Welding pistons - 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 07-09-2011, 05:00 PM
Augusto's Avatar
From the middle of the world
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Mar 2006
Location: Ecuador, South America
Age: 51
Posts: 1,312
Wiki Edits: 6

Thanks: 4
Thanked 2 Times in 2 Posts
Welding pistons

There are several engines here for which there are no high performance parts, like some Fiats, Toyotas, Datsuns, etc.

Most have dished pistons, and since we here are at 6.600 feet of altitude a little more compression would make them come alive.

I was thinking of TIG (heliarc) welding the dishes to build up material and raise the compression ratio of them.

Also I have tought of welding up the combustion chambers, some are of cast iron so a nickel rod would be needed for them, The aluminun heads can be TIG welded easily.

BTW... how about doing the same to the SBC heads?

Any toughts..?? old timers must have done something like this in the early hot-rodding years I'm sure.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-09-2011, 05:27 PM
jonahb's Avatar
Registered User
 
Last photo:
Join Date: May 2009
Location: St. George, NB
Age: 27
Posts: 119
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
I have welded cast pullies off rock crushers successfully with lots of

uniform preheat (500 degrees) checked in multiple places with a laser and

the wax markers and post heat in an oven while slowly decreasing or use fire

resistant blankets. I use Lincoln 99 Ni stick electrodes (smaw) because

it can be machined. I would suspect that cylinder heads would be similar but

I would consult someone who has done this before or have a set of junk

heads and trial and error.


I would be very very cautious welding aluminum pistons because there can

be brittle and soft spots unless you can heat treat them somehow. I think

milling the heads would be easier than welding the combustion chambers and

pistons.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-09-2011, 05:33 PM
Augusto's Avatar
From the middle of the world
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Mar 2006
Location: Ecuador, South America
Age: 51
Posts: 1,312
Wiki Edits: 6

Thanks: 4
Thanked 2 Times in 2 Posts
thanks for the input, about milling the heads, it don't always work, for example in a 60's Land Rover 4 cylinder engine you'll need to mill about 0.250 to get a 8.5:1 CR, imposible to do.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-09-2011, 05:38 PM
Augusto's Avatar
From the middle of the world
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Mar 2006
Location: Ecuador, South America
Age: 51
Posts: 1,312
Wiki Edits: 6

Thanks: 4
Thanked 2 Times in 2 Posts
no problem with the weldings I have like 30 years of experience in welding.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-09-2011, 05:57 PM
Registered User
 
Join Date: Jun 2011
Location: illinois
Posts: 195
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have one answer for you....................SUPERCHARGER!

No, make that two...................TURBO!!!!!!!!!!

Last edited by cleanspeed1; 07-09-2011 at 06:03 PM.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-09-2011, 06:01 PM
Member
 
Join Date: Aug 2003
Location: California
Posts: 903
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Augusto,

Pistons are cast units so there will be other elements in the mixture.
They can be welded BUT the heat will cause them to not be round. And the pin bosses might become misaligned. Also the top ring groove will be distorted. Lastly how will you get all the pistons to weigh the same and have the same amount of dome?
I think there is a lot to consider other than welding pistons.

I think I would put a turbo-charger or a super-charger on the engine rather than try to do the compression things.

Just my thoughts.

Scholman
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-09-2011, 06:05 PM
Registered User
 
Last photo:
Join Date: Jul 2004
Location: At Speed
Age: 51
Posts: 1,340
Wiki Edits: 0

Thanks: 2
Thanked 27 Times in 27 Posts
Cant weld cast pistons

Billet pistons can be welded. Drag racers do it often. Durability for everyday use may be a problem.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-09-2011, 06:08 PM
jonahb's Avatar
Registered User
 
Last photo:
Join Date: May 2009
Location: St. George, NB
Age: 27
Posts: 119
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Quote:
Originally Posted by scholman
Augusto,

Pistons are cast units so there will be other elements in the mixture.
They can be welded BUT the heat will cause them to not be round. And the pin bosses might become misaligned. Also the top ring groove will be distorted. Lastly how will you get all the pistons to weigh the same and have the same amount of dome?


Scholman
Ditto on what scholman said, also what about about the shrinkage when you weld on them also.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-09-2011, 06:23 PM
OneMoreTime's Avatar
Hotrodders.com moderator
 
Last wiki edit: Health and safety in the shop or garage
Last journal entry: Yard Dog pic
Last photo:
Join Date: Jul 2004
Location: Washington State
Age: 69
Posts: 7,322
Wiki Edits: 3

Thanks: 46
Thanked 146 Times in 138 Posts
Have you considered casting your own pistons?? Casting aluminum can be done if you are willing to do it..

http://www.alloyavenue.com/vb/content.php

Good place to start..Not every one has access to all the high tech stuff..

