6.0 build - Chevelle Tech
LSx Engine Discuss the LSx engine & associated components here.

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post #1 of 44 (permalink) Old Oct 21st, 19, 5:06 PM Thread Starter
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Justin
 
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6.0 build

My buddy has a LS block and had it already machined. It’s 6.0 block with rods and crank. Said he’ll give me a good deal on it. So I’ll probably be picking that up soon. It’s bored .030 over and just needs to be honed when the piston selection is made.

This is going to be a NA build, daily driver with a T56. How would you guys built it? Has anyone ran the 5.3 heads on a 6.0? He said that is a good combination. Thank you in advance.

1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3.73s
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post #2 of 44 (permalink) Old Oct 21st, 19, 6:22 PM
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jeff
 
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Re: 6.0 build

I ported some 5.3 heads and some LQ9 heads.
I say go small chamber. I tried to get my buddy to go small chamber..I feel the smaller valve could allow more piston to valve clearance. Yea I would leave the smaller valves in them.

But I am old school and like a lot of compression..Heck these engines have excellent cooling and very modern chambers.
I roughed up the runners in both pairs of heads i ported..I feel atomization is not there as they are.

Carbed the LQ9 and no regrets. 109 LSA cam .100" piston to valve clearance.
Rocker upgrades and correct length pushrods and 313 rate beehive springs 130 seat pressure. 7000 rpm without a whimper.

222-232 @.050 and .557" lift.

Things I would try if it was mine. I would try the smaller chamber head and I like duration something in the 245 area and maybe even tighter LSA Just to see what would happen.

If I could get 11:0 or more compression maybe this grind or the old 288 roller grind.
https://www.summitracing.com/parts/c...make/chevrolet
That is the XR300HR BBC
Use those masters for the LS.
That would be one bad sounding ride with some 3" pipes..If you are into sound..and I bet it would run.

I just want to see what it takes to blow one up naturally aspirated.
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post #3 of 44 (permalink) Old Oct 22nd, 19, 10:09 AM
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Jeff
 
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Re: 6.0 build

Honestly if I built mine from scratch I'd bolt on LS3 heads / intake. They flow better than the LS1/2 heads and allow larger valves to work with the bigger bore.

I'm running stock 100k+ low compression LQ4 long block, lifters, pushrods, timing chain, 317 heads, LS6 intake, flex fuel 33lb/hr junkyard injectors, Elgin e1839p cam (220/224, .575" lift, 108 LSA, and PAC 1218 springs. I could always use more power, but power to $ ratio is high and brings many smiles per mile. I just cleaned up the exterior of the engine, did summit roller trunion upgrade, ported and shimmed relief spring in oil pump, installed new cam and springs, and regasketed it. Love it!

It's enough to get you in trouble / scare you whenever you want.
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*Jeff*

Project Salty - 1964 4 door Malibu, beaten, neglected, red headed foster child
LQ4 / T56 Swap
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post #4 of 44 (permalink) Old Oct 22nd, 19, 11:36 AM
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George
 
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Re: 6.0 build

I bought a lq4 which turned out to be a gen 3. We rebuilt mine and let the magic out as my friends tell me

I went with this:
Bought reconditioned gen 4 rods on ebay for $116. Used them with the stock rod bolts. Kept stock crank.

Summit forged flattop pistons ( made by wiseco) and their rings.

Summit 8702 stage 3 cam. Summit trunion upgrade, trick flow double springs, hardened pushrods. Stock 862 heads ( small chamber same as 706). Ls7 lifters. LS 9 head gaskets.

Melling hp oil pump, summit double roller chain, vic jr intake, 750 or 850 dbl pumper, msd 6014 controller. Nos cheater plate.

Had rotating assembly balanced, block zero decked and bored .030.

Including the cost of the engine I have about $4000 in it including all the swap stuff.

Compression is right at 11.5:1 and with the stock heads should be about 450-475 hp. Going to see how it runs as is, then may upgrade heads.

