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A little help, head and cam question

This is a discussion on A little help, head and cam question within the Internal Engine forums, part of the LSx Technical Help Section category; Im not a real motorhead. I have a passion for cars, but I'm not a mechanic, I work in electronics. ...

  1. #1
    I heart JDM OutToWinPAHC's Avatar
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    Smokey Gray Metallic
    1991 Nissan 240sx LS6

    A little help, head and cam question

    Im not a real motorhead. I have a passion for cars, but I'm not a mechanic, I work in electronics.

    But I just got a good deal on a set of stock LS2 heads, 90mm Intake, injectors, fuel rails, and throttle body off a 2006 Corvette with 5.5K on it.

    Now I have a 2002 LS1 from a TransAm Ws6. Motor has 50k on it. I bought these looking to bump my power up some. I know the throttle body isn't going to work, but it was a package deal. Looking to get mine ported

    What would you suggest for a cam? I have a 3 speed TH350 with a B&M Shift kit, and 2800 stall converter. And a LSD with a 3.68 ring gear. Now the car is mostly show, but will be driven on weekends time to time. It's actually a Nissan 240sx. I dont want a super aggressive cam for the track, just something for my application.

    Other mods are dual 3.5 inch stainless exhaust, into Borla Xr's 3.5 in/out, no cats.
    MSD Fuel Pump
    Ported MAF


    Any suggestion would really help.

  2. #2
    I heart JDM OutToWinPAHC's Avatar
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    Smokey Gray Metallic
    1991 Nissan 240sx LS6

    I would like to get 400 RWHP. Think I will have to modify these heads to get there? Or with the proper cam, these heads, intake, injectors, rails, and dyno tuning get me to that number?

  3. #3
    Member 2001hawk's Avatar
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    Black & Black
    2001 Firehawk & 2002 WS-6

    First of all are the heads for the 240SX or for the T/A. Second the T/A has a 78mm throttle body while the LS2 is a 90mm throat. If you are planning on getting the 78mm throttle body ported and then using it on the 90mm intake you will be wasting time and money because that isn't going to work. The good news is they make a wiring adapter that hooks to the LS2 TB or you can go with the F.A.S.T., the Nick Williams, or one of the other companies. My 90mm TB came from P.T.M. and I really like it you can tell they spent a lot of time with it. Since I am not sure on which car this is going in I honestly couldn't tell you if the adapter would do you any good.

  4. #4
    I heart JDM OutToWinPAHC's Avatar
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    Smokey Gray Metallic
    1991 Nissan 240sx LS6

    Oh I plan on getting a new Throttle body. I said that i think. I actually ordered it earlier its a 105mm Aftermarket deal. But the car is a 240sx but thats only the body.

    I got a good deal on the LS2 Heads, 90mm intakes, throttle body, injectors and fuel rails. I will just sell the LS2 Throttle body.

    The engine is a LS1 from a 2002 WS6, I allready have the upgraded MAF
    Trans is a TH350 B&M Shiftkit with B&M 2800 Stall Converter

    Just dont wanna bolt all this stuff on without upgrading the cam. So my question was would you or whomever recommend for a cam.

    But as for the car all thas Nissan is the body and suspension

  5. #5
    Slower Than a 3rd Gen juiced99ws6's Avatar
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    Mystic Teal
    99 Trans Am & 01 CBR 929

    ok most people that have tested the 90 mm LS2 intake manifold have not shown much improvement over the LS6 intake manifold that you should already have if you have an 02 LS1 so I would suggest just keeping your stock LS6 manifold unless you are going to go all out and get a 90mm setup from FAST. Secondly the LS2 uses the same heads as an LS6 so you are basically just doing an LS6 swap and can still use your existing fuel rails, injectors, throttle body, and manifold and just sell the stuff you just bought and you can use the heads. Now if they are stock heads you will have to buy yourself new valve springs and retainers as well as new pushrods to compensate for the cam that you want. That stall converter isnt very big however so I dont think I would go with a cam much larger than a 224/ 224 with maybe a 580 lift and 114 lsa. That setup may or may not see the 400rwhp mark but if you wanna squeeze some extra power out of it you can have the heads shaved down a bit for some added compression and have them port and polished if you have a good machine shop around there. If you have the heads machined and get a 224 cam you should see 400rwhp. Either that or get a bigger stall converter and bigger cam.

