ZZ4 short block vs. Std 350 4bolt -? - Team Camaro Tech
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post #1 of 9 (permalink) Old Feb 2nd, 07, 12:11 PM Thread Starter
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Strick
 
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ZZ4 short block vs. Std 350 4bolt -?

My question is this: Is the zz4 short block worth the extra $1000 (which includes NV state tax - we have a Summit here), or just go with a standard 350? Is there really that much hp to be derived from those pistons and a forged crank?

http://store.summitracing.com/partde...3&autoview=sku

Versus

http://store.summitracing.com/partde...1&autoview=sku

I plan on using Edlebrock's RPM Performer head and cam kit.


Thanks for all replies.

Strick
'67 'Vert (408" SBC), V-Rod, Street Glide, and too many other motorcycles to list.
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post #2 of 9 (permalink) Old Feb 2nd, 07, 01:54 PM
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Re: ZZ4 short block vs. Std 350 4bolt -?

The ZZ4 shortblock is a nice package with roller cam. There is no HP in a forged crank - just reliability for higher RPM. There is no reason you can't make as much or more power with any 350 but the ZZ4 is good parts with roller cam and all balanced and warrantied. In longblock form, the ZZ4 is somewhat limited in power output by the L98 style heads but is still a nice package for a street car.
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post #3 of 9 (permalink) Old Feb 3rd, 07, 09:16 AM Thread Starter
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Re: ZZ4 short block vs. Std 350 4bolt -?

Thanks 67funcar!

There has to be more comments - someone?

Strick
'67 'Vert (408" SBC), V-Rod, Street Glide, and too many other motorcycles to list.
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post #4 of 9 (permalink) Old Feb 3rd, 07, 09:31 AM
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Al
 
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Re: ZZ4 short block vs. Std 350 4bolt -?

The ZZ4 shortblock is a nice package, but I wish they'd use forged pistons. Some will also argue that the lighter weight casting is more prone to cracking, and limited as far as overboring is concerned.

The factory roller cam system is definitely slick, and if you plan on using a roller cam, you will gain some of that $1000 back, as retro roller setups are definitely spendy.

The one piece rear main seal is also a plus in my opinion. The drawback is that if the seal ever does fail, the transmission has to come out in order to replace it.

The warranty part is nice, but I've heard that GM isn't the easiest to deal with on those issues. Also, I believe the warranty period begins on the date of purchase, and if you don't plan on immediate install, the warranty could actually be expired before you crank the motor. Check on that though, as I'm not positive.

The other GM shortblock you linked to has -18cc dished pistons? I'd steer clear of that. You'd be hard pressed to make any compression even with a small chamber head. Perhaps it's a typo.


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post #5 of 9 (permalink) Old Feb 5th, 07, 12:46 PM
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Re: ZZ4 short block vs. Std 350 4bolt -?

http://paceperformance.com/index.asp...&ProdID=184534

1967 rs conv. hugger orange, 350 engine, former turbo 350 tranny-now SUPER T-10!!

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1969 blue SS 'vert, 350 engine, 4 spd

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post #6 of 9 (permalink) Old Feb 5th, 07, 01:51 PM
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Re: ZZ4 short block vs. Std 350 4bolt -?

for the a little more than the price of the ZZ4 shortblock, you can piece together a complete running 355 with better parts using a late model roller cam block if that's what you want.

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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post #7 of 9 (permalink) Old Feb 7th, 07, 05:07 AM
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Re: ZZ4 short block vs. Std 350 4bolt -?

I took a 627 tbi block put a used zz4 crank from a 383 swap(cheap) , powdered metal rods , trw 2256 .030 forged pistons and had this balanced . Added comp XR288hr hydralic roller , gm fastburn heads ans air gap vortec with 650 speed demon and zz4 hei with msd module . It made 350 on the chassis dyno . I have about $2800 in it.
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post #8 of 9 (permalink) Old Feb 7th, 07, 08:17 AM Thread Starter
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Re: ZZ4 short block vs. Std 350 4bolt -?

I am going with the crate ZZ383 (right now). After much reading and the link about about the 350 shortblock with its' low compression. I think $ for $ the crate motor just makes sense.

Strick
'67 'Vert (408" SBC), V-Rod, Street Glide, and too many other motorcycles to list.
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post #9 of 9 (permalink) Old Feb 9th, 07, 01:36 PM
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Re: ZZ4 short block vs. Std 350 4bolt -?

ZZ4 shortblock is the base for the 350cid 430hp/430lbs-ft ZZ430 they built in 1998.

No Camaro for now
72 Chevelle unbored 350/honest 400hp vortec heads. 700R4, 4:10s

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