Thread: Want to make my '04 impala ss faster

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  1. #1 Want to make my '04 impala ss faster 
    GXP Level Member ryangtp89's Avatar
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    I have been out of the modding L67's curcuit for 5 or so years now, Soo i lost most of my knowledge. Anyways i want to do just a few things to it nothing major, as this is my daily and i have a H/C/I '98 camaro to get my need for speed on. I was thinking of doing a cai, smaller pulley and exhuast and mail in tune. Now i hate the sound of a full exhuast v6(headers, downpipe, catback) Soo i guess i can get away with eaither doing a 3inch downpipe or some cheap headers and keep the stock exhaust. I was thinking doing a 3inch catted downpipe stock manifolds and call it good ? maybe a 3.5" pulley instead of a 3.4 to be on the safe side ? and i'm thinking a fwi this time ? which is the best one to get ? (fit, quailty, actual hp gain) and does zzp still do good mail in pcm tunes ? and of course some autolite 605's ? How does that all sound ? Has all my knowledge fade away ?
    SLP headers, Wizaird cai, zzp1.0pcm ,slp powerflo catback, 3.4mps, NGK TR55's, 180*, zzp stage 1 hv tb,tb spacer, tb heatshield, Triple Edge Performance High performance Tranny, flipped motor mounts, spring blockers, prj 10.4mm wires, Sloted rotors & Ceramic brake pads,Alternator Voltage Booster. zzp 1.9 rockers & 105# springs
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  2. #2 Re: Want to make my '04 impala ss faster 
    GXP Level Member GTPpower's Avatar
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    Sounds like you're dead on to me. I would recommend stock exhaust manifolds, a 3" catless downpipe if you don't have a sniffer test for emmisions, and stock exhaust behind that.

    Then, some kind of intake...FWI, CAI, HAI, etc...

    3.5 pulley

    Any off the shelf pcm's will be fine. ZZP, WBS, Intense, 3800 performance, Overkill, etc..

    Autolite 605's would work great as well.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  3. #3 Re: Want to make my '04 impala ss faster 
    GXP Level Member ryangtp89's Avatar
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    awsome, that's good to know i have a decent memory haha. I would prob will go with a catted 3" because our state looks for them but doesnt do the sniffer test.
    SLP headers, Wizaird cai, zzp1.0pcm ,slp powerflo catback, 3.4mps, NGK TR55's, 180*, zzp stage 1 hv tb,tb spacer, tb heatshield, Triple Edge Performance High performance Tranny, flipped motor mounts, spring blockers, prj 10.4mm wires, Sloted rotors & Ceramic brake pads,Alternator Voltage Booster. zzp 1.9 rockers & 105# springs
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  4. #4 Re: Want to make my '04 impala ss faster 
    GXP Level Member GTPpower's Avatar
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    Good choice. There isn't much difference in performance between catted on non-catted.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  5. #5 Re: Want to make my '04 impala ss faster 
    GTX Level Member asite57's Avatar
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    the do make a piece of pipe that looks like a cat on the outside and is a straight pipe on the inside, just buy a cone filter from the autoparts store and put it on the end of the TB thatll work just as good. i wouldnt go with a 3.5" thats a little small 3.6" is pushing it as is with headers. as for the canned tune id try to find someone local who can tune first as a in car tune will always be 10000X better then a canned one
    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: Want to make my '04 impala ss faster 
    Moderator DanPrixGTP's Avatar
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    3.6" is pushing it with headers?

    Thats false.

    In car tunes are the best but if you can't find someone to do it for you, I would recommend Overkill for your mail in PCM.
    '97 GTP - Stage 2 Heads, 90# Springs, 1.9 Harland Sharp Rockers, Gen V, 3.0, Intake, N* TB, LQ4, FSIC, 10.5mm Wires, Poly Mounts, SLP Headers, Borla Exaust, Built Trans - SOLD*

    '08 G8 GT - 6.7L 408CI Stroker, 239/254 Cam, Fast Intake, 102mm TB, CAI, Full Exhaust.





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  7. #7 Re: Want to make my '04 impala ss faster 
    GTX Level Member asite57's Avatar
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    ive seen 3.4" pulley set ups have KR with headers
    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: Want to make my '04 impala ss faster 
    GTX Level Member asite57's Avatar
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    id rather run a smaller pulley with more timing and actually have noticeable gains come out of it
    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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  9. #9 Re: Want to make my '04 impala ss faster 
    Moderator DanPrixGTP's Avatar
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    Quote Originally Posted by asite57 View Post
    ive seen 3.4" pulley set ups have KR with headers
    Yeah but that's a 3.4

    Not a 3.6
    '97 GTP - Stage 2 Heads, 90# Springs, 1.9 Harland Sharp Rockers, Gen V, 3.0, Intake, N* TB, LQ4, FSIC, 10.5mm Wires, Poly Mounts, SLP Headers, Borla Exaust, Built Trans - SOLD*

    '08 G8 GT - 6.7L 408CI Stroker, 239/254 Cam, Fast Intake, 102mm TB, CAI, Full Exhaust.





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  10. #10 Re: Want to make my '04 impala ss faster 
    Moderator DanPrixGTP's Avatar
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    Quote Originally Posted by asite57 View Post
    id rather run a smaller pulley with more timing and actually have noticeable gains come out of it
    You mean a larger pulley + more timing...?
    '97 GTP - Stage 2 Heads, 90# Springs, 1.9 Harland Sharp Rockers, Gen V, 3.0, Intake, N* TB, LQ4, FSIC, 10.5mm Wires, Poly Mounts, SLP Headers, Borla Exaust, Built Trans - SOLD*

    '08 G8 GT - 6.7L 408CI Stroker, 239/254 Cam, Fast Intake, 102mm TB, CAI, Full Exhaust.





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  11. #11 Re: Want to make my '04 impala ss faster 
    GTX Level Member asite57's Avatar
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    Yes that's what I meant hahaha sorry idk man I'm just speaking from experience but then again my cars hates mods :/....and maintenance hahahah
    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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