Multiple engine ?'s HELP - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-28-2010, 11:40 PM
Registered User
 
Join Date: Nov 2009
Location: Orange County, CA
Posts: 56
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Multiple engine ?'s HELP

ok so i need help identifying some pistons they're in a zz4 350 (4in. bore,1-piece seal), they are marked 321-00-16c ?

another, is boring .60 over on the same zz4 block ok on something that will rev to about 6500 and hopefully 550hp?

and last can a external balance setup be changed to internal balance?

Thanks Guys, as much info as possible will help.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-29-2010, 08:29 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
That is a tall order for a streetable NA engine, IMO.

I'd probably use a solid roller cam, a lot of compression- using FT pistons and small chamber Dart or Brodix heads, at the very least a 750 CFM carb but 800-850 not out of the question, an intake to match all this- like a Victor, a hella-strong bottom end, stout valve train, etc.

This will take some real coin to do right, and if it was me, I wouldn't do it w/an OEM 4-bolt block in the first place.

Now, I expect to hear others say that an aftermarket block isn't needed @ 550 HP/6500 RPM. And that's fine- but I'd much rather spend the extra money on a good foundation than throw away a big chunk of change if/when the bottom end lets go and takes my forged reciprocating assembly w/it. And some will say a cast reciprocating assembly is fine, too. And maybe it is- it's just not what I would do, is all.

Now, depending on what it is that you hope to accomplish, there may well be other avenues to explore- like a bigger displacement (383 for instance) and a correspondingly milder camshaft to get you a ton of torque lower down than some high-winding 350.

An external balanced engine can usually be made into an internal balanced engine by using heavy metal (aka "Mallory" metal) to balance the reciprocating assembly.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-29-2010, 08:36 AM
Member
 
Last photo:
Join Date: Aug 2005
Location: Virginia
Posts: 875
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by cobalt327
An external balanced engine can usually be made into an internal balanced engine by using heavy metal (aka "Mallory" metal) to balance the reciprocating assembly.
And it ain't cheap
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-29-2010, 10:46 AM
my87Z's Avatar
Veteran/Firefighter-EMT-I CRT
 
Join Date: Mar 2009
Location: maryland
Age: 31
Posts: 1,685
Wiki Edits: 0

Thanks: 6
Thanked 11 Times in 11 Posts
Quote:
Originally Posted by 65malibuSS
ok so i need help identifying some pistons they're in a zz4 350 (4in. bore,1-piece seal), they are marked 321-00-16c ?

another, is boring .60 over on the same zz4 block ok on something that will rev to about 6500 and hopefully 550hp?

and last can a external balance setup be changed to internal balance?

Thanks Guys, as much info as possible will help.


why would you want to bore to 4.060 when if you need to bore it at all the most you would probably need to do it would be to 4.030. i'm not sure if you fall in this catagory but you see this alot where people want to bore the cylinders out the maximum they can to get extra power, and the truth is that just boring a SBC's cylinders out will barely give you a recordable power increase, you will need to stroke the engine as well if you want to see a power increase due to inceased cylinder volume (this is not always true with a BBC as you can bore them out far more than you can bore out a SBC)

and i agree with cobalt here that trying to make 550hp out of a ZZ4 short block would be risky, but i'm sure some have done it, but IMHO it would not be something i would be willing to try with my money, 450ish would be alot easier to obtain and more realistic for the given parts and it only being a 350. to get a 350 to make 550hp you will be hard pressed to do it with only turning 6500, 550 could be the peak at 6500 but then you will still need to go atleast another 500rpm before you shifted it to keep the power band up fromshift to shift, so you would be turning this engine 7000 (that is NA) forced induction and nitrous is a whole different story
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-29-2010, 02:15 PM
Registered User
 
Join Date: Nov 2009
Location: Orange County, CA
Posts: 56
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the answers guys! I agree and have made some new decisions...
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
the history of chevy v8's savman1 Hotrodders' Lounge 43 03-02-2012 07:57 PM
Build for Hp or Torque? Venturat Engine 76 09-23-2008 11:22 AM
1985 C-6 truck tranny, no engine braking effect fast68 Transmission - Rearend 40 02-04-2008 06:55 PM
engine ?'s heavychevy70 Engine 4 02-01-2005 09:21 AM
67 Mustang Engine Stat ?'s 3-OnTheFloor Engine 2 12-20-2004 07:32 PM


All times are GMT -6. The time now is 06:01 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.