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    Slower Than a 3rd Gen juiced99ws6's Avatar
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    Mystic Teal
    99 Trans Am & 01 CBR 929

    BTW, bad ass project man and I wish you the best of luck with it

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    I heart JDM OutToWinPAHC's Avatar
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    Smokey Gray Metallic
    1991 Nissan 240sx LS6

    Thanks by the way I only paid 450 bucks for the LS2 heads, Intake, throttle body, fuel rails, and injectors. Which I wanna say are 36# injectors, The stock LS1's are what 28#. Yeah I am limited with the converter, because of the LS1 / Th350 setup. I was looking for something like a 3500 stall but my options were limited. So a 580 lift. I saw a 608 lift, but it seemed like a bit much. Do you know what the LS2 stock cam is? Is it the same as the LS6? If so I will just go that route and exspect the results that the LS6 had

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    red
    73 Z28

    Hey, I work in electronics but have been a car freak for longer than I'd like to admit.(hint-I can work on tubes)
    One possible problem area, that TH350 is really iffy over 350 HP even well prepped. The engine you have is a monster to begin with and you might consider putting some coin into a prepped AOD. The new ones will take a ton of HP if done right and you might just need it...later on. I've seen a lot of the 01-2 LS1's stuck on a dyno with headers hitting 400 HP. Heads and a cam can put you over 500. You might consider a Z06 cam but I understand push rods and springs are more of a consideration.
    You should just try it stock first, I think it's going to scare you. I have a 01 WS6 and that is absolutely the best engine ever. Just got my first highway miles in. 6th was no problem on the biggest hills and I could even pass in 6th. To Spokane and back on half a tank...30 mpg. It matched the best mileage of my '67 400, around town.

  9. #9
    I heart JDM OutToWinPAHC's Avatar
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    Smokey Gray Metallic
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    Yeah. Well originally I was going to use a Small Block 400, but I went with this LS1 instead and kept the Gen1 for another project. The transmission is from Mad dog transmission. It’s called the TH350 Punisher and ran me a pretty penny. 1300 to be exact, but it’s supposed to take 600 horse with no issues, But with this car here. Since I already had this brand new Trans sitting here I used it. When it goes I will end up going with a T56.

    The cars been ran once on the stock rear, and all it did was sit and smoke. Since then I have put a Cusco LSD rear in. It’s a Nissan pumpkin, I wanted to retain the independent suspension. It’s the rear they use in those skylines, some making 800 horses. I think ill be ok there now, and actually grab.

    I am moving back to PA soon. I used to deal with K&M Speed and Nickerson Performance out there. Ill see what they suggest for a cam. Probably the LS6 Z06 cam is the route ill take. With the LS2 heads, 90mm intake, 105mm TB, and injectors.

    Tubes lol, yeah a bit older then me. I know my IGBT's

  10. #10
    Member 2001hawk's Avatar
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    Black & Black
    2001 Firehawk & 2002 WS-6

    LOL don't mind me. First time I read through it I thought you were talking about two separate cars, but now that I read it again the 02 WS-6 was the donor car. Since I was thinking you were talking about two cars I wasn't even going to bother with the cam issue. I think you are going to want more than the Z06 cam. Also anything over 90mm for the TB is going to be overkill.

  11. #11
    Slower Than a 3rd Gen juiced99ws6's Avatar
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    Mystic Teal
    99 Trans Am & 01 CBR 929

    the ls2 cam is the same cam that was in the 01 LS6, I would not waste my time with that cam though since you can get a cam much worth your while for around 300$ actually pm me and I can send you the name of the place I bought my cam from for only 230$ they are not a sponser however so I cannot post it

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