Thread: thinking about a northstar TB

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  1. #1 thinking about a northstar TB 
    GT Level Member jdmgtp's Avatar
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    Wondering if a northstar would be worth it on my setup. I already ported my throttle body but obviously I'm restricted by diameter. I already ported my blower and I'm running a 3.2 pulley.
    2000 GTP, 3.2 pulley, SD headers, 3" exhaust, modded 1.9's, custom CAI, LS6 maf, ported blower/ TB, HPT, 65 lb injectors, E85 in the summer, LM-1 wideband, 180 stat, autolite 104's, GMHD suspension kit. 13.2@104 on street tires w/o ported s/c
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    Turbo is the way to go. REDCRAPGP's Avatar
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    Well considering most won't outflow the stock TB I say no..but ill let other chime in as well.
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  3. #3 Re: thinking about a northstar TB 
    GT Level Member jdmgtp's Avatar
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    Quote Originally Posted by REDCOMPG View Post
    Well considering most won't outflow the stock TB I say no..but ill let other chime in as well.
    really? where did you hear that?
    2000 GTP, 3.2 pulley, SD headers, 3" exhaust, modded 1.9's, custom CAI, LS6 maf, ported blower/ TB, HPT, 65 lb injectors, E85 in the summer, LM-1 wideband, 180 stat, autolite 104's, GMHD suspension kit. 13.2@104 on street tires w/o ported s/c
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    Turbo is the way to go. REDCRAPGP's Avatar
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    I seem to see that back on the forums some time ago..I could be referring to something different don't recall for certain though its been awhile. That's why I figured the more season vets like Blue,Bio,Bill and Matt would chime in later and correct me if in wrong
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  5. #5 Re: thinking about a northstar TB 
    GTX Level Member asite57's Avatar
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    There's no way your out flowing a ported TB with that set up a North Star TB is not needed
    SOLD. 99 GTP - Open Cone, ZZP STB ,GMPP Front & Rear Sway Bar, 3" DP & Cat-Back, Built Trans, 12'' Brakes, Tune
    http://www.grandprixforums.net/gtp-t...ack-67489.html
    04 SRT4 - Bone Stock....For Now
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  6. #6 Re: thinking about a northstar TB 
    GrandPrix Junkie CTKGP09's Avatar
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    if your are going GenV, yes do a N*, not sure if you would notice any gains other than throttle response on a genIII...but thats still a gain
    '04 Chevy Silverado LT 4x4 - intake, headers, full exhaust, zo6 cam, 799 heads, tune, leveled, 33's
    '00 Grand Prix GTP DAYTONA 500 - L36 block, S1X, intercooled, GenV, N*, headers, full exhaust, coilovers, 5 speed swap, stage 3+ clutch
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  7. #7 Re: thinking about a northstar TB 
    GTX Level Member asite57's Avatar
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    You don't need a N* on a genV because of flow you need it because a l67 TB won't fit as far as flow is concerned even turbo guys use a ported l67 TB so to answer the OP original question no you don't need a N* TB and you probably won't see any gains just a different throttle feel
    SOLD. 99 GTP - Open Cone, ZZP STB ,GMPP Front & Rear Sway Bar, 3" DP & Cat-Back, Built Trans, 12'' Brakes, Tune
    http://www.grandprixforums.net/gtp-t...ack-67489.html
    04 SRT4 - Bone Stock....For Now
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  8. #8 Re: thinking about a northstar TB 
    GT Level Member jdmgtp's Avatar
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    Quote Originally Posted by asite57 View Post
    You don't need a N* on a genV because of flow you need it because a l67 TB won't fit as far as flow is concerned even turbo guys use a ported l67 TB so to answer the OP original question no you don't need a N* TB and you probably won't see any gains just a different throttle feel
    excellent, thanks for the response. Do you know this from personal experience?
    2000 GTP, 3.2 pulley, SD headers, 3" exhaust, modded 1.9's, custom CAI, LS6 maf, ported blower/ TB, HPT, 65 lb injectors, E85 in the summer, LM-1 wideband, 180 stat, autolite 104's, GMHD suspension kit. 13.2@104 on street tires w/o ported s/c
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  9. #9 Re: thinking about a northstar TB 
    GTX Level Member asite57's Avatar
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    No I just read read read and hang out/talk to people that have tried everything
    SOLD. 99 GTP - Open Cone, ZZP STB ,GMPP Front & Rear Sway Bar, 3" DP & Cat-Back, Built Trans, 12'' Brakes, Tune
    http://www.grandprixforums.net/gtp-t...ack-67489.html
    04 SRT4 - Bone Stock....For Now
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  10. #10 Re: thinking about a northstar TB 
    Turbo is the way to go. BillBoost37's Avatar
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    I've never researched the flow numbers between the two. That would be my suggestion and try to get an idea of how much you are flowing.

    As for the throttle response, it's there. N* has the tip in made for it. You start off and cruise nicely, go about 30% and you see the thing nearly wide open.
    I drink..so consider that when reading my posts.

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  11. #11 Re: thinking about a northstar TB 
    GT Level Member jdmgtp's Avatar
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    Quote Originally Posted by BillBoost37 View Post
    I've never researched the flow numbers between the two. That would be my suggestion and try to get an idea of how much you are flowing.

    As for the throttle response, it's there. N* has the tip in made for it. You start off and cruise nicely, go about 30% and you see the thing nearly wide open.
    Would my maf lbs/min at redline give you an idea of what I'm flowing?

    I noticed the throttle response on my friend's regal was as you describe, I thought it was from him playing with his BBV or just maybe because he has a full build. I'm not too worried about throttle response, I'd rather see WOT power gains. I figured since I'm running a 4" intake, 85mm maf and ported SC the stock TB would be the bottle neck but then again maybe not.
    2000 GTP, 3.2 pulley, SD headers, 3" exhaust, modded 1.9's, custom CAI, LS6 maf, ported blower/ TB, HPT, 65 lb injectors, E85 in the summer, LM-1 wideband, 180 stat, autolite 104's, GMHD suspension kit. 13.2@104 on street tires w/o ported s/c
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  12. #12 Re: thinking about a northstar TB 
    Turbo is the way to go. BillBoost37's Avatar
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    I would want to see them both put on a flow bench. Since yours is ported..it'll have some gain over stock. Maybe check ZZP's tech area, they do have a ton of interesting things they've done.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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