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Looking at buying heads

This is a discussion on Looking at buying heads within the Internal Engine forums, part of the LSx Technical Help Section category; Should i go with the 241s or start looking for something different? Im looking for a set to start building ...

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    Stockitie Stock Stock 95camaroZNC's Avatar
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    Looking at buying heads

    Should i go with the 241s or start looking for something different? Im looking for a set to start building on for when i put my cam in, that why i just have to swap to the already built set of heads and drop the cam in. Just looking for 500 ish HP on a A4 car. Any advice would be nice.

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    Junior Member chocos_ls1's Avatar
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    Quote Originally Posted by 95camaroZNC View Post
    Should i go with the 241s or start looking for something different? Im looking for a set to start building on for when i put my cam in, that why i just have to swap to the already built set of heads and drop the cam in. Just looking for 500 ish HP on a A4 car. Any advice would be nice.
    il say go with sum 243(ls6 heads) and port them out i mean u can find them cheap and theyl be an upgrade,241 are alil better than ur year but i mean theyl be about the same price

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    Junior Member chocos_ls1's Avatar
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    to double check u have the trans am or the camaro in the pic?

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    Member TACE02's Avatar
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    ASC #753
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    Quote Originally Posted by 95camaroZNC View Post
    Should i go with the 241s or start looking for something different? Im looking for a set to start building on for when i put my cam in, that why i just have to swap to the already built set of heads and drop the cam in. Just looking for 500 ish HP on a A4 car. Any advice would be nice.

    You talking flywheel HP or RWHP??? what kind of setup are you looking at doing to reach your goal?

    I agree, for the same price go for the 243s CNC'd. But if you have the money, buy a good set of "known brand" heads. Cheap heads are cheap for a reason...

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    Stockitie Stock Stock 95camaroZNC's Avatar
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    Yeah its a 99 Trans am, and i found the 241s for 30 bucks + shipping. Thats why im asking lol. But whats the best thing i should do since im doing all this work myself, probably wont be buying name brand ones. Im looking to get as close as i can can RWHP and a stall.

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    Junior Member chocos_ls1's Avatar
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    Quote Originally Posted by 95camaroZNC View Post
    Yeah its a 99 Trans am, and i found the 241s for 30 bucks + shipping. Thats why im asking lol. But whats the best thing i should do since im doing all this work myself, probably wont be buying name brand ones. Im looking to get as close as i can can RWHP and a stall.
    30 bucks? are u sure theres nun wrong with them? cuz damn thats a steal i mean if u got times in ur hands do it but if u dnt il go with 243s but again thats me

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    Stockitie Stock Stock 95camaroZNC's Avatar
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    Yeah i got plenty of time, plan to buy them then start building them up. However i want the best thing i can pick up on the cheap like this, whats the benefit the other heads have over the 241 heads?
    Last edited by 95camaroZNC; 06-01-2010 at 11:50 PM.

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    243s will get you 20 hp more unported.look at some cnc TSP heads,or trick flow 220cc cast heads.

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    You won't get near 500 rwhp with 241's and especially with an A4.
    I have CNC'd 243 heads and a 228/232 cam, LS6 intake, LT's and borla on a 99 A4 and dynoed at 392 on a load bearing with 20x10 rear wheels (~420-430 rwhp on a dynojet). I know my wheels cost me a few hp, but I am no where near 500 rwhp.
    Just added a ported 92, but haven't gotten to dyno it yet.

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    Stockitie Stock Stock 95camaroZNC's Avatar
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    Just going for as close as i can get, 450 would be more then fine. Gonna throw Nitrous at it anyway.

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    Oh, well with nitrous, it would be possible. But for N/A, 450rwhp is the limit where most ppl start having issues with the rear-end going out from what I have seen. Of course you can hit that 500 mark with enough money and the proper build, but that would involve dropping some serious money on name brand heads, as well as all the other necessary supporting upgrades (which should be done on any H&C car really).
    Also a stalled A4 will make low numbers on a dyno, but can hold its own on the track/street.

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    Stockitie Stock Stock 95camaroZNC's Avatar
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    Would a set of 5.3 heads be the same as the 241s? Im pretty sure they arent but not 100%. guy wants 30 bucks for them and im thinking of picking them up. Are they worth doing the work on to swap on the car or again should i just find 243's and stop trying to be a cheap ass.
    Last edited by 95camaroZNC; 07-01-2010 at 11:11 PM.

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    I don't sell out! blackSS01's Avatar
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    243's if complete have Sodium filled intake valves and hollow exhaust valves which shave valvetrain weight. They flow better out the box and up the compression. I would go with at least 243's and work them a bit. Thats just my .02
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    Not all 243's are equipped with sodium filled valves. Earliest z06's and gto's.

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    I don't sell out! blackSS01's Avatar
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    Not sure if GTO heads came with them Thought just Z06's. You can tell the difference by the yellow valve springs.

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    Quote Originally Posted by c5z28 View Post
    Not all 243's are equipped with sodium filled valves. Earliest z06's and gto's.
    im about 99% sure gto's did not have the lightweight valves

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    to the OP let me set something straight about the F-body oem heads...........there is not shit difference in their flow numbers and such. they are all basically the same. with the big exception of the 806s as they are perimeter style. There are obviously small changes done between the 806, 853s and the 241..but trust me nothing worth a damn to show up on the dyno, or enough to warrant a change

    here is some food for thought

    806
    Combustion Chamber Volume: 66.67cc
    Intake Port Volume: 200cc
    Exhaust Port Volume: 70cc
    Intake Valve Diameter: 2.00 inches
    Exhaust Valve Diameter: 1.55 inches

    LS1 (Center Bolt)
    99-00 5.7L Passenger Car and Corvette (853)
    01+ 5.7L Passenger Car and Corvette (241)
    Material: Aluminum
    Combustion Chamber Volume: 66.67cc
    Intake Port Volume: 200cc
    Exhaust Port Volume: 70cc
    Intake Valve Diameter: 2.00 inches
    Exhaust Valve Diameter: 1.55 inches

    Casting Number 243
    LS6
    01+ 5.7L Corvette
    Material: Aluminum
    Combustion Chamber Volume: 64.45cc
    Intake Port Volume: 210cc
    Exhaust Port Volume: 75cc
    Intake Valve Diameter: 2.00 inches
    Exhaust Valve Diameter: 1.55 inches

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    your parts guy!!! 1fastcamarosss11's Avatar
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    i have a set of slp stage 2, 806 stamp cnc ported and polished 750 plus shipping. pm me if interested.

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    Member c5z28's Avatar
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    Quote Originally Posted by shady milkman View Post
    im about 99% sure gto's did not have the lightweight valves
    That's what I was saying the first z06's and all gto's did not have them,
    fuck leave out a word and no one can put together 2+2=5

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    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by c5z28 View Post
    That's what I was saying the first z06's and all gto's did not have them,
    fuck leave out a word and no one can put together 2+2=5
    One word can mean the difference between peace and war! Its all good tho, we still love ya

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