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Need Help!!

This is a discussion on Need Help!! within the General Help forums, part of the LSx Technical Help Section category; I am trying to buy new fuel injectors and i am unsure on what fits in the ls1 cars. I ...

  1. #1
    Junior Member SOMTRANSAM's Avatar
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    Sunset Orange Metallic
    2001 Trans Am

    Need Help!!

    I am trying to buy new fuel injectors and i am unsure on what fits in the ls1 cars. I want to get a good set of like 36lb or 42lb injectors. i was thinking of just buying the stock cobra injectors but i do not know if it fits.

    who knows something i dont =)

  2. #2
    Smiles for 9.5 Years cammed goat's Avatar
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    Check our sponsors for reference. Can't hurt.

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    Moderator 98TransAmWs-6's Avatar
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    98 TA WS6/ 01 C5 Corvette

    I have a set of 60s that will fit if interested, although depending on your mods that may be too much.
    1998 Trans Am WS6 - Phantom
    421 CI LQ9, Tick Performance Custom Cam, TFS 255cc LS3 heads, Kooks 2" LT headers, Kooks 3" True Duals w/ high flow cats, FTP 104 lid, Speed Density Tune, 4" silicon tube, LS6 VCT, FAST 102 Intake, NW 102 TB, Oil Catch Can, SLP Bilstein Shocks w/ Vogtland Springs, CTS-V 4-piston Calipers w/C6 Z06 rotors, Stainless Steel Brake Lines, R1 concepts premium rotors, Hawk HP+ brake pads, VFN WSQ Hood, C5-R timing chain, SLP oil pump, E85 tune, Walbro 450 fuel pump, Deatschwerkz 95# injectors, Breathless performance headlights, Frost Tune, !HVAC.
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    Spaz is My Mentor SMWS6TA's Avatar
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    98 T/A w/a little mods...

    ^^
    I was going to ask what mods were for that high of an injector.

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    Moderator 35th-ANV-SS's Avatar
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    Definitely need to know your mods. Stock injectors are only 28lbs.
    It's on jackstands.

  6. #6
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    Definitely need to know your mods. Stock injectors are only 28lbs.
    this...

  7. #7
    Moderator 98TransAmWs-6's Avatar
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    98 TA WS6/ 01 C5 Corvette

    Unless you are running a power adder you shouldn't need anything over 36. Frost told me that for most head/cam you don't need over 32. So like I said unless you have a power adder I can see the 42 being too much.

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    Moderator 35th-ANV-SS's Avatar
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    Correct. Bigger is not better in this instance unless you have aftermarket parts requiring more fuel delivery, which usually also means a larger fuel pump too.

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    Former Mopar Man 2002ssslp's Avatar
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    Unless you have a power adder and a cam / heads the 36lb injectors will work without a pump change. If you are below 425 rwhp you can use the 28's or 36's with the stock fuel delivery system
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

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    Junior Member SOMTRANSAM's Avatar
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    Sunset Orange Metallic
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    thanks for the responses guys.. i am running a cam only right now with full exhaust and a stall. i thought the stock injector size was 24lbs but i could be wrong. im thinking of picking up a stock set of cobra injectors which is like 36lbs. i just want to make sure they fit. im also going to go with a bigger maf like 85 to 88mm

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    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    Your motor wouldn't run on 24lb injectors. Stock are always 28lbs unless you have a 99 which are 26lbs.


    Why are you messing with the MAF? The stock MAF is very good and is able to handle up to mid 500's even with power adders.

    Whatever you do don't go the SLP MAF route. You'll regret it. At best your tuner will love/hate you. Hate you for the time it takes to tune it and love you because the cost pr hr he's charging you.

  12. #12
    Junior Member SOMTRANSAM's Avatar
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    Sunset Orange Metallic
    2001 Trans Am

    my car runs very sluggish and i have thrown a code in the past for the maf. im not sure which one it was either po107 or po106 i forgot but im thinking of getting a bigger one so my car will breathe better and it might be worth it in the long run. I was thinking of going granatelli, ive heard very good things about them

  13. #13
    Moderator 35th-ANV-SS's Avatar
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    Try cleaning it with CRC MAF cleaner first. If it is indeed bad, I'd replace it with another OEM GM unit.

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    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    Are you using a K&N air filter?


    If so your problem is that the oil from the filter is dirtying your sensor. Like Jon posted use CRC MAF cleaner and see if that helps.


    Also drop the K&N filter and go back to paper.

  15. #15
    Junior Member SOMTRANSAM's Avatar
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    Sunset Orange Metallic
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    i am using the volant twin breather intake and yeah there two cone filters. ill try going back to the regular lid with paper filter and let you guys know how it goes!

  16. #16
    Moderator 98TransAmWs-6's Avatar
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    98 TA WS6/ 01 C5 Corvette

    I would get a SD tune and dump the MAF before getting a bigger MAF personally. That way you can run a 4" coupler from the lid to TB if your lid and TB are that size.
    Smittro likes this.

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