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550+ rw streetable hp out of a 383 ls1 N/A ?

This is a discussion on 550+ rw streetable hp out of a 383 ls1 N/A ? within the Internal Engine forums, part of the LSx Technical Help Section category; I have a 2001 corvette that is gonna start to under go hopefully a nice change this winter. Im looking ...

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    550+ rw streetable hp out of a 383 ls1 N/A ?

    I have a 2001 corvette that is gonna start to under go hopefully a nice change this winter. Im looking to do a fully built 383 ls1 all motor car and would like to try and get a streetable 550 ish streetable rwhp. Is that even possible? If so what would you guys recommend as far as heads, cam, stroker kit, rockers ect? My budget for parts is around $8-9k and dont need a block as i have a perfect one already. Any help is greatly appreciated.

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    Member c5z28's Avatar
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    550rwhp is 402 territory, even then most 402's will make low 500rwhp. There have been instances however where people have gotten 500rwhp out of the 346 and there is a write up by Patrick G who did. Search "Recipe for 500rwhp with 346". If you stick with the stock cu" expect 450rwhp luck and with a 383 anything tickling 500rwhp lucky. I would forge the motor you have leaving the stroke alone and get a s/c, 550 rwhp with heads and cam would be attainable with your current block that way.
    Lastly E.T should be a goal over hp, as your suspension will have a lot to do with making the car fast as a whole.
    Last edited by c5z28; 10-24-2010 at 11:18 AM.

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    Member 35thz28camaro's Avatar
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    thunder racing built a 383 with trick flow heads that made 53xrwhp

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    Quote Originally Posted by 35thz28camaro View Post
    thunder racing built a 383 with trick flow heads that made 53xrwhp
    I did a search and found it! 537hp and 488tq at the wheels, I would be totally happy with that and i think im going to basically copy the setup but will improve on it if i can .

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    Slow'er'Ass Mr. Luos's Avatar
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    Going to need more than 402/408 to have streetable and reliable 550RWHP.

    That is 427 and up territory.
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    Quote Originally Posted by djdilliodon View Post
    I did a search and found it! 537hp and 488tq at the wheels, I would be totally happy with that and i think im going to basically copy the setup but will improve on it if i can .
    link? that would be awesome. not that i'll ever be able to afford it, but it would be a nice read.

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    Auto Painter RyanJM's Avatar
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    A fully forged 346 should allow you to run a procharger at a higher psi and a cam and get you over the 500hp mark. Of.course a good.set of ported heads would help.
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    Quote Originally Posted by RyanJM View Post
    A fully forged 346 should allow you to run a procharger at a higher psi and a cam and get you over the 500hp mark. Of.course a good.set of ported heads would help.
    550-600rwhp is easy and will hold up with good tuning on a stock bottom end for the daily... A forged bottom end and the right parts will do >750+.

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    Quote Originally Posted by RyanJM View Post
    A fully forged 346 should allow you to run a procharger at a higher psi and a cam and get you over the 500hp mark. Of.course a good.set of ported heads would help.
    If i was to go with a supercharger i would most likely opt for the A&A kit. I've seen many dyno sheets with that kit and it makes excellent power. I guess doing the bottom end and freshining up the rest with that kit may be a better bet. Decisions, decisions, decisions

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    Member 35thz28camaro's Avatar
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    [QUOTE=Homer J;2477524]link? that would be awesome. not that i'll ever be able to afford it, but it would be a nice read.[/QUOTE


    http://www.ls1tech.com/forums/dynamo...unleashed.html

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    Maybe the guy from that thread would sell his 383 seeing as how the car got wrecked...

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    Quote Originally Posted by Frost View Post
    550-600rwhp is easy and will hold up with good tuning on a stock bottom end for the daily... A forged bottom end and the right parts will do >750+.
    I am the type to build something once and I trusted forged parts better than stock just for long term reliability of course not everyone drives there car like me. I enjoy beating on my car and plan to forge my 346 for a 200 shot.

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    From what I have been seeing on a lot of cats lately are turbo setups and they seem to be building good power and also prices dropping on the kits.

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    You could do texas speeds setup they won the LSX shoot out with a 9.62 1/4 mile time and with stock bottom end with just heads, cam, 90/90 intake made somewhere 650 hp at the flywheel so even If you lose a hundred through the driveline your still putting down 550 hp at the wheels thats the setup I just bought but I just can't afford to put it in yet
    :-( "& now I'm sad" i need at least 2k to put it in and get three dyno pulls


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    550 might be a bit hard. I would be more than happy with high 400's and even 500 with a N/A built 383. Why not throw in a small shot of juice??
    "Life is to short to drive a slow car"

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    Quote Originally Posted by Eganslp View Post
    You could do texas speeds setup they won the LSX shoot out with a 9.62 1/4 mile time and with stock bottom end with just heads, cam, 90/90 intake made somewhere 650 hp at the flywheel so even If you lose a hundred through the driveline your still putting down 550 hp at the wheels thats the setup I just bought but I just can't afford to put it in yet
    :-( "& now I'm sad" i need at least 2k to put it in and get three dyno pulls


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    That is a full out drag car.

    Not saying it can't be done....but that completely rules out 'streetable' in my opinion.
    650 flywheel likely doesn't equal 550RWHP running through the drivetrain to handle that power either.

    Congrats to TSP though!! Impressive for stock bottom end. I would love to know ALL of the specs on the car though. Any flycutting?? Compression? Gear?

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    Quote Originally Posted by Mr. Luos View Post

    Congrats to TSP though!! Impressive for stock bottom end. I would love to know ALL of the specs on the car though. Any flycutting?? Compression? Gear?
    what are the odds of them REALLY tells us the truth lol

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    Since they already won the thing this year, and know that next year they'll need to do better than this, I suspect they'd be willing to let that info go. I mean they are in the business of selling car performance, and what better way to do that than kick everyone's ass on the racetrack, and then sell the bejeezus out of the winning combination?

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    Quote Originally Posted by gashkerwin View Post
    Since they already won the thing this year, and know that next year they'll need to do better than this, I suspect they'd be willing to let that info go. I mean they are in the business of selling car performance, and what better way to do that than kick everyone's ass on the racetrack, and then sell the bejeezus out of the winning combination?
    true...but there are those companys that wont tell you the truth OF real setup they where running...this happens alot in the "ford" world

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    Quote Originally Posted by Blackbird-WS6 View Post
    true...but there are those companys that wont tell you the truth OF real setup they where running...this happens alot in the "ford" world
    they have to lie because they can't do the kind of things to their engines with stock bottoms like we can lol

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