LS3 Carbed build

General engine tech -- Drag Racing to Circle Track

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JodyB
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Re: LS3 Carbed build

Post by JodyB » Sun Nov 19, 2017 4:24 pm

Square port 6.0:)
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JodyB
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Re: LS3 Carbed build

Post by JodyB » Sun Nov 19, 2017 4:27 pm

Wow, upside down and sideways:) They straighten up when u click them, lol

D.S.R.E.
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Re: LS3 Carbed build

Post by D.S.R.E. » Sun Nov 19, 2017 6:03 pm

Over 700 set up right, I'd go solid roller, let it rpm!
heads need to be right, check out the Mast single plane intake, it will like a tighter LSA than a efi intake
Build it Once Build it Right!

CGT
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Re: LS3 Carbed build

Post by CGT » Sun Nov 19, 2017 6:13 pm

D.S.R.E. wrote:
Sun Nov 19, 2017 6:03 pm
Over 700 set up right, I'd go solid roller, let it rpm!
heads need to be right, check out the Mast single plane intake, it will like a tighter LSA than a efi intake
A solid roller would be cool. But it adds thousands in expense....springs to fit that head that will run a solid roller, lifters, rocker arms etc.

I plan on using mostly all of the oe stuff and travel limiting the stock lifters. 700? Really? Do you have any tips on the heads? The Mast intake is awesome but also out of budget. Thanks for the reply

steve cowan
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Re: LS3 Carbed build

Post by steve cowan » Mon Nov 20, 2017 2:34 am

autogear wrote:
Fri Nov 17, 2017 2:08 pm
Fill out a cam request for Jones Cams?
autogear,
just heads up
chad and randy know plenty about lobe families and whats required for any performance application
just sayin
steve c

RevTheory
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Re: LS3 Carbed build

Post by RevTheory » Mon Nov 20, 2017 8:25 am

Chad, you may want to look up some of SAM's EMC builds to see if something gives you a fancy idea. If I remember right, they went against the grain on the wide LSA deal and did a 104 or something.

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Re: LS3 Carbed build

Post by CGT » Tue Nov 21, 2017 11:52 am

RevTheory wrote:
Mon Nov 20, 2017 8:25 am
Chad, you may want to look up some of SAM's EMC builds to see if something gives you a fancy idea. If I remember right, they went against the grain on the wide LSA deal and did a 104 or something.
Yeah, I've looked that stuff over through the years. This will be built with an rpm range a decent amount higher than EMC. That starts changing things in my opinion. It will most likely be pulled from 5 to 7500 or higher possibly, seeing as it is predominantly another dyno toy. But cam changes are simple on these things SO....... :lol:

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Re: LS3 Carbed build

Post by steve316 » Tue Nov 21, 2017 11:59 am

I understand about budgets; if porting the intake is in your future look @ all-pro intake it is the real deal. :)

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Re: LS3 Carbed build

Post by RevTheory » Tue Nov 21, 2017 12:27 pm

Sounds fun!

CGT
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Re: LS3 Carbed build

Post by CGT » Tue Nov 21, 2017 1:01 pm

steve316 wrote:
Tue Nov 21, 2017 11:59 am
I understand about budgets; if porting the intake is in your future look @ all-pro intake it is the real deal. :)
Ill take a look. Thanks Steve.

gas 84k
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Re: LS3 Carbed build

Post by gas 84k » Sat Nov 25, 2017 4:06 pm

I think 650 will be quite achievable
I just finished a 4.0 x 3.622 wossner pistons total seal rings plate honed with a Jones Cam 232/235 276/292 612/600 112 on 108 ICL LS7 lifters I left the cross section just cleaned up the spring pad rocker bolt etc on the intake ported the exhaust I will have to find my measurements on the exhaust but set the throats @ 89% both sides 3/8 pushrods .
As the engine went into a VE it went on rollers with a Manual it made 487 @ 7000 at the tyres curve was flat as hell from 3500 to 5500
I would of loved to feed it E85 and 13.5 to 1 in saying that I didn’t look fully at the calcs to achieve this and don’t believe this would be acheivable with a flat top and keeping integrity in the heads .

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Re: LS3 Carbed build

Post by CGT » Tue Nov 28, 2017 10:28 am

Resized_20171127_172434.jpg
Resized_20171127_172451.jpg
Ls3 head on 4.065 bore and Ls3 head on 4.065 bore with .030 offset pin.
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3pedals
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Re: LS3 Carbed build

Post by 3pedals » Thu Nov 30, 2017 8:45 pm

I made 648 @7500 , 526 @ 5400, on a basically stock truck LY6 6.0 with LS3 heads.
Heads milled .050", and .040"x 4.00
gaskets for compression.
Ports hand blended in the bowls by me. Nothing much done really.
Oem valve job.
Cam was a hydraulic. Done by Bret Bauer. 236/262 110lsa in strait up.
Intake was edelbrock Vic jr L92, with injector bosses ported out. 1" open carb spacer.
850 mighty demon carb
1 3/4" headers

CGT
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Re: LS3 Carbed build

Post by CGT » Thu Nov 30, 2017 9:29 pm

3pedals wrote:
Thu Nov 30, 2017 8:45 pm
I made 648 @7500 , 526 @ 5400, on a basically stock truck LY6 6.0 with LS3 heads.
Heads milled .050", and .040"x 4.00
gaskets for compression.
Ports hand blended in the bowls by me. Nothing much done really.
Oem valve job.
Cam was a hydraulic. Done by Bret Bauer. 236/262 110lsa in strait up.
Intake was edelbrock Vic jr L92, with injector bosses ported out. 1" open carb spacer.
850 mighty demon carb
1 3/4" headers
Thats 1.44 tq per cube. World class tq on an honest dyno for that kind of deal. . Any more details on that build......dyno.....cf etc. Where has Bret been btw?

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Re: LS3 Carbed build

Post by 3pedals » Thu Nov 30, 2017 9:42 pm

The dyno may have been a little happy, Idk. It was calibrated during the dyno day session, because the operator couldnt believe it.
Correction was STP, I have to look to see if uncorrected data is still avail. That was 2012.
Was run on 91 octane non wth gas.
Car weighed 3425lbs and trapped 130 with a stick shift
I don't know where Bret is? I couldn't get a hold of him to do a turbo cam for me???

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