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500 rwhp

This is a discussion on 500 rwhp within the Internal Engine forums, part of the LSx Technical Help Section category; so ive grown tired of my 383. I want to be in the 500 rwhp club. im wanting to build ...

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    Member 383ls6's Avatar
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    red
    2002 z/28

    500 rwhp

    so ive grown tired of my 383. I want to be in the 500 rwhp club. im wanting to build a N/A 441 cid with AFR 245 cc heads. Is it possible to go 500 rwhp with this engine with all supporting mods?
    Last edited by 383ls6; 03-24-2013 at 07:09 PM.

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    How are you not near 500whp with the 383? Do you have ported heads? What cam are you running?

    To answer your question, my N/A 427 LS3 is nearing the 600whp mark (I'll find out in April when I get tuned for my ported intake and 2" headers), so you should be good with the 441 if you don't completely cheap out on parts.

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    Junior Member TcMcD86's Avatar
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    ^^ I agree. What cam are you using? 500 is attainable with the 346 with the right combo, you should be able to get there relatively easily with the 383. You can spend the money and do a motor swap if that is really what you want to do. If so, do it and you'll love it. If you want to save money then hit up Advanced Induction. Send in your #243's and they will work their magic, get your cam section dialed in, and you should nail it. Is there a build thread for this 383 anywhere?

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    Member 383ls6's Avatar
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    its a fully built 383 all callies with afr heads. putting down 440 rwhp and 420 tq. with an ASA cam with 1.8:1 rockers. kooks headers and 4"mufflex. 92 fast with 92 nick williams TB. havent lost a street race yet but.... I've got a fever, and the only prescription is more horsepower.. lmao.was disappointed not to hit 500 and couldve made a better choice in cams but there is no substitute for more cubic inches. that is also through a fully built A4 with a 3k yank. im guessing flywheel hp to be around 520
    Last edited by 383ls6; 03-25-2013 at 03:57 AM.

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    Member 383ls6's Avatar
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    Quote Originally Posted by ls1camino View Post
    How are you not near 500whp with the 383? Do you have ported heads? What cam are you running?

    To answer your question, my N/A 427 LS3 is nearing the 600whp mark (I'll find out in April when I get tuned for my ported intake and 2" headers), so you should be good with the 441 if you don't completely cheap out on parts.
    600whp would be fantastic im leaning towards an ls7 the ls3 have better heads i think. rectangle versus cathredral ports.
    Last edited by 383ls6; 03-25-2013 at 03:49 AM.

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    Quote Originally Posted by 383ls6 View Post
    its a fully built 383 all callies with afr heads. putting down 440 rwhp and 420 tq. with an ASA cam with 1.8:1 rockers. kooks headers and 4"mufflex. 92 fast with 92 nick williams TB. havent lost a street race yet but.... I've got a fever, and the only prescription is more horsepower.. lmao.was disappointed not to hit 500 and couldve made a better choice in cams but there is no substitute for more cubic inches. that is also through a fully built A4 with a 3k yank. im guessing flywheel hp to be around 520
    I put down better numbers with my Heads/Cam/Intake 346ci LS1. I think you need to get a better cam (maybe a custom grind). How big are the headers? Ever think about selling the FAST92 and buying a FAST102? What AFR heads? The 205cc heads are not enough for that motor if that's what you've got.

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    Member 383ls6's Avatar
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    Quote Originally Posted by ls1camino View Post
    I put down better numbers with my Heads/Cam/Intake 346ci LS1. I think you need to get a better cam (maybe a custom grind). How big are the headers? Ever think about selling the FAST92 and buying a FAST102? What AFR heads? The 205cc heads are not enough for that motor if that's what you've got.
    1 7/8 headers. can i get a 102 with a cable operated tb? 210cc recommended by AFR in fact called and told them my setup and they machined a pair for me.took like a month to get them. my car is a DD. the few tuners i spoke with said thats about max hp and tq.?? what did you put down? are you on the dyno listing here
    Last edited by 383ls6; 03-25-2013 at 09:39 AM.

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    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by 383ls6 View Post
    Quote Originally Posted by ls1camino View Post
    I put down better numbers with my Heads/Cam/Intake 346ci LS1. I think you need to get a better cam (maybe a custom grind). How big are the headers? Ever think about selling the FAST92 and buying a FAST102? What AFR heads? The 205cc heads are not enough for that motor if that's what you've got.
    1 7/8 headers. can i get a 102 with a cable operated tb? 210cc recommended by AFR in fact called and told them my setup and they machined a pair for me.took like a month to get them. my car is a DD. the few tuners i spoke with said thats about max hp and tq.?? what did you put down? are you on the dyno listing here
    Yes, that is what I have. I have the the NW 102 that is cable operated to go with my FAST 102. Here is a picture of it.

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    now that is sexy. ^^

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    Quote Originally Posted by 383ls6 View Post
    1 7/8 headers. can i get a 102 with a cable operated tb? 210cc recommended by AFR in fact called and told them my setup and they machined a pair for me.took like a month to get them. my car is a DD. the few tuners i spoke with said thats about max hp and tq.?? what did you put down? are you on the dyno listing here
    I put down 345/395 through a M6 and Moser 9". I don't think I'm in whatever official sticky is floating around here.

