gdbauer7 Posted February 15, 2007 Report Share Posted February 15, 2007 Just curious what the max HP the LQ9 crank and rods could hold. Quote Link to comment Share on other sites More sharing options...
04CHASE Posted February 15, 2007 Report Share Posted February 15, 2007 id say around 650-700 fwhp, dont ask how i know Quote Link to comment Share on other sites More sharing options...
nxtnlne Posted February 15, 2007 Report Share Posted February 15, 2007 id say around 650-700 fwhp, dont ask how i know I feel for chase... Quote Link to comment Share on other sites More sharing options...
misterp Posted February 15, 2007 Report Share Posted February 15, 2007 (edited) id say around 650-700 fwhp, dont ask how i knowI'd qualify that with the statement "assuming you have a perfect tune"; I know a lot of other Gen-III owners (trucks, f-bodies, vettes) regularly see the top piston ring land completely let go around the 550+ mark (it is my opinion that this is what happened to Chase's LQ9). The stock Gen-III crank is actually a very stout piece and you'll probably lift a head or split the block before the crank gives. The factory rods are not that bad provided you replace the weak-ass factory bolts with ARP rod bolts, and if you are going to increase stroke and/or rev higher than 6500-rpm you might be generating loads that will require forged/billet rods. Mr. P. Edited February 15, 2007 by misterp (see edit history) Quote Link to comment Share on other sites More sharing options...
kelleyperformance Posted February 15, 2007 Report Share Posted February 15, 2007 i agree with you Mr.P.... have replaced a crap load of piston rings on vettes and f-bodys.... its generally arround 550 whp that stuff starts breaking. but its almost always the cast pistons and/or rings. ive only seen one broken crank(on our dyno big mess), and it put down like 825 to the wheels (incase ppl are wondering, Biturbo lingenfelter z06 ). the mid 04+ rods are a very nice piece, and IMO the floating assymbly helps keep things together better as opposed to the press-on. BUT mr.p, i disagree with the block statement. the kind of power it takes to break the LQ9 block (assumming everything is done correctly and running correctly) is absolutely insane Quote Link to comment Share on other sites More sharing options...
gixxerrider Posted February 16, 2007 Report Share Posted February 16, 2007 id say around 650-700 fwhp, dont ask how i know Dont ask him get do a search. Sorry Chase. Quote Link to comment Share on other sites More sharing options...
misterp Posted February 16, 2007 Report Share Posted February 16, 2007 ...BUT mr.p, i disagree with the block statement. the kind of power it takes to break the LQ9 block (assumming everything is done correctly and running correctly) is absolutely insaneMy bad, I misspoke yes the iron Vortec block will hold up well into the 1000+ hp range; my mind has been focused on aluminum cylinder cases lately, they do not hold up as well as the iron block without a girdle. Mr. P. Quote Link to comment Share on other sites More sharing options...
NolletSSS Posted February 16, 2007 Report Share Posted February 16, 2007 holly crap 1000+ Hp. I need to go to bed so I can start dreaming...haha... just never wake me. Quote Link to comment Share on other sites More sharing options...
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