Crank strength question? - LS1TECH



New LS1 Owners - Newbie Tech Basic Technical Questions & Advice
Sponsored by:
Sponsored by:

Crank strength question?

Reply
 
Thread Tools Search this Thread
Old 07-27-2012, 10:46 PM   #1
Teching In
Thread Starter
 
Join Date: Jan 2012
Location: Mississippi
Posts: 12
Default Crank strength question?

I have been calling around to local machine shops about my ls build lately. last week I got into a discussion with a guy at a machine shop who said the ls stock crank is only good to 500 hp. Is this true? I plan on a build of the upper 400 hp. then it will be sprayed with a 150 shot rarely only when I really want some extra power. The nitrous wont be used all the time. This is a street car car. Do you guys think the factory crank is enough? or will it crack under pressure?
jfg75 is offline   Reply With Quote
Old 07-27-2012, 10:50 PM   #2
TECH Fanatic
iTrader: (11)
 
usnfenix's Avatar
 
Join Date: May 2010
Location: Florida
Posts: 1,011
Default

the LS1 factory crank is perfectly fine up to 900 to 1000 hp. you will be perfectly fine. now the ls1 bottom end (factory rods/pistons) are only good to 500 hp. if this guy is telling you the crank is also than hes an idiot.
usnfenix is offline   Reply With Quote
Old 07-27-2012, 11:56 PM   #3
TECH Fanatic
 
TransAmWS.6's Avatar
 
Join Date: Mar 2011
Location: Maryland
Posts: 1,253
Default

The factory crank/block are usually more than enough for your average street car build, that's usually one of the last things on the list to worry about. However, your stock internals will definitely be a concern
TransAmWS.6 is offline   Reply With Quote
Old 07-28-2012, 12:32 AM   #4
10 Second Club
iTrader: (18)
 
BriancWS6's Avatar
 
Join Date: Mar 2004
Location: The Garage
Posts: 3,907
Default

As already said, people have pushed the stock crank and block to 1k+.
BriancWS6 is offline   Reply With Quote
Old 07-28-2012, 09:28 AM   #5
TECH Fanatic
iTrader: (2)
 
Blk98Vert's Avatar
 
Join Date: Oct 2011
Posts: 1,581
Default

I believe the rule of thumb is 1100, the 4.8 cranks have been pushed further though
Blk98Vert is offline   Reply With Quote
Old 07-29-2012, 10:36 PM   #6
Teching In
Thread Starter
 
Join Date: Jan 2012
Location: Mississippi
Posts: 12
Default

Thanks guys. I knew what he said didnt sound right. That may answer my question about the machine shop haha
jfg75 is offline   Reply With Quote
Old 07-30-2012, 12:59 PM   #7
LS1TECH & Trucks Sponsor
iTrader: (4)
 
Sales4@Texas-Speed's Avatar
 
Join Date: Jan 2007
Posts: 1,770
Default

LOL, yeah I would question their knowledge a little. We have pushed those cranks pretty hard in the past and never had an issue.
Sales4@Texas-Speed is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Stock Cube LS1 6 Spd Nitrous Build high impact Nitrous Oxide 81 11-10-2014 04:13 PM
LS6 Bottom End Rebuild, have some noob questions moespeeds Generation III Internal Engine 11 10-11-2014 02:41 PM
turbo ls2 in a 245" top dragster elkydragger Forced Induction 40 12-20-2013 08:11 PM
Crank Question ls1velle Forced Induction 1 12-23-2012 07:25 PM
Is LS1 crank weaker than LQ9 crank? ninetres Generation III Internal Engine 3 03-23-2009 01:13 AM


Tags
1000, 400, 79, common, corvette, crank, crankshaft, factory, hp, ls1, lsx, mustang, rated, rods, strength, swap

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 01:08 PM.