Pistons? - Page 3 - 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
  #31 (permalink)  
Old 02-16-2007, 09:08 PM
xntrik's Avatar
Save a horse, Ride a Cowboy.
 
Last photo:
Join Date: Jul 2005
Location: Arkansas
Posts: 5,131
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by hyarbour
I was thinking of going to a wide ratio 5 speed tranny to compensate for the 302's lack of low end and my 3.73 rear end should help, that and an offy cross-ram would diffinately be something nice to look at.
As for the pistons; I'll just get the right ones and some forged rods and proceed from there. I came across the pistons for $250-300, forged full floating type, still have to decide on what final compression ratio I want.
Thanks for everyones input
Howard

Howard,
If you are going to build a twister, you need lots of compression because of the long cam duration.

Watch out for pistons with more than .125 dome. The dome has a tendency to act like a fence and block the flame front of the combustion burn.
So deck height is important, squish/quench is important, and head cc's gives you your compression.

Yes you are going to need gear to get it going because the low rpm torque will be nil, but the power will also be peaky, so wide ratios might not be too good unless you spin it high before shifting. Calculate your rpm drop between shifts before you buy.
x

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #32 (permalink)  
Old 02-17-2007, 09:59 AM
King of my Man-cave.
 
Last photo:
Join Date: Nov 2003
Location: Michigan
Age: 55
Posts: 2,901
Wiki Edits: 0

Thanks: 4
Thanked 16 Times in 13 Posts
All this talk of using Ford pistons and oddball rods and such is just bench-racing BS. Make a small-journal 327 out of it. Find some 1.84/1.50 305 heads (depending on chamber size you will get between 9 and 10 to one compression.

tom
Reply With Quote Quick reply to this message
  #33 (permalink)  
Old 02-17-2007, 03:33 PM
junior stocker's Avatar
Registered User
 
Join Date: Feb 2004
Location: Everett, Washington
Age: 63
Posts: 821
Wiki Edits: 0

Thanks: 0
Thanked 10 Times in 9 Posts
See; what Machine Shop Tom said ,and what I said in my last post. I still think there's creativity left in this hobby and we all need to step out of the box once in a while. That's what HOTRODDING's about. BUTCH.
Reply With Quote Quick reply to this message
  #34 (permalink)  
Old 02-18-2007, 07:54 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,334
Wiki Edits: 326

Thanks: 844
Thanked 1,163 Times in 959 Posts
This was still buggin' me about the 327 pistons until I searched out a thread from 2002. It seems that Chevy built a 264 Gen II small block for the '94-'96 Caprice. The motor had a 3" stroke and 5.94" rods. Maybe the guy hyarbour got the motor from was trying to make a hermorphrodite 302 using 327 pistons and the 264 rods. If the block was 9.025" and the pistons were rebuilder types with a fairly short compression height, it could have worked out pretty close on the piston deck height. Depending on how much the piston popped out of the deck, a guy could run a little thicker head gasket to set the squish at 0.035".

Sorry Tom, more bench racing BS.
Reply With Quote Quick reply to this message
  #35 (permalink)  
Old 02-18-2007, 09:42 PM
junior stocker's Avatar
Registered User
 
Join Date: Feb 2004
Location: Everett, Washington
Age: 63
Posts: 821
Wiki Edits: 0

Thanks: 0
Thanked 10 Times in 9 Posts
TechInspector1, The problem with the 5.94 rods would be the journal size;265-283-302 small journal crank and 327 small journal block, and spacers are only made for the mains if I'm correct. I still think based on his own discription of "hodge-podge" parts and mismatched heads the "327" piston was down in the hole. He never addressed that issue however; and, he seems pretty dedicated to the idea of building a 301/302. Can Howard come out and play? BUTCH.
Reply With Quote Quick reply to this message
  #36 (permalink)  
Old 02-18-2007, 09:54 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,334
Wiki Edits: 326

Thanks: 844
Thanked 1,163 Times in 959 Posts
Quote:
Originally Posted by junior stocker
TechInspector1, The problem with the 5.94 rods would be the journal size;265-283-302 small journal crank and 327 small journal block, and spacers are only made for the mains if I'm correct. I still think based on his own discription of "hodge-podge" parts and mismatched heads the "327" piston was down in the hole. He never addressed that issue however; and, he seems pretty dedicated to the idea of building a 301/302. Can Howard come out and play? BUTCH.
You're right Butch. I'm just trying to make sense of it and neglected to take the rod journal diameter into consideration. Thanks.
Reply With Quote Quick reply to this message
  #37 (permalink)  
Old 02-18-2007, 11:54 PM
Member
 
Last photo:
Join Date: Jan 2005
Location:
Posts: 3,706
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
I've got a 3.1" large journal crank in storage waiting for a rainy day. It's out of a 262 or 267 I believe. It'll fit in a 400 block with spacers or the thick bearings and there are pistons available to work with a 6.125 rod. But I'm sure the rpm capability is low considering it's a cast crank. Sure would make for an odd combination though... I wonder what it would run like
Reply With Quote Quick reply to this message
  #38 (permalink)  
Old 02-20-2007, 12:31 PM
Registered User
 
Last photo:
Join Date: Dec 2006
Location: Northeast Kansas
Posts: 113
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
re: Pistons?

Yes Junior Stocker; the pistons were farther down the hole than I would have expected, I was even considering using a 6" rod.
I'm just going to try and build up the short block to the Z-28 specs, use the 64cc heads I got with roller arms/cam and get an Offenhauser cross-ram. I don't really want to go over a 10:1 ratio because of gas prices for high octane.
As for using Ford parts in a Chevy; I think my truck would gag, not to mention the cost of all the machining involved. Come on guys, I think mixing Chevy and Ford parts could be a felony in Detroit.
Reply With Quote Quick reply to this message
  #39 (permalink)  
Old 02-20-2007, 04:00 PM
King of my Man-cave.
 
Last photo:
Join Date: Nov 2003
Location: Michigan
Age: 55
Posts: 2,901
Wiki Edits: 0

Thanks: 4
Thanked 16 Times in 13 Posts
Quote:
Originally Posted by techinspector1
This was still buggin' me about the 327 pistons until I searched out a thread from 2002. It seems that Chevy built a 264 Gen II small block for the '94-'96 Caprice. The motor had a 3" stroke and 5.94" rods. Maybe the guy hyarbour got the motor from was trying to make a hermorphrodite 302 using 327 pistons and the 264 rods. If the block was 9.025" and the pistons were rebuilder types with a fairly short compression height, it could have worked out pretty close on the piston deck height. Depending on how much the piston popped out of the deck, a guy could run a little thicker head gasket to set the squish at 0.035".

Sorry Tom, more bench racing BS.
No problem. You just have to separate the BS from the Shinola. Bench racing is fun until somebody's trick idea costs twice as much as the real deal should.

tom
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
Help with pistons sotxpanrider Engine 4 04-30-2005 01:29 PM
? about dome piston's bowtieorbust Engine 5 09-19-2004 08:34 AM
Long skirt SBC pistons fierosum Engine 9 01-16-2004 08:02 AM
Forged Rods and Pistons for Ford 302? Mustang 69 Chile Engine 6 10-21-2002 07:39 PM


All times are GMT -6. The time now is 08:52 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.