LS3 Carbed build

General engine tech -- Drag Racing to Circle Track

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CGT
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Re: LS3 Carbed build

Post by CGT » Fri Oct 12, 2018 12:14 pm

ns158sl wrote:
Thu Oct 11, 2018 8:34 pm
Yep! Engine Dyno. Like I said I am a lot farther out than you are, haha. Goal is around july/august. Im hoping to get close to around 700hp around 7500rpm. That's just hopes and dreams right now.

Eric
Good luck, Keep us posted. Mine dyno shouldn't be too far off really. Just have to stay interested.
"How or Y do you think I get all this $hit, I read all of you all builds and desktop dyno them with all the correct info and I've got your build."

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Re: LS3 Carbed build

Post by CGT » Mon Oct 22, 2018 11:18 am

As an update on the LS3. I purchased the Daytona sensors ignition, 2821 Super Victor 4500 flange, GZ vacuum pump, Whitener 1050. Also purchased the hollow stem LS9 exhaust valves that RW TECH mentioned to me. Its coming along...slowly but surely.
"How or Y do you think I get all this $hit, I read all of you all builds and desktop dyno them with all the correct info and I've got your build."

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Re: LS3 Carbed build

Post by CGT » Fri Oct 26, 2018 11:03 am

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More pics.....trying like hell to keep this thread alive :D :lol: Is it too real???/ lol
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"How or Y do you think I get all this $hit, I read all of you all builds and desktop dyno them with all the correct info and I've got your build."

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Re: LS3 Carbed build

Post by GARY C » Fri Oct 26, 2018 12:34 pm

Runners look big.
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Re: LS3 Carbed build

Post by Carnut1 » Fri Oct 26, 2018 12:38 pm

Nice looking intake. I am behind on this thread, worked up gm ls3 heads? Thanks, Charlie
Servedio Cylinder Head Development
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Re: LS3 Carbed build

Post by CGT » Fri Oct 26, 2018 2:04 pm

GARY C wrote:
Fri Oct 26, 2018 12:34 pm
Runners look big.
Well.....I don't like to brag!! :lol:

Ported LS3 castings initially. The engine has no home, so it will just be a dyno test piece. A lot of people give me a lot of ideas on what they would like to see tested. But...I would like to dyno against a stock untouched ls3 head, an epoxied head, a smaller cathedral port head and manifold, camz etc etc.

I'm mostly worried about the valvetrain being happy at the speed this thing is likely to want to run at. I guess I need a GoFundMe lol. Castings for these things are pretty inexpensive, so that will help...but if I can dyno a couple times a year and test....itll be a worthwhile investment to me....not planning on taking up golf anytime soon so...
d5a2028ffe42a06805dd3984e0e58375.png
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"How or Y do you think I get all this $hit, I read all of you all builds and desktop dyno them with all the correct info and I've got your build."

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Re: LS3 Carbed build

Post by CGT » Fri Oct 26, 2018 3:31 pm

MOO MOO
"How or Y do you think I get all this $hit, I read all of you all builds and desktop dyno them with all the correct info and I've got your build."

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Re: LS3 Carbed build

Post by GARY C » Fri Oct 26, 2018 6:04 pm

CGT wrote:
Fri Oct 26, 2018 3:31 pm
MOO MOO
You gonna "milk" some power out of that LS?... See what I did there. :)
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Rowdy Yates
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Re: LS3 Carbed build

Post by Rowdy Yates » Mon Oct 29, 2018 12:17 am

Sounds familiar......... Save the money on bullshit testing waste of time and $. If not yet purchased get a gz vacuum pump.

https://ls1tech.com/forums/dynamometer- ... 0-e85.html

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Re: LS3 Carbed build

Post by Rowdy Yates » Mon Oct 29, 2018 12:32 am

Comp cams adjustable 1.8 rockers with custom guide plates for larger 7/16 studs with stud girdle. 8000+ Comp cams has the larger trunion kit for the rockers also. Solid roller done cheap that's adjustable. Larger stud for safety. With a hydraulic roller and under 700 lift seem perfect as is with 8mm studs.


Also the super vic is limited to or about 7500. Work is needed for anything past 7500.

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Re: LS3 Carbed build

Post by CGT » Mon Oct 29, 2018 8:49 am

Rowdy Yates wrote:
Mon Oct 29, 2018 12:17 am
Sounds familiar......... Save the money on bullshit testing waste of time and $. If not yet purchased get a gz vacuum pump
So I shouldn't do any testing? :lol: . I have a GZ pro pump.
Rowdy Yates wrote:
Mon Oct 29, 2018 12:32 am
Also the super vic is limited to or about 7500. Work is needed for anything past 7500.
Its certainly got enough CSA, runner length?
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Re: LS3 Carbed build

Post by Rowdy Yates » Mon Oct 29, 2018 9:47 am

Test the heads you have now.....
Cathedral heads will make more Tq but lose up top.
Epoxy Ls3 heads with work will make a bit more Tq and power will be about the same as a set of ported Ls3 heads.


The intake thought comes from a EMC friend who's done the same basic build with a solid roller. I have the same intake just efi with a 4500 accufab TB. 7500 is my peak for the Ls3 combination.

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Re: LS3 Carbed build

Post by Rowdy Yates » Mon Oct 29, 2018 10:05 am

The intake is decent for a 7000 rpm engine, but needed a lot of work for 8000. Plus there are some things that I like doing with the floor and runner entrance of intakes that seem to make good power and run better. intake.

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Re: LS3 Carbed build

Post by In-Tech » Mon Oct 29, 2018 10:06 am

I would bet that you will make that manifold work just fine for your project. I'm a 2 4bl kinda guy so if you run out of manifold, have Mark make ya another carb thingy. :mrgreen:
300-112.jpg
Holley 300-112
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https://www.holley.com/products/intakes ... ts/300-112
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Heat is energy, energy is horsepower...but you gotta control the heat.
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Re: LS3 Carbed build

Post by CGT » Mon Oct 29, 2018 10:19 am

Rowdy Yates wrote:
Mon Oct 29, 2018 9:47 am
The intake thought comes from a EMC friend who's done the same basic build with a solid roller.
That intake would be a bad choice for an EMC engine, unless it was really big cube. So....no need for me to test anything? Its that cut and dry? Cathedral for torque, square port for hp? :D . That simple...hmm
"How or Y do you think I get all this $hit, I read all of you all builds and desktop dyno them with all the correct info and I've got your build."

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