LS build ???
Thread Starter
10 Second Club
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
LS build ??? I'm pretty sure I'm going LSX on my next motor and have looked until my sight went blurry.
Here's what I come up with on an econo buld 550+hp...What you think ???
LQ4 or 9 (ie: cheap to buy) overbore .020-.030 ? (unsure whats standard on an LSmotor
Stock crank and rods NEW pistons
11:1-11.5:1 compression
L92 heads (may need shaved)
Cam....thinking 230/240 on a 106 or 108 LSA
Give me your thoughts.
Here's what I come up with on an econo buld 550+hp...What you think ???
LQ4 or 9 (ie: cheap to buy) overbore .020-.030 ? (unsure whats standard on an LSmotor
Stock crank and rods NEW pistons
11:1-11.5:1 compression
L92 heads (may need shaved)
Cam....thinking 230/240 on a 106 or 108 LSA
Give me your thoughts.
Just get a low mile ly6. They come with the l92 heads already, and all you need is a cam, springs, and maybe mill the heads for some squeeze.
That's what I run, but I haven't milled my heads.... Yet
That's what I run, but I haven't milled my heads.... Yet
Thread Starter
10 Second Club
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
I'm trying to keep it low as possible but not sacrifice longevity.
I thought the rods were fine w/ ARP bolts ?
I guess it could be stroked too ? (cheap and rotating assembly don't go well)
I am also sticking with a carb set-up.
The car (68 Camaro) is not a daily driver and it may see 1000 miles a year at most. I do like to race it (drag race).
Car specs...
3400ish w/ driver (may be a little less?)
4.10 spool, 35 spline axles, c-clip eliminators
4500 9.5" stall
th350 w/ shift kit (auto/manual valve body)
275/60/15 MT Drag Radials
I thought the rods were fine w/ ARP bolts ?
I guess it could be stroked too ? (cheap and rotating assembly don't go well)
I am also sticking with a carb set-up.
The car (68 Camaro) is not a daily driver and it may see 1000 miles a year at most. I do like to race it (drag race).
Car specs...
3400ish w/ driver (may be a little less?)
4.10 spool, 35 spline axles, c-clip eliminators
4500 9.5" stall
th350 w/ shift kit (auto/manual valve body)
275/60/15 MT Drag Radials
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Staging Lane
Joined: Apr 2010
Posts: 86
Likes: 0
From: Pittsburgh
I'm doing the same build pretty much and have a 402 lq4 with 11.5:1 comp stage 3 L92s mast intake maifold pro systems 1000cfm carb and thunder racing custom cam 24x/25x on a 112 llooking for 550rwhp plus, it's almost done so I'll be posting numbers this week oh yea no ac or power steering with electric wp, good luck
Thread Starter
10 Second Club
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
Thread Starter
10 Second Club
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
As for "econo" (everyone has their own limits) but I see guys here (and other sites) doing a cam,head,and intake on stock block LSX motors and in the 10's (some in the 9's)....550+ sounds do-able on a budget. I just want a step or three up for piece of mind.
I could do a Dart 400" in the 550+ range for $6 or $7 K.
I called about a stock rebuild and was told approximately $2K just for decking (if needed),new bearings,gaskets,ARP bolts,resize the rods,and assembly (I'm sure I missed something)
Remember the install parts will be about 1000-1500 as I will buy the kit. I could piece together and save $$$ but I think a kit would be quick and easy.
Last edited by Doug G; Apr 28, 2011 at 03:32 PM.
+1 on the LY6 idea^^^. You can't hardly beat picking up a cheap motor with the L92 heads already installed. I paid $1800 for mine complete with less than 3000 miles on it. My longblock is stock except for a cam, springs, pushrods and aftermarket rod bolts for added RPM insurance. It won't be easy to achieve the CR you're looking for with the stock dished LY6 pistons, but you could easily get it to 10.5:1 or so with a .030 mill and thinner .040 gaskets. Stock CR is 9.67:1 on a LY6.
doug, if you get a low mile engine, you dont need to do a rebuild, all except the head gaskets are re-usable, and there is no need to do any machine work except maybe head milling if wanted. ARP replacement bolts are a real cost. - if your really want to spend money, you could buy stock bore flat top pistons to fit the low mile LY6 to get you up to 11.5:1(or more) with a small head mill job.
