LS series, 6.0 iron block overbore allowance

Dragsinger · 04-03-2009, 10:08 AM

Tell me about the 6.0 iron block cylinder wall thickness. Is an .030 overbore acceptable for 575 horse combination? [Carburetor, no power adders]

Thanks

RJ · 04-03-2009, 06:48 PM

I've never sonic checked a 6.0 block, but have seen a report on one that was done. Worst hole at stock 4.000" bore was .098" on non thrust, .295" on thrust side.

formula447 · 04-06-2009, 01:22 PM

.30 over on a Cast Iron LS Truck block is fine.We make over 700 NA Flywheel Horse on one and have never had a problem.

.30 over(4.030) with a 4" Stroke Crank is the Common 408" Combo that just about all LS Builders Sell.

Ray T

Chris Cogan · 04-07-2009, 08:21 PM

Try to find a pre 2005 (GEN III) version 6.0 block as they do not have the LOMA bosses added in the valley. This will save you approximately 15 lbs of mass.

TOSTO RACING · 04-10-2009, 07:47 PM

You can take some 6.0 blocks .060 I ran my old setup .030 over and made over 700 horse and had no problems at all.

04-03-2009, 10:08 AM	#1
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	LS series, 6.0 iron block overbore allowance Tell me about the 6.0 iron block cylinder wall thickness. Is an .030 overbore acceptable for 575 horse combination? [Carburetor, no power adders] Thanks __________________ Larry Woodfin 471W

04-03-2009, 06:48 PM	#2
RJ Member Join Date: Oct 2002 Posts: 248 Likes: 0 Liked 0 Times in 0 Posts	Re: LS series, 6.0 iron block overbore allowance I've never sonic checked a 6.0 block, but have seen a report on one that was done. Worst hole at stock 4.000" bore was .098" on non thrust, .295" on thrust side.

04-06-2009, 01:22 PM	#3
formula447 Junior Member Join Date: Mar 2008 Posts: 6 Likes: 0 Liked 0 Times in 0 Posts	Re: LS series, 6.0 iron block overbore allowance .30 over on a Cast Iron LS Truck block is fine.We make over 700 NA Flywheel Horse on one and have never had a problem. .30 over(4.030) with a 4" Stroke Crank is the Common 408" Combo that just about all LS Builders Sell. Ray T

04-07-2009, 08:21 PM	#4
Chris Cogan Junior Member Join Date: Apr 2007 Location: Defiance, OH Posts: 47 Likes: 0 Liked 0 Times in 0 Posts	Re: LS series, 6.0 iron block overbore allowance Try to find a pre 2005 (GEN III) version 6.0 block as they do not have the LOMA bosses added in the valley. This will save you approximately 15 lbs of mass. __________________ Chris Cogan

04-10-2009, 07:47 PM	#5
TOSTO RACING Senior Member Join Date: May 2007 Location: DRAGSTRIP Posts: 880 Likes: 853 Liked 613 Times in 178 Posts	Re: LS series, 6.0 iron block overbore allowance You can take some 6.0 blocks .060 I ran my old setup .030 over and made over 700 horse and had no problems at all. __________________ 5664 GHI/SA 1985 CAMARO RED H/SA 1985 CAMARO BLUE I/SA