Engine has been done for all summer, will swap it over the winter.
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'71 Malibu
3580 #, Carbed 6.0l LS swap in process
T-350, PTC 9" converter, 12 bolt, spool, 3.90 gears, MT ET R 275/60/15

355 [email protected]
125 [email protected]
383 Mud Motor- [email protected]
100 shot [email protected]
'72 Greenbrier Wagon: 454, 700R4, 12 bolt with 3.73
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post #5 of 44 (permalink) Old Oct 22nd, 19, 12:23 PM Thread Starter
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Justin
 
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Quote:
Originally Posted by Hotwire View Post
Honestly if I built mine from scratch I'd bolt on LS3 heads / intake. They flow better than the LS1/2 heads and allow larger valves to work with the bigger bore.

I'm running stock 100k+ low compression LQ4 long block, lifters, pushrods, timing chain, 317 heads, LS6 intake, flex fuel 33lb/hr junkyard injectors, Elgin e1839p cam (220/224, .575" lift, 108 LSA, and PAC 1218 springs. I could always use more power, but power to $ ratio is high and brings many smiles per mile. I just cleaned up the exterior of the engine, did summit roller trunion upgrade, ported and shimmed relief spring in oil pump, installed new cam and springs, and regasketed it. Love it!

It's enough to get you in trouble / scare you whenever you want.
That can sounds about right for what I am going to need. My biggest thing is, I don’t know what heads to run. And I don’t know what intake to run.

1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3.73s
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post #6 of 44 (permalink) Old Oct 22nd, 19, 12:34 PM Thread Starter
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Justin
 
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Quote:
Originally Posted by Geo71 View Post
I bought a lq4 which turned out to be a gen 3. We rebuilt mine and let the magic out as my friends tell me <img src="https://www.chevelles.com/forums/images/smilies/biggrin.gif" border="0" alt="" title="Big Grin" class="inlineimg" />

I went with this:
Bought reconditioned gen 4 rods on ebay for $116. Used them with the stock rod bolts. Kept stock crank.

Summit forged flattop pistons ( made by wiseco) and their rings.

Summit 8702 stage 3 cam. Summit trunion upgrade, trick flow double springs, hardened pushrods. Stock 862 heads ( small chamber same as 706). Ls7 lifters. LS 9 head gaskets.

Melling hp oil pump, summit double roller chain, vic jr intake, 750 or 850 dbl pumper, msd 6014 controller. Nos cheater plate.

Had rotating assembly balanced, block zero decked and bored .030.

Including the cost of the engine I have about $4000 in it including all the swap stuff.

Compression is right at 11.5:1 and with the stock heads should be about 450-475 hp. Going to see how it runs as is, then may upgrade heads.

Engine has been done for all summer, will swap it over the winter.
Do you have the part number to those pistons? Also did you milk the heads at all? Install bigger valves?

1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3.73s
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post #7 of 44 (permalink) Old Oct 22nd, 19, 2:14 PM
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George
 
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Re: 6.0 build

Quote:
Originally Posted by JF74chevelle View Post
Do you have the part number to those pistons? Also did you milk the heads at all? Install bigger valves?
This link is for the Gen 3 rods...

https://www.summitracing.com/parts/sum-3269454030-2 I ended up using the Gen 4 rods which they also have pistons for, the pins are different sizes so we just honed them out little to fit. Could have sent them back to swap, but I didn't want to wait.

The heads were just surfaced a little, they already have 61cc chambers. The LS 9 gaskets are .055 thick, with thinner gaskets could easily go much higher on compression. Stock valve sizes. Search Richard Holdener on Facebook and Youtube. He has done a lot of builds with these heads, they make great power stock. I want to start there and then upgrade if needed. Maybe get some 799 heads and have them ported....
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'71 Malibu
3580 #, Carbed 6.0l LS swap in process
T-350, PTC 9" converter, 12 bolt, spool, 3.90 gears, MT ET R 275/60/15

355 [email protected]
125 [email protected]
383 Mud Motor- [email protected]
100 shot [email protected]
'72 Greenbrier Wagon: 454, 700R4, 12 bolt with 3.73
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post #8 of 44 (permalink) Old Oct 22nd, 19, 2:16 PM
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Re: 6.0 build

Quote:
Originally Posted by JF74chevelle View Post
That can sounds about right for what I am going to need. My biggest thing is, I donít know what heads to run. And I donít know what intake to run.
If you are going to run EFi, the stock truck intakes make great power....buddy has one on his 5.3, upgraded injectors, Sloppy Stage 2 cam and small turbo...rums 9.70's at 139....for a carb the vic jr is what most i know are using.
davewho1 likes this.

