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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 Sep 06, 2019 4:11 pm

Orr89rocz wrote:
Fri Sep 06, 2019 12:41 pm
Believe i seen a 416 stroked ls3 with ported ls3 heads make 812 hp with cid intake. Solid roller 7800 rpm
I mean its definitely possible for sure. A 15° sbc would easily smoke a 15° LS, but for using factory heads....how can you complain. Its fun seeing what you can get out of O.E stuff, I've tried to keep as much of it as possible, at least at first. I recently saw a 402 LS carbed with 243 cathedrals on the dyno I frequently use and I was really impressed by it.

Hell if you just listen to the internet. I shouldn't have wasted all my time. I should have just left it in one piece and turbo'd it....1200hp just like that :lol:

Do you remember where you saw the 416 you mentioned?
"If you pick up a starving dog and make him prosperous, He will not bite you. This is the principal difference between a dog and a man"

Orr89rocz
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Re: LS3 Carbed build

Post by Orr89rocz » Fri Sep 06, 2019 4:48 pm

It was a grudge motor with top end/valvetrain done by bret bauer. Posted on a facebook group or page i think.

Now i havent researched it much but it was the best power i seen from oem casting ls3 head na

Elroy
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Re: LS3 Carbed build

Post by Elroy » Mon Sep 09, 2019 11:28 am


CGT
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Re: LS3 Carbed build

Post by CGT » Wed Sep 11, 2019 11:54 am

That's a very comprehensive test. It appears to me they were experiencing some dyno issues but either didn't know it, or didn't write about it. If an engine I had been dynoing a day or two suddenly picked up 15ftlbs or so...I'd be questioning something besides ring seal.

Anyway all the numbers in general seem optimistic, but the fact that they did that much testing, and tried to keep things controlled is really cool. Its at least interesting to see the different manifolds effect on the shape of the power curves regardless of numbers. I also like that the CID manifold did so well....since I happen to own one :lol: . Very interesting article for sure.
"If you pick up a starving dog and make him prosperous, He will not bite you. This is the principal difference between a dog and a man"

midnightbluS10
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Re: LS3 Carbed build

Post by midnightbluS10 » Wed Sep 11, 2019 4:47 pm

CGT wrote:
Fri Sep 06, 2019 4:11 pm
Orr89rocz wrote:
Fri Sep 06, 2019 12:41 pm
Believe i seen a 416 stroked ls3 with ported ls3 heads make 812 hp with cid intake. Solid roller 7800 rpm
I mean its definitely possible for sure. A 15° sbc would easily smoke a 15° LS, but for using factory heads....how can you complain. Its fun seeing what you can get out of O.E stuff, I've tried to keep as much of it as possible, at least at first. I recently saw a 402 LS carbed with 243 cathedrals on the dyno I frequently use and I was really impressed by it.

Hell if you just listen to the internet. I shouldn't have wasted all my time. I should have just left it in one piece and turbo'd it....1200hp just like that :lol:

Do you remember where you saw the 416 you mentioned?
It ought to be more than 1200 lol. They made that with a 4.8L
JC -

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Re: LS3 Carbed build

Post by CGT » Thu Sep 12, 2019 9:20 am

midnightbluS10 wrote:
Wed Sep 11, 2019 4:47 pm
It ought to be more than 1200 lol. They made that with a 4.8L
Oh that's right! So...1200/4.8=250hp per litre. 250*6.2=1550 internet hp per litre.
"If you pick up a starving dog and make him prosperous, He will not bite you. This is the principal difference between a dog and a man"

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