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My build....421CI

This is a discussion on My build....421CI within the Internal Engine forums, part of the LSx Technical Help Section category; Well here is my build, 421 ci Lq9. The starred items are items I already have, feel free to let ...

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    Moderator 98TransAmWs-6's Avatar
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    My build....421CI

    Well here is my build, 421 ci Lq9. The starred items are items I already have, feel free to let me know if you feel there is something missing from my build that I may need. The goal is max power NA.

    Engine:
    *4.030 bore Iron Block
    *DSS 4.030" -5 cc flat top pistons
    *Total Seal CR Classic Race Piston Rings
    *Dura-Bond High Perfomrance Cam Bearings
    *Clevite H-Series Rod Bearings CB663HN Standard Size
    *King Racing Main Engine Bearings for LS1 & LS2 Engines
    *K1 6.125" stroker rods
    *K1 4.125" crank
    *ARP main cap studs
    *TFS 6 bolt 255 LS3 Heads
    *ARP head studs
    *Tick Performance Custom Cam, Cam Motion 8620 Core
    *C5r timing chain
    *LS2 Timing Chain Dampener
    *Hex-A-Just Timing Set
    *Melling High Volume Oil pump (blue printed and ported)
    *TFS spring kit w/titanium retainers
    *Morel 5206 Link bar lifters
    *Tick Performance Chromoly Pushrods 7.725" length 3/8" thick
    *LS3 Rocker Arms w/ comp cams upgrade
    *GM ls3/ls9 head gasket
    *Stroker Windage Tray
    *7 quart racing oil pan
    *On block Oil filter adapter



    Induction:
    TSP 2" x 3.5" LT headers
    Custom work to turn out the fenders
    *FAST 102 LS3 intake
    *NW 102 TB
    *Speed Density (4" smooth bellows)
    *FTP 104 lid

    Fuel system:
    *Walboro 450 lph fuel pump
    *95# Deatschwerks injectors


    Brakes:
    *CTS-V brembos
    *R1 Concept rotors and Hawk HP+ pads
    *SS brake lines

    Drivetrain:
    Hawks Third Gen 8.8 rear w/3.73 gears
    Carbon Fiber or Chromoly driveshaft (haven't decided what company)
    *Precision Industries Vigilante 4000 stall
    *Built 4l60e


    Suspension:
    *Bilstein shocks
    *Vogtland lowering spring
    *UMI Double adjustable PHB rotojoints
    *UMI LCA rotojoints
    *UMI LCA relocation brackets
    *UMI PHB relocation kit
    *UMI 3 pt SFCs
    Strano hollow sway bars
    *UMI Adjustable A-arms rod ends
    *UMI Road Race k-member
    *UMI Solid motor mounts
    *Poly transmission mount

    Tires:
    *BFGOODRICH KDW 275 35 18 front
    *BFGOODRICH KDW 335 30 18 rear

    Wheels:
    *Ace Alloy Slick 18x9.5/18x11 (+53 offset)
    Last edited by 98TransAmWs-6; 04-12-2016 at 04:35 AM.
    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.
    (Coming Soon) BMR DSL, UMI TQ Arm
    421 LQ9 14.8:1 on E85 Build/

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
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    poor bastard DaytonaBlues's Avatar
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    hope your good with setting up valvetrains...pushrods?? screw in rocker studs? adjustable roller rockers?...im told thats the hard part of a good built, that and getting the damn thing tuned. oh yea, im assuming there isnt a 10 bolt in this car. lol kablooey...
    Last edited by DaytonaBlues; 10-26-2013 at 03:43 AM.

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    Senior Member cpop98ws6's Avatar
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    Valve train is easy, once you lean the basics your golden.

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

    I have pushrods but for a different build so I'll need to check length to see if I need a different size or not. I also forgot to put in there BTR trunion upgrade. I have a 10 bolt currently but I will be getting a strange s60.

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    poor bastard DaytonaBlues's Avatar
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    99 SS clone M6

    that motor is gonna blow the tires off at the hit..hope you got some good D/R's..sure wish I could build that thing. 500 horse on the button. are you just 1/4 mile just cause the auto tranny with this..

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

    I am researching tires to use and am going to get my ws6 wheels widened in the rear to 12" for 315s. Drag and road race will be the uses but mostly road racing. I will be upgrading to a manual or 4l80e at some point.
    Last edited by 98TransAmWs-6; 10-26-2013 at 01:19 PM.