    What cam are you running? Do you have the specs? Something is holding you back.

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    Member jonnyman's Avatar
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    you should be definitely over 500rwhp, I've been running 235 trick flow heads, 102 fast TB and intake, on a 427 ls3 with a very small cam at 507 rwhp

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    Wow...typo...I meant 445/395 with my H/C/I LS1.

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    ^ I was going to say I am over that with bolt-ons and my 243 heads.

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    Quote Originally Posted by ls1camino View Post
    Wow...typo...I meant 445/395 with my H/C/I LS1.
    I was also going to say that you were nowhere near his numbers until you corrected yourself.

    Agree with everyone else here. Something seems fishy.

    My LS1 made 540rwhp with stock cam and stock heads

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    Senior Member redbird555's Avatar
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    Quote Originally Posted by 383ls6 View Post
    1 7/8 headers. can i get a 102 with a cable operated tb? 210cc recommended by AFR in fact called and told them my setup and they machined a pair for me.took like a month to get them. my car is a DD. the few tuners i spoke with said thats about max hp and tq.?? what did you put down? are you on the dyno listing here
    The tuners are wrong lol . A 383 should be knocking on 500whp with torque not too far behind. The cam you have is way too small in both lift and duration.

    First thing I would do is call Tony Mamo at AFR and go over your setup and tell him what your goals are. He can recommend you a cam to go with the heads HE DESIGNED. The asa cam doesnt make good power even on a 346, just torque it has very low lift and heavily favors the exhaust side. This simply doesnt match a set of afrs that have very high velocity and good flowing ports on both sides which will come alive with more lift and duration. I'd bet with just a cam swap to an appropriate sized one you would make 475/460.

    Tony may also suggest having the 210's ported if you havent already, he does a gelluva job and no doubt could meet your goal. At this point you could upgrade to a FAST 102 but honestly I really dont know how much it would help over the 102. Overall even with having the heads ported and doing a new cam you would be well under the budget of getting a 441 and still make your goal. If you wanted 600whp NA then I would say 441 is the way to go.

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    Quote Originally Posted by 35th-ANV-SS View Post

    Agree with everyone else here. Something seems fishy.

    My LS1 made 540rwhp with stock cam and stock heads
    That procharger doesn't have anything to do with that does it ?

    I also agree with what redbird said. The setup I will be getting from Vengeance Racing will net really close if not a tad over 500rwhp on a 346. The cam suggested is a 240/244 .598/.605 112 with TFS 215s and a FAST 102. So with your 383 I would definitely get a bigger cam for sure and get those AFRs ported like previously suggested. You do need a bigger stall though, more like a 4k.
    Last edited by 98TransAmWs-6; 03-26-2013 at 07:46 AM.

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    Moderator Firebirdjones's Avatar
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    Don't get all that hung up on dyno numbers. It's just a tuning tool but people treat it as a chest pounder. Peak numbers really don't mean much on a street car if it has nothing throughout the curve, unless you don't mind some steep rear gears to keep it happy.

    Your auto is going to soak up some of it as well, which will mask the cars true potential. What it runs down the track is what counts.

    The converter is a tad on the small side in my opinion, and that ASA camshaft is also very small. The cam is what is holding the car back, and actually your numbers are stout considering the mild cam. The heads and intake are doing a good job

    I'd be willing to bet a properly ground camshaft for that combo would net another 30 HP easily and put you very close to your goal. Couple that with a higher stall and the rest of the car setup properly and it would be a very quick street car that should easily run bottom 11's if not quicker, and should very well be close to that now anyway.

    With that said I hope you're also ready to add some NHRA safety equipment such as a mild 4-6 point bar and 5 point harness to name a few, otherwise you'll be one and done if the track is picky about equipment.
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    Member 383ls6's Avatar
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    ok i want to try a different cam first but here is the catch. I want to keep my stall, the car is a daily driver in stop n go traffic, i want to keep my 1.8 rockers and i want the cam to have a broad powerband . the heads are ported and polished and max lift is .650. what would yall recommend?

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    Email Patrick Guera (Pat G...Google is your friend) and have him make you a custom cam for your setup.

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    Moderator Firebirdjones's Avatar
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    Ouch. That really limits your choices. It really needs more stall as it sits to optimize it, a larger cam is only going to multiply the issue.

    A daily driver friendly stall is really a relative term that's different for everyone. I run a 3400 with no camshaft at all in one of my 4th gens and love it, perfectly fine daily driven. With the lockup feature I never gave it a second thought, personally I wouldn't stall one any less and would actually recommend slightly higher.
    If you have a stall built for the combo (which is what I'd recommend) they can also taylor the STR which in a nutshell affects how hard it hits, and can make a difference in how well it drives around. Some drive around tighter than others but will flash where you need it.

    Frankly, and this probably isn't what you want to hear, if you want to keep the broad power band you have, don't want more stall, and probably don't want more gear either, then I'd just leave the car alone as is and enjoy it because you already have all these things. Don't get hung up on the RWHP syndrome.
    What you have should already be good for mid 11's or something close to roll bar requirement.

    If you're dead set on a camshaft, have one custom made is the best route, give AFR a call. I can tell you though, that stall is going to be a limiting factor they'll have to work around if anyone is to suggest a custom grind for it.

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