1000hp from a LQ4 block? - LS1TECH

Log In 


Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9
Sponsored by:
Sponsored by:

1000hp from a LQ4 block?

Reply
 
Thread Tools Search this Thread
Old 06-10-2012, 10:10 AM   #1
Teching In
Thread Starter
 
Join Date: Aug 2009
Posts: 5
Default 1000hp from a LQ4 block?

Trying to decide on which route to take.. I don't know much about the iron blocks, so I figured I'd ask. Will the LQ4 block support around 1000whp through a TH400? I'll be running a pair of billet 67's (T4 based), and LS3 heads. Stock bore.. What would you guys recommend stroke-wise? I'd like to keep the compression height and rod/stroke reasonable, as I don't want to chew up pistons/rings. Also, should I machine for larger head bolts, or will stock diameter in a L19 alloy work? So, just a few questions before I get started.. Thanks for the help.

Travis
Trav4011 is offline   Reply With Quote
Old 06-11-2012, 01:15 AM   #2
TECH Addict
iTrader: (27)
 
gnx7's Avatar
 
Join Date: Nov 2002
Location: San Francisco, CA
Posts: 2,685
Default

Ditch the LS3 heads and spend the money on some quality thick deck heads.

I did have a buddy make 950rwhp+ on LS3 heads on a 378ci LS3 forged motor.... (with turbo) and no head sealing issues. Main issue was rear main seal leakage which was solved with a GZ Motorsports vacuum pump. An LQ9 iron block will take 1000rwhp. Beyond that HP level and the limit will be the 4 bolt heads to keep the head gaskets sealed. Most run LS9 gaskets with ARP head studs. Make sure you have the tune spot on.
gnx7 is offline   Reply With Quote
Old 06-11-2012, 08:57 AM   #3
9 Second Club
iTrader: (79)
 
helicoil's Avatar
 
Join Date: Aug 2006
Posts: 1,347
Default

I have done a couple of these, both of which are still going strong. The LQ9 is plenty stout to handle those needs.

I usually have them prepped the way this one is.

Race prepped 6.0 Iron LQ9 for BIG BOOST - NEW

The 1/2" head studs help a bunch, the main dowels are very important. Keeping the bore the smallest you can will help in cylinder strength. A standard stroke would be a very reliable package with those twins, although a 4" crank will work too. Lots of piston strength in the stock stroke version and they are available off the shelf without custom ordering.


Quote:
Originally Posted by Trav4011 View Post
Trying to decide on which route to take.. I don't know much about the iron blocks, so I figured I'd ask. Will the LQ4 block support around 1000whp through a TH400? I'll be running a pair of billet 67's (T4 based), and LS3 heads. Stock bore.. What would you guys recommend stroke-wise? I'd like to keep the compression height and rod/stroke reasonable, as I don't want to chew up pistons/rings. Also, should I machine for larger head bolts, or will stock diameter in a L19 alloy work? So, just a few questions before I get started.. Thanks for the help.

Travis
helicoil is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
lq4 crank fresh polished. 5.3 cutty Parts Classifieds 6 05-31-2015 03:21 PM
6bolt head on 4bolt block? GT-CORDY Forced Induction 18 09-06-2013 12:56 PM
500 hp Ls1 or ls2 bp944 Generation III Internal Engine 7 10-24-2010 11:48 AM
Need advice Building a motor LQ4 or LQ9 gpr New LS1 Owners - Newbie Tech 3 09-02-2010 07:42 PM
LQ4 stock crank - what stroke - 4"? robertbartsch Generation III Internal Engine 2 07-01-2003 04:01 PM


Tags
1000, 1000hp, 1000whp, block, build, horsepower, hp, internals, lq4, lq9, ls3, ls3forged, stock, th400, transport

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 05:35 AM.