ?
Mustangsaly
Yes.

Vince
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Old 12-15-2005, 10:27 PM
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Quote:
Originally Posted by 302/Z28
Yes.

Vince
what is the best performance cam ( I will replace the timing chain with cam too) I can put in this vortec with out any head machine work ? a cam with as much lift and performance as the stock vortecs will take with out any machine work with the stock GM valve springs ? I guess I'm Looking 4 the best bang 4 the buck.

i've bought a 117,000mi 5.7 vortec to install in a 63 Nova project. plan is to use the 98 vortec 5.7 to get the car going and recoporate from the car restoration / build financially speaking, till I can build my forged bottom end 383 with a nice set of alum performance heads. I want, to run the vortec for a yr to a 1 1/2 yr time frame, till I can get my 383 built outa done out of my early 70s SBC 350 4 bolt main block done. will this stock vortec take a 75 or 100 shot of nos at the track a 1/2 a dozen Xs a yr ? and I will have a set of Vortec Heads for my parts stash in the end.

I could get wild and rebuild the vortec, but don't plan too. I just want to run it for a yr or two and enjoy it, I don't think I will rebuild it, this will be a 17 teen yr olds 1st rod. (this will be a good starter motor for him to learn on at the local drag strip)I think he will be responsible as far as taking care of it, and using his head since he will be in on every nut and bolt, lets just say he will help on everything done. plus helping financially too.



My Complete Plan
I'm Starting to Build a pro street 63 Nova 2Dr HT. plan is to be a 5yr project (Ladder Bar Rear frame and a narrowed ford 9", Big Tubs, Roll Cage, 14.5"W or wider Rubber on the Rear, 3 1/2" front Wheels, 4 wheel disc ect. ) I will be running a stock 65 front clip (No Money in my budget for a MII Front End, I can Not see a MII in my future) (including stock front frame, 65 radiator support and 65 fenders, and prob a stock hood at 1st) this is a father son project that is Not going to be a Daily Driver. prob some warm summer nite cruising and some 1/4mi Drag Strip time, like 6 + Xs a yr at the strip. I have A nice 72 stock 4 bolt main SBC std. bore 350 & a built 350Th tranny, the motor I want to build outa the 1972 350cid 4 bolt main is a 383 stroker somewhere in the 425HP 450HP Range. but with this size project (plan is 5yrs to Finnish) I need time to build it and time to save the funds.




Mustangsaly
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Old 12-16-2005, 02:34 PM
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ttt for answers please, on cams for stock vortec 5.7 V8s with stock vortec heads & springs.
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Old 12-16-2005, 03:00 PM
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Quote:
Originally Posted by 302/Z28

For Deuce: Your ZZ430, does it have the "hot cam" #24502586?

Vince
Yes............but it is not that lumpy......more lift, less duration than a ZZZ camshaft.


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Old 12-16-2005, 07:09 PM
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what cam is best performance speaking ? that I can put in this 5.7 vortec with out any head machine work ? a cam with as much lift and performance as the stock vortecs heads will take with out any machine work with the stock GM valve springs ? LostI guess I'm Looking 4 the best bang 4 the buck.

thanks 4 helping





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Old 12-16-2005, 09:00 PM
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I would not put any of the cams that have been discussed with the stock valve springs. You should at least consider a cam and rev kit (keepers, retainers and springs) which ever cam you go with.

Vince
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Old 12-17-2005, 01:04 PM
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what cam would you recommend ? I'm all 4 new springs & keepers, retainers ect. but don't want to do any head machine work for springs ect. for a cam change on this setup for my planed use.


thanks







Mustangsaly
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Old 12-18-2005, 12:37 PM
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what cam would you recommend 4 a performance upgrade on a stock 5.7 vortec with carburetor & HEI ? a cam I won't have do any head machine work to for springs ect. I'm all 4 new springs & keepers, retainers ect. but don't want to do any head machine work for springs with more lift ect.












Mustangsaly
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