Today's Posts Mark Forums Read Calendar
Go Back   NJFBOA - Home of New Jersey's Camaros and Firebirds > Tech Forums > Engine / Power / Tuning

Notices


Reply
 
Thread Tools
Old 07-22-2010, 07:54 PM   #1
Blacdout96
 
Blacdout96's Avatar
 
Join Date: Dec 2004
Location: Galloway, NJ
Posts: 3,964
iTrader: (2)
wat to do about bearings.

So a week ago I bought a crank kit to do an engine for a friend. The crankshaft clearance is perfect, but the connecting rods are .007, when minimum is .009. the crank won't turn, so now I'm scratching my head. the kit came with the bearings so I don't know why they are tight when its a set, maybe they wanted the rods to be honed if the rods got scratched. The next size up will be .25mm ( it came with .50mm bearings), but that will make it .109. WAY out of spec unless my calculations are wrong. so whats your take on this engine guru's, what's my next step to gain the necessary clearance?
__________________
1996 Camaro C/S - 2/3 Corvette Engine




Quote:
Originally Posted by BigAls87Z28 View Post
Uh yeah, after they surprized buttsecks us at Pearl Harbor?
Blacdout96 is offline   Reply With Quote
Old 07-22-2010, 09:05 PM   #2
RamAir95TA
 
Join Date: Jul 2009
Location: Bridgeport NJ
Posts: 165
iTrader: (0)
Sounds like you're going to have to have the rods resized/honed.
__________________
-Joe-
1995 Trans Am
Advanced Induction 383, Performabuilt 4L60E, Ford 9", all motor, daily driven.
10.82 @ 124.25, 1.43 60' 455whp, 445wtq
Clip of 10-second pass.

More info: http://www.ls1tech.com/forums/lt1-lt...damn-time.html

Last edited by RamAir95TA; 07-22-2010 at 09:06 PM.
RamAir95TA is offline   Reply With Quote
Old 07-25-2010, 10:27 PM   #3
crainholio
 
Join Date: Nov 2004
Location: Randolph
Posts: 198
iTrader: (2)
Bring the crank and your measurements to a machine shop and have the rod journals polished down to size.
__________________
1982 Z28 w/ '01 LS1 + T56, TR224 cam, Katech oil pump, JWIS chain
crainholio is offline   Reply With Quote
Old 07-26-2010, 03:40 PM   #4
Featherburner
 
Join Date: Jun 2007
Location: Arm pit of the world... NJ
Posts: 2,677
iTrader: (1)
First, mic the crank and then use a bore gauge in the big end of the properly torqued rod to determine which is out of spec. It's very possible the crank wasn't cut and polished properly. Find the problem first, then take corrective measures.
__________________
John
Featherburner is offline   Reply With Quote
Old 07-26-2010, 04:27 PM   #5
Blacdout96
 
Blacdout96's Avatar
 
Join Date: Dec 2004
Location: Galloway, NJ
Posts: 3,964
iTrader: (2)
Im goign to take the crank and rods to my machine shop on wednesday, he'll find whats goign on, Im done racking my head around it.
__________________
1996 Camaro C/S - 2/3 Corvette Engine




Quote:
Originally Posted by BigAls87Z28 View Post
Uh yeah, after they surprized buttsecks us at Pearl Harbor?

Last edited by Blacdout96; 07-26-2010 at 04:29 PM.
Blacdout96 is offline   Reply With Quote
Reply

  NJFBOA - Home of New Jersey's Camaros and Firebirds > Tech Forums > Engine / Power / Tuning


Posting Rules
You may not post new threads
You may not 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

Forum Jump

» Sponsor List














All times are GMT -5. The time now is 08:35 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.