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

    Go 4L80E, as much fun as manuals are, the auto's are killing at the tracks....

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    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    Go 4L80E, as much fun as manuals are, the auto's are killing at the tracks....
    That was what I was thinking but I'll do that much further down the road.

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    Moderator 98TransAmWs-6's Avatar
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    Next on my order list will be 95# injectors, trunion upgrade, and btr lifters as well as a racetronix fuel pump.

    For a trans rebuild kit how much power would you say for my build it would need to hold 550 or 700hp? I am thinking 700hp which would give breathing room but maybe not.
    Last edited by 98TransAmWs-6; 12-04-2014 at 06:40 PM.

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

    If you can afford it go with the higher, you never know when you might want to add power adders like Nitrous or Force Induction

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    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    If you can afford it go with the higher, you never know when you might want to add power adders like Nitrous or Force Induction
    At the moment I can't afford either but come tax refund time I will be able to afford the 700 HP kit. Hopefully I will be able to get my Strange S60 rearend as well at that time. I know I won't ever do nitrous but at some point I may do a supercharger.

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    Moderator 35th-ANV-SS's Avatar
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    So you're upgrading your current trans just to get rid of it soon for a better auto trans or a manual? Or, is this like years down the road? Just wondering as anything you put into it will likely be a lost investment when going to sell.
    It's on jackstands.

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    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    So you're upgrading your current trans just to get rid of it soon for a better auto trans or a manual? Or, is this like years down the road? Just wondering as anything you put into it will likely be a lost investment when going to sell.
    I don't know when I'll do the swap but at the same token I would rather not have my trans blow up from the stroker. Right now I am just trying to plan. I wish I could fit a 4l80e or manual swap in but that isn't possible atm. Now if my trans would survive stock I could save and do the swap sooner but I doubt that.

    The swap would likely be a few years from now.
    Last edited by 98TransAmWs-6; 09-15-2014 at 07:44 PM.

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    Moderator 35th-ANV-SS's Avatar
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    I wonder if anyone on here is running a stock transmission with that kind of power. Would be nice to see someone chime in with real life experience on this. I would also vote for an auto transmission in lieu of a manual one. I love my manual, but it's tough being consistent with it when racing.

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    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    I wonder if anyone on here is running a stock transmission with that kind of power. Would be nice to see someone chime in with real life experience on this. I would also vote for an auto transmission in lieu of a manual one. I love my manual, but it's tough being consistent with it when racing.
    I am curious as well and I think I am going to go with a 4l80e and I may just see how long the trans lasts with the power I am looking at or since I may be able to do a 4l80e swap instead of a 4l60e performance rebuild. From my research all that is needed is:

    4l80e
    Driveshaft for 4l80e
    Standalone harness for the 4l80e
    Crossmember for 4l80e
    Torque arm relocation kit

    I want to say when I was looking at it it came over just over $1000 depending on the price of the 4l80e. I would be using a used 4l80e.
    Last edited by 98TransAmWs-6; 09-15-2014 at 07:46 PM.

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    Senior Member kingls1's Avatar
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    99 Trans Am, SLP Lid, Blackwing filter, smooth bellow, Ported TB, LS6 intake, Ws6 lower ram air box, OBX LT's, Magna Flow cat back, LS7 clutch, Tick MC, Hurst Shifter, Frost Tune, UMI SFC,LAC, STB, PB, Torq Arm, Super Hawk hood, Torq Thrust II, Kee Audio.
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    Moderator 35th-ANV-SS's Avatar
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    Have you been looking for used ones already? If so, are they easy to find? Just curious.

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    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    Have you been looking for used ones already? If so, are they easy to find? Just curious.
    Yes I have and they are reasonably easy to find on ebay. I have found them from $350 on up.

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    Moderator 98TransAmWs-6's Avatar
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    I have actually decided to switch the internals to K1 technologies stuff (new rod length of 6.125) and using a 4.125 crank to make this a 395 build. I want to use wiseco pistons but I can't seem to find a piston for a 3.905 bore, 4.125 crank, 6.125 rod, and is a flat top between -2.8 and -3.1cc. Without the valve relief my compression is going to be 12.4 which I believe is a little high for pump gas. I can find a wiseco piston just like I need but it is +4cc.

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