cast vs. hypereutectic pistons - Hot Rod Forum : Hotrodders Bulletin Board -- 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 01-16-2003, 03:31 AM
New Member
Join Date: Jan 2003
Location: VA.
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post cast vs. hypereutectic pistons

I,m on a budget and wondering if I,ll be safe using cast pistons in my small block chevy buildup? I,ll be at around 350 H.P. and 380 Tq.and probably never see above 5500 RPM. Building a cruiser rather than a race car. Would it better to use the hypereutectics? I see the cast pistons advertised as "budget" which gives the impression of "cheap". Did,nt auto manufacturers use them for years and still use them? Thanks.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 01-16-2003, 03:56 AM
DoubleVision's Avatar
Not Considered a Senior Member
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 41
Posts: 10,675
Wiki Edits: 0

Thanks: 15
Thanked 65 Times in 60 Posts

cast pistons would survive in your case, but on the flip side of things, most after market pistons are 20 shorter on the compression height, which really defeats the purpose. a stock 350 piston has a compression height of 1.560, most aftermarket cast ones are 1.540, which kills quench and hurts compression. so i`d go with the hypers, Speed pro offers hyper pistons at a excellant price and the ring gaps don`t have to be widened. i am unsure of there compression height being i`m yet to find anywhere online that offers them, PAW offers them, so you could maybe call them and get the details, if you do, let me know.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-16-2003, 06:27 AM
TurboS10's Avatar Moderator
Last wiki edit: Auto Terms and Definitions Used in Modern Engine T... Last photo:
Join Date: Sep 2002
Location: Texas
Age: 38
Posts: 3,463
Wiki Edits: 2

Thanks: 0
Thanked 0 Times in 0 Posts

The cast should be fine. I am unaware of the height differance, but I would definately research it. You might get a qaulity set of cast pistons like TRW with the oem compression height. I would give summit a call.

Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-16-2003, 01:47 PM
mustang66maniac's Avatar
Ford Freak
Last photo:
Join Date: Feb 2002
Location: Rockville, MD
Age: 31
Posts: 676
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts

In my engine rebuilding book it says cast pistons will work with n/a engines up to 1hp per cubic inch and 6200rpm. Hypereutectics are for engines with more than 1hp per cubic inch, but still can only be reved to 6200rpm.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-18-2003, 04:25 AM
woodz428's Avatar
Troll Hunter
Last photo:
Join Date: Sep 2002
Location: Philo,Il
Posts: 2,701
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts

the difference in pin height is a common practice, it allows for block and or head machining with out bumping compression up in a normal stock type rebuild. When I was running a machine shop, chevy heads usually needed resurfacing/milling to make them flat again, so if you are doing that or decking the block it probably won't have much effect on quench or compression.
Reply With Quote Quick reply to this message

Recent Engine posts with photos
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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

All times are GMT -6. The time now is 05:07 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright 1999 - 2012. All Rights Reserved.