'71 Malibu
3580 #, Carbed 6.0l LS swap in process
T-350, PTC 9" converter, 12 bolt, spool, 3.90 gears, MT ET R 275/60/15

355 [email protected]
125 [email protected]
383 Mud Motor- [email protected]
100 shot [email protected]
'72 Greenbrier Wagon: 454, 700R4, 12 bolt with 3.73
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post #9 of 44 (permalink) Old Oct 22nd, 19, 3:41 PM
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Jeff
 
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Re: 6.0 build

The 317s flow the same if not better in some parts than the 799/243 heads, just have larger combustion chambers that drop compression.

As stated above the truck intakes are ugly but flow the best. Only reason I'm running an LS6 intake was hood clearance because my engine is set too high in the engine bay. (BMR engine mounts, don't buy)

Here's head flow #s: Surprising HP Numbers From Our Stock LS Cylinder Head Test

These were LS1/LQ based heads, no LS3.
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*Jeff*

Project Salty - 1964 4 door Malibu, beaten, neglected, red headed foster child
LQ4 / T56 Swap
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post #10 of 44 (permalink) Old Oct 22nd, 19, 4:34 PM
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Re: 6.0 build

I have thought about selling my big block to go LS, after looking at a 408 stroker set up, I am going to stick with my big block unless they have some boost.
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post #11 of 44 (permalink) Old Oct 22nd, 19, 6:58 PM
 
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Re: 6.0 build

I have LS3 heads and intake on mine and have no complaints.

65 Chevelle Malibu 2dr HT LS Swapped


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post #12 of 44 (permalink) Old Oct 22nd, 19, 7:13 PM
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Vince
 
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Re: 6.0 build

If one is going through the trouble of swapping LS3/L92 heads on which necessitates an intake, TB, rocker arms, gasket and bolts etc etc, why not just buy a used L92 engine? Is it THAT much more money?? You will also be getting a larger bored engine which should help the heads flow better.

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post #13 of 44 (permalink) Old Oct 22nd, 19, 7:29 PM Thread Starter
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Justin
 
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Quote:
Originally Posted by 69-CHVL View Post
If one is going through the trouble of swapping LS3/L92 heads on which necessitates an intake, TB, rocker arms, gasket and bolts etc etc, why not just buy a used L92 engine? Is it THAT much more money?? You will also be getting a larger bored engine which should help the heads flow better.
The 6.0 block I’ll be getting is 4.030 bore

1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3.73s
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post #14 of 44 (permalink) Old Oct 23rd, 19, 2:31 AM Thread Starter
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Justin
 
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Okay so I think my plan is
Camshaft: 224/228 @.050 .600/.600 lift 112LSA
Heads: 5.3 heads (706 or 862) worked over by Texas speed
Truck intake manifold not entirely sure on a specific one yet.
Hopefully around 11:1 compression

1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3.73s
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post #15 of 44 (permalink) Old Oct 23rd, 19, 8:28 AM
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Jeff
 
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Re: 6.0 build

Quote:
Originally Posted by JF74chevelle View Post
Okay so I think my plan is
Camshaft: 224/228 @.050 .600/.600 lift 112LSA
Heads: 5.3 heads (706 or 862) worked over by Texas speed
Truck intake manifold not entirely sure on a specific one yet.
Hopefully around 11:1 compression
Go with the TBSS intake. The older style truck intakes look like a hot mess and need a cover over them or shaving to resemble anything you'd want to look at. The tbss intakes are squarish, came in 06+ trucks, tbss, etc. They're the king of flow compared to any other stock intake.
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*Jeff*

Project Salty - 1964 4 door Malibu, beaten, neglected, red headed foster child
LQ4 / T56 Swap
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