Good luck
Sam
__________________
I have tried most all of it and now do what is known to work..
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-09-2011, 06:31 PM
Blazin72's Avatar
You got a leaky spark tube...
 
Last wiki edit: Rearend removal
Last journal entry: General Lee
Last photo:
Join Date: Jul 2005
Location: Union, WA
Age: 32
Posts: 2,868
Wiki Edits: 19

Thanks: 0
Thanked 2 Times in 2 Posts
A comment was made about preheating. There several types of steel (among other metals) that do require a certain preheat before they can be welded then must be allowed to slowly cool. If have an extra cast piston laying around give it a try. What's it going to hurt? Every time I see one of your posts you're always experimenting with something. Maybe find an old junk engine that isn't good for much any more and try it. Do you have access to a lathe and/or mill?
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-09-2011, 08:51 PM
Augusto's Avatar
From the middle of the world
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Mar 2006
Location: Ecuador, South America
Age: 51
Posts: 1,312
Wiki Edits: 6

Thanks: 4
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by Blazin72
A comment was made about preheating. There several types of steel (among other metals) that do require a certain preheat before they can be welded then must be allowed to slowly cool. If have an extra cast piston laying around give it a try. What's it going to hurt? Every time I see one of your posts you're always experimenting with something. Maybe find an old junk engine that isn't good for much any more and try it. Do you have access to a lathe and/or mill?
yes I have a fairly well equipped machine shop.

we must experiment with weird stuff, we don't have easy acces to performance parts and they can become quite pricey when imported from the USA, and for many brands there simply don't exist, I usually think that we must be here like you guys were back in the 50's when hotrodding started.

turbochargers have been one of my best friends when more power is needed, I used to have this nice 1966 Land Rover 88, I installed a blow throgh turbo over a 1bbl Holey carb, this truck was faster than the 4.3 V6 S10 blazers, I enjoyed it a lot, I regret selling it.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 07-09-2011, 08:54 PM
Augusto's Avatar
From the middle of the world
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Mar 2006
Location: Ecuador, South America
Age: 51
Posts: 1,312
Wiki Edits: 6

Thanks: 4
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by OneMoreTime
Have you considered casting your own pistons?? Casting aluminum can be done if you are willing to do it..

http://www.alloyavenue.com/vb/content.php

Good place to start..Not every one has access to all the high tech stuff..

Good luck
Sam
not casted (yet) but I have adapted all kinds of pistons to all kind of engines, specially in motorcycles and 2 stroke racing karts, I?m not sure if I could machine precisely the pin holes, I wish I had a CNC mill... maybe some day I will
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 07-09-2011, 10:00 PM
bigdog7373's Avatar
Of course it's fast
 
Last photo:
Join Date: May 2010
Location: florida
Posts: 2,673
Wiki Edits: 0

Thanks: 13
Thanked 49 Times in 49 Posts
Contact wiseco. They make pistons for every application. If they dont have it in stock, they'll make it.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 07-09-2011, 10:08 PM
Registered User
 
Last photo:
Join Date: Feb 2011
Location: hawaii
Posts: 96
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
I think your best bet would be welding the heads. Is there a prevlent dime a dozen car in your native land? May be worth picking up a few as test subjects, and playing mad doctor. Muahahaha
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 07-09-2011, 10:10 PM
Blazin72's Avatar
You got a leaky spark tube...
 
Last wiki edit: Rearend removal
Last journal entry: General Lee
Last photo:
Join Date: Jul 2005
Location: Union, WA
Age: 32
Posts: 2,868
Wiki Edits: 19

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by bigdog7373
Contact wiseco. They make pistons for every application. If they dont have it in stock, they'll make it.
Yep, 11:1 forged Wiseco pistons for an .080 over Datsun 1.5L set a friend of mine back $120 a piece!
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
After welding pavetim Body - Exterior 13 08-29-2009 08:55 AM
Butt welding vs Spot welding 69ChevelleAddict Body - Exterior 19 05-04-2008 01:47 AM
welding on an oil pan? catfish hunter General Rodding Tech 13 02-01-2007 04:45 PM
welding don alchemy General Rodding Tech 11 09-17-2006 08:45 PM
TIG welding will's53chevy General Rodding Tech 29 12-21-2005 01:38 PM


All times are GMT -6. The time now is 06:08 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.