I plan to take a BIG cut out of my L92 heads, and mill intake to match, to get my stock piston LY6 up to the 10.8-11:1 range. I may replace the rod bolts for ***** and giggles, but i've had no trouble with the oem rodbolts up to 7200 so far.
a 6 quart oil pan is a good investment I'm told, when 7K+ RPMs are in store. My next purchase for my 6.0 will be a moroso pan, I should not have wasted the time modding the stock pan, as I am liking the high rev nature of this thing, with more rpm in the future!
Barrett
PS L96 is the new name for 09 and newer 6.0 w/ L92 heads installed oem. Look at the 2500series trucks at the salvage yards.
PSS stay away from the AFM equiped engines unless you get a smoking deal, as you need to replace the lifters, and do a couple other small things.....
I plan to take a BIG cut out of my L92 heads, and mill intake to match, to get my stock piston LY6 up to the 10.8-11:1 range. I may replace the rod bolts for ***** and giggles, but i've had no trouble with the oem rodbolts up to 7200 so far.
a 6 quart oil pan is a good investment I'm told, when 7K+ RPMs are in store. My next purchase for my 6.0 will be a moroso pan, I should not have wasted the time modding the stock pan, as I am liking the high rev nature of this thing, with more rpm in the future!
Barrett
PS L96 is the new name for 09 and newer 6.0 w/ L92 heads installed oem. Look at the 2500series trucks at the salvage yards.
PSS stay away from the AFM equiped engines unless you get a smoking deal, as you need to replace the lifters, and do a couple other small things.....
Last edited by 3pedals; Apr 28, 2011 at 07:40 PM.
Thread Starter
10 Second Club
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
HHHhhhmmmmm.... I'll have to take a look-see 
Thanks.
DISPLACEMENT: 364 ci
BLOCK: Cast iron
HEADS: Aluminum 15-degree rectangle port
BORE/STROKE: 4.000 x 3.622
COMPRESSION: 9.67:1
OUTPUT: 352 hp and 382 lb-ft
WHAT IT’S IN: 3/4-ton '07+ Silverado, Sierra, Suburban, and Yukon
Thanks.DISPLACEMENT: 364 ci
BLOCK: Cast iron
HEADS: Aluminum 15-degree rectangle port
BORE/STROKE: 4.000 x 3.622
COMPRESSION: 9.67:1
OUTPUT: 352 hp and 382 lb-ft
WHAT IT’S IN: 3/4-ton '07+ Silverado, Sierra, Suburban, and Yukon
Thread Starter
10 Second Club
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
and a LY6 @ 9.67:1 compression and mill the heads .0?? per cc (.030 seems like alot)... and the heads are ??? cc from the factory ?
IIRC, a good rule of thumb on most LS chamber designs is -1cc for every .006 cut, so a .030 cut SHOULD be -5cc. As 3pedals said, you're starting around 70ccs with L92s so a .030 cut should get you to 65cc. Add a .040 gasket and that would put an LY6 around 10.5:1 SCR.
Thread Starter
10 Second Club
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
Got it.
Now IF I cut it .030, AND could get the correct thickness MLS gasket I could see about 10.6:1 which I could live with I guess.
Just read an article on a LQ4 with a big cam and L92 heads making 550+HP (was a magazine article so take it for what its worth)
Now IF I cut it .030, AND could get the correct thickness MLS gasket I could see about 10.6:1 which I could live with I guess.
Just read an article on a LQ4 with a big cam and L92 heads making 550+HP (was a magazine article so take it